Motor control device

Patent metadata

Field	Value
Publication number	US-12060848-B2
Application number	US-202318324241-A
Country	US
Kind code	B2
Filing date	May 26, 2023
Priority date	Aug 3, 2022
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

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.

First claim

What is claimed is:

1. A motor control device configured to control a motor, comprising:
a microcontroller
configured to determine whether a motor rotation control to rotate the motor fails;
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 microcontroller; and
configured to determine whether an abnormality has occurred in the motor based on the control failure frequency parameter.

2. The motor control device according to claim 1 , wherein the microcontroller determines whether a torque, which is applied to a rotating member fixed to the motor to rotate, increases as the abnormality.

3. The motor control device according to claim 1 , wherein
the microcontroller determines whether a preset confirmation starting condition, which indicates that the frequency of failures in the motor rotation control is high, is satisfied based on the control failure frequency parameter,
the microcontroller is further configured to execute a confirmation motor start for starting the motor so that a start of the motor is likely to fail when the preset confirmation starting condition is satisfied, and
the microcontroller determines whether an abnormality has occurred in the motor based on an execution result of the confirmation motor start by the microcontroller.

4. The motor control device according to claim 1 , the microcontroller is further configured to notify that an abnormality has occurred in the motor when the microcontroller determines that an abnormality has occurred in the motor.

5. The motor control device according to claim 1 , wherein
the microcontroller is further configured to calculate a control failure probability that is a probability of failure in the motor rotation control; and
the microcontroller is further configured to notify the control failure probability.

6. A motor control device configured to control a motor, comprising:
a microcontroller
configured to execute a confirmation motor start for starting the motor under a confirmation starting condition set in advance so that a start of the motor is likely to fail when an abnormality confirmation command is received from an external device; and
configured to determine whether an abnormality has occurred in the motor based on an execution result of the confirmation motor start by the microcontroller.

7. The motor control device according to claim 6 , which is mounted on a vehicle so as to control the motor of a fuel pump configured to pump fuel from a fuel tank storing the fuel to supply the fuel to an internal combustion engine mounted on the vehicle via a fuel pipe, wherein
in case where at least one of a temperature of the fuel tank, a temperature of the fuel pump, a temperature of the fuel, a temperature correlated with the temperature of the fuel tank, a temperature correlated with the temperature of the fuel pump, or a temperature correlated with the temperature of the fuel is equal to or higher than a preset start determination temperature, the external device transmits the abnormality confirmation command to the motor control device immediately after driving of the internal combustion engine is stopped.

Assignees

• Denso Corp

Inventors

• Seo Yuichi
• Hidaka Yuuji

Classifications

• F02D41/3082

  Control of electrical fuel pumps · CPC title

• F02D2200/0606

  Fuel temperature · CPC title

• F02D2200/50

  said parameters being related to the vehicle or its components · CPC title

• F02D2200/0602

  Fuel pressure · CPC title

• F02D41/266

  the computer being backed-up or assisted by another circuit, e.g. analogue · CPC title