公开(公告)号：US11489475B2

公开(公告)日：2022-11-01

申请号：US17232289

申请日：2021-04-16

Applicant: DENSO CORPORATION

Inventor： Yoshimitsu Takahashi ,  Makoto Taniguchi

IPC: H02P27/06 ,  H02M7/5387 ,  H02P23/14 ,  H02P25/22

Abstract: The present disclosure provides a power conversion apparatus converting a power from a DC power source, supplying the converted power to a rotary electric machine to drive the rotary electric machine. The power conversion apparatus according to the present disclosure includes: a first inverter circuit electrically connected to a first end of each of phase winding, transmitting power between respective phase windings and the DC power source; a second inverter circuit electrically connected to a second end each of phase winding, transmitting power between respective phase windings and the DC power source; and a control unit controlling the first inverter circuit and the second inverter circuit. The control unit is configured to change a total amount of current flowing through respective phase windings depending on a rotational speed of the rotary electric machine.

公开(公告)号：US10790774B2

公开(公告)日：2020-09-29

申请号：US16442606

申请日：2019-06-17

Applicant: DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshimitsu Takahashi ,  Masahito Fujieda ,  Tetsuya Yamada ,  Ryuji Omata ,  Kiyotaka Matsubara ,  Makoto Nakamura ,  Daigo Nobe

IPC: H02P27/06 ,  H02M5/32 ,  H02P7/291

Abstract: A drive system for an electric motor includes a first inverter that includes first switching elements, a second inverter that includes second switching elements, and a control unit that includes a first inverter control calculation section controlling on-off operation of each of the first switching elements based on a first carrier wave and a first modulation wave, a second inverter control calculation section controlling on-off operation of each of the second switching elements based on a second carrier wave and a second modulation wave, and a control synchronization section synchronizing the first carrier wave with the second carrier wave. When a sum of voltages of the first voltage source and the second voltage source is more than a voltage determination threshold, and torque of a rotating electric machine is smaller than a torque determination threshold, the control synchronization section synchronizes the first carrier wave with the second carrier wave.

公开(公告)号：US11050314B2

公开(公告)日：2021-06-29

申请号：US16423737

申请日：2019-05-28

Applicant: DENSO CORPORATION

Inventor： Yoshimitsu Takahashi ,  Mitsutaka Ito ,  Hiroshi Shimizu ,  Takeshi Endo

IPC: H02K3/28 ,  H02K3/04 ,  H02K11/33 ,  H02K1/16 ,  H02K1/27 ,  H02K7/00 ,  H02K21/14 ,  H02K3/34 ,  H02K3/14 ,  H02M7/49 ,  B60K6/26

Abstract: In a rotating electric machine, a stator includes a stator core and three phase windings. In the stator core, a plurality of slots arrayed in a circumferential direction are formed. The three phase windings are wound around the stator core. The three phase windings include first, second, and third windings. One end of the first winding is provided further towards an outer side of the stator in a radial direction than a division line that divides the slot into two in the radial direction of the stator. One end of the second winding is provided further towards an inner side of the stator in the radial direction than the division line. One end of the third winding is provided between the one end of the first winding and the one end of the second winding relative to the radial direction of the stator, with at least a single slot therebetween.

公开(公告)号：US11757373B2

公开(公告)日：2023-09-12

申请号：US17339279

申请日：2021-06-04

Applicant: DENSO CORPORATION

Inventor： Yoshimitsu Takahashi ,  Makoto Taniguchi

IPC: H02M7/5387 ,  H02M1/00 ,  H02M1/088 ,  H02M3/158 ,  H02M7/537 ,  H02M7/493 ,  H02M1/08

CPC classification number: H02M7/53871 ,  H02M1/0048 ,  H02M1/088 ,  H02M3/158 ,  H02M7/493 ,  H02M7/537 ,  H02M1/0003 ,  H02M1/08

Abstract: In a power converter for converting DC power from a DC power source into AC power and supplying the AC power to a single-phase winding or multi-phase windings, a controller controls first and second inverter circuits and performs first power conversion control to lock open/closed states of switching elements in the second inverter circuit and switch open/closed states of switching elements in the first inverter circuit, and second power conversion control to lock open/closed states of the switching elements in the first inverter circuit and switch open/closed states of the switching elements in the second inverter circuit. The controller is configured to perform either the first power conversion control or the second power conversion control when an effective value of drive current through each winding is less than a threshold, and otherwise switch between the first power conversion control and the second power conversion control.

公开(公告)号：US09136738B2

公开(公告)日：2015-09-15

申请号：US13625098

申请日：2012-09-24

Applicant: DENSO CORPORATION ,  NIPPON SOKEN, INC.

Inventor： Kazumasa Ikeda ,  Toru Wakimoto ,  Yoshimitsu Takahashi

IPC: H02K3/00 ,  H02K3/28

CPC classification number: H02K3/28

Abstract: An electric rotating machine includes a rotor and a stator. The rotor has a plurality of pairs of magnetic poles. The stator includes a stator core and a stator coil that is comprised of a plurality of phase windings wound on the stator core. The stator core has, for each of the phase windings of the stator coil, n circumferentially-consecutive single-phase slots, in which only the phase winding is received, per magnetic pole of the rotor, where n is a natural number not less than 2. Each of the phase windings of the stator coil has first to kth sections that are sequentially arranged from one end to the other end of the phase winding, where k is a natural number not less than 2. The first section is received in different ones of the single-phase slots for the phase winding from the kth section.

Abstract translation: 旋转电机包括转子和定子。 转子具有多对磁极。 定子包括定子芯和定子线圈，定子线圈由缠绕在定子芯上的多个相绕组构成。 对于定子线圈的每个相绕组，定子铁心对转子的每个磁极具有n个沿周向连续的单相槽，其中只有相绕组被接收，其中n是不小于 定子线圈的每个相绕组具有从相绕线的一端到另一端依次布置的第一至第k个部分，其中k是不小于2的自然数。第一部分被接收在不同的 用于从第k部分的相绕组的单相槽中的一个。