公开(公告)号：US20210046974A1

公开(公告)日：2021-02-18

申请号：US16986624

申请日：2020-08-06

Applicant: DENSO CORPORATION

Inventor： Hiroyasu OOTAKE ,  Nobuyori NAKAZIMA ,  Kouichi NAKAMURA

IPC: B62D5/04 ,  H02P25/22 ,  H02P21/05 ,  H02P27/08

Abstract: Control circuits control inverter circuits provided in correspondence to the control circuits by a drive mode selected from a plurality of drive modes. A cooperative drive mode is for controlling a current supply to motor windings by a plurality of systems by using a value acquired from the other control circuit via communication. An independent drive mode is for controlling the current supply to the motor windings by the plurality of systems without using the value acquired from the other control circuit. A one-system drive mode is for controlling the current supply to the motor winding by one system without using the value acquired from the other control circuit. The control circuits set the drive mode to a cooperative drive mode when inter-computer communication is normal. The control circuits set the drive mode to an independent drive mode or a one-system drive mode thereby differentiating an output characteristic of a motor from that in the cooperative drive mode.

公开(公告)号：US20220224275A1

公开(公告)日：2022-07-14

申请号：US17657068

申请日：2022-03-29

Applicant: DENSO CORPORATION

Inventor： Kouichi NAKAMURA ,  Nobuyori NAKAZIMA ,  Go ENDOH

IPC: H02P29/024 ,  B62D5/04

Abstract: A current detection unit includes current detection elements provided to phases on a high potential side of an upper arm element or on a low potential side of a lower arm element. A detection target element is the upper arm element or the lower arm element to which the current detection elements are provided. A target duty is a duty ratio of the detection target element. The control unit includes a current acquisition unit, an energization control unit, and an abnormality determination unit. The current acquisition unit acquires a current detection value from the current detection unit. The abnormality determination unit performs an abnormality determination based on the current detection value. The abnormality determination unit varies a determination threshold, which is used for the abnormality determination based on the current detection value, according to the target duty.

公开(公告)号：US20200317258A1

公开(公告)日：2020-10-08

申请号：US16835844

申请日：2020-03-31

Applicant: DENSO CORPORATION

Inventor： Kouichi NAKAMURA ,  Nobuyori NAKAZIMA

IPC: B62D5/04 ,  H02P27/06 ,  H02P29/024 ,  H02P25/024 ,  H02P25/22

Abstract: A rotary electric machine control device is provided to control a motor having motor winding sets and includes a plurality of inverter circuits and a plurality of control circuits capable of mutual communication. The inverter circuits switch over the current supply to the motor winding sets. The control circuits include driver control sections, which control the inverter circuits provided correspondingly, and abnormality monitor sections, which monitor the abnormality. The abnormality monitor sections monitor the abnormality of the own system and the other system based on the plurality of abnormality information. The driver control sections change a control mode according to the abnormal state. It is thus possible to control the driving of the motor appropriately based on the abnormality state.

公开(公告)号：US20200317257A1

公开(公告)日：2020-10-08

申请号：US16835781

申请日：2020-03-31

Applicant: DENSO CORPORATION

Inventor： Hiroyasu OOTAKE ,  Nobuyori NAKAZIMA

IPC: B62D5/04 ,  H02P27/06

Abstract: A motor control device controls energization of a motor by interchangeably converting a direct current electric power of a power source and an alternating current electric power of the motor with a power conversion circuit according to a power running operation and a regeneration operation of the motor.A voltage instruction value calculation unit calculates a q-axis voltage instruction value and a d-axis voltage instruction value by feedback control of dq-axis currents. A voltage instruction value limit unit limits at least one of the q-axis voltage instruction value and the d-axis voltage instruction value. The voltage instruction value limit unit performs a q-axis voltage limit prioritize process for limiting the q-axis voltage instruction value over the d-axis voltage instruction value, or a d-axis voltage limit prioritize process for limiting the d-axis voltage instruction value over the q-axis voltage instruction value, during the regenerative operation of the motor.