公开(公告)号：US20200162003A1

公开(公告)日：2020-05-21

申请号：US16748535

申请日：2020-01-21

Applicant: DENSO CORPORATION

Inventor： Yuki TAKAHASHI ,  Makoto TANIGUCHI

IPC: H02P21/30 ,  H02P21/22 ,  H02P25/22 ,  H02P27/12

Abstract: A rotating electrical machine includes a magnetic field-producing unit, an armature with a multi-phase armature winding, and a rotor. The magnetic field-producing unit includes a first portion and a second portion. The first portion is located closer to a d-axis in a d-q axis coordinate system than the second position is. The second position is located closer to a q-axis in the d-q axis coordinate system than the first position is. The magnetic field-producing unit is magnetically oriented to meet a condition where an angle which an easy axis of magnetization of the first portion makes with the d-axis is smaller than an angle which an easy axis of magnetization of the second portion makes with the q-axis. The magnetic field-producing unit is configured to have an intrinsic coercive force of 400 kA/m and also have a remanent flux density of 1.0 T or more.

公开(公告)号：US20200162002A1

公开(公告)日：2020-05-21

申请号：US16739230

申请日：2020-01-10

Applicant: DENSO CORPORATION

Inventor： Makoto TANIGUCHI ,  Takumi INOUE ,  Kazushige OKUMOTO ,  Akira FUKUSHIMA

IPC: H02P21/30 ,  H02P21/22 ,  H02P25/22 ,  H02P27/12

Abstract: A rotating electric machine drive system includes: a rotating electric machine equipped with: a rotor having one magnetic pole configured by permanent magnets, and a salient pole portion that is magnetically convex in a radial direction; and a stator wound with a multiphase stator winding; an inverter for supplying electric power to the stator winding; and a control unit for controlling energization current of the inverters. The control unit performs energization control of the stator winding such that a fundamental wave current at a fundamental frequency synchronized with a rotational speed of the rotor, and a harmonic current that is triple the fundamental frequency flow in the stator winding, and such that energization of the harmonic current generates a stator magnetic field having a specified lead phase or delay phase with respect to a third-order magnetic field of the rotor.

公开(公告)号：US20190334425A1

公开(公告)日：2019-10-31

申请号：US16506364

申请日：2019-07-09

Applicant: DENSO CORPORATION

Inventor： Makoto TANIGUCHI ,  Yuuki TAKAHASHI

IPC: H02K21/04 ,  H02K1/22

Abstract: A rotating electric machine includes a stator and a rotor. The rotor includes: a field core having at least one boss portion, a pair of disc portions and a plurality of claw-shaped magnetic pole portions; a field coil arranged between the at least one boss portion and the claw-shaped magnetic pole portions; a plurality of permanent magnets each of which is arranged between one circumferentially-adjacent pair of the claw-shaped magnetic pole portions; and a ring-shaped fixing member fixed to radially inner parts of the claw-shaped magnetic pole portions to support the claw-shaped magnetic pole portions from the radially inner side. Moreover, a d-axis magnetic circuit and a magnet magnetic circuit are at least partially coincident with each other to share a common circuit portion. When field current is supplied to the field coil, the permeance of the d-axis magnetic circuit is lower than the permeance of a q-axis magnetic circuit.

公开(公告)号：US20190238073A1

公开(公告)日：2019-08-01

申请号：US16317974

申请日：2017-07-13

Applicant: DENSO CORPORATION

Inventor： Asaka KIMURA ,  Makoto TANIGUCHI ,  Keiji KONDO

IPC: H02P6/10 ,  H02P6/15

CPC classification number: H02P6/10 ,  H02K3/28 ,  H02P6/153 ,  H02P25/18 ,  H02P25/22 ,  H02P27/06 ,  H02P2207/055 ,  H02P2209/01

Abstract: A rotating electric machine apparatus includes a rotating electric machine and a full-bridge inverter. The full-bridge inverter includes first high-side switches, first low-side switches, second high-side switches, and second low-side switches. The rotating electric machine apparatus includes: first and second neutral point switches; a full-wave driving unit that performs a full-wave driving process in which switching control of the switches is performed in a state in which the first and second neutral point switches are turned off; a half-wave driving unit that performs a half-wave driving process in which switching control of the first high-side switches and the second low-side switches is performed in a state in which the first and second neutral point switches are turned on, and the first low-side switches and the second high-side switches are turned off; and an executing unit that selects and performs either of the full-wave driving process and the half-wave driving process.

公开(公告)号：US20170104383A1

公开(公告)日：2017-04-13

申请号：US15281536

申请日：2016-09-30

Applicant: DENSO CORPORATION ,  ASMO CO., LTD.

Inventor： Katsuya FUJISAKI ,  Koji ISOGAI ,  Hiroki TOMIZAWA ,  Makoto TANIGUCHI ,  Masahiro GOTO

IPC: H02K5/124 ,  H02K7/08 ,  H02K5/16 ,  B62D5/04

CPC classification number: H02K5/124 ,  B62D5/0403 ,  B62D5/0424 ,  B62D5/0448 ,  F16C25/083 ,  F16H1/00 ,  H02K5/16 ,  H02K5/1732 ,  H02K7/083 ,  H02K7/116

Abstract: A drive device includes a shaft rotatably supported by a first bearing and a second bearing. The first bearing is disposed in a shaft hole of an output frame end. The second bearing is disposed in a bearing box of an opposite-to-output frame end. An oil seal is fixed in the shaft hole and is closer to an output end than the first bearing is, and is in sliding contact with an outer circumference of the shaft. A biasing member is housed in the bearing box and biases an outer race of the second bearing toward the output end. Accordingly, a deflection amount and a bend amount of the shaft at the location where the oil seal is disposed may be reduced.

公开(公告)号：US20150222156A1

公开(公告)日：2015-08-06

申请号：US14609517

申请日：2015-01-30

Applicant: DENSO CORPORATION

Inventor： Hiroki TOMIZAWA ,  Makoto TANIGUCHI ,  Hiroshi IMAI

IPC: H02K5/10

CPC classification number: H02K5/10 ,  H02K5/225 ,  H02K11/33

Abstract: A seal member of a driver apparatus contacts a case and a first frame end. The seal member has an opening in which a lead wire is inserted and an inside wall surface of the opening contacts the lead wire. Further, the seal member is made of a stretchable material, and is held in position only by a binding force between the case and the first frame end. The seal member is fixedly held by the first frame end and the case after an insertion of the lead wire in the opening and disposition on the fixing member opposing face. Therefore, an installation of the seal member is performed by an inserting the lead wire into the opening and a positioning the seal member on the case.

Abstract translation: 驱动器装置的密封构件接触壳体和第一框架端。 密封构件具有插入引线的开口，并且开口的内壁表面与引线接触。 此外，密封构件由可拉伸材料制成，并且仅通过壳体和第一框架端部之间的结合力保持在适当位置。 密封构件在将引线插入开口中并且配置在固定构件相对面上之后由第一框架端和外壳固定地保持。 因此，通过将引线插入开口并将密封构件定位在壳体上来进行密封构件的安装。

公开(公告)号：US20140145564A1

公开(公告)日：2014-05-29

申请号：US14027625

申请日：2013-09-16

Applicant: DENSO CORPORATION

Inventor： Makoto TANIGUCHI ,  Jirou HAYASHI ,  Tatsuya INAGAKI ,  Akihito NAITOU ,  Hiroki TOMIZAWA ,  Masaaki YAMADA ,  Masashi YAMASAKI ,  Yasufumi MATSUO ,  Shuhei MIYACHI ,  Nobuhiko URYU

IPC: H02K11/00

CPC classification number: H02K11/215 ,  H02K3/12 ,  H02K5/1732

Abstract: A housing and a rotary shaft of a motor are formed of non-magnetic material. A soft magnetic member is provided between a first axial end surface of a fixed core and a bearing. The soft magnetic member is provided on the fixed core side relative to the first bearing thereby to suppress magnetic flux leaking to a vicinity of one end part of the rotary shaft by leading the magnetic flux, which is generated from a rotor, to the rotor core through the fixed core and a casing. A magnetic angular position sensor fixed to one end part of the rotary shaft can detect a magnetic angular position of the rotor accurately without being affected by external magnetic field. As a result, noise generated by vibration of the motor can be suppressed.

Abstract translation: 电动机的壳体和旋转轴由非磁性材料形成。 在固定铁心的第一轴向端面和轴承之间设置软磁性构件。 软磁性构件相对于第一轴承设置在固定芯侧，从而通过将从转子产生的磁通引导到转子铁心来抑制向旋转轴的一个端部附近泄漏的磁通量 通过固定芯和套管。 固定在旋转轴的一端的磁性角位置传感器可以精确地检测转子的磁角位置而不受外部磁场的影响。 结果，可以抑制由电动机的振动产生的噪声。

公开(公告)号：US20220014075A1

公开(公告)日：2022-01-13

申请号：US17481661

申请日：2021-09-22

Applicant: DENSO CORPORATION

Inventor： Yuki TAKAHASHI ,  Makoto TANIGUCHI

IPC: H02K9/22 ,  H02K5/18 ,  H02K1/28

Abstract: A rotating electrical machine includes a rotor and a magnet unit. The rotating electrical machine also includes a cylindrical stator and a housing. The stator is equipped with a stator winding made up of a plurality of phase windings. The stator is arranged coaxially with the rotor and faces the rotor. The housing has the rotor and the stator disposed therein. The rotor includes a cylindrical magnet retainer to which the magnet unit is secured and an intermediate portion which connects between a rotating shaft of the rotor and the magnet retainer and extends in a radial direction of the rotating shaft. A first region located radially inside an inner peripheral surface of a magnetic circuit component made up of the stator and the rotor is greater in volume than a second region between the inner peripheral surface of the magnetic circuit component and the housing in the radial direction.

公开(公告)号：US20210257953A1

公开(公告)日：2021-08-19

申请号：US17306245

申请日：2021-05-03

Applicant: DENSO CORPORATION

Inventor： Takashi KASHIWAZAKI ,  Makoto TANIGUCHI

IPC: H02P27/08 ,  H02M7/5387 ,  H02M1/08 ,  H02P29/68 ,  H02M7/493

Abstract: A drive system for a rotating electric machine system includes: a first inverter and a second inverter connected to first and second ends of multi-phase windings respectively; a selection unit performing selection between a first setting representing that the first inverter is set to a switch drive inverter and the second inverter is set to a neutral-point drive inverter and a second setting representing that the second inverter is set to the switch drive inverter and the first inverter is set to the neutral-point drive inverter; and a drive control unit performing a switch drive task of performing on-off driving of the upper and lower arm switches of the switch drive inverter to thereby input/output power to/from the rotating electrical machine; and a neutral-point drive task of maintaining at least one of the upper and lower arm switches of the neural-point drive inverter in an on state.

公开(公告)号：US20210067079A1

公开(公告)日：2021-03-04

申请号：US17081339

申请日：2020-10-27

Applicant: DENSO CORPORATION

Inventor： Jun ISHIDA ,  Makoto TANIGUCHI

IPC: H02P25/20

Abstract: A motor control apparatus includes: a high-pole-number controller that generates a voltage command for high-pole-number drive of an electric motor and controls operation of the electric motor under the high-pole-number drive; a low-pole-number controller that generates a voltage command for low-pole-number drive of the electric motor and controls operation of the electric motor under the low-pole-number drive; and a priority pole-number determiner that determines which one of the high-pole-number drive and the low-pole-number drive is to be given priority during switching between the high-pole-number and low-pole-number drives. Moreover, during the switching, of the high-pole-number and low-pole-number controllers, the controller corresponding to the drive given priority by the priority pole-number determiner calculates the voltage command for the drive given priority; and the controller corresponding to the drive not given priority calculates, based on the voltage command for the drive given priority, the voltage command for the drive not given priority.