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公开(公告)号：US12003140B2
公开(公告)日：2024-06-04
申请号：US17515978
申请日：2021-11-01
发明人： Yang Xiao , Ziqiang Zhu , Jintao Chen , Di Wu
IPC分类号： H02K1/276 , H02K1/274 , H02K1/2753
CPC分类号： H02K1/2766 , H02K1/274 , H02K1/2753 , H02K1/276
摘要： A rotor for a motor is provided. The rotor has a rotor core, first permanent magnets mounted in first grooves of the rotor core, and second permanent magnets mounted in second grooves of the rotor core. The rotor core is provided with groove groups distributed in a peripheral direction of the rotor core. Each groove group has an air groove, a first groove and a second groove. The ends of the air groove, the first groove and the second groove, which are close to a center point of the rotor core, are close to one another. The end of the air groove, the first groove and the second groove, which are away from the center point of the rotor core, are away from one another. Multiple magnetic isolation structures are provided in the rotor core.
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公开(公告)号：US11973376B2
公开(公告)日：2024-04-30
申请号：US17223307
申请日：2021-04-06
IPC分类号： H02K1/28 , H02K1/20 , H02K1/2753 , H02K3/04 , H02K3/28
CPC分类号： H02K1/28 , H02K1/20 , H02K1/2753 , H02K3/04 , H02K3/28
摘要： An electric motor is provided and includes a U-shaped rotor including circumferentially arranged U-shaped magnets, each circumferentially arranged U-shaped magnet defining an interior, and a stator supportive of a winding structure. The winding structure includes phase coils extending axially and radially within the interior for torque production with each circumferentially arranged U-shaped magnet and end windings respectively extending outside the interior between corresponding ends of sequential pairs of the phase coils.
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公开(公告)号：US20240022126A1
公开(公告)日：2024-01-18
申请号：US18374259
申请日：2023-09-28
申请人： Black & Decker Inc.
IPC分类号： H02K1/2753 , H02K7/14 , H02K7/00
CPC分类号： H02K1/2753 , H02K7/145 , H02K7/003
摘要： A brushless direct-current (BLDC) motor is provided. The motor includes a stator including a stator core and windings; a rotor shaft disposed within the stator and extending along a longitudinal axis; and a rotor including a rotor core fixedly mounted on the rotor shaft and at least one permanent magnet mounted on an outer surface of the rotor core. A sleeve is provided including a substantially cylindrical body mounted on the at least one permanent magnet and a flange that engages a first axial end of the at least one permanent magnet to constrain the at least one permanent magnet radially and along a first axial direction. Further, a fan is mounted on the rotor shaft and engaging a second axial end of the at least one permanent magnet to constrain the at least one permanent magnet along a second axial direction.
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公开(公告)号：US11863018B2
公开(公告)日：2024-01-02
申请号：US16763711
申请日：2018-11-15
申请人： Masayuki Nashiki
发明人： Masayuki Nashiki
IPC分类号： H02K1/2753 , H02K1/14 , H02K11/33 , H02K11/215 , H02K3/12 , H02K1/02
CPC分类号： H02K1/2753 , H02K1/146 , H02K3/12 , H02K11/215 , H02K11/33 , H02K1/02 , H02K2213/03
摘要： Prioritizing one-way rotation and one-way torque in particular, a change is induced in the partial shape of a magnetic poles on the rotor of a reluctance motor in the direction of forward movement, or magnetic resistance is increased, the torque generation range of each phase is expanded, and the increase/decrease time of an electric current is ensured to reduce the noise. With the relative increase in copper losses due to this drive method, and harmful effects from the problem of an overvoltage generated in the full-pitch windings are reduced by a drive method in which the overvoltage is cancelled out.
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公开(公告)号：US11658528B2
公开(公告)日：2023-05-23
申请号：US17167781
申请日：2021-02-04
申请人： FERRARI S.p.A.
发明人： Davide Ferrara , Luca Poggio , Paolo Faverzani
IPC分类号： H02K1/27 , H02K1/2753 , H02K5/20 , H02K1/28 , H02K3/12
CPC分类号： H02K1/2753 , H02K1/28 , H02K3/12 , H02K5/207
摘要： Electric machine having: a shaft; a rotor with permanent magnets that is fitted to the shaft; a stator having a magnetic core which consists of a series of laminations made of ferromagnetic material and longitudinally crossed by a plurality of stator slots; and a stator winding having a plurality of rigid bars that are inserted in corresponding stator slots and that are covered, on the outside, with an insulating coating. The rotor has a plurality of magnetic elements, which are arranged beside one another around the rotation axis so as to form a closed ring. Each magnetic element is formed by a plurality of permanent magnets which are axially arranged one after the other according to a Halbach array.
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公开(公告)号：US11655894B2
公开(公告)日：2023-05-23
申请号：US17443407
申请日：2021-07-26
申请人： DENSO CORPORATION
发明人： Koji Sakaguchi , Jun Yamada , Haruka Miyano
CPC分类号： F16H61/32 , F16H61/0202 , H02K1/2753 , H02P3/18 , H02P6/16 , H02P6/28 , F16H2061/326 , H02K1/14
摘要： A shift range control device switches a shift range by controlling drive of a motor. An angle calculation unit calculates a motor angle based on a signal from a rotation angle sensor that detects a rotation position of the motor. A drive control unit drives the motor so that the motor angle becomes a target angle according to the target shift range, and stops a rotor by a fixed phase energization, when the motor angle reaches a target angle. When the rotor vibrates with respect to stop position, the drive control unit maintains a state in which a brake torque, which is the torque generated when moving away from center of vibration, is larger than an acceleration torque, which is the torque generated when moving toward the center of vibration, and reduces the current that energizes the motor based on a difference between the brake torque and the acceleration torque.
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公开(公告)号：US11644789B2
公开(公告)日：2023-05-09
申请号：US17333279
申请日：2021-05-28
发明人： Eijiro Ohashi , Yasukazu Maeda , Takuya Miyashita
IPC分类号： H02P21/14 , G03G21/16 , H02P6/16 , H02P6/28 , H02K9/04 , H02K1/2753 , H02M7/5387 , H02K1/16
CPC分类号： G03G21/16 , H02K9/04 , H02P6/16 , H02P6/28 , H02K1/16 , H02K1/2753 , H02M7/53871
摘要： A motor control apparatus excites an excitation phase targeted for excitation among a plurality of excitation phases of a motor. The motor control apparatus, in a state in which a rotor of the motor is stopped, excites an excitation phase corresponding to a stop position of the rotor among the plurality of the excitation phases, and measures a physical quantity which changes in accordance with an inductance of at least one of a plurality of coils configuring the plurality of excitation phases. The motor control apparatus estimates a temperature of the rotor from a measurement value of the measured physical quantity, and decides a parameter value for control of the motor based on the estimated temperature.
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公开(公告)号：US20220271637A1
公开(公告)日：2022-08-25
申请号：US17628264
申请日：2020-07-08
IPC分类号： H02K21/02 , H02K1/2753 , H02K21/16 , H02K1/17 , H02K7/14
摘要： An electric motor having low vibration and/or noise comprises a rotor or stator comprising permanent magnets each comprising at least two pole pairs, with an internal flux gap within the permanent magnets between adjacent internal pole pairs. The internal flux gap between the internal pole pairs may be similar to an external pole to pole physical spacing between adjacent poles of adjacent magnets. The motor is suitable for use in for example a laundry washing machine or dryer or washer-dryer.
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公开(公告)号：US11336137B2
公开(公告)日：2022-05-17
申请号：US16069726
申请日：2017-01-10
IPC分类号： H02K1/28 , H02K1/276 , H02K1/2753
摘要： A rotor assembly (10) has a rotor support hub (12) which includes a plurality of first connection parts arranged about a periphery the rotor support hub. The rotor assembly further has a plurality of rotor segments (14) each having a second connection part. Each of the second connection parts are cooperable with at least one of the plurality of first connection parts to connect each of the rotor segments about the periphery the rotor support hub. A plurality of fixing parts (26) are each configured to be received between cooperating first and second connection parts and to form an inference fit therebetween so as to secure the rotor segments to the rotor support hub. The rotor support hub may comprise a plurality of laminations.
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