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Vehicle motor control system and control method

A technology for motor control and vehicle use, which is used in control systems, vector control systems, motor generator control, etc., and can solve problems such as low-frequency torque ripple in motor control systems.

Active Publication Date: 2021-04-30
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a vehicle motor control system and control method to solve the problem of low-frequency torque ripple in the motor control system caused by the existing sampling aliasing phenomenon question

Method used

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  • Vehicle motor control system and control method
  • Vehicle motor control system and control method
  • Vehicle motor control system and control method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0066] This embodiment provides a vehicle motor control system, such as image 3 As shown, the vehicle motor control system is connected between the inverter and the vehicle motor, and the vehicle motor control system includes an anti-aliasing filter unit 20: the inverter is used to provide input to the vehicle motor current to drive the vehicle motor to rotate; the anti-aliasing filter unit 20 is used to obtain the filtered d-axis output current sampling value and the filtered q-axis output current of the vehicle motor according to the output current of the vehicle motor output current sampling value; the closed-loop adjustment unit of the inverter is used to adjust the input current according to the filtered d-axis output current sampling value and the filtered q-axis output current sampling value.

[0067] like image 3 As shown, in the vehicle motor control system, the vehicle motor control system also includes a traditional current sampling unit 10 and a working conditio...

Embodiment 2

[0077] This embodiment also provides a vehicle motor control method. The vehicle motor control method includes: the vehicle motor control system is connected between the inverter and the vehicle motor; Provide input current to drive the vehicle motor to rotate; the anti-aliasing filter unit 20 of the vehicle motor control system obtains the filtered d-axis output current of the vehicle motor according to the output current of the vehicle motor sampled value and filtered q-axis output current sampled value; the closed-loop adjustment unit of the inverter adjusts the input according to the filtered d-axis output current sampled value and the filtered q-axis output current sampled value current.

[0078] like image 3 As shown, the three-phase current i of the vehicle motor ABC Input to the traditional current sampling unit 10 and the anti-aliasing filter unit 20, the torque T of the vehicle motor e and speed ω r Input to the working condition discrimination unit 30; the trad...

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Abstract

The invention provides a vehicle motor control system and a control method. The vehicle motor control system is connected between an inverter and a vehicle motor, the vehicle motor control system comprises an anti-aliasing filter unit, and the inverter is used for providing an input current for a vehicle motor so as to drive the vehicle motor to rotate; the anti-aliasing filter unit is used for obtaining a filtered d-axis output current sampling value and a filtered q-axis output current sampling value of the vehicle motor according to the output current of the vehicle motor; and a closed-loop regulation unit of the inverter is used for regulating an input current according to a filtered d-axis output current sampling value and a filtered q-axis output current sampling value. According to the invention, a problem of low-frequency torque pulsation of the motor control system caused by an existing sampling aliasing phenomenon can be solved.

Description

technical field [0001] The invention relates to the technical field of vehicle motors, in particular to a vehicle motor control system and control method. Background technique [0002] The permanent magnet synchronous motor for vehicles presents a high-speed and multi-polarization development trend. However, due to the performance limitation of the IGBT power device of the inverter, the control frequency of the vehicle inverter is always kept at about 10kHz, which makes the motor run at a higher speed. When the harmonic frequency of the phase current exceeds the Nyquist frequency (half of the sampling frequency) sampled by the inverter, the phenomenon of sampling aliasing occurs, which in turn causes the control system to respond incorrectly to low-frequency signals at certain speed points. Desired control produces large low-frequency torque ripple. [0003] Taking a permanent magnet synchronous motor with 6 pole pairs as an example, figure 1 It reveals the aliasing phenom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/05H02P21/14H02P21/18H02P21/20H02P21/22H02P25/022H02P6/10H02P27/12
CPCH02P21/05H02P21/14H02P21/18H02P21/20H02P21/22H02P25/022H02P6/10H02P27/12Y02T10/72
Inventor 江尚赵万祥冯瑛袁黎君马艳丽
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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