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Motor control device and motor control method

A technology of motor control and control mode, which is applied in the control drive, power management, electric vehicle and other directions, and can solve the problems of untimely and inaccurate fault detection.

Active Publication Date: 2019-08-09
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims to propose a motor control device to solve the problem of inaccurate and untimely detection of faults in existing methods

Method used

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  • Motor control device and motor control method
  • Motor control device and motor control method
  • Motor control device and motor control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] This embodiment provides a motor control device, such as figure 1 As shown, the motor control device 11 is connected to an inverter 12 , and the inverter 12 is connected to a motor 13 . Such as figure 2 As shown, the motor control device 11 includes: a preparation unit 111 , a control mode selection unit 112 , a first rotational speed judging unit 113 and a second rotational speed judging unit 114 .

[0065] Wherein, the preparation unit 111 is used to perform initialization, insulation detection and pre-charging operations on the inverter 12 in sequence.

[0066] The control mode selection unit 112 is connected to the preparation unit 111 , and the control mode selection unit 112 is used for judging the state of the motor 13 after the inverter 12 is initialized, meets insulation requirements and pre-charging is completed. If the motor 13 is in the driving state, the motor control device 11 enters the torque mode; if the motor 13 is in the shifting state, the motor c...

Embodiment 2

[0104] This embodiment provides a motor control method, such as Figure 4 As shown, the motor control method includes the following steps:

[0105] Step S1: Perform initialization, insulation detection and pre-charging on the inverter in sequence. After the inverter is initialized, meets the insulation requirements and the pre-charging is completed, go to step S2. Specifically, this step can be completed by using the preparation unit 111 in the motor control device 11 .

[0106] Step S2: Determine the state of the motor, if the motor is in the driving state, go to step S3, if the motor is in the shifting state, go to step S4. Specifically, this step can be completed by using the control mode selection unit 112 in the motor control device 11 .

[0107] Step S3: judging whether the rotational speed of the motor is greater than the calibration value of the rotational speed, and if so, making the motor control device enter a safe pulse off state. Specifically, this step can be ...

Embodiment 3

[0127] This embodiment provides a driving motor system, such as figure 1 As shown, the driving motor system includes: a motor control device 11 , an inverter 12 and a motor 13 . The driving motor system may also include: a power battery pack 14 .

[0128] Wherein, the motor control device 11 is the motor control device provided in Embodiment 1, and the communication between the motor control device 11 and the vehicle controller in the vehicle system is realized through the CAN bus, and the motor control device 11 is used to output PWM control Signal.

[0129] The power battery pack 14 is used to provide direct current.

[0130] The inverter 12 is respectively connected with the motor control device 11 and the power battery pack 14, and the inverter 12 is used to convert the direct current provided by the power battery pack 14 into Three-phase alternating current.

[0131] The motor 13 is connected to the inverter 12 and operates under the drive of the three-phase alternati...

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Abstract

The invention provides a motor control device and a motor control method and relates to the technical field of automobile electronic control. Fault detection accuracy and timeliness can be improved. The motor control device comprises a preparation unit, a control mode selection unit, a first rotation speed judgment unit and a second rotation speed judgment unit. The control mode selection unit is used for judging the state of a motor, making the motor control device get into a torque mode if the motor is in a drive state and making the motor control device get into a rotation speed mode if the motor is in a gear shifting state. The first rotation speed judgment unit is used for judging whether the rotation speed of the motor is larger than a rotation speed calibration value or not after the motor control device gets into the torque mode, and if the rotation speed of the motor is larger than the rotation speed calibration value, the motor control device gets into a safety pulse turn-off state. The second rotation speed judgment unit is used for judging whether the rotation speed of the motor exceeds the peak rotation speed or not after the motor control device gets into the rotation speed mode, and if the rotation speed of the motor exceeds the peak rotation speed, the motor control device gets into the safety pulse turn-off state. The motor control device is used for controlling the motor to run.

Description

technical field [0001] The invention relates to the technical field of automotive electronic control, in particular to a motor control device and a motor control method. Background technique [0002] With the call of the country to vigorously promote energy conservation and environmental protection, the development technologies of many new energy and new energy-using products are becoming more and more mature. In the automotive field, pure electric vehicles and hybrid vehicles have gradually been applied. One of the main problems to be solved in the application of pure electric vehicles and hybrid electric vehicles is: how to ensure the functional safety of the whole vehicle system. The vehicle system includes the vehicle controller, drive motor system, automatic transmission system and body electronic stability system. [0003] One of the main factors affecting the functional safety of the vehicle system is the functional safety of the drive motor system. At present, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L15/20
CPCY02T10/72
Inventor 赵荣国刘庆阳赵越周元晨周立强
Owner GREAT WALL MOTOR CO LTD