公开(公告)号：US11228270B2

公开(公告)日：2022-01-18

申请号：US16985551

申请日：2020-08-05

Applicant: DENSO CORPORATION

Inventor： Hirofumi Kinjo ,  Yuji Ito ,  Makoto Taniguchi

IPC: H02P25/18 ,  H02P27/06

Abstract: A drive apparatus is provided for driving a multi-phase rotating electric machine. The rotating electric machine includes a plurality of winding groups for respective phases. The drive apparatus includes a first inverter connected with start terminals of the winding groups of the rotating electric machine, a second inverter connected with intermediate terminals of the winding groups, and an energization controller configured to selectively perform energization of the winding groups by the first inverter and energization of the winding groups by the second inverter. Each of the first and second inverters includes a plurality of switch pairs respectively corresponding to the winding groups and each consisting of an upper-arm switch and a lower-arm switch that are connected in series with each other. Moreover, each of the upper-arm and lower-arm switches of the first inverter is configured to have bidirectionally-conducting and bidirectionally-blocking functions.

公开(公告)号：US11133733B2

公开(公告)日：2021-09-28

申请号：US16748362

申请日：2020-01-21

Applicant: DENSO CORPORATION

Inventor： Yuki Takahashi ,  Makoto Taniguchi

IPC: H02K21/14 ,  H02K21/02 ,  H02K21/04

Abstract: A rotary electrical machine includes a switch for supplying power to a field winding and controller. A ratio of an on-time to one switching cycle of the switch is defined as a duty ratio, and a duty ratio which is larger than the duty ratio corresponding to the field current that gives the maximum reduction amount of the inductance of the field winding with respect to an increasing amount of the field current in a range that the current can take and has a value less than 100% is set as a predetermined value. The controller calculates the duty ratio wherein an upper limit of the ratio is the predetermined value and turns on/off the switch based on the calculated duty ratio. Also, a relay and abnormality detection part that detects abnormality in the switch. The relay is switched to off in response to the occurrence of abnormality being detected.

公开(公告)号：US10910902B2

公开(公告)日：2021-02-02

申请号：US16546405

申请日：2019-08-21

Applicant: DENSO CORPORATION

Inventor： Makoto Taniguchi ,  Akira Fukushima

IPC: H02K21/12 ,  H02K3/42 ,  H02K1/02 ,  H02K1/16 ,  H02K1/27 ,  H02K21/14

Abstract: In a rotary electric machine, each of teeth of a stator core is provided with a covering portion. The covering portion of each of the teeth is made of a soft magnetic material having a lower iron loss factor than each steel plate. The covering portion of each of the teeth covers at least a part of a surface of the corresponding one of the teeth.

公开(公告)号：US09929629B2

公开(公告)日：2018-03-27

申请号：US15297734

申请日：2016-10-19

Applicant: DENSO CORPORATION

Inventor： Makoto Taniguchi

IPC: H02K15/06 ,  H02K15/02 ,  H02K15/08 ,  H02K15/04 ,  H02K21/16 ,  H02K29/08 ,  H02K11/215 ,  H02K11/38 ,  H02K1/14 ,  H02K3/18 ,  H02K7/08 ,  H02K1/27

CPC classification number: H02K15/0435 ,  H02K1/146 ,  H02K1/2706 ,  H02K1/278 ,  H02K3/18 ,  H02K7/083 ,  H02K11/215 ,  H02K11/38 ,  H02K15/02 ,  H02K15/026 ,  H02K15/06 ,  H02K15/08 ,  H02K21/16 ,  H02K29/08 ,  H02K2213/03 ,  Y10T29/49009 ,  Y10T29/49012

Abstract: A rotating electrical machine includes a supporting member, a stator core, a winding set, a shaft, a rotor, a magnetic generator, and a magnetic detector. The stator core has a ring-shaped yoke held inside the supporting member and tooth portions projecting from the yoke in a radial inward direction of the yoke. The winding set is wound on the tooth portions. The shaft extends through the stator core and is rotatably supported by the supporting member. The rotor is located in the stator core and rotates with the shaft. The magnetic generator is located at an end of the shaft. The magnetic detector outputs a signal indicative of a change in magnetic flux density created by the magnetic generator. The number of the tooth portions for every magnetic pole pair in the rotor is even.

公开(公告)号：US09577497B2

公开(公告)日：2017-02-21

申请号：US14187610

申请日：2014-02-24

Applicant: DENSO CORPORATION

Inventor： Makoto Taniguchi

IPC: H02K11/00 ,  H02K21/14 ,  H02K29/08 ,  H02K1/27

CPC classification number: H02K11/215 ,  H02K1/2746 ,  H02K11/01 ,  H02K21/14 ,  H02K29/08 ,  H02K2201/03

Abstract: A rotating electric machine has a semiconductor magnetic sensor and a cylindrical housing with a cylinder part, which is made of a soft magnetic material, positioned closer to the semiconductor magnetic sensor relative to a back yoke of a stator core. The semiconductor magnetic sensor is positioned away from the cylindrical housing so that a shortest distance between a center of the semiconductor magnetic sensor and the cylindrical housing is equal to or greater than 50 times of a sum of a first space distance and a second space distance. With such an arrangement, a leak magnetic field generated by magnetic poles that leaks in an axial direction is prevented from disturbing the semiconductor magnetic sensor. Thus, a rotation position detection accuracy of the semiconductor magnetic sensor is improved.

Abstract translation: 旋转电机具有半导体磁传感器和圆柱形壳体，其具有由相对于定子芯的后轭相对于半导体磁传感器定位的软磁材料制成的圆筒部。 半导体磁传感器远离圆筒形壳体定位，使得半导体磁传感器的中心与圆柱形壳体之间的最短距离等于或大于第一空间距离和第二空间距离之和的50倍。 通过这样的布置，可以防止由沿轴向泄漏的磁极产生的泄漏磁场扰乱半导体磁传感器。 因此，提高了半导体磁传感器的旋转位置检测精度。

公开(公告)号：US09431859B2

公开(公告)日：2016-08-30

申请号：US14142218

申请日：2013-12-27

Applicant: DENSO CORPORATION

Inventor： Makoto Taniguchi ,  Hiroki Tomizawa ,  Tatsuya Inagaki ,  Masahiro Goto

IPC: H02K21/12 ,  H02K1/27

CPC classification number: H02K1/2746 ,  H02K2213/03

Abstract: A motor is provided having a consequent-pole type rotor that has soft magnetic material poles and magnetic poles positioned around the rotor in an alternating manner. A convex surface on each of the poles is formed as a surface in which a midpoint of the convex surface has a radial distance from the rotation axis that is greater than a radial distance of the circumferential edges of the convex surface from the rotation axis. A radial width of a first magnetism transfer part of a cylindrical yoke and a radial width of a second magnetism transfer part of the magnetic pole fulfill a relationship such that an appropriate balance of the magnetic resistance between the first magnetism transfer part and the second magnetism transfer part is achieved. As a result, cogging torque is reduced without reducing output torque.

Abstract translation: 提供一种电动机，其具有随后的极型转子，其具有以交替方式设置在转子周围的软磁性材料极和磁极。 每个极上的凸表面形成为凸表面的中点距离旋转轴线的径向距离大于凸表面的周向边缘与旋转轴线的径向距离的表面。 圆柱形磁轭的第一磁性传递部分的径向宽度和磁极的第二磁性传递部分的径向宽度实现了这样的关系，使得第一磁传递部分和第二磁传递部分之间的磁阻的适当平衡 部分实现。 结果，齿槽转矩减小而不降低输出转矩。

公开(公告)号：US09106115B2

公开(公告)日：2015-08-11

申请号：US13930055

申请日：2013-06-28

Applicant: DENSO CORPORATION

Inventor： Makoto Taniguchi

IPC: H02K1/27 ,  H02K21/14

CPC classification number: H02K1/2766 ,  H02K1/274 ,  H02K1/278 ,  H02K21/14 ,  H02K2213/03

Abstract: A rotating electrical machine includes a stator core, a rotor core, and permanent magnets. The stator core includes a yoke and tooth portions projecting from the yoke in a radial inward direction. Each tooth portion has a base joined to the yoke and an end opposite to the base. The rotor core includes a boss portion and projections. The projections project from the boss portion in a radial outward direction and spaced in a circumferential direction. Each permanent magnet is located between and spaced from adjacent projections to forma gap in the circumferential direction. A width of the gap is not greater than a width of the end of the tooth portion in the circumferential direction.

Abstract translation: 旋转电机包括定子铁芯，转子铁心和永久磁铁。 定子铁芯包括轭和从径向向内的轭偏转的齿部。 每个齿部具有连接到轭的基部和与基部相对的端部。 转子芯包括凸起部分和突起。 凸起部从径向向外突出并沿圆周方向隔开。 每个永磁体位于相邻突起之间并与其间隔开，以在圆周方向上形成间隙。 间隙的宽度不大于齿部在圆周方向上的端部的宽度。

公开(公告)号：US08928264B2

公开(公告)日：2015-01-06

申请号：US13845513

申请日：2013-03-18

Applicant: Denso Corporation

Inventor： Makoto Taniguchi

IPC: H02P27/02 ,  H02P6/14 ,  H02P6/08

CPC classification number: H02P27/06 ,  B62D5/0403 ,  B62D5/046 ,  H02P25/188 ,  H02P25/22

Abstract: According to typical examples, the first stator winding having the lower rated voltage is connected to the second direct-current voltage source only when the rotation speed of the rotating electrical machine becomes high. Therefore, output in a high-rotation range can be ensured while preventing the second stator winding from reaching a heat-generation limit. Furthermore, such switching operations can be actualized by the first switch and the second switch. Therefore, a control device of a rotating electrical machine can be actualized by a relatively simple configuration.

Abstract translation: 根据典型的例子，仅当旋转电机的转速变高时，具有较低额定电压的第一定子绕组连接到第二直流电压源。 因此，能够在防止第二定子绕组达到发热极限的同时确保高旋转范围的输出。 此外，这种切换操作可以由第一开关和第二开关实现。 因此，可以通过相对简单的结构实现旋转电机的控制装置。

公开(公告)号：US11973448B2

公开(公告)日：2024-04-30

申请号：US17212655

申请日：2021-03-25

Applicant: DENSO CORPORATION

Inventor： Hirofumi Kinjo ,  Takashi Kashiwazaki ,  Makoto Taniguchi

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

CPC classification number: H02P27/08 ,  H02M1/08 ,  H02M7/53871

Abstract: A drive device for a rotary electric machine includes a first inverter that has high-potential side and low-potential side switching elements corresponding to phases of the rotary electric machine and is connected to a DC power supply, a second inverter that has high-potential side and low-potential side switching elements corresponding to the phases and is connected to the first inverter via a connection line, and a controller that controls the first and second inverters so that if a percentage modulation expressed by a fundamental wave component amplitude of a phase winding voltage and a DC voltage is a threshold value or more, percentage modulations of output phase voltages of the first and second inverters are more than 1, and so that a phase difference between a phase of the output phase voltage of the first inverter section and that of the second inverter section changes depending on the percentage modulation.

公开(公告)号：US11824428B2

公开(公告)日：2023-11-21

申请号：US17481514

申请日：2021-09-22

Applicant: DENSO CORPORATION

Inventor： Yuki Takahashi ,  Makoto Taniguchi

IPC: H02K9/22 ,  H02K1/28 ,  H02K5/18 ,  H02K1/2786 ,  H02K3/47

CPC classification number: H02K9/22 ,  H02K1/2786 ,  H02K1/28 ,  H02K3/47 ,  H02K5/18

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.