Patent application number | Description | Published |
20090250287 | ELECTRIC MOTOR APPARATUS FOR ELECTRIC POWER STEERING AND ELECTRIC POWER STEERING APPARATUS - An electric motor and a control unit are integrally formed and are placed coaxially with a shaft of a gear box for reducing a speed of rotation of the electric motor and also the control unit is placed between the gear box and the electric motor, and a power feeding part of the electric motor is bonded to a bonding part of the control unit inside a housing or a case through an opening part disposed in the housing and/or the case | 10-08-2009 |
20090251023 | PERMANENT MAGNET ROTATING ELECTRIC MACHINE AND ELECTRIC POWER STEERING DEVICE USING THE SAME - A permanent magnet rotating electric machine includes: a stator including: a stator core having teeth, and an armature winding wound around each of the teeth to configure the multiple phases; and a rotor including a rotor core, and permanent magnets provided in order around the rotor core. The rotor is arranged to be spaced apart from the stator with an air gap therebetween. Each of the permanent magnets has a curved surface opposed to the stator and is configured to satisfy the following relationship: | 10-08-2009 |
20090251030 | MOTOR FOR CONTROLLER INTEGRATED ELECTRIC POWER STEERING APPARATUS AND ELECTRIC POWER STEERING APPARATUS - An apparatus is provided for obtaining a compact and inexpensive motor for controller integrated electric power steering apparatus capable of reducing a component for connection and the number of man-hours of assembly, and an electric power steering apparatus. A driving substrate having a power element is arranged in the side of a speed reduction mechanism of the inside of a case of a controller and a control substrate for controlling driving of the driving substrate is arranged in the side of a motor of the inside of the case and a resolver and a lead frame comprising connection wiring are arranged between a motor shaft direction of the control substrate and the driving substrate and an input-output terminal of the resolver is electrically connected to the control substrate. It is placed substantially coaxially in order of a motor, the controller and a speed reduction mechanism in the motor shaft direction. | 10-08-2009 |
20100018032 | Rotor of Rotating Electrical Machine and Manufacturing Method Therefor - A rotor of a rotating electrical machine is provided in which neither deterioration nor fluctuation in the cogging torque is caused and that causes neither physical enlargement nor cost increase. The rotor of a rotating electrical machine, provided with a plurality of magnetic poles | 01-28-2010 |
20110074400 | ROTATION ANGLE DETECTING DEVICE - Provided is a rotation angle detecting device with high detection accuracy, which can be structured with a small number of teeth even if a shaft angle multiplier increases, thus enhancing winding workability and becoming suitable for mass production. The rotation angle detecting device includes: a stator formed of an iron core with teeth, the stator including: an exciting winding of one phase or more; and output windings of two phases or more; and a rotor with a salient pole, in which numbers of turns of the output windings of the two phases each have a value obtained by a function containing a sum or a difference between a sine wave of an order equal to an absolute value of a sum of a number of the salient poles and a number of the pole pairs, and a sine wave of an order equal to an integer that is different from an absolute value of the number of the pole pairs of the exciting winding and different from an absolute value of a difference obtained by subtracting the number of the salient poles from the number of the pole pairs. | 03-31-2011 |
20120139372 | PERMANENT MAGNET ROTATING ELECTRICAL MACHINE AND ELECTRIC POWER STEERING APPARATUS USING THE SAME - A compact, light permanent magnet motor with low torque pulsations is obtained by reducing a cogging torque resulting from variations at the end of a rotor, such as an error in attachment position and a variation in magnet characteristic of the permanent magnets. | 06-07-2012 |
20130221776 | ELECTRIC POWER STEERING ELECTRIC MOTOR APPARATUS AND ELECTRIC POWER STEERING APPARATUS - An electric power steering electric motor apparatus includes: an electric motor including: a motor housing; a stator; a rotor; and a power supplying portion that supplies electric power to the stator; and a controlling unit including a driving circuit that supplies electric power to the electric motor; a connecting portion; a controlling circuit; and a case that covers the driving circuit and the controlling circuit, the electric motor and the controlling unit being mounted coaxially onto a gear housing that reduces rotational speed of the electric motor so as to position the controlling unit on a side near the gear housing, and the connecting portion being connected to the power supplying portion inside the case through an opening portion formed on the case, and being positioned and held by an insulating member so as to be insulated from the case and the motor housing. | 08-29-2013 |
20130257185 | ROTARY ELECTRIC MACHINE - A rotary electric machine according to the present invention is a rotary electric machine including: a heat sink mounted with a power circuit; a housing for containing incorporated components; and a frame for containing a rotor and a stator core; the heat sink, the housing, and the frame being coaxially and integrally configured. In the rotary electric machine, there are included a lead frame connected to a power circuit, and a connector portion connected to the lead frame and being for connecting to the outside; the heat sink is made of metal; and the housing is made of resin. | 10-03-2013 |
20130300222 | MOTOR DRIVE DEVICE FOR ELECTRIC POWER STEERING APPARATUS - A motor drive device employed, for example, in an electric power steering apparatus for vehicle, achieves a reduction not only in size but also in vibration and noise at the same time. | 11-14-2013 |
20140145548 | MOTOR - A material of the stator core is different from a material of the housings, in a state where one end portion in the axis direction of the stator core is contacted to the first housing, and the other end portion in the axis direction of the stator core is contacted to the second housing; and a neighboring portion of a contact portion, at which the first housing is contacted to the stator core, and another neighboring portion of a contact portion, at which the second housing is contacted to the stator core, are connected by a connecting component in the axis direction, of which material is the same as a material of the stator core, whereby the first housing and the second housing are connected each other; and the first housing and the second housing face each other in a state where a gap intervenes between both housings. | 05-29-2014 |
20140239765 | PERMANENT MAGNET SYNCHRONOUS MOTOR HAVING A LOW DEMAGNETIZATION FACTOR - To obtain a permanent magnet synchronous motor suitable for an electric power steering system, in which the magnet thickness (magnet used amount) can be reduced while securing demagnetization resistance and torque characteristics. In a permanent magnet synchronous motor including a rotor in which plural permanent magnets are arranged at an outer periphery of a rotor core, which is supported so as to rotate freely, and a stator provided at the outside of the stator and having stator windings | 08-28-2014 |
20140346910 | PERMANENT MAGNET TYPE CONCENTRATED WINDING MOTOR - In a permanent magnet type concentrated winding motor, the number of magnetic poles is M, a stator Sr has an N number of teeth T around which coils are concentratedly wound and which are circumferentially arranged at equal intervals, M is equal to (18±4)n and N is equal to 18n, an armature winding AW has an m number of parallel circuits, and a 1-phase circuit of the parallel circuits is configured to have a 6n/m number of coils connected in series with each other. | 11-27-2014 |
Patent application number | Description | Published |
20090102304 | ROTOR OF ROTATING ELECTRICAL MACHINE AND MANUFACTURING METHOD THERE FOR - A rotor of a rotating electrical machine is provided in which neither deterioration nor fluctuation in the cogging torque is caused and that causes neither physical enlargement nor cost increase. The rotor of a rotating electrical machine, provided with a plurality of magnetic poles | 04-23-2009 |
20090195104 | PERMANENT MAGNET SYNCHRONOUS MOTOR - To obtain a permanent magnet synchronous motor suitable for an electric power steering system, in which the magnet thickness (magnet used amount) can be reduced while securing demagnetization resistance and torque characteristics. In a permanent magnet synchronous motor including a rotor in which plural permanent magnets are arranged at an outer periphery of a rotor core, which is supported so as to rotate freely, and a stator provided at the outside of the stator and having stator windings | 08-06-2009 |
20100244605 | PERMANENT MAGNET TYPE ROTATING ELECTRICAL MACHINE AND ELECTRIC POWER STEERING DEVICE - A permanent magnet type rotating electric machine includes: a rotor including a rotor core having a polygonal shape and a plurality of permanent magnets; and a stator including a stator core and armature windings, in which, when the number of poles is M, the number of slots is N, M permanent magnets are sequentially numbered from first to M-th in a circumferential direction, and a positional shift amount in the circumferential direction from a corresponding one of equiangularly arranged reference positions, each being at the same radial distance from a center of a rotating shaft, for an i-th (i=1, 2, . . . , M) permanent magnet is h | 09-30-2010 |
20100244607 | ROTOR OF ROTARY ELECTRIC MACHINE AND METHOD OF MANUFACTURING THE SAME - In a rotor of a permanent magnet rotary electric machine, a bonding portion between each of segment shaped magnets and an outer circumference face of a rotor core is provided in axial symmetry with respect to the rotor axial center and has a bonding area equal to or larger than a half of a contact area between each of the segment shaped magnets and the outer circumference face of the rotor core; and a biasing force is applied to an outer circumference face of the segment shaped magnets by a ring. | 09-30-2010 |
20100244611 | PERMANENT-MAGNETIC TYPE ROTARY ELECTRIC MACHINE - A permanent-magnetic type rotary electric machine includes a stator having teeth that are arranged in the peripheral direction thereof and around which armature windings of plural phases are wound, and a rotor having plural permanent magnets arranged so that the poles of the permanent magnets are alternately different in the peripheral direction thereof, higher harmonic waves being contained in a no-load induced voltage waveform. A (6 | 09-30-2010 |
20100288577 | MOTOR FOR ELECTRIC POWER STEERING DEVICE WITH INTEGRATED CONTROLLER AND ELECTRIC POWER STEERING DEVICE - A motor for an electric power steering device with an integrated controller ( | 11-18-2010 |
20110278995 | MOTOR FOR AN ELECTRIC POWER STEERING APPARATUS - Provided is a motor for an electric power steering apparatus, in which vibrations and noises are suppressed. The motor for an electric power steering apparatus includes: a motor section ( | 11-17-2011 |
20120313474 | ROTOR OF ROTARY ELECTRIC MACHINE - A rotor of a rotary electric machine according to the present invention includes: a rotor core arranged on the outer circumferential side of a rotor shaft; and a plurality of magnetic poles fixed to the rotor core and circumferentially arranged on the rotor core, the rotor including a non-magnetic ring attached by insertion to the outer circumference of the plurality of the magnetic poles and having a substantially polygonal shape in outer circumferential shape. The non-magnetic ring is configured such that the inner circumferential length L of the non-magnetic ring before assembly with respect to the length of an envelope L | 12-13-2012 |
20130140964 | MOTOR FOR ELECTRIC POWER STEERING DEVICE - A motor for an electric power steering device, includes: a housing side bearing which is placed on the output side of a shaft of a rotor placed in a frame, and is supported by a housing connected to the frame; and a frame side bearing which is placed on the opposite output side of the shaft of the rotor, and is composed of an outer ring and an inner ring supported by the frame. The motor is controlled by an electronic control unit which is coaxially placed with the rotor, the motor including: a bearing box which supports the frame side bearing, and is formed with a closed end section between the closed end section and the side of the frame side bearing; an axial elastic body which is placed on the closed end section of the bearing box, and applies a preload in an axial direction to the outer ring of the frame side bearing; and a radial elastic body which is placed on the outer circumferential side of the outer ring of the frame side bearing, and applies a preload in a direction perpendicular to the axial direction. | 06-06-2013 |
20130154436 | PERMANENT MAGNET TYPE ROTARY ELECTRIC MACHINE AND ELECTRIC POWER STEERING APPARATUS USING THE SAME - Not less than two regions different in magnetic circuit design are provided in a rotational axis direction of the rotor ( | 06-20-2013 |
20130187510 | ROTARY ELECTRIC MACHINE - A coil is configured so that: N conductor wires of wave windings each divided at at least two positions in a circumferential direction are provided in one of a plurality of slots; within a unit of the divided wave windings in which conduction is made, the N conductor wires are connected in one of series and parallel to each other at division positions located at substantially the same circumferential position of conductor-wire end portions; division units of the divided wave windings are connected in series to each other, and a total number of series turns of the series-connected division units of the each phase is a predetermined number of series turns, which does not exceed an upper limit value of a terminal voltage of the rotary electric machine; and the series-connected division units of the each phase have the same total number of series turns. | 07-25-2013 |
20130234555 | ROTARY ELECTRIC MACHINE - Provided is a rotary electric machine, including: a stator; and a rotor provided on the stator so as to be rotatable about a rotation shaft, in which the rotor includes, at an outer circumference thereof, magnetic poles arranged so as to have different polarities alternately, the magnetic poles being formed of a rotor core in which electromagnetic steel plates are stacked, the magnetic poles being excited by permanent magnets which are housed in gaps disposed at an outer circumferential part of the rotor core, and in which the rotor core includes, at an inner circumferential part thereof, in the same stack plane: a short circuit magnetic path connecting magnetic pole pieces which form the magnetic poles; and a protruding portion held in contact with the permanent magnets, which is positioned between magnetic pole pieces which are not connected to the short circuit magnetic path. | 09-12-2013 |
20130300235 | ROTATING ELECTRICAL MACHINE INCORPORATING DRIVE DEVICE - There is provided a drive-device-integrated rotating electrical machine, in which a radially protruding portion ( | 11-14-2013 |
20140028130 | ROTARY ELECTRIC MACHINE AND METHOD OF MANUFACTURING THE SAME - A rotary electric machine according to the present invention includes a stator having a connection member forming a three phase delta connection by coil windings. In the rotary electric machine, the connection member is composed of an insulating annular groove portion formed with double annular grooves and a first, a second, and a third annular conductive members, the annular conductive members being attached by insertion into the insulating annular groove portion; the insulating annular groove portion is formed with double grooves of one and the other, and both the grooves are connected via one window portion; the respective annular conductive members are each formed in a circular arc shape and provided with a plurality of arm portions extended outward in the radial direction of the stator, the plurality of arm portions being connected to coil end portions of the coil windings respectively; the first annular conductive member and the second annular conductive member are attached by insertion into different grooves of the insulating annular groove portion, are overlapped at a part of opened sections where a circular arc is not present, are in a positional relationship in which both annular conductive members are opened, and are attached by insertion so that the window portion is disposed at the position where both annular conductive members are opened; and the third annular conductive member is made such that a portion to be attached by insertion into one groove and a portion to be attached by insertion into the other groove are attached by insertion into the insulating annular groove portion via the window portion. | 01-30-2014 |
20140145547 | PERMANENT MAGNET MOTOR - Provided is a permanent magnet motor that realizes reduction of both cogging torque and torque ripple, and also downsizing and weight reduction together with torque ripple reduction. When two sets of three-phase armature windings are defined such that a first armature winding | 05-29-2014 |
20140191628 | PERMANENT MAGNET MOTOR - A permanent magnet motor in which electromagnetic excitation force of low spatial order is reduced, and influence of a magnetomotive force harmonic of a rotor and torque ripple is reduced. One set of armature windings receives current from a first inverter, and another set of armature windings receives current from a second inverter. Where a pole number of a rotor is M and the number of slots of a stator core is Q, M and Q satisfy M07-10-2014 |
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20140340015 | BRUSHLESS MOTOR, EXTERNAL AC VOLTAGE SOURCE, AND ELECTRIC POWER STEERING DEVICE - The present invention provides a brushless motor in which the voltage utilization ratio can be increased and the torque and output of the motor can thereby be increased, and also provides a drive method for a brushless motor. The brushless motor includes an armature constituted by an armature core having armature windings of a plurality of phases, and a field pole constituted by a field pole core having a plurality of permanent magnets. A voltage, in which at least a 5th order harmonic component is superimposed on a 1st order fundamental wave of a voltage under predetermined phase difference condition and amplitude condition in order to increase a 1st order fundamental wave peak of the applied voltage over an applied voltage peak, is applied to the armature windings. | 11-20-2014 |