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：US20200321769A1

公开(公告)日：2020-10-08

申请号：US16835841

申请日：2020-03-31

Applicant: DENSO CORPORATION

Inventor： Kouichi NAKAMURA ,  Hideki KABUNE ,  Atsuko OKA

IPC: H02H3/28 ,  H02H7/08

Abstract: In a control device, control circuit units are connected to separate circuit power sources and to separate grounds. Ground monitor circuits respectively have a first resistor with one end connected to a voltage source, a second resistor with one end connected to an input terminal of a corresponding control circuit unit, and a capacitor. Among the one end of the first resistor, an other end of the first resistor, and the other end of the second resistor, at least one is connected to the subject system, and at least one is connected to an other system, and the control circuit unit monitors a ground abnormality of the other system based on a terminal voltage of the input terminal to which the second resistor is connected.

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：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：US20140176027A1

公开(公告)日：2014-06-26

申请号：US14140922

申请日：2013-12-26

Applicant: DENSO CORPORATION

Inventor： Akimasa OSAKI ,  Kiyoshi FUJII ,  Hideki KABUNE ,  Kouichi NAKAMURA

IPC: H02P6/00

CPC classification number: H02P6/002 ,  H02P6/28 ,  H02P21/05 ,  H02P27/08

Abstract: In a system, a triangular carrier wave is compared in magnitude with first and second two-phase modulated command signals. Based on a result of the comparison, on-off operations of the high- and low-side switching elements of two phases of a three-phase inverter corresponding to the first and second two-phase modulated command signals are performed while the high- and low-side switching elements of the remaining phase of the three-phase inverter is fixed to be on or off. A value of a current flowing through a first or second bus connected between a DC power source and the three-phase inverter is measured when a local peak of the triangular carrier signal occurs while none of the high-side switching elements of all the three-phases are on or none of the low-side switching elements of all the three-phases are on.

Abstract translation: 在一个系统中，三角载波的大小与第一和第二两相调制命令信号进行比较。 基于比较的结果，执行与第一和第二两相调制命令信号相对应的三相逆变器的两相的高侧和低侧开关元件的开 - 关操作， 三相逆变器的剩余相的低侧开关元件被固定为开或关。 当三角载波信号的局部峰值出现时，测量流过连接在直流电源和三相逆变器之间的第一或第二总线的电流的值，而所有三相载波信号的高侧开关元件没有一个， 所有三相的低侧开关元件都接通或不接通。