公开(公告)号：US10411574B2

公开(公告)日：2019-09-10

申请号：US15590533

申请日：2017-05-09

Applicant: DENSO CORPORATION

Inventor： Kotaro Nakashima

IPC: H02K17/30 ,  H02K23/66 ,  G01D5/14 ,  H02K9/06 ,  H02K21/04 ,  H02M7/5387 ,  H02K3/28 ,  H02K5/22 ,  H02K11/33 ,  H02M1/32

Abstract: An electronic control unit includes two inverters, a magnetic sensor, a failure detection unit, an inverter driving unit, a signal examination unit, and a failed element identification unit. The magnetic sensor detects a magnetic flux generated around a winding. The failure detection unit detects an ON-state failure of the inverter. When the ON-state failure is detected, the inverter driving unit stops driving the inverter to which the ON-state failure has been detected, and continues driving the other inverter. The signal examination unit examines a presence or absence of a special signal. When there is a signal appearing according to a special magnetic flux, the failed element identification unit identifies a failed switching element based on a motor electric angle generated by the signal.

公开(公告)号：US11018611B2

公开(公告)日：2021-05-25

申请号：US15941343

申请日：2018-03-30

Applicant: DENSO CORPORATION

Inventor： Kotaro Nakashima ,  Nobuyori Nakajima ,  Takafumi Sato ,  Akira Takesaki ,  Takashi Suzuki

IPC: H02P21/22 ,  H02P27/08 ,  H02P21/00 ,  B62D5/04 ,  H02P29/024 ,  H02P21/06

Abstract: A control apparatus for a multi-phase rotating electric machine includes at least one electric power converter, a command value calculator and an input voltage determiner. The at least one electric power converter converts DC power into multi-phase AC power and supplies the multi-phase AC power to the rotating electric machine. The command value calculator calculates command values for operating the at least one electric power converter. The input voltage determiner determines whether an input voltage of the at least one electric power converter is within a normal operation range. When the input voltage is determined by the input voltage determiner to be outside the normal operation range, the control apparatus switches control to ignore voltage change or current change caused by the reverse input of an external force to the rotating electric machine from a load side or suppress control fluctuation caused by the reverse input of the external force.

公开(公告)号：US10605837B2

公开(公告)日：2020-03-31

申请号：US15902385

申请日：2018-02-22

Applicant: DENSO CORPORATION

Inventor： Kotaro Nakashima ,  Takashi Suzuki ,  Masaya Taki ,  Yohei Kaneda

IPC: G01R19/03 ,  G01R19/00 ,  G01R31/327 ,  G01R31/00 ,  G01R31/40

Abstract: An abnormality diagnosis apparatus performs: a first step of diagnosing a shortage of precharge voltage or a short-circuit failure between electrodes of a capacitor based on a detection value of a precharge voltage detection circuit in a state where a first relay and a second relay are turned off, and a precharge circuit is operated; a second step of diagnosing, after a normal determination in the first step, a disconnection failure of a precharge path based on the detection value of the precharge voltage detection circuit or a detection value of an inter-relay voltage detection circuit in a state where the first relay and the second relay are turned off, and the precharge circuit is not operated; and a relay failure diagnosis step of diagnosing, after a normal determination in the second step, a short-circuit failure and an open failure of the first relay or the second relay.

公开(公告)号：US20180238935A1

公开(公告)日：2018-08-23

申请号：US15902385

申请日：2018-02-22

Applicant: DENSO CORPORATION

Inventor： Kotaro Nakashima ,  Takashi Suzuki ,  Masaya Taki ,  Yohei Kaneda

IPC: G01R19/00

CPC classification number: G01R19/003 ,  G01R31/006 ,  G01R31/3278 ,  G01R31/40

Abstract: An abnormality diagnosis apparatus performs: a first step of diagnosing a shortage of precharge voltage or a short-circuit failure between electrodes of a capacitor based on a detection value of a precharge voltage detection circuit in a state where a first relay and a second relay are turned off, and a precharge circuit is operated;, a second step of diagnosing, after a normal determination in the first step, a disconnection failure of a precharge path based on the detection value of the precharge voltage detection circuit or a detection value of an inter-relay voltage detection circuit in a state where the first relay and the second relay are turned off, and the precharge circuit is not operated; and a relay failure diagnosis step of diagnosing, after a normal determination in the second step, a short-circuit failure and an open failure of the first relay or the second relay.

公开(公告)号：US20180287538A1

公开(公告)日：2018-10-04

申请号：US15941343

申请日：2018-03-30

Applicant: DENSO CORPORATION

Inventor： Kotaro Nakashima ,  Nobuyori Nakajima ,  Takafumi Sato ,  Akira Takesaki ,  Takashi Suzuki

IPC: H02P21/22 ,  H02P27/08 ,  H02P29/024 ,  H02P21/00 ,  B62D5/04

Abstract: A control apparatus for a multi-phase rotating electric machine includes at least one electric power converter, a command value calculator and an input voltage determiner. The at least one electric power converter converts DC power into multi-phase AC power and supplies the multi-phase AC power to the rotating electric machine. The command value calculator calculates command values for operating the at least one electric power converter. The input voltage determiner determines whether an input voltage of the at least one electric power converter is within a normal operation range. When the input voltage is determined by the input voltage determiner to be outside the normal operation range, the control apparatus switches control to ignore voltage change or current change caused by the reverse input of an external force to the rotating electric machine from a load side or suppress control fluctuation caused by the reverse input of the external force.