公开(公告)号：US20240044338A1

公开(公告)日：2024-02-08

申请号：US18324247

申请日：2023-05-26

Applicant: DENSO CORPORATION

Inventor： Yuichi SEO ,  Yuuji HIDAKA

IPC: F04D27/02 ,  H02P29/032

CPC classification number: F04D27/0261 ,  H02P29/032

Abstract: A motor control device configured to control a motor that drives a fuel pump includes a sign detection unit and a vapor suppression unit. The sign detection unit is configured to detect a sign of a vapor lock that is an abnormality in which the fuel pump is unable to discharge a fuel due to a vapor inside the fuel pump. The vapor suppression unit is configured to change a rotation speed of the motor to reduce the vapor inside the fuel pump when the sign detection unit detects the sign of the vapor lock.

公开(公告)号：US20240048084A1

公开(公告)日：2024-02-08

申请号：US18324222

申请日：2023-05-26

Applicant: DENSO CORPORATION

Inventor： Yuichi SEO ,  Yuuji HIDAKA

IPC: H02P29/028 ,  G08B21/18 ,  G07C5/08 ,  F02D41/22

CPC classification number: H02P29/028 ,  G08B21/187 ,  G07C5/0808 ,  F02D41/221 ,  F04D27/001

Abstract: A motor control device includes: a rotation control determination unit configured to determine whether a motor rotation control to rotate the motor fails; a parameter calculation unit configured to calculate a control failure frequency parameter having a correlation with a frequency of failure in the motor rotation control based on a determination result by the rotation control determination unit; an abnormality determination unit configured to determine whether an abnormality has occurred in the motor based on the control failure frequency parameter; and a stop suppression unit configured to suppress stop of rotation of the motor by changing a motor control parameter to perform the motor rotation control when the abnormality determination unit determines that an abnormality has occurred in the motor.

公开(公告)号：US20240044301A1

公开(公告)日：2024-02-08

申请号：US18324241

申请日：2023-05-26

Applicant: DENSO CORPORATION

Inventor： Yuichi SEO ,  Yuuji HIDAKA

IPC: F02D41/22 ,  F02D41/30

CPC classification number: F02D41/221 ,  F02D41/3082 ,  F02D2200/0606 ,  F02D2200/50

Abstract: A motor control device includes: a rotation control determination unit configured to determine whether a motor rotation control to rotate the motor fails; a parameter calculation unit configured to calculate a control failure frequency parameter having a correlation with a frequency of failure in the motor rotation control based on a determination result by the rotation control determination unit; and an abnormality determination unit configured to determine whether an abnormality has occurred in the motor based on the control failure frequency parameter.

公开(公告)号：US20230261598A1

公开(公告)日：2023-08-17

申请号：US18057893

申请日：2022-11-22

Applicant: DENSO CORPORATION

Inventor： Yuichi SEO

IPC: H02P23/14 ,  H02P3/18 ,  H02P27/08

CPC classification number: H02P23/14 ,  H02P3/18 ,  H02P27/08

Abstract: A motor control device performs driving control of a motor via a drive circuit that converts a power supply voltage of a direct current power supply into a drive voltage of the motor. The motor control device includes a voltage measurement circuit that measures the power supply voltage. The motor control device acquires a detection signal correlated with a current value that is output from a current detection circuit.

公开(公告)号：US20220239245A1

公开(公告)日：2022-07-28

申请号：US17564990

申请日：2021-12-29

Applicant: DENSO CORPORATION

Inventor： Yuichi SEO

IPC: H02P23/14 ,  H02P27/08 ,  G01R19/175

Abstract: An arithmetic device and a motor drive device including the arithmetic device capable of performing high accuracy motor current calculation, include a control unit performing an arithmetic processing including: acquire a duty ratio; calculate a waiting time according to the duty ratio and a waiting coefficient; detect a shunt current value at a detection timing after lapse of the waiting time; acquire, as a zero-cross current value, the shunt current value; calculate an average value using the shunt current values; and calculate an effective current value by correcting the average value using a correction coefficient.