Entries |
Document | Title | Date |
20080197723 | ELECTRIC MOTOR - An electric motor includes a rotation shaft, a commutator fixed to the rotation shaft, an armature provided with armature coils electrically connected to the commutator, the armature rotatably housed in a motor housing, a brush slidably contacting with the commutator, a power feeding terminal including a positive electrode plate and a negative electrode plate, and supplying electric power supplied from a power source to the brush and an electric noise reduction device provided between the positive electrode plate and the negative electrode plate of the power feeding terminal. | 08-21-2008 |
20080203832 | ROTARY ELECTRIC MACHINE - In a power generator provided with a stator frame having a stator iron core incorporating a stator coil therein in an inner portion thereof, and a rotor in which a rotor coil rotating so as to oppose to the stator frame and the stator iron core is incorporated, the power generator is provided with a noise insulation plate fixed to a noise insulation plate attaching seat welded to an outer surface of the stator frame by a bolt and a nut, an elastic body (a gasket) is provided in a contact portion between the noise insulation plate attaching seat and the noise insulation plate, and a vibration-proofing rubber washer is provided in a contact portion between the noise insulation plate and the nut. | 08-28-2008 |
20080211329 | Electric motor - The invention relates to an electric motor, particularly a spindle motor used for driving storage disks in hard disk drives, having a stationary bearing part ( | 09-04-2008 |
20080218009 | Brushless motor and manufacturing method thereof - A centerpiece rotatably supports a rotatable shaft therein. A stator core is placed radially outward of the centerpiece. A generally cylindrical vibration isolator is made of a resilient material and is radially placed between the centerpiece and the stator core. | 09-11-2008 |
20080238221 | SOUNDPROOF TYPE ENGINE GENERATOR - A soundproof type engine generator has a first external air inlet and a second external air inlet formed on a soundproof case K. A first cooling passage guides external air drawn in through the first external air inlet through a duct to a first fan, then from the first fan to a generator and discharges the air out of the soundproof case K. A second cooling passage guides external air drawn in through the second external air inlet to an engine using a second fan and then discharges the air out of the soundproof case The first fan is made up of a disk-like planar part, a plurality of first blades and a plurality of second blades, respectively provided radially on both head and tail sides of the planar part. External air drawn with the plurality of first blades through the first external air inlet is guided through the duct to the generator, and discharged out of the soundproof case. Air in the soundproof case is discharged with the plurality of second blades out of the soundproof case. The soundproof type engine generator effectively cools the interior of the soundproof case and simplifies the constitution of the air feed passage via the layout and configuration of the fan. | 10-02-2008 |
20080252154 | Motor having improved mounting structure - A motor having an improved mounting structure is composed of a rotor including a rotor yoke; a stator including a bearing, a bearing holder and a base plate fixed to one end portion of the bearing holder; a shaft fixed to the rotor yoke and a damping member interposed between the bearing holder and the base plate. The bearing is fixed to the bearing holder. The rotor is supported through the shaft so as to be rotatable freely with respect to the stator. The bearing holder is fixed to the base plate with having a first area in which the bearing holder directly contacts with the base plate and a second area in which the damping member is interposed between the bearing holder and the base plate. | 10-16-2008 |
20080258569 | Driving apparatus for vehicle - A vehicle driving apparatus includes a rotating electrical machine; a power transmitting gear mechanism; and a case in which the rotating electrical machine and the gear mechanism are housed in series in an axial direction of the rotating electrical machine, wherein a low rigidity region, which is a region of the case having low rigidity located at an outer periphery of the rotating electrical machine, is covered by a silencer supported on a high rigidity region of the case having a higher rigidity than the low rigidity region. | 10-23-2008 |
20080258570 | Stator - The present invention provides a stator coiled in a spiral, capable of mechanically inserting a wound coil in the slot of a stator core. In a stator in which coils are overlapped in a spiral when viewed from the end surface of the stator core after each of one sides of a plurality of coils wound in advance is inserted in the slot of the stator core and each of the other sides of the plurality of coils is inserted in a different slot, by repeating the inserting operation twice or more, the loop of the coils overlapped in a spiral are piled in two layers or more in the radius direction of the stator core and the total coil sectional area inserted in the slots of the stator core is larger than a prescribed value based on the inside radius of the stator core. | 10-23-2008 |
20080265696 | DEVICES, SYSTEMS, AND METHODS FOR RELIEVING STRESS - Certain exemplary embodiments comprise a method that can comprise, via a device that originates sub-harmonic vibrations, applying a vibration treatment, to a rotor of an electric motor for a predetermined time period. The rotor can be thermally sensitive. The vibration treatment can be adapted to reduce internal stresses in the rotor, thereby reducing a vibration level of the rotor. | 10-30-2008 |
20080265697 | Electrical Machine, in Particular Rotary Current Generator - The invention relates to an electrical machine, in particular a three-phase alternator ( | 10-30-2008 |
20080265698 | VIBRATION-DAMPING ROTOR ASSEMBLY - A rotor assembly comprising a rotor for rotating in a magnetic field of a motor, the rotor comprising a main rotor cavity and a plurality of first holes; two side boards, each side board comprising a sleeve-shaped main side board body and a disc-shaped outer side board body, the side board body having a main side board cavity, and the outer side board body being perforated by a plurality of second holes; two damping elements each damping element comprising a main damping element cavity; a plurality of rubber sleeves, each rubber sleeve having a rubber sleeve lip; and a plurality of third holes; an axle; and a plurality of positioning pins. | 10-30-2008 |
20080278010 | Switched reluctance motor - A switched reluctance motor has a rotor and a stator. The stator has first and second stator magnetic pole groups sequentially placed in an axial direction of the rotor. First and second stator magnetic poles in each group are alternately arranged on a same circumference. The first stator magnetic poles are placed every electrical angle | 11-13-2008 |
20080296985 | Brushless motor - In a brushless motor, a stator includes an annular core member. A rotatable shaft is placed radially inward of the core member and extends in an axial direction. A rotor is supported by the rotatable shaft. A centerpiece supports the core member and includes a center portion, which is placed radially inward of the core member. A platy vibration absorbing member connects between the core member and the center portion of the centerpiece and damps circumferential vibrations transmitted from the core member. | 12-04-2008 |
20080315691 | ROTOR OF BRUSHLESS MOTOR - Some embodiments of the present disclosure provide a rotor of an electric brushless motor configured to be light weight and prevent vibrations generated during an operation of the motor to be transferred to the shaft of the rotor. The rotor includes a shaft elongated in a rotational axis, a single body magnet comprising alternately magnetized portions, and a vibration absorption portion interposed between the shaft and single body magnet. The vibration absorption portion absorbs vibrations generated during the operation of the motor and can include an elastic or a non-elastic material. The rotor further includes a non-elastic portion inhibiting the expansion of the vibration absorption portion when the vibration portion is elastic. | 12-25-2008 |
20090015080 | Synchronous Machine Using the Fourth Harmonic - The invention relates to a permanently excited synchronous machine and a method for the suppression of harmonics. The permanently excited synchronous machine ( | 01-15-2009 |
20090045685 | MOTOR FIXING STRUCTURE AND MOTOR ASSEMBLY - A motor fixing structure and a motor assembly capable of reducing vibration of a motor and also maintaining a compact configuration. The motor assembly includes a motor, a fixing member disposed to be spaced from the motor by a predetermined spacing distance, and a vibration absorbing member to prevent vibration of the motor from being transferred to the fixing member, wherein the vibration absorbing member is formed to be longer by a predetermined specified length than the predetermined spacing distance between the motor and the fixing member and is disposed outside of a periphery of the motor. | 02-19-2009 |
20090051231 | BUFFER STRUCTURE FOR HEAT DISSIPATING FAN - A heat dissipating fan includes a housing ( | 02-26-2009 |
20090058202 | Rotor of brushless direct-current motor - A permanent magnet rotor of a brushless direct current (BLDC) motor, in which cogging torque ripple and electromagnetic vibration noise transferred to the permanent magnet rotor can be blocked and a motor's power-to-weight ratio can be improved. A conventional BLDC motor has to use an electric steel sheet core so as to maintain the maximum magnetic flux density of the permanent magnet rotor and to minimize a rotating electric field loss. As a result, cogging torque vibration is unavoidably transferred to a load side through the motor rotary shaft. However, the rotor can enable stable driving of the BLDC motor by innovatively blocking the cogging torque vibration and the electromagnetic vibration noise and can greatly reduce the motor's weight by using a plastic or non-magnetic material instead of an electric steel sheet core. | 03-05-2009 |
20090058203 | Motor attachment assembly for plastic post isolation system - The invention provides for a motor attachment assembly that includes an electric motor having spring clips adapted to securely lock onto the isolation posts of a plastic post vibration isolation system. The motor includes an end cap that has notches which cooperate with locator tabs of the motor housing to lock the cap onto the housing with the spring clips therebetween. Each clip includes an axial slot that is expandable in an open direction to receive an isolation post and biased in the closed direction to retain the isolation post. Each clip also has an inner surface with barbs protruding into the channel to allow insertion of the isolation post into the channel in the direction of the output shaft and to resist movement of the isolation post in a direction opposite to the output shaft. The inner surface has a retention groove to receive plastically deformed portions of the isolation post. | 03-05-2009 |
20090066174 | Method of Balancing an Embedded Permanent Magnet Motor Rotor - A method of balancing an embedded permanent magnet motor rotor includes the steps of: a) providing a non-magnetic cylindrical shaft having an axis of rotation and a generally cylindrical surface with an even number of recessed slots defining an even number of ribs therebetween; b) machining an axial slot having a cross-section with a top opening, a bottom and two sides in a center portion of each of the recessed slots; c) sliding at least one balance weight into at least one of the axial slots; and d) inserting locating rods into the axial slot on each side of the at least one balance weight. | 03-12-2009 |
20090072640 | AXIAL GAP-TYPE ELECTRIC MOTOR - An electric motor includes a stator, at least one rotor, an output shaft engaged with the at least one rotor, and a contact area changing device configured to change an area of contact between the at least one rotor and the output shaft, wherein the area of contact between the at least one rotor and the output shaft affects a characteristic resonant frequency of the at least one rotor. A method to reduce vibrations in an electric motor includes engaging an output shaft into at least one rotor, rotating the output shaft and the at least one rotor with respect to a stator, changing an area of contact between the at least one rotor and a radial protrusion of the output shaft, and shifting the resonant frequency of the at least one rotor with the changed area of contact. | 03-19-2009 |
20090108686 | ROTOR OF BRUSHLESS (BL) MOTOR - The present invention provides a rotor of a brushless (BL) motor, including: a high-strength engineering plastic member formed by injection-molding high-strength engineering plastic around a concavo-convex portion | 04-30-2009 |
20090152963 | DECOUPLING DEVICE AND METHOD FOR THE PRODUCTION OF AN ELECTRIC MOTOR - The invention relates to a device for mounting an electric motor ( | 06-18-2009 |
20090160268 | MOTOR ASSEMBLY INCORPORATING A SECURELY POSITIONED ELECTROMAGNETIC DISTURUBANCE SUPPRESSION DEVICE - A motor assembly ( | 06-25-2009 |
20090179508 | SOUNDPROOF SHREDDER MOTOR - The present invention discloses a soundproof shredder motor. The motor includes a soundproof mask which surrounds the contact between the rotor and carbon brush. The soundproof mask includes an inner mask and an outer mask formed with holes arranged in an alternating fashion. The disclosed motor soundproof mask encloses the frictional interaction between the rotor and the carbon brush, thereby reducing the noise resulting from the contact. Additionally, since the mask is located near the noise source, it occupies a small space and is less expensive to manufacture. The mask also serves to contain sparks. | 07-16-2009 |
20090212646 | BALANCE MEMBER, MOTOR, AND DISK DRIVE APPARATUS - A balance member includes a first arc-shaped portion extending in a circumferential direction about a predetermined central axis, and a second arc-shaped portion having an end portion opposing and connected to an end portion of the first arc-shaped portion. The thickness of the first arc-shaped portion is greater than the thickness of the second arc-shaped portion. | 08-27-2009 |
20090236920 | SYSTEMS AND METHODS INVOLVING OPITMIZED MOTORS - A motor comprising, a rotor having a shaped pole operative to minimize cogging torque and electro motive Force (EMF) harmonics, a stator having teeth members, the teeth members including, end portions, wherein the end portions partially define slot openings having a first dimension, and a notch opening defined by the end portions having a second dimension. | 09-24-2009 |
20090261666 | Radially Balanced Stator Forces for a Spindle Motor - A spindle motor is provided for reducing or eliminating RRO and NRRO. Radial forces on the spindle motor are reduced or eliminated, and the net rotational torque is increased. Read and write heads may be placed increasingly closer to a memory storage disc surface, and are accurately aligned with the disc storage tracks. This allows increased track densities, and also allows for smaller discs and increased storage capacity of discs. In an aspect, a first stator tooth and a second stator tooth are positioned to generate substantially equal and opposite radial forces on the spindle motor. The first and second stator teeth are also simultaneously energized to cause the interaction of the stator with the magnet. In another aspect, the first stator tooth is positioned 180 degrees circumferentially about the stator from the second stator tooth, and axially above the second stator tooth. | 10-22-2009 |
20090289511 | VIBRATION ABSORBING BEARING AND BLOWER MOTOR FOR VEHICLES HAVING THE SAME - A vibration absorbing bearing supports an armature shaft and a blower motor for vehicles. The vibration absorbing bearing may include a longitudinal groove which is formed on the inner circumference of the bearing in such a way as to extend in a longitudinal direction and hold a lubricant therein. The blower motor for vehicles may include a main body, a stator installed in the main body, an armature assembly installed in the main body and having an armature shaft, and the vibration absorbing bearing. Such a construction improves the durability of components and achieves the joining of the components and the absorption of vibration, thus efficiently isolating cogging noise. | 11-26-2009 |
20090302696 | Oscillation Damping System for a Stator of an Electrical Machine - An oscillation damping system for stator windings is provided which includes a supporting component of an end winding. The supporting component is equipped with damping elements, which are arranged asymmetrically in the circumferential direction in order to suppress excited natural oscillations. Masses or springs and screw-type restraints which connect the supporting component to the stator housing are suitable as damping elements. | 12-10-2009 |
20100001594 | MOTOR - A motor may include a rotor having a rotation shaft, a stator disposed on an outer peripheral side of the rotor, an output side bearing which supports an end part on an output side of the rotation shaft in a radial direction and an axial direction, a frame which is provided with a bearing holding part for holding the output side bearing and which is fixed to the stator, and an urging member which is attached to the bearing holding part for urging the output side bearing to an opposite-to-output side. The bearing holding part is formed with a bearing hole which penetrates through the bearing holding part and on which the output side bearing is disposed, and the output side bearing is disposed on the bearing hole in a movable state in the axial direction of the rotation shaft. | 01-07-2010 |
20100045124 | ROTARY ELECTRIC MACHINE - A rotary electric machine, for solving problems that a space for installing the noise insulation enclosure around the rotary electric machine and a base for installing the noise insulation enclosure are necessary, and that the noise insulation enclosure reducing the noise on an outer side of the noise insulation enclosure does not reduce the noise on an inner side thereof, and the inspecting worker entering thereinto is exposed to a loud noise of the rotary electric machine, the rotary electric machine comprising a stator frame having a stator iron core incorporating a stator coil therein in an inner portion thereof, and a rotor in which a rotor coil rotating so as to oppose to the stator frame and the stator iron core is incorporated, further comprising a noise insulation plate fixed to a noise insulation plate attaching seat welded to an outer surface of the stator frame by a bolt and a nut, an elastic body which is provided in a contact portion between the noise insulation plate attaching seat and the noise insulation plate, and a vibration-proofing rubber washer which is provided in a contact portion between the noise insulation plate and the nut. | 02-25-2010 |
20100052440 | DIRECT CURRENT MOTOR - A direct current motor with brushes in which an armature is provided with a rotating shaft that is supported by a yoke housing, an armature core that is fitted and fixed to a rotating shaft from the outer side, and a commutator that is provided on the rotating shaft adjacent to the armature core with nine segments arranged in the circumferential direction. The armature core has nine teeth that extend in the radial direction in a radial pattern and nine slots that are formed between the teeth and extend in the axial direction, the segments having the same polarity are connected with short-circuiting members, and a pair of brushes that make sliding contact with the segments is disposed so as to be mutually point symmetric centered on the rotating shaft. According to the preset invention, it is possible to effectively achieve flattening of the direct current motor. | 03-04-2010 |
20100084930 | SPINDLE MOTOR - A spindle motor is disclosed that is capable of mitigating vibration caused by eccentricity of a disk and a turn table due to optimization of a cross-sectional area occupied by balls relative to that of a space in which the balls are stored. | 04-08-2010 |
20100117465 | ROTATING ELECTRIC MACHINE - In a rotating electric machine, a path length between a rotor and an inter-hetero-phase tooth where a magnetic flux from a magnetic pole proceeds from the rotor and starts to enter the inter-hetero-phase tooth is longer than a path length between the rotor and an inter-V-phase tooth where the magnetic flux proceeds from the rotor and starts to enter the inter-V-phase tooth. | 05-13-2010 |
20100164309 | SUPERCONDUCTING MOTOR APPARATUS - A superconducting motor apparatus includes a superconducting motor including a superconducting coil and a mover movable on a basis of a movable magnetic field generated by the superconducting coil when an electric power is supplied thereto, a container defining an outer vacuum heat insulation chamber that covers an outer side of the superconducting motor, an extremely low temperature generating portion cooling the superconducting coil of the superconducting motor to a temperature equal to or smaller than a critical temperature of the superconducting coil, and a vibration damping element restraining one of or both of a vibration of the superconducting motor and an external vibration from being propagated to the extremely low temperature generating portion. | 07-01-2010 |
20100231064 | BALANCE RING FOR A VEHICULAR ELECTRIC MACHINE - An electric machine for deployment in a vehicle, with the electric machine having a housing is provided. The electric machine comprises a stator assembly coupled to the housing, and a rotor assembly disposed within the stator assembly and configured to rotate relative thereto. A balance ring is coupled to an end of the rotor assembly and is configured to rotate therewith. The balance ring comprises an annular base layer having a first planar surface, and an annular magnetic shielding layer having a second planar surface clad to the first planar surface | 09-16-2010 |
20100259115 | Motor - A motor includes a base, a stator mounted to the base, a rotor rotatably coupled to the base, and a balancing member. The rotor includes a permanent magnet having a first magnetically conductive face with a first width in a radial direction. The balancing member includes an upper surface facing the permanent magnet. A magnetically conductive section is formed between the upper surface and the first magnetically conductive face. The balancing member further includes a magnetically attracting portion in the magnetically conductive section. The magnetically attracting portion includes a second magnetically conductive face having a second width in the radial direction. The second width is not greater than the first width. A magnetically attracting spacing is formed between the first and second magnetically conductive faces and in a range of 0.2-1.5 mm. | 10-14-2010 |
20100259116 | Spindle Motor - A spindle motor is provided. The spindle motor includes a base, a bearing housing, a bearing, a rotation shaft, a stator, a bushing, and a rotor. The bearing housing is installed on the base. The bearing is fixed inside the bearing housing. The rotation shaft is installed to be supported by and rotate on the bearing. The stator is disposed around the bearing housing. The bushing is coupled to the rotation shaft. The rotor is coupled to the bushing to rotate through interaction with the stator. | 10-14-2010 |
20100270874 | ARRANGEMENT FOR A POWER ELECTRONICS UNIT IN A HYBRID VEHICLE - In an arrangement for a power electronics unit in a HEV, the HEV including a combustion engine, an electric motor/generator, a transmission, the power electronics unit is shaped as a plate. The plate is extended along a transmission side, the power electronics unit is fixed to the power train with a first attachment point. All attachment points have a total thermal conductivity corresponding to more than 10 degrees temperature difference on a Kelvin-scale between the power electronics unit and outside surface of said first transmission side and/or outside surface of the motor/generator for 5 kW of heat originating from one side of said attachment point. Embodiments also including sound damping capabilities are disclosed. The arrangement facilitates use of fewer parts and increased functionality. | 10-28-2010 |
20100327676 | ELECTRIC MOTOR - An electric motor, including stator core, a shaft, and a shock-absorbing connector including multiple brackets, and a rubber pad. The stator core and the shaft are disposed between the brackets, the shaft is nested in the stator core but not directly mechanically-connected thereto, tightly abuts against the bracket, and passes through the stator core. A through hole is disposed in the stator core and parallel to the shaft, and the rubber pad is received in the through hole. | 12-30-2010 |
20110001369 | Quiet blender - The present invention relates generally to loud disturbing noise accompanied with uncontrollable vibrations and, sound wave vibrations made from electric motor appliances such as blenders. Abstract: An electric motor design housing, filled with qualified sound deadening and temperature absorbing material, where in this case, the small electric motor of a blender operates in said invention, which is a designed motor housing filled with qualified sound deadening and temperature absorbing material, greatly reducing noise and vibration when appliance is used in operation mode. | 01-06-2011 |
20110101800 | APPARATUS FOR HOLDING AN ELECTRICAL MACHINE SUCH THAT IT IS DECOUPLED FROM VIBRATION - The invention relates to an apparatus for holding an electrical machine ( | 05-05-2011 |
20110121667 | MOTOR DAMPING STRUCTURE FOR ACTUATOR DEVICE - A motor damping structure for an actuator device includes a motor housing and a casing. The motor housing includes a drive motor therein. The casing includes an upper actuator case and a lower actuator case to accommodate the motor housing therebetween, the casing including a motor support section formed integrally in at least one of the upper actuator case and the lower actuator case to support the drive motor by contacting an outside surface of the motor housing. The motor support section has an elastic contacting member protruding from the at least one of the upper actuator case and the lower actuator case to contact one of an upper slanted surface and a lower slanted surface of the motor housing. | 05-26-2011 |
20110121668 | PERMANENT MAGNET ROTOR, AND ROTATING MACHINE COMPRISING SUCH A ROTOR - A rotor for rotating an electric machine having permanent magnets and flux concentration, including a shaft extending along the rotational axis of the rotor, a rotor body placed on the shaft, the rotor body having a central opening for the mounting thereof on the shaft; radially oriented recesses wherein the permanent magnets are placed; and in at least one angular space separating two consecutive recesses, at least one cavity leading neither to the central opening nor to the two consecutive recesses, the cavity or cavities located in the space occupying an angular area around the rotational axis of the rotor greater than or equal to half of the angular area of the space. | 05-26-2011 |
20110121669 | MOTOR WITH ECCENTRIC ROTOR - The invention relates to a rotary electric machine with an eccentric rotor that comprises a stator and an eccentric rotor, the stator including a plurality of magnetic poles circumferentially distributed in order to define a closed cylindrical space, the rotor having a generally cylindrical shape with a diameter lower than that of said closed space and including a plurality of magnetic poles circumferentially distributed, the rotor rotating inside the closed space, wherein the machine further includes a shaft depending on the rotational component of the rotor, said machine being characterised in that, at the area of electromagnetic interaction between the stator and the rotor, the evolute of a stator pole and the evolute of a rotor pole have substantially equal lengths. | 05-26-2011 |
20110148228 | GENERATOR HOUSING, TRANSPORT MECHANISM FOR THE SAME, AND COOLING AND SOUND ATTENUATION METHOD FOR THE SAME - A generator housing includes a top portion, a plurality of side portions, and a base portion. The top, sides, and base portions are connected to form an enclosure, such that a generator can be housed inside the enclosure. The top and side portions include an air and exhaust flow structure that facilitates cooling of a generator maintained inside the housing, that provides a sound attenuation function, and that releases exhaust created by a generator. At least one of the side portions and the top portion may be opened and closed to provide access inside the housing. The base portion includes a structure that facilitates installation and transport. | 06-23-2011 |
20110193431 | MOTOR PULLEY - A motor pulley minimizes an influence of a resonance phenomenon, thereby reducing noise and vibrations and preventing lowering of durability. | 08-11-2011 |
20110254390 | MOUNTING ARRANGEMENT FOR AN ELECTRICAL MACHINE - A mounting arrangement for locating a stator ( | 10-20-2011 |
20110266895 | ROTATING ELECTRICAL MACHINE - According to one embodiment, a rotating electrical machine has a vibrating-element. The vibrating-element has spring bars and circular members which cover spring bars while a part is connected to spring bars. The spring bars are connected to first stator core connection portions, which are formed so as to be spaced out in a circumferential direction from each other at two locations on a side surface of the stator core. The stator frame is connected by the second stator core connection portions, which are formed by two locations which are different from the first stator core connection portions, of the stator core. The second stator core connection portions contain a position adjacent to a node portion of a circular mode of vibration of the stator core, in which antinodes and nodes of vibration alternately appear in the circumferential direction as the vibrating-element is attached to the stator core. | 11-03-2011 |
20110309696 | ELECTRIC MOTOR DRIVE, IN PARTICULAR FAN DRIVE - An electro-motor drive, in particular for a fan drive of a motor vehicle, includes a commutator motor, a motor shaft of which is rotatably mounted on axially opposite sides in shaft bearings facing away from the bearing shield in order to substantially dampen the sound of at least bearing play-related contact noise and vibration or humming noise. | 12-22-2011 |
20120007454 | MOTOR WITH TORSIONAL ISOLATION MEANS - An electro-mechanical energy conversion device is provided having an armature with a central cavity. The armature is rotatably mounted in a frame. A torsion bar is positioned within the armature with one end connected to the armature and the other end connected with an energy source or consuming device. | 01-12-2012 |
20120074797 | Sectionalized Electromechanical Machines Having Low Torque Ripple and Low Cogging Torque Characteristics - A method and apparatus for reducing or eliminating the effects of torque ripple and cogging torque and otherwise improving performance in an electromechanical machine such as a motor or generator. The rotor and/or stator is conceptually sectionalized and the sections spaced apart by amount sufficient to alleviate deleterious aspects of cogging torque and torque ripple. Positioning of the stator teeth or rotor magnets is determined based on the calculated spacing. Conceptual sections may be formed as physically individual segments. Unwound teeth may be disposed in end spaces between sections occupying less than the entire area of the end space. | 03-29-2012 |
20120098358 | Tuned Bearing - A bearing assembly for a submersible pump motor has a bearing body, having a hub, an outer portion, and a plurality of wing portions. The wing portions are spaced apart to form a plurality of cavities in the bearing body. A mass damper is mounted to the hub. The mass damper has an upper portion, a lower portion and mass damper prongs connecting the upper and lower portion. The mass damper prongs are disposed in the cavities, and act to reduce the amplitude of the vibrating frequency of the motor shaft. | 04-26-2012 |
20120098359 | ROTOR OF COMPRESSOR MOTOR - There is provided a rotor of a compressor motor at a low cost in which a balance weight is stably positioned. A rotor includes a rotor laminated steel plate ( | 04-26-2012 |
20120104882 | MOTOR ROTOR SYSTEM - A motor rotor system including: an axis of rotation, a rotor iron core mounted on the axis of rotation, a permanent magnet, a magnetic ring bracket, and a magnetic ring. The permanent magnet, the magnetic ring bracket, and the magnetic ring are mounted on the rotor iron core. The magnetic ring is sheathed on the magnetic ring bracket. The magnetic ring bracket is located at one end of the rotor iron core and connected with an end face of the rotor iron core. The motor rotor system has excellent batch-to-batch consistency, simple structure, and convenient installation. It is suitable for large batch production and can be controlled using sine-wave driving control methods with a position sensor. | 05-03-2012 |
20120169156 | Suspension Structures - A support structure is used to mount the stator of a rotating electrical machine (e.g. a motor or generator). The support structure includes a rigid external support frame ( | 07-05-2012 |
20120175976 | Arrangement For Acoustic Decoupling Of A Stator Of An Electric Motor - The invention relates to an arrangement for acoustic decoupling of a stator of an electric motor having two substantially cylindrical decoupling rings disposed on both sides of the stator and concentric to a motor shaft, each fixed to a front side of the stator on one side and each fixed to a housing enclosing the stator on the other side, and comprising recesses on the circumferential surfaces thereof. The decoupling rings hold the stator in a centered position at a distance from the housing. The recesses allow targeted acoustic decoupling. The invention is particularly applicable for electric motors in steering systems for motor vehicles. | 07-12-2012 |
20120262011 | ROTOR ASSEMBLY USING POLAR ANISOTROPIC RING MAGNET - The rotor assembly contains a number of polar anisotropic ring magnets sequentially stacked, a number of supporting rings within the stacked ring magnets, and an axle threading through the supporting rings. The ring magnets are of a same diameter and length. Each supporting ring contains three co-centric rings: an inner steel ring, a middle rubber ring, and an outer steel ring. The supporting rings are positioned with substantially equal spacing and with a gap away from each aperture of the stacked ring magnets, so that additional weight elements could be positioned and adhered within the gap. The periodic positioning of a number of supporting rings could significantly reduce the weight of the motor assembly with much improved steadiness. Additionally, the middle rubber rings of the supporting rings provide a buffer mechanism for absorbing vibration and noise reduction. | 10-18-2012 |
20120319510 | STATOR ASSEMBLY FOR MOTOR AND MOTOR INCLUDING THE SAME - There is provided a stator assembly for a motor, the stator assembly including: a base including a core mounted therein, the core having a coil wound therearound and the coil generating rotational driving force of a rotating member; and an absorbing part coupled to the base so as to be disposed on an upper surface of the core and absorbing vibrations or noise of the core. | 12-20-2012 |
20130002063 | DEVICE FOR DYNAMIC BALANCING OF A ROTATING COMPONENT - A device for limiting an unbalance in inside a centrifugal, with an electric motor to drive a rotating component disposed in an enclosure around a rotational axis, wherein a rotor of the electric motor is non-rotatably connected to the rotating component, a bearing assembly for the rotor and the stator to be arranged in, and a stabilizer unit which generates as a function of a disturbing force acting on the rotating component a balancing force that is adapted to compensate said latter, the bearing assembly including support means such as to make the stator radially movable, and the stabilizer arranged radially outside and/or inside said stator and/or support means of the bearing assembly and having stabilizing means whereby in aggregate a radial balancing force can be generated. | 01-03-2013 |
20130026865 | MOTOR AND VEHICLE-MOUNTED AIR CONDITIONER USING SAME - A motor includes a shaft, a rotor mounted to the shaft along an axial direction of the shat, a stator confronting an outer wall of the rotor via a space, a thrust plate, and a buffering plate having elastic force. The rotor and the stator are disposed such that a magnetic center of the rotor is away from a magnetic center of the stator by a given distance along the axial direction. The thrust plate is disposed in the axial direction and in a direction along which restoring force acts. The buffering plate is disposed oppositely to the shaft relative to the thrust plate and supports the thrust plate. | 01-31-2013 |
20130026866 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine has a stator and a rotor both accommodated in a frame, on which is mounted a control case to house a drive unit including an inverter. In the machine, the control case has a vibration suppression structure that suppresses vibration of the control case or adjusts a natural vibration frequency of the control case. | 01-31-2013 |
20130038149 | SILENCER MODULE FOR A GENERATOR COLLECTOR VENTILATION SYSTEM AND METHOD OF REDUCING A SOUND SIGNATURE OF A GENERATOR COLLECTOR - A generator collector ventilation system includes a ventilation inlet duct formed in a support foundation. The ventilation inlet duct has a first end that extends to a second end. The second end is configured and disposed to direct ventilation fluid into a generator collector housing. A ventilation outlet duct is formed in the support foundation. The ventilation outlet duct includes a first end portion that extends to a second end portion. The second end portion is configured and disposed to direct ventilation fluid from the generator collector housing. A silencer module is arranged in one of the ventilation inlet duct and the ventilation outlet duct. The silencer module is configured and disposed to condition the ventilation fluid passing through the generator collector housing to lower an overall noise signature of the generator collector ventilation system. | 02-14-2013 |
20130043746 | BASE ASSEMBLY FOR MOTOR AND MOTOR INCLUDING THE SAME - There is provided a base assembly for a motor, the base assembly including: a base for a motor; and a pulling plate coupled to the base to prevent excessive floating of a rotating member of the motor, wherein the pulling plate includes a space part formed by extracting a predetermined region of the pulling plate so as to reduce noise generated during rotation of the rotating member. | 02-21-2013 |
20130057092 | ROTORS FOR ELECTRICAL MACHINES - The present invention relates a rotor assembly for an electrical machine (e.g. motor or generator) where a tuned vibration absorber adapted to provide radial damping is mounted directly to the rotor shaft. | 03-07-2013 |
20130093269 | SWITCHED RELUCTANCE MOTOR - Disclosed herein is a switched reluctance motor in which a shaft of the motor and a shaft of a load are aligned with each other so that maximum torques of the motor and the shaft coincide with each other. | 04-18-2013 |
20130099608 | ROTATING ELECTRICAL MACHINES - A torsional vibration damper is integrated into a rotating electrical machine. A rotatable assembly of the electrical machine includes a rotor core pack having a first end and a second end, The integrated torsional vibration damper consists of a torsional elastic coupling and a torsional elastic damper and provides mechanical damping. The integrated torsional vibration damper is mounted to the rotatable shaft of the electrical machine by a flange. The rotor core pack is mounted at the first end to the integrated torsional vibration damper by suitable structure members such as a mounting flange and is not fixedly mounted directly to the rotatable shaft. In the case where the rotor core pack is cooled by circulating coolant fluid (e.g. MIDEL) then the integrated torsional vibration damper may be a viscous damper that uses the coolant fluid as a viscous working, fluid. | 04-25-2013 |
20130113308 | Hybrid Drive Module - A hybrid drive module includes an electric machine with a stator arrangement and with a rotor arrangement which is coupled to a torsional vibration damping arrangement. The torsional vibration damping arrangement comprises an input region and an output region. A first torque transmission path and parallel thereto a second torque transmission path and a coupling arrangement for superposing the torques transmitted via the torque transmission paths are provided between the input region and the output region. The torsional vibration damping arrangement further includes at least in the first torque transmission path a phase shifter arrangement for generating a phase shift of rotational irregularities transmitted via the first torque transmission path relative to rotational irregularities transmitted via the second torque transmission path. | 05-09-2013 |
20130113309 | ELECTRIC MOTOR DRIVE, IN PARTICULAR FAN DRIVE - An electro-motor drive, in particular for a fan drive of a motor vehicle, includes a commutator motor, a motor shaft of which is rotatably mounted on axially opposite sides in shaft bearings facing away from the bearing shield in order to substantially dampen the sound of at least bearing play-related contact noise and vibration or humming noise. | 05-09-2013 |
20130134806 | SWITCHED RELUCTANCE MOTOR - Disclosed herein is a switched reluctance motor including: a shaft forming the rotation center of the motor; a rotor part rotatably coupled onto the shaft; a first stopper coupled to an upper portion of the rotor part in the axial direction to support the rotor part; and a second stopper coupled to a lower portion of the rotor part in the axial direction to support the rotor part, wherein the first stopper or the second stopper has a separate internal space formed at an inner side thereof. A weight member is coupled to the internal space, thereby making it possible to secure stable and reliable rotation balancing even at the time of high speed rotation of the motor. | 05-30-2013 |
20130140921 | SPINDLE MOTOR - There is provided a spindle motor including a rotor hub having a driving magnet mounted on an internal surface thereof; and a pulling plate fixedly installed on a base member to be disposed below the driving magnet, wherein the pulling plate includes a body having a ring shape, protrusion portions protruded from the body, and an indent portion formed inwardly from an outer circumferential surface of the body. | 06-06-2013 |
20130140922 | ROTOR OF PERMANENT MAGNET EMBEDDED MOTOR, COMPRESSOR, AND REFRIGERATION AND AIR CONDITIONING APPARATUS - A rotor of a permanent magnet embedded motor according to this invention includes: a rotor iron core formed by stacking a predetermined number of electromagnetic steel plates perforated in a predetermined shape; a plurality of permanent magnet insertion holes formed along an outer circumferential section of the rotor iron core; permanent magnet end gaps provided at both ends of the permanent magnet insertion hole; a permanent magnet inserted in the permanent magnet insertion hole; and a plurality of slits formed in an iron core section on the outer side of the permanent magnet insertion hole. The width in the radial direction of a slit thin section of each of the slits between the slit and the rotor iron core outer circumference gradually increases from an inter-electrode side toward a magnetic pole center and changes in a sine wave shape having a peak in the magnetic pole center. | 06-06-2013 |
20130162069 | CAPACITOR-OPERATED MOTOR HAVING A SINGLE WINDING SPAN - A capacitor-operated motor having a single winding span includes a housing, a stator par, and a rotor par. The stator part is formed by stacking up a plurality of stator core plates that have a plurality of primary-phase tooth parts, secondary-phase tooth parts, and stator slots. The primary windings and the secondary windings are wound around the primary-phase tooth parts and the secondary-phase tooth parts respectively. When the current is conducted through the plurality of primary windings and the plurality of secondary windings, magnetic force is generated to rotate the rotor part. The secondary-phase tooth parts are alternately arranged with the primary-phase tooth parts with stator slot positioned in between them. The fact that the number of rotor slot is at least two times as many as that of the stator slot is capable of lowering the vibration and noise of the capacitor-operated motor having a single winding span. | 06-27-2013 |
20130193783 | ELECTRIC ROTATING MACHINE - An electric rotating machine includes a stator having a plurality of stator teeth facing a rotor. The rotor has a plurality of pairs of permanent magnets. Permanent magnets of each pair are located in a “V” shape configuration and form a magnetic pole. Every other tooth of the plurality of stator teeth is a long stator teeth and an adjacent tooth is a short stator teeth. Adjusting recesses formed in the rotor are at symmetrical, about a d-axis of each magnetic pole, locations in a way that each of the adjusting recesses has a width made equal to a width of one of the stator teeth and their deepest levels are equidistant from a d-axis of the magnetic pole in one and the opposite circumferential directions angularly about the axis of the rotor by 56° in electrical degrees. | 08-01-2013 |
20130193784 | MOTOR AND VIBRATION REDUCTION SYSTEM FOR A MOTOR - A motor includes a rotor supported for rotation about a longitudinal axis, a stator including a magnetic core, a first end plate positioned at a first end of the magnetic core, and a second end plate positioned at a second end of the magnetic core. The magnetic core, first end plate, and second end plate cooperate to define a central opening. The motor also includes a plurality of rods each fixedly attached to the first end plate and the second end plate and including a first end that extends along the longitudinal axis beyond the first end plate and a second end that extends along the longitudinal axis beyond the second end plate. A first support disk is coupled to the first end of each of the rods and a second support disk is coupled to the second end of each of the rods. | 08-01-2013 |
20130257189 | BALANCED ROTOR FOR A ROTATION MACHINE, AND METHOD FOR BALANCING A ROTOR - A balanced rotor and a method for balancing a rotor for a rotation machine are described, such as an electric motor. The rotor has at least one disk-shaped rotor body which has magnet elements in the region of an outer periphery. Furthermore, a plurality of recesses is formed outside the center in the rotor body. To balance the rotor body, a rivet such as in the form of a blind rivet or a Rivscrew® rivet, may be introduced and press-fit in one recess or in a plurality of these recesses. The rivet is introduced directly into the rotor body. An additional balancing ring disk may be dispensed with. This allows simple, cost-effective and reliable balancing of the rotor. | 10-03-2013 |
20130264896 | MOLDED STRUCTURAL BODY AND MOTOR HAVING SAME - A molded structural body is obtained by mold forming of a magnet coil wound on an iron core with the use of a molding resin containing at least a thermosetting resin, a thermoplastic resin incompatible with the thermosetting resin, and a metal hydrate having an electrical insulation property, wherein the molding resin has a thermal conductivity of 1.5 W/m·K or more and an excellent frame retardancy of UL94V-0. The molded structural body can achieve a small-size, thin, and high-power device with flame retardancy achieved, without containing any substances with high environmental burdens in the molding resin. | 10-10-2013 |
20130278087 | ROTOR ARRANGEMENT AND ELECTROMECHANICAL TRANSDUCER HAVING NON-PARALLEL PERMANENT MAGNETS - A rotor arrangement includes a support structure providing a mounting surface extending in an axial direction and a circumferential direction. The support structure is adapted to rotate around the axial direction. A first permanent magnet system is arranged at the mounting surface at a first circumferential region. A second permanent magnet system is arranged at the mounting surface at a second circumferential region. A circumferential distance between the first magnet system and the second magnet system at a first axial position differs from the circumferential distance between the first magnet system and the second magnet system at a second axial position. | 10-24-2013 |
20130285484 | ACTUATOR CASING - A casing configured for receiving a motor. The motor includes a shaft, two end plates substantially perpendicular to the shaft, and two bosses respectively protruding from the two end plates along the shaft. The casing includes two abutting plates. Each abutting plate includes an arcuate resisting surface that substantially faces the other abutting plate for abutting against a corresponding end plate. The distance between the two resisting surfaces increases from the middle thereof to the side thereof. Each abutting plate comprises a notch formed in an edge thereof and extending along the middle of the corresponding resisting surface for receiving a corresponding boss. | 10-31-2013 |
20130293039 | VIBRATION DAMPING FOR AN ELECTRIC DEVICE - The present invention relates to an electrical device including a stator and a rotor, wherein the electrical device is preferably a generator, a motor or similar, in particular a centrifuge motor, wherein the rotor, in particular a motor shaft is rotatably supported through at least one bearing relative to the stator, wherein at least one damping device is provided between the stator and the rotor, wherein the damping device includes at least one damping element. Thus, the device provides a high level of integrated vibration damping and internal damping of the device can be adapted to particular properties and applications. | 11-07-2013 |
20130320784 | SPINDLE MOTOR - A spindle motor having a turntable is disclosed, the spindle motor including a rotation shaft, a stator including a coil wound with a core arranged at a periphery of the rotation shaft, a rotor including a yoke coupled to the rotation shaft and a magnet arranged at an inner surface of the yoke, and a turn table coupled to the rotor and formed with a groove accommodating a ball, wherein a ratio (Yr/Bd) of a radius (Yr) between a center of the rotation shaft and an external surface of the yoke relative to a diameter (Bd) of the ball to reduce vibration of the rotor and the turn table is in the range of 4.6˜4.9. | 12-05-2013 |
20130328421 | APPARATUS FOR OSCILLATION-DECOUPLED MOUNTING OF AN ELECTRIC MOTOR, IN PARTICULAR A BLOWER MOTOR - It is known to mount an electric motor ( | 12-12-2013 |
20130334909 | MOTOR - Disclosed is a motor, the motor according to a first exemplary embodiment of the present disclosure including a housing, a stator mounted on the housing and including a stator core having a plurality of teeth, an insulator and a coil, a rotor rotatably installed at a center of the stator by a rotation shaft, and an insulation member wrapping an entire surface except for a surface opposite to the rotor of the stator, wherein the insulation member is arranged therein with an insulator and a coil. | 12-19-2013 |
20130342043 | PERMANENT MAGNET MACHINE WITH DIFFERENT POLE ARC ANGLES - An internal permanent magnet machine has multiple rotor sections, each section having multiple rotor laminations. Permanent magnets are placed asymmetrically in lamination openings to attenuate oscillations in torque caused by harmonic components of magnetic flux. Asymmetry is achieved by placing adjacent permanent magnets or magnet sets on the rotor periphery with different rotor magnetic pole arc angles. | 12-26-2013 |
20140009010 | DYNAMOELECTRIC MACHINE SUPPORT SYSTEM - Various embodiments of the disclosure include a dynamoelectric machine support system. In some embodiments, a support system for a dynamoelectric machine is disclosed, the support system having: a housing; a skeletal frame attached to the housing and at least partially contained within the housing; and at least one adjustment mechanism for applying a force to the skeletal frame to modify a stiffness of the skeletal frame. | 01-09-2014 |
20140009011 | DYNAMO-ELECTRIC MACHINE - Engaging protrusions of a lower end housing are axially snap-fitted into through holes, respectively, of a yoke housing to couple therebetween. Each of spacers is circumferentially placed between and is press-fitted between corresponding adjacent two of permanent magnets fixed to an inner peripheral surface of the yoke housing. Each spacer axially contacts a corresponding contact part of the end housing. A lower ball bearing and an upper ball bearing are supported by the lower end housing and an upper end housing, respectively, to rotatably support a shaft. A wave washer is axially positioned between the lower ball bearing and the lower end housing to exert an urging force between the lower end housing and the upper end housing through the shaft. | 01-09-2014 |
20140021810 | RESILIENT ROTOR ASSEMBLY FOR INTERIOR PERMANENT MAGNET MOTOR - An electric motor comprises a shaft, an interior magnet rotor core comprising a central bore and a pair of opposing ends faces, and at least one resilient structure inserted within the central bore between the pair of opposing end faces. The at least one resilient component is inserted within the central bore between the pair of opposing end faces such that the at least one resilient component does not extend beyond one of the opposing end faces. The resilient component comprises an outer rigid structure inserted within the central bore, a resilient component inserted within the outer rigid structure, and an inner rigid structure inserted within the resilient component, wherein the shaft is inserted through the inner rigid structure. | 01-23-2014 |
20140035403 | ELECTRIC MOTOR WITH BALANCE ADJUSTMENT MECHANISM FOR ROTOR AND MANUFACTURING PROCESS THEREOF - An electric motor includes an insert member situated within an insert bore formed in a rotor in order to adjust a balance of the rotor. The insert member has a body part provided with a cutout portion in a part of its circumference to define a gap extending therebetween. The insert member also has a pair of inner protrusions protruding radially inwardly from the opposite side edges of the gap. The size of the gap is determined such that the gap is not closed when the insert member elastically deforms and as a result, the outer diameter of the insert member becomes smaller than the diameter of the insert bore. | 02-06-2014 |
20140091649 | ELECTROMAGNETIC INTERFERENCE SHIELD AND BALANCE RING FOR ELECTRICAL MACHINE - An electrical machine including a stator and a rotor assembly. The rotor assembly defines a rotational axis and has a rotor core wherein the rotor core defines first and second axial end surfaces. A balance ring is rotationally fixed to the rotor assembly and is configured to rotationally balance the rotor assembly. The balance ring comprises an electrically conductive and magnetically permeable material and is disposed proximate the first axial end surface and defines an air gap disposed axially between the balance ring and the first axial end surface. In some embodiments, the electric machine includes a plurality of spacers extending between the first axial end surface and the balance ring. The rotor core and balance ring may comprise a plurality of stacked electrical steel laminations. The balance ring can be used to provide electromagnetic interference shielding for a resolver. A method of manufacturing an electric machine is also disclosed. | 04-03-2014 |
20140097711 | ONE PIECE ROTOR HUB/SHAFT FOR AN ELECTRIC MACHINE AND METHOD - A one piece rotor hub/shaft includes a hub portion having an outer annular surface, an axial end integrally formed with the outer annular surface, and a shaft section extends from, and is integrally formed with, the axial end. | 04-10-2014 |
20140103753 | HVAC Actuator Noise Reducer - An actuator noise reducer reduces the noise output of an HVAC actuator. The noise reducer has a spring arm with a sliding bearing surface which is pressed against a side of the rotating motor shaft. The spring arm introduces a generally radial force on the motor shaft, taking up bearing play and gently pressing the motor shaft into its bearing. A cylindrical hoop mount of the noise reducer mates with and encircles a cylindrical portion of the electrical motor adjacent the shaft for mounting the actuator noise reducer on the motor by axial sliding. | 04-17-2014 |
20140103754 | LAMINATED ROTOR BALANCING PROVISIONS - A laminated rotor and an electric machine including the laminated rotor are disclosed. In an embodiment, a rotor comprises a plurality of stacked laminations, wherein each lamination includes a plurality of radially extending slots arranged about a circumference of each of the plurality of laminations, and the plurality of radially extending slots in successive laminations in the stack are aligned. A stud member passes longitudinally through at least one hole in the lamination stack, and a plurality of coils are positioned within the plurality of slots. Fewer than all of the plurality of slots have a coil positioned therein, leaving at least three slots empty. Balance members may be placed in the slots that do not have a coil positioned therein to balance the rotor. | 04-17-2014 |
20140103755 | ELECTRIC MOTOR HAVING STATOR CORE FOR REDUCING COGGING TORQUE - An electric motor includes a stator having a core back which varies in width in a circumferential direction, and a rotor provided with permanent magnets. In the electric motor, cogging torque is generated M times during one revolution of the rotor, due to the number of magnetic poles of the rotor and the varied shape of the core back. The core back is provided with a step shift by an angle obtained by multiplying (360/M/2) degrees with an odd number. According to one embodiment, the core back may be provided with holes, concave portions or convex portions, so as to provide the core back with the step shift. | 04-17-2014 |
20140103756 | SELF-SUPPORTING HOUSING OF A DYNAMOELECTRIC MACHINE - A self-supporting housing of a laminated core of a stator in a dynamoelectric machine has a laminated core section surrounding the laminated core which is formed by axially stacked sheets and includes at least one pressure plate on its faces. The inside of the laminated core section is designed such that a laminated core having a basic shape of an octagonal cross-section can be accommodated in the laminated core section, wherein shorter sides and longer sides of the laminated core alternate in the peripheral direction; at least one connecting section in the axial extension of the laminated core section to dispose additional elements and/or devices on the housing. Contact zones are provided on the inside of the laminated core section to dispose and secure the laminated core in such a way that a gap is formed between the contact zones. | 04-17-2014 |
20140111039 | RADIAL MAGNETIC VIBRATION DAMPING APPARATUS, BEARING SUPPORT ASSEMBLIES, AND OPERATIONAL METHODS - A bearing support assembly adapted to support and damp radial vibration of a rotor shaft of a vertical motor is disclosed. The bearing support assembly has a thrust bearing adapted to couple to a rotor shaft and carry axial thrust loads along an axial axis, and a radial magnetic damping apparatus having one or more magnetic field-producing members adapted to provide a radially-acting magnetic force to act upon the rotor shaft to reduce radial vibration thereof. Vertical motors and methods of operating the vertical motors are disclosed, as are other aspects. | 04-24-2014 |
20140111040 | BRUSHED ROTATORY DEVICE - A brushed rotatory device ( | 04-24-2014 |
20140117792 | ROTOR AND ROTATING ELECTRIC MACHINE HAVING THE SAME - A rotor for a rotating electric machine has a core body and a magnet. The core body has a through-hole, a first polar portion, and a second polar portion. The first polar portion and the second polar portion are alternately arranged in the circumference direction. The magnet is disposed on the core body at a position corresponding to the first polar portion or the second polar portion. The through-hole has an arc-shaped surface having a first curvature radius. The first polar portion has an arc-shaped surface having a second curvature radius. The second polar portion has an arc-shaped surface having a third curvature radius. The first curvature radius is larger than or equal to the second curvature radius. | 05-01-2014 |
20140125160 | CLAW POLE TYPE MOTOR - A claw pole type motor is provided and includes: a rotor which includes a magnet and a rotation shaft around which the magnet is attached; and a stator which includes a bobbin, a winding wound around the bobbin, and a yoke which includes a plurality of pole teeth disposed to oppose the magnet and which is located outside the winding, wherein a vibration suppressing means is provided which makes contact with a distal end portion of the pole tooth and by which the pole tooth is pressure-supported on an inner circumferential surface of the bobbin, whereby the pole tooth is suppressed from vibrating. | 05-08-2014 |
20140145525 | REDUCED COGGING TORQUE PERMANENT MAGNET MACHINE - An electric machine is formed by a stator and a rotor that is free to rotate about an axis of rotation. The stator may have teeth projecting from a body portion and that define slots for housing electrical windings. The rotor may have a rotor core and a number of magnets supported on a peripheral face of the rotor in substantially contiguous arrangement and of alternating magnetization. The rotor magnets are shaped so that pairs of adjacent magnets oppose one another along magnetic boundary lines that are skewed relative to the slots formed in the body portion of the stator. For example, the shape of the rotor magnets may be arcuate trapezoidal or parallelogramatic. In this configuration, cogging torque experienced by the rotor during operation of the electric machine may be reduced. | 05-29-2014 |
20140175913 | SPINDLE MOTOR - A spindle motor includes a stator including a base member having a stator core installed thereon; and a rotor including a rotor hub in which a driving magnet facing the stator core is installed. The rotor hub includes a disk-shaped body, a magnet mounting part extended from edge of the body in a downward axial direction and having the driving magnet installed on an inner surface thereof, and a disk support part extended from the magnet mounting part in radial direction. A magnetic center of the driving magnet is higher than that of the stator core in the axial direction in order to generate force directed in the downward axial direction through interaction with the stator core. The magnet mounting part includes a vortex generation suppressing part disposed on a lower edge portion thereof to decrease noise and vibrations generated by flow of air during rotation of the rotor hub. | 06-26-2014 |
20140175914 | MOTOR - A motor, including: a motor body, the motor body including two ends; a damping ring, the damping ring including a bottom; a mounting bracket; a locking device; a control box; and a connection housing, the connection housing including two ends, and a sidewall. The damping ring is disposed on each end of the motor body. The bottom of the damping ring is supported by the mounting bracket. The damping ring is fixed on the mounting bracket by the locking device. One end of the connection housing is connected to a bottom of the motor body; the other end of the connection housing is connected to a top of the control box. A plurality of heat dissipation holes is arranged on the sidewall of the connection housing. | 06-26-2014 |
20140175915 | MOTOR OF OUTER ROTOR TYPE - Disclosed herein is a motor of an outer rotor type, including: a shaft; a bearing assembly rotatably supporting the shaft; a stator portion disposed at an outer side of the bearing assembly; a rotor portion including a cylindrical back yoke and a magnet disposed at an inner circumferential surface of the back yoke and disposed at a predetermined interval from the stator portion; and a fan assembly including a cylindrical hub fixing the shaft and a plurality of blades extending radially on an outer circumferential surface of the hub, wherein the inner circumferential surface of the back yoke is formed in an embossed shape using a plurality of arcs to form a space portion between the back yoke and the magnet. | 06-26-2014 |
20140239752 | Stepper Motor Rotor with Internal Damper - A rotor for an electric motor with improved oscillation settling characteristics has a shaft rotatable about a longitudinal axis, a rotor section, disposed on the shaft for rotation together with the shaft, and, in certain arrangements, a permanent magnet disposed adjacent to the rotor section for rotation together with the shaft. The rotor section defines a recess around the shaft, extending from an end of the rotor section axially toward the opposite end of the rotor section, or the permanent magnet, if it is provided, and at least one mass is secured to the rotor section within the recess by a layer of deformable damping material, such as a dielectric gel. The rotor is particularly appropriate for use in a hybrid stepper motor, a variable reluctance motor, or a permanent magnet brushless motor, and a process of assembling the rotor is also referred to. | 08-28-2014 |
20140252892 | ROTOR FOR AN ELECTRICAL MACHINE AND RELATIVE ASSEMBLY METHOD - A rotor for an electrical machine includes a laminated core having a main axis and a plurality of poles delimiting a plurality of radial seats extending along the main axis, each seat being delimited by a first and a second pole. The rotor includes a plurality of magnets inserted in the seats and a plurality of springs locking the magnets in the seats; the springs acting between each magnet and the first pole delimiting the relative seat for pushing each magnet towards the second pole delimiting the same seat. | 09-11-2014 |
20140265653 | AXIAL FLUX ELECTRIC MACHINE AND METHODS OF ASSEMBLING THE SAME - In one aspect, a three-phase axial flux stator is provided. The stator includes a plurality of stator modules oriented in an axial direction, and each of the stator modules includes a pair of teeth connected by a yoke section. The stator also includes a plurality of windings, each of the windings wound around one of the stator modules. The stator modules and the windings produce a three-phase flux in an axial direction. | 09-18-2014 |
20140361646 | Rotating Electric Machine and Vehicle Equipped with Rotating Electric Machine - A rotating electric machine, in which a cross conductors of a stator connect slot conductors so as to stride N+1 slots at coil ends on one side and stride N−1 slots at coil ends on another side, with N representing a number of slots per pole, a stator winding includes a plurality of slot conductor groups each made up with a plurality of slot conductors corresponding to a single phase, the plurality of slot conductors in each slot conductor group are inserted at a predetermined number Ns of successive slots forming a continuous range along a circumference of the stator core so that the slot conductors in the slot conductor group take successive slot positions and successive layer positions, Ns=NSPP+NL when NSPP represents a number of slots per pole per phase and a number of layers is expressed as 2×NL. | 12-11-2014 |
20150022034 | GENERATOR ASSEMBLY FOR HIGH AXIAL VIBRATION INPUT - A generator assembly may include a bearing liner and a bearing retainer configured to reduce vibration response in a bearing assembly under high frequency operation of a rotor. The bearing liner may be configured to provide a clearance between the bearing assembly and an adjacent housing/bearing liner to prevent high vibration output from the bearing assembly on for example, the rotor shaft. The bearing retainer may include a recess to accommodate axial movement of the bearing assembly in response to rotation of the rotor. In some embodiments, the bearing retainer may include a dampener to dampen contact of the bearing assembly with the retainer. | 01-22-2015 |
20150048698 | COMPONENT CONFIGURED TO STIFFEN AN ELECTRIC MOTOR ASSEMBLY - An apparatus includes a first component and a second component. The second component is located at a first position. The second component includes a first connection to the first component. The first position and the first connection are configured to stiffen an electric motor assembly. | 02-19-2015 |
20150061420 | MOTOR - A motor includes a housing having a ring-shaped protruding portion protruding from a lower surface thereof. A stator core is fixed to an inner circumferential surface of the housing and on which a coil is wound, and an insulator is provided between the stator core and the coil. A lower end of the insulator is in contact with the protruding portion. Vibration and noise generated from the housing may be reduced without changing a material or a thickness of the housing. | 03-05-2015 |
20150076937 | ELECTRIC DRIVE - An electric drive contains an electric motor for generating a driving force and a transmission for transmitting the driving force. The electric motor has a motor housing, a rotor arranged in the motor housing, and a motor shaft which bears the rotor. The transmission has at least two transmission elements which are coupled in terms of the transmission of force. The electric drive furthermore contains a drive housing for accommodating the electric motor and the transmission. Moreover, the motor shaft is mounted by at least a first radial bearing and a second radial bearing and braced transverse to its axis of rotation. The second radial bearing being arranged radially offset to the axis of rotation. | 03-19-2015 |
20150076938 | ELECTROMOTIVE DRIVE, IN PARTICULAR BLOWER DRIVE - An electromotive drive being a commutator motor has a motor shaft being rotatably mounted on axially opposite sides in shaft bearings which are each covered by an end plate. A damping system for damping sound is arranged on that bearing side, which is averted from the end plate, of at least one of the shaft bearings. The damping system has an annular sealing disk and an annular sliding disk with an integrated spring element. | 03-19-2015 |
20150084452 | INTERIOR PERMANENT MAGNET MACHINE WITH POLE-TO-POLE ASYMMETRY OF ROTOR SLOT PLACEMENT - An interior permanent magnet machine includes a rotor having a plurality of slots. First and second slots are disposed in a first pole and the third and fourth slots are disposed in a second pole. A first angle is defined between respective centerlines of the first and second slots. A second angle is defined between respective centerlines of the third and fourth slots. The first angle is configured to be sufficiently different from the second angle so that torque ripple is reduced. Thus the rotor is configured such that the angular configuration of slots in a first pole is different from the angular configuration of slots in a second pole of the rotor. | 03-26-2015 |
20150115750 | PM STEPPING MOTOR - A PM stepping motor includes a two-phase stator which includes first and stator stators, and a rotor which is rotatably supported inside the two-phase stator. Each of the first and second stators includes an outer yoke, an inner yoke and a coil. Each of the first and second stators is formed with a convex portion and a concave portion. The convex portion formed on the inner yoke of the first stator is engaged with the concave portion formed on the inner yoke of the second stator. The inner yoke is formed with two protrusions engaged with a cutout of the outer yoke. The convex portion and the concave portion are arranged line-symmetrically with respect to a center line passing through a center point of the inner yoke and a center position between the two protrusions, and an angle θ between each position and the center line ranges 30°<θ<90°. | 04-30-2015 |
20150130301 | ACTUATOR - An actuator includes an electric motor having a shaft, an output member coupled to the shaft, a casing having a wall, a mounting structure, and a tubular body sleeved around the shaft and coupling the mounting structure to the wall. The motor is mounted to the casing via the mounting structure. | 05-14-2015 |
20150137629 | LOW COST PERMANENT MAGNET MOTOR FOR AN ELECTRIC POWER STEERING SYSTEM - A rotor includes an inner wall and an outer wall, where the inner wall forms a space and is radially centered along a central longitudinal axis of the rotor. The rotor further includes a first magnetic pair of legs corresponding to a first pole. The first leg and a second leg of the first magnetic pair of legs are disposed within the rotor, and a first angular distance between the first leg and the second leg decreases from the outer wall to the inner wall. A second magnetic pair of legs corresponding to a second pole that differs from the first pole, a third leg and a fourth leg of the second magnetic pair of legs being disposed within the rotor to extend radially inward from the outer wall toward the inner wall, a second angular distance between the third leg and the fourth leg decreases from the outer wall to the inner wall. | 05-21-2015 |
20150145354 | TURBO-GENERATOR STATOR CORE SUSPENSION - Embodiments of the invention relate generally to turbo-generators and, more particularly, to suspension systems for turbo-generators and the attenuation of vibration in a stator core induced by an electromagnetic load. In one embodiment, the invention provides a support clamp comprising: an arcuate body; a first affixation point; a second affixation point; and a securing point between the first and second affixation points, wherein each of the first and second affixation points includes a radially-oriented opening extending from an inner surface to an outer surface and the securing point includes an area adjacent to an angled opening extending from a first surface to a second surface, each of the first and second surfaces lying substantially perpendicular to the inner and outer surfaces of the arcuate body. | 05-28-2015 |
20150303754 | Stator for Rotating Electric Machine - A new rotor for a rotating electric machine assuring outstanding durability and reliability against vibration and facilitating equalization of resistances among a plurality of rotor coils, while allowing the leading ends of a plurality of lead wires to be disposed so as to congregate in one area, is provided. A plurality of stator coils | 10-22-2015 |
20150311769 | INNER-ROTOR BRUSHLESS MOTOR - A rotor portion includes an upper cylindrical portion and a lower cylindrical portion, each of which is configured to rotate together with a rotor. A stator portion includes a circuit board including a rotation detection portion located thereon. The lower cylindrical portion includes a lower balance correction portion. The upper cylindrical portion includes an upper balance correction portion. In addition, a detectable portion configured to be detected by the rotation detection portion is provided on the upper cylindrical portion. | 10-29-2015 |
20150333592 | Motor of a Ceiling Fan - A motor of a ceiling fan includes: a shaft having two shoulder surfaces facing in opposite axial directions of the shaft, with the shaft coupling with a stator; a bearing sleeve receiving two bearings for supporting the shaft, with an annular flange formed at an end of the bearing sleeve, wherein the annular flange and one of the shoulder surfaces of the shaft clamp and position one of the bearings; and a rotor having a housing coupling with the bearing sleeve, with the housing having a connecting portion, wherein the connecting portion and the other one of the shoulder surfaces of the shaft clamp and position the other one of the bearings. | 11-19-2015 |
20150357871 | MOTOR ASSEMBLY AND METHOD FOR PROVIDING THE SAME - A motor assembly having an internal channel passing an interior of a rotor, and a method for producing the same are provided. The motor assembly includes an adhesive flowing along the internal channel, and the rotor can be firmly coupled and improving durability and production efficiency of the rotor. | 12-10-2015 |
20150357879 | Rotor Assembly For An Electric Machine And Method For Producing A Rotor Assembly - A rotor assembly for an electric machine includes a rotor having an axis of rotation extending in an axial direction of the rotor and at least one first hole extending parallel to the axis of rotation and radially spaced from the axis of rotation by a first radial distance, and at least one first balancing element for compensating an unbalance of the rotor in rotation about the axis of rotation. The at least one first balancing element can be provided in the at least one first hole and can be fastened in the at least one first hole by means of a press fitting connection between the at least one first hole and the at least one first balancing element. Thus, a simple and economical possibility of balancing the rotor is provided. | 12-10-2015 |
20150364966 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes an annular stator, a motor case in which the stator is accommodated, and an annular inner frame with which one axial end of the stator is supported on the motor casing. The inner frame includes a bolt fastening portion, which couples the stator at a radially outer side, and a bolt fastening portion, which couples the motor case at a radially inner side. At a connecting portion between the first coupling portion and the second coupling portion, the radial rigidity is lower than the circumferential rigidity. | 12-17-2015 |
20150381011 | ELECTRIC MOTOR AND METHOD OF MAKING THE SAME - An electric motor includes a stator and a rotor rotatably mounted to the stator. The stator includes a housing having an open end, a plurality of adhesive strips applied on an inner surface of the housing, a plurality of magnets bonded to the inner surface of the housing by the adhesive strips, and an end cap assembly mounted to the opening end of the housing. The adhesive covers at least 70% of the area of the outer surface of each magnet after the magnets are assembled to the housing. | 12-31-2015 |
20160036292 | PART FOR UNCOUPLING A MOTOR AND THE MOUNTING THEREOF AND ASSEMBLY OF A MOTOR ONTO THE MOUNTING THEREOF HAVING SUCH AN UNCOUPLING PART BUILT THEREIN - The invention mainly relates to a part for uncoupling a motor and the mounting thereof, which is characterized in that it comprises a rigid connecting part ( | 02-04-2016 |
20160056684 | Rotating Electric Machine and Electrically Driven Vehicle - A rotating electric machine allowing a rotor and a stator thereof to assume any of various numbers of poles and any of various numbers of slots and enabling a reduction in vibration and noise is provided. The rotating electric machine according to the present invention includes a stator having a plurality of teeth and a plurality of slots, which is configured so that the shape of the front ends of the teeth and the opening width of the slots are made to change cyclically F times along the circumferential direction (F is a natural number equal to or greater than 2). | 02-25-2016 |
20160072366 | DRIVE APPARATUS AND ROBOT DEVICE - A drive apparatus includes a motor having a drive part that rotates a first shaft member; a transmission part that transmits rotation of the first shaft member to a second shaft member which is different from the first shaft member; a first detection device provided at the first shaft member to detect information regarding rotation of the drive part; a second detection device provided at the second shaft member to detect information regarding rotation of the transmission part; and a prevention part that prevents movement of foreign substance toward a detection part which includes at least one of the first detection device and the second detection device. | 03-10-2016 |
20160099629 | ROTOR INCLUDING BALANCER WEIGHT AND MOTOR - A rotor capable of fixing a balancer weight by an easier method. The rotor includes a shaft; a core having a core hole penetrating the core in an axial direction; a rod configured to be inserted into the core hole so as to protrude from one end surface of the core in the axial direction to the one side in the axial direction; a balancer weight having a weight hole and placed on the end surface with the rod inserted into the weight hole; and a fixing member having a fixing hole and coming into contact with the balancer weight from the one side in the axial direction with the rod inserted into the fixing hole to fix the balancer weight by sandwiching the balancer weight with the end surface. | 04-07-2016 |
20160105062 | MOTOR | 04-14-2016 |
20160111935 | ELECTRICAL MACHINE PROVIDED WITH A DAMPER IN ORDER TO RESIST VIBRATORY STRESSES MECHANICALLY, AND CORRESPONDING DAMPER - An electrical rotating machine comprising a stator ( | 04-21-2016 |
20160141936 | MOTOR ASSEMBLY FOR POWER STEERING ASSEMBLY - In one aspect of the invention, a motor assembly for an electric power steering assembly is provided. The motor assembly includes a motor housing, a stator, and a hollow rotor defining an inner cavity, the rotor configured for rotational movement within the motor housing. The motor assembly further includes a worm shaft having a first end and a second end, and a motor coupling positioned within the inner cavity and coupled to the rotor for rotational movement therewith. The worm shaft first end is coupled to the motor coupling for rotational movement therewith. | 05-19-2016 |
20160149465 | MOTOR - A motor includes: an end bell mounted on an opening of a cylindrical rotor housing for housing a rotor and is provided with a power-feeding path to the rotor; and a choke coil connected in the middle of the power-feeding path. The choke coil overlaps at least a part of the rotor housing as viewed from outside the rotor housing in a radial direction and as viewed in a direction perpendicular to an axial direction, and is arranged such that a longitudinal direction thereof extends along a direction parallel to a rotating shaft of the motor. | 05-26-2016 |
20160164369 | MOTOR MOUNTING DEVICE - A motor mounting device having a motor adapter that is formed substantially ring-shaped or pot-shaped and is used to receive a motor, and having a motor mount, which is used to hold the motor adapter, whereby elastic damping elements are disposed between the motor adapter and the motor mount, whereby the damping elements are formed as extruded profiles. | 06-09-2016 |
20160190895 | Motor - A motor includes a motor housing, a motor body, and a damping member. The motor body includes a drive shaft. The motor body is housed in the motor housing. The damping member is disposed on an outer surface of the motor housing. The damping member includes a damping layer and a constraining layer. The damping layer is made of an organic polymeric material, and bonded to the outer surface of the motor housing. The constraining layer is made of at least one of a resin mixed with an inorganic compound and an elastomer mixed with an inorganic compound. The constraining layer is disposed on the damping layer. | 06-30-2016 |
20160380505 | ELECTRODYNAMIC MACHINES, AND METHOD FOR REDUCING VIBRATION OF AN ELECTRODYNAMIC MACHINE - An electrodynamic machine includes a rotor assembly, a stator assembly defining an annular core receiving the rotor assembly, the rotor assembly rotating within the stator assembly based on electromagnetic fields generated by the stator assembly and the rotor assembly, a plurality of structural components mechanically supporting the rotor assembly and stator assembly, and an active damping element providing forced vibrations that counteract structural vibrations of the electrodynamic machine caused by magnetic forces based upon the electromagnetic fields or caused by mechanical forces based upon the plurality of structural components. | 12-29-2016 |
20160380506 | DAMPER - A damper damping motion of a first object relative to a second object, the damper including: a casing including a conductor; plurality of magnetic elements serially in a first direction within the casing and each including at least one magnet so adjacent magnetic elements repel in the first direction; at least one magnetic element is moveable relative to other magnetic elements within and relative the casing; the conductor allows movement of at least one moveable magnetic element relative to the casing induces current in the conductor, the magnetic field produced by current providing a braking force to the moving magnetic element; at least one moveable magnetic elements includes a first connecting part and either casing or at least one other magnetic element includes a second connecting part, one connecting part for connecting the damper to the first object, and other connecting part for connecting the damper to the second object. | 12-29-2016 |