Class / Patent application number | Description | Number of patent applications / Date published |
310216069 | Having slot of particular shape | 36 |
20090218906 | ROTATING ELECTRIC MACHINE AND METHOD OF MANUFACTURING THE SAME - A rotational electric machine has a stator including stator windings and a stator core having teeth defining slots in which stator coils of the stator windings can be inserted in a radial direction, and a rotor axially inserted in an axial bore of the stator and supported for rotation. Protrusions for narrowing radially inner open ends of the slots are formed in axially separate parts of radially inner axial edges of the teeth by crimping. | 09-03-2009 |
20090302705 | Methods and apparatus for twisting rotor and stator conductor ends - Methods and apparatus for twisting rectangular rotor and stator conductor ends whereby most if not all conductor ends are bent at once, radially adjacent ends being bent in opposite directions. A lost motion member may be used to bend selected conductors through lesser angles for such purposes as phase interconnection and power leads. The rectangular conductors are retained against twisting so that flat conductors will bend about an axis perpendicular to the larger dimension of the conductor cross section. Various features of the methods and apparatus are disclosed. | 12-10-2009 |
20100013347 | Stators for Electrical machines - An improved stator ( | 01-21-2010 |
20100244616 | DUAL-ROTOR MOTOR - A dual-rotor motor in which inner slot angle φi is larger than outer slot angle φo. An inner notched portion is provided on both circumferential ends of an inner head. This inner notched portion provides a broader space between the inner head and an inner rotor toward both utmost ends of the inner head. An outer notched portion is provided on both circumferential ends of an outer head. This outer notched portion provides a broader space between the outer head and the outer rotor toward both utmost ends of the outer head. | 09-30-2010 |
20100244617 | STATOR HAVING IMPROVED STRUCTURE FOR RESTRICTING RELATIVE DISPLACEMENT BETWEEN STATOR CORE AND STATOR COIL - A stator for an electric rotating machine includes a hollow cylindrical stator core and a stator coil made up of a plurality of electric wires mounted on the stator core. The stator core has a plurality of slots that are formed in a radially inner surface of the stator core and spaced at predetermined intervals in the circumferential direction of the stator core. The stator core also has a plurality of tooth portions each of which is formed to radially extend between one circumferentially-adjacent pair of the slots. Moreover, the stator core further has a plurality of displacement restricting portions each of which is formed, as an integral part of the stator core, on an axial end face of a corresponding one of the tooth portions of the stator core to restrict displacement of the stator coil relative to the stator core. | 09-30-2010 |
20110025165 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine including a rotor in which a plurality of magnetic poles are provided in circumferential direction, and a stator within the rotor is disposed with a gap against the rotor, wherein: coil groups are received in a slot between two teeth of the stator core; each of the teeth has a tooth main body and two tooth tip edge portions, and the tooth main body and the tooth tip edge portions are connected by connecting portions, with slits being formed in the coil sides of the connecting portions; and the slits extend from opening portions towards the centers of the tooth tip edge portions in circumferential direction, and are formed so that their tooth main body sides and their tip edge portion sides, that together define the opening portions of the slits, contact one another; with the gaps between adjacent ones of the tooth tip edge portions in circumferential direction being smaller than a width of the slot. | 02-03-2011 |
20110101816 | STATOR FOR A ROTATING ELECTRIC MACHINE AND ROTATING ELECTRIC MACHINE - A stator includes a stator-core having slots and teeth, and a back-yoke having convex and concave portions. The convex portions are partially inserted into the slots, and the concave portions receive the teeth. The teeth include tip portions whose circumferential widths become larger along a radial direction from the inside to the outside of the stator. The back-yoke includes convex portions whose circumferential widths become larger along the radial direction from the outside to the inside of the stator. The tip portions and the convex portions have substantially the same shape. The length of a joint portion between the tip portion and the convex portion, the circumferential width of the tooth corresponding to a tip surface of the convex portion, the width of a root portion of the tooth, and the circumferential width of the convex portion corresponding to a bottom face of the concave portion are substantially the same. | 05-05-2011 |
20110291521 | STATOR FOR AN INDUCTION MOTOR - A substantially hollow cylindrical stator core having a longitudinal axis includes a plurality of winding slots longitudinally parallel with the longitudinal axis each having first and second ends wherein the slots taper progressively larger closer to the ends of the slots. | 12-01-2011 |
20120001516 | STATOR FOR ELECTRIC ROTATING MACHINE AND METHOD OF MANUFACTURING THE SAME - A stator includes an annular stator core and a stator coil. In each of slots of the stator core, there are received a predetermined number of in-slot portions of the stator coil in alignment with each other in a radial direction of the stator core. Each of side surfaces of tooth portions of the stator core includes, at its radially inner end, an oblique surface that extends obliquely with respect to the radial direction. The oblique surfaces are shaped so that for each of the slots, the circumferential width of the slot is decreased in the radially inward direction in that part of the slot which is located between a corresponding pair of the oblique surfaces. For each of the slots, the in-slot portion which is located radially innermost in the slot is held at a predetermined radial position by the corresponding pair of the oblique surfaces. | 01-05-2012 |
20120007465 | ELECTRIC MACHINE HAVING MULTIDIRECTIONAL SKEW - An electric machine includes a rotor rotatable about a central axis. The rotor includes at least one rotor element having a first element edge. A stator includes a stator face facing the rotor and a plurality of stator slots. Each stator slot has at least one stator slot edge located at the stator face. A first edge portion of the at least one stator slot edge is oriented nonparallel to the first element edge in a first direction and a second edge portion of the at least one stator slot edge is oriented nonparallel to the first element edge in a second direction. | 01-12-2012 |
20120019096 | Stator for Electric Rotating Machine - A stator core is comprised of first and second stator core pieces that are arranged to overlap each other in the axial direction of the stator core. The first stator core piece includes first protrusions, each of which is formed on one circumferential side of a corresponding tooth portion of the stator core, and first slot opening portions that open on the radially inner surface of the first stator core piece. The second stator core piece includes second protrusions, each of which is formed on the other circumferential side of a corresponding tooth portion, and second slot opening portions that open on the radially inner surface of the second stator core piece. For each slot of the stator core, a corresponding pair of the first and second slot opening portions which communicate with the slot are offset from each other in the circumferential direction of the stator core. | 01-26-2012 |
20130093283 | SPINDLE MOTOR - Disclosed herein is a spindle motor. The spindle motor uses a general (non neodymium) permanent magnet rather than a neodymium magnet as a permanent magnet and compensates for a reduced counter electromotive force (B-EMF) value by allowing the center of a connection part formed in a round shape between poles around which coils are wound to be different from that of a core to increase a coil inductance value, thereby making it possible to easily sense and control a rotation state of the spindle motor. | 04-18-2013 |
20130342070 | STATOR OF MOTOR AND MOTOR - Provided is a stator of a motor which is capable of reducing an iron loss generated in a motor and thereby attaining a high-efficient motor. A stator of a motor comprises a yoke of a tubular shape; and teeth each of which includes an extending portion extending inward in a radial direction of the yoke from the yoke and an increased-width portion formed at a tip end of the extending portion so as to have a greater width than the extending portion in a circumferential direction of the yoke; wherein the extending portion has a narrower portion having a smaller width than a remaining portion of the extending portion. | 12-26-2013 |
20140028146 | Induction Motor and Railway Vehicle Using Induction Motor - An induction motor includes: a stator and a rotor arranged so as to face the stator via a void, the rotor including conductor bars in a plurality of slots formed by a plurality of teeth arranged so as to extend in the circumferential direction of a rotatably held rotor core, wherein the circumferential width of distal end portions of the slots on the radially outside of the rotor core are narrowed by distal end portion of the teeth on the radially outside of the rotor core, and the teeth are each formed with a projection protruding in an arcuate shape from the distal end of the tooth on the radially outside of the rotor core toward the conductor bar in each of the slots. | 01-30-2014 |
20140055001 | STATOR OF MOTOR AND MOTOR - Provided is a stator of a motor which is capable of reducing a loss generated in a motor and thereby attaining a high-efficient motor, and a motor including the stator. A stator of a motor comprises a stator core ( | 02-27-2014 |
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 |
20140184015 | STATOR OF MOTOR AND MOTOR - A stator of a motor comprises a stator core including a plurality of plate members stacked together; the stator core including: a yoke of a tubular shape; and teeth each of which includes an extending portion extending inward in a radial direction of the yoke from the yoke and an increased-width portion formed at a tip end of the extending portion so as to have a greater width than the extending portion in a circumferential direction of the yoke; wherein the extending portion has a constant-width portion extending radially in a straight-line shape so as to have a constant circumferential width, a narrower portion having a circumferential width smaller than a circumferential width of the constant-width portion, and a clamp portion for securing the plurality of plate members to each other; and wherein at least a portion of the clamp portion is located in the narrower portion. | 07-03-2014 |
20140300244 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes a rotor and a stator. A permanent magnet is attached to the rotor. The stator opposes the rotor with a gap provided therebetween, and has an open slot that opens toward the rotor and in which a high-voltage wire is installed. The gap has a gap length at which the sum of losses including a surface loss that occur when the high-voltage wire is excited and the rotor is rotated at a high rotation speed is less than or equal to a threshold that corresponds to a target loss. | 10-09-2014 |
20140346919 | ELECTRICAL MACHINE HAVING PARTIALLY PARALLEL SLOTS AND TEETH - A tubular body for an electrical machine is provided. The tubular body comprises a curved surface area, a first tooth and a second tooth. The tubular body is arrangable with respect to a further tubular body such that one of the tubular body or the further tubular body is rotatable with respect to the other one around a rotary axis. The first tooth and the second tooth extend from the curved surface area along a radial direction with respect to the rotary axis, wherein the first tooth and the second tooth are spaced apart from each other along a circumferential direction around the rotary axis. The first tooth comprises a first side wall facing a second side wall of the second tooth, wherein the first side wall comprises a first section which is parallel to the second side wall such that a circumferential distance between the first section and the second side wall is constant along the radial direction. | 11-27-2014 |
20150008785 | ARMATURE FOR ROTATING ELECTRIC MACHINE - An armature for a rotating electric machine includes an armature core and an armature coil. The armature core includes a substantially annular main body disposed in radial opposition to a field of the machine and teeth extending from the main body radially toward the field. The armature coil is arranged between the teeth of the armature core. For each of the teeth, there are formed a protrusion and a pair of claws at a distal end of the tooth. The protrusion protrudes from a circumferentially central part of the distal end of the tooth radially toward the field. The claws extend, respectively on opposite circumferential sides of the protrusion, from the distal end of the tooth toward the field. Each of the claws has a smaller width at its distal end than at its proximal end and is arcuate-shaped so as to engage with and thereby retain the armature coil. | 01-08-2015 |
20150008786 | THREE-PHASE PERMANENT MAGNET-TYPE SYNCHRONOUS MOTOR - A cogging torque can be significantly reduced in a three-phase permanent magnet-type synchronous motor. In a three-phase permanent magnet-type synchronous motor where a fraction of 2N/3P is not an integer assuming the number of magnetic poles of a rotator is P and the number of slots of a stator is N, the stator includes a tooth facing a surface of a magnetic pole of the rotator via a void and a tooth width of the tooth in the circumferential direction is approximately ½ of a slot pitch of the stator. In a three-phase permanent magnet-type synchronous motor of an outer rotor type, the tooth of the stator has a radial cross section with an approximately uniform shape from a tooth tip portion to a tooth root portion or a radial cross section with a larger tooth root portion than a tooth tip portion to allow mounting a winding unit from the tooth tip portion. The winding unit is preliminarily wound by a coil. | 01-08-2015 |
20160149444 | STATOR OF INTERIOR PERMANENT MAGNET SYNCHRONOUS MOTOR - A stator of an interior permanent magnet synchronous motor is provided. The stator spaced apart from a rotor by a predetermined gap within an interior permanent magnet synchronous motor includes a stator tooth that is circumferentially spaced apart by a predetermined distance while interposing a slot therebetween that corresponds to an exterior diameter surface of the rotor. Additionally, a stator shoe is formed at an end of the stator tooth and includes an interior diameter surface of a predetermined diameter that faces the exterior diameter surface of the rotor. A cross point between a circle has a diameter of (interior diameter of the stator shoe×1.0287×24/slot number) mm and the stator tooth is a tooth end start point of the stator tooth. | 05-26-2016 |
20170237304 | STATOR FOR ROTARY ELECTRIC MACHINE | 08-17-2017 |
20190149023 | SLOT WALL INSULATION FOR A STATOR OF AN ELECTRIC MOTOR | 05-16-2019 |
310216071 | Plural diverse slot shapes | 9 |
20090236929 | ROTOR OF AN ELECTRICAL MACHINE AND MOTOR WITH SUCH A ROTOR - The invention concerns a rotor of an electrical machine, particularly a driving motor for a hermetically enclosed refrigerant compressor with a body ( | 09-24-2009 |
20090289521 | SINGLE-PHASE MOTOR AND HERMETIC COMPRESSOR - It is an object to obtain a highly efficient and low-cost single-phase motor by producing the motor in a form that allows a proper material layout, with securing a magnetic path of a coreback of a stator iron core. A stator iron core | 11-26-2009 |
20090315429 | ROTATING ELECTRICAL MACHINE - The present invention provides a rotating electrical machine including a rotor core that does not produce narrow areas in rotor slots even if circumferential ends of fan-shaped segment cores are displaced radially outwardly and circumferentially during operation. In the present invention, slots near circumferential ends of the fan-shaped segment cores are made larger than slots in circumferential intermediate portions of the segment cores. With such a configuration, even if the circumferential ends of the segment cores are displaced radially outwardly and circumferentially during operation, the circumferential ends of the segment cores forming the large slots do not protrude into the slots formed in the circumferential intermediate portions of axially adjacent segment cores, thereby preventing narrow areas from being produced in the rotor slots. | 12-24-2009 |
20120319526 | ELECTRIC MACHINE - An electric machine comprises a rotor ( | 12-20-2012 |
310216072 | With plural diverse pole widths | 5 |
20100084942 | ROTATING ELECTRIC MACHINE - A rotating electric machine is provided, where a generator has an increased capacity and a reduced size achieved by electromagnetically effectively utilizing that parts of a rotor core which are outside the narrowest parts of magnetic poles of the rotor core to permit large field current and suppress an increase in temperature of rotor coils. The rotating electric machine includes a stator constructed by winding armature coils around a stator core ( | 04-08-2010 |
20110037339 | CONCENTRATED WINDING MACHINES WITH REDUCED TORQUE RIPPLE AND METHODS FOR DESIGNING THE SAME - Systems and methods are provided for a motor having a concentrated winding construction with reduced torque ripple. A motor comprises a stator including a plurality of tooth segments disposed circumferentially to establish a hollow core and a rotor rotatably disposed inside the hollow core. The plurality of tooth segments define a plurality of slot openings associated with a plurality of slots. Each slot of the plurality of slots has a slot opening and at least one slot opening of the plurality of slot openings is asymmetric with respect to the plurality of slot openings. | 02-17-2011 |
20120299433 | STATOR OF A PERMANENTLY EXCITED ROTATING ELECTRIC MACHINE - The invention relates to a stator of a permanently excited rotating electric machine having first and second coil groups arranged directly sequentially in the circumferential direction, wherein a first central tooth having a first central tooth width MB is disposed at the center of the first coil group, wherein a first boundary tooth having a first boundary tooth width RB is disposed between the first and the second coil groups, wherein the first boundary tooth width RB is substantially RB=a*ZB and the first central tooth width MB is substantially MB=(2a)*ZB, wherein the factor a is greater than 0 and less than 1. The detent moments and/or oscillating moments occurring in a permanently excited rotating electric machine can thereby be reduced. | 11-29-2012 |
20130169105 | STATOR STRUCTURE OF MOTOR - A stator structure of motor includes at least an outer ring part having a plurality of containing slots, a plurality of salient ribs having a length “d”, a plurality of first slot legs having a first width “W | 07-04-2013 |
20150137652 | 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. | 05-21-2015 |
310216073 | With plural diverse pole shapes | 3 |
20100253176 | ELECTRICAL MACHINE HAVING A STATOR WITH RECTANGULAR AND TRAPEZOIDAL TEETH - Arrangement at an electric machine, particularly motor, generator, or actuator, with a stator with teeth ( | 10-07-2010 |
20110050028 | ELECTRICAL MACHINE AND PROCESS FOR MANUFACTURING AN ELECTRICAL MACHINE - The invention relates to an electrical machine with a stator ( | 03-03-2011 |
20160141924 | ROTOR OF WOUND ROTOR SYNCHRONOUS MOTOR - A rotor of a wound rotor synchronous motor (WRSM) drive motor is arranged with a predetermined air gap to an inside surface of a stator, and the rotor may include a rotor core including steel sheets, where the rotor core may has rotor tees arranged at fixed intervals on an outside circumferential surface of a rotor body in a circumferential direction with a slot interposed between the rotor tees for winding a rotor coil thereon, and a rotor shoe formed at an end of each of the rotor tees opposite to the inside diametral surface of the stator, and the rotor core may have a plurality of core groups respectively having stacks of steel sheets with different shapes from one another, such that the rotor tees have different widths from one another in respective sections of a shaft in a shaft direction. | 05-19-2016 |