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Patent Agency Ranking
公开(公告)号：US20170111003A1
公开(公告)日：2017-04-20
申请号：US15125288
申请日：2015-03-19
Applicant: NSK LTD.
Inventor： Yusuke KIKUCHI , Gen KIMURA , Zhipeng TU
IPC: H02P25/22 , H02K1/27 , H02K3/28 , H02K7/116 , B62D6/02 , H02P27/08 , H02P6/10 , B62D5/04 , B62D6/10 , H02K1/14 , H02K11/24
CPC classification number: H02P25/22 , B62D5/0403 , B62D5/046 , B62D5/0463 , B62D6/02 , B62D6/10 , H02K1/146 , H02K1/2706 , H02K3/28 , H02K7/1166 , H02K11/225 , H02K11/24 , H02K21/16 , H02P6/10 , H02P27/08
Abstract: A motor includes an annular stator core including teeth arranged side by side in a circumferential direction on an inner circumferential surface of a back yoke. The motor includes 3n (n is an integer) first coil groups arranged in the circumferential direction at regular intervals, each of the first coil groups being constituted of first coils that are respectively wound, in a concentrated manner, around the teeth arranged adjacent to one another, and that are excited by a first inverter, and also includes 3n second coil groups arranged in the circumferential direction at regular intervals, each of the second coil groups being constituted of second coils that are respectively wound, in a concentrated manner, around the teeth arranged adjacent to one another in positions different from positions of the teeth around which the first coils are wound in a concentrated manner, and that are excited by a second inverter.
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2.发明申请公开(公告)号：US20170366076A1
公开(公告)日：2017-12-21
申请号：US15532783
申请日：2015-11-30
Applicant: NSK Ltd.
Inventor： Yusuke KIKUCHI , Zhipeng TU , Gen KIMURA
CPC classification number: H02K29/03 , B62D5/04 , B62D5/0403 , H02K1/246 , H02K1/278 , H02K2213/03
Abstract: [Problem]An object of the present invention is to provide the motor which is possible to obtain the skew effect within the rotor gap surface by arranging the respective magnetic pole pitches at imbalance positions without causing the increasing of the magnet machining cost and the rotor assembly time, and the electric power steering apparatus equipped with the motor and a vehicle.[Means for Solving the Problem]The present invention is a motor that has a skew effect within a rotor gap surface of a mechanical angle one-cycle, wherein a rotor magnetic pole comprises plural magnetic salient pole portions by means of magnetic material, an N-pole and an S-pole magnets are alternately arranged on a rotor surface between the magnetic salient pole portions, and magnetic pole pitches of an electrical angle one-cycle, which comprise the magnetic salient pole portions and the N-pole and the S-pole magnets, are unevenly arranged.
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3.发明申请公开(公告)号：US20170297616A1
公开(公告)日：2017-10-19
申请号：US15508742
申请日：2015-09-01
Applicant: NSK LTD.
Inventor： Yusuke KIKUCHI , Gen KIMURA , Zhipeng TU
IPC: B62D5/04 , H02P6/16 , H02P29/024
CPC classification number: B62D5/0487 , B62D5/04 , B62D5/0463 , B62D6/00 , H02P6/16 , H02P27/06 , H02P29/00 , H02P29/024
Abstract: A motor control unit is provided that controls a motor with multi-system windings via motor driving circuits on winding systems based on a current command value including current detecting circuits to detect at least two-phase or more currents for each of the multi-system windings of the three-phase motor, three-phase/two-phase converting sections to convert the detected phase currents to two-phase currents for the multi-system windings, and a failure diagnosing section to perform a current-calculation of the two-phase currents converted to two-phase for the multi-system windings, and to perform a diagnosis failure by comparing a difference of current-calculated results between the multi-system windings and an accumulating value of the difference with respective thresholds.
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公开(公告)号：US20170050668A1
公开(公告)日：2017-02-23
申请号：US15118579
申请日：2015-03-19
Applicant: NSK LTD.
Inventor： Yusuke KIKUCHI , Gen KIMURA , Zhipeng TU
CPC classification number: B62D5/0463 , B62D5/046 , H02K1/146 , H02K1/27 , H02K3/28 , H02K16/04 , H02K2213/06 , H02P6/10 , H02P6/17 , H02P25/03 , H02P25/22 , H02P27/08
Abstract: A motor control device includes a motor, a control device, and a motor drive circuit. The motor includes a motor rotor, a motor stator, and a plurality of coil groups divided into a first coil group and a second coil group of at least two systems for each of three phases, and configured to excite a stator core by three-phase alternating currents. In the motor drive circuit, a first motor drive circuit supplies a three-phase AC first motor drive current to the first coil group based on a command value, and a second motor drive circuit supplies a three-phase AC second motor drive current having a phase difference from a phase of the first motor drive current, to the second coil group.
Abstract translation: 电动机控制装置包括电动机，控制装置和电动机驱动电路。 电动机包括电动机转子，电动机定子和分成三相中的至少两个系统的第一线圈组和第二线圈组的多个线圈组，并且被配置为通过三相激励定子芯 交流电 在电动机驱动电路中，第一电动机驱动电路基于指令值向三相AC第一电动机驱动电流供给第一线圈组，而第二电动机驱动电路提供三相AC第二电动机驱动电流， 与第一电动机驱动电流的相位相差到第二线圈组。
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公开(公告)号：US20160336823A1
公开(公告)日：2016-11-17
申请号：US15112472
申请日：2015-01-21
Applicant: NSK LTD.
Inventor： Yusuke KIKUCHI , Gen KIMURA , Zhipeng TU
Abstract: A motor includes a motor rotor and a motor stator. An outer circumference of a rotor yoke includes a convex portion projecting outward in a radial direction of the rotor yoke and a concave portion between the convex portions adjacent to each other in a circumferential direction. A magnet is arranged on an adhering surface that is a surface of the concave portion, and the convex portion includes at least one of magnetic gaps that penetrates through the rotor yoke in the axial direction and that has magnetic permeability lower than that of the rotor yoke.
Abstract translation: 电动机包括电动机转子和电动机定子。 转子磁轭的外周包括沿转子磁轭的径向向外突出的凸部和在圆周方向上彼此相邻的凸部之间的凹部。 在作为凹部的表面的粘合面上配置有磁铁，凸部包括在轴向上贯穿转子磁轭的磁隙中的至少一个，并且具有低于转子磁轭的导磁率的磁导率 。
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