公开(公告)号：US11984818B2

公开(公告)日：2024-05-14

申请号：US17681922

申请日：2022-02-28

Applicant: DENSO CORPORATION

Inventor： Ken Toshiyuki

IPC: H02M7/487 ,  H02M1/32 ,  H02M7/537

CPC classification number: H02M7/487 ,  H02M1/325 ,  H02M7/537

Abstract: In an inverter, three switching circuits each include first to fourth switching elements, first and second diodes, and a control circuit controlling potentials of gates. The control circuit causes potentials of U-, V-, and W-phase output wirings to change among high, neutral point, and low potentials. The control circuit performs an emergency operation when any of the second and third switching elements and the first and second diodes has caused a short fault. In the emergency operation, a potential of a limit output wiring is caused to change between two potentials that are not inhibiting potentials, and potentials of normal output wirings are caused to change among three potentials. When the short-fault element is the second switching element or the second diode, an inhibiting potential is the low potential. When the short-fault element is the third switching element or the first diode, the inhibiting potential is the high potential.

公开(公告)号：US10742210B2

公开(公告)日：2020-08-11

申请号：US16592870

申请日：2019-10-04

Applicant: DENSO CORPORATION

Inventor： Tomotaka Suzuki ,  Yusuke Shindo ,  Yasutaka Senda ,  Ken Toshiyuki

IPC: H03K17/687

Abstract: A drive circuit drives switches that are connected to each other in parallel. The drive circuit includes individual discharge paths, a common discharge path, blocking units, a discharge switch, off-holding switches, and a drive control unit. The drive control unit selects, as target switches to be driven to be turned on, at least two switches among the switches. The at least two switches include a first switch and a second switch. The first switch is last to be switched to an off-state among the at least two switches that are selected as the target switches and switched to an on-state. The second switch is other than the first switch among the at least two switches. The off-holding switches includes a first off-holding switch and a second off-holding switch. After switching the second off-holding switch to an on-state, the drive control unit switches the discharge switch to an on-state.

公开(公告)号：US10256330B2

公开(公告)日：2019-04-09

申请号：US15824578

申请日：2017-11-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Ken Toshiyuki ,  Yusuke Shindo ,  Tomotaka Suzuki

IPC: H01L29/739 ,  H03K17/082 ,  H03K17/12 ,  H01L27/088 ,  H01L29/06 ,  H03K17/16

Abstract: A switching circuit may be provided with: a parallel circuit including a first IGBT and a second IGBT connected in parallel; a controller configured to receive a signal indicating a turn-on timing and a turn-off timing. The controller is configured to: turn on both of the first and second IGBTs at the turn-on timing, execute a first control in which one of the first and second IGBTs is turned off before the turn-off timing and the other of the first and second IGBTs is turned off at the turn-off timing in a case where current flowing through the parallel circuit is equal to or lower than a threshold value, and execute a second control in which both of the first and second IGBTs are turned off at the turn-off timing in a case where the current flowing through the parallel circuit is higher than the threshold value.

公开(公告)号：US11691519B2

公开(公告)日：2023-07-04

申请号：US16707695

申请日：2019-12-09

Applicant: DENSO CORPORATION

Inventor： Kazuya Taniguchi ,  Taro Shimosaka ,  Kunihiro Suzuki ,  Ken Toshiyuki ,  Koichi Sakata

IPC: B60L15/20 ,  B60K7/00 ,  H02P5/74 ,  H02P21/10 ,  H02P21/22

CPC classification number: B60L15/20 ,  B60K7/0007 ,  H02P5/74 ,  H02P21/10 ,  H02P21/22 ,  B60L2240/12 ,  B60L2240/423 ,  B60L2250/28

Abstract: There is provided an electrically driven vehicle that well balances calculation volumes and communication volumes of two control devices configured to drive and control motors for driving. The electrically driven vehicle comprises at least one motor for driving and a first control device and a second control device configured to control the motor. The first control device is configured to calculate a target torque that is to be output from the motor, based on information including an accelerator position, to calculate a current command based on the calculated target torque, and to send the calculated current command to the second control device. The second control device is configured to use the current command, a phase current of the motor and a rotational angle of the motor such as to drive the motor by feedback control.

公开(公告)号：US11146202B2

公开(公告)日：2021-10-12

申请号：US16775397

申请日：2020-01-29

Applicant: DENSO CORPORATION

Inventor： Hyoungjun Na ,  Ken Toshiyuki

IPC: H02P27/08 ,  H02M7/5387

Abstract: A motor system may include three switching circuits, each of which includes two upper switching elements and two lower switching elements. A controller includes a signal output module, a signal distribution module, and a signal adjusting module. The signal output module outputs upper and lower PWM signals. The signal distribution module distributes each of the upper (lower) PWM signals alternately to the first upper (lower) switching element and the second upper (lower) switching element of corresponding one of the switching circuits. The signal adjusting module inverts all the PWM signals output by the signal output module when (1) each of currents flowing through two of the three coils has a negative value and all the three upper PWM signals are at HIGH level, or (2) each of currents flowing through two of the three coils has a positive value and all the three lower PWM signals are at LOW level.