Drive protection method, bridge drive system and motor controller

Abstract

The invention relates to the field of drive technology, and provides a drive protection method based on MCU and CPLD, a bridge drive system and a motor controller. The drive protection method of the present invention comprises: controlling the MCU module to send the upper bridge drive signal and the lower bridge drive signal to the upper bridge output module and the CPLD module respectively; controlling the CPLD module to send the lower bridge drive signal to the lower bridge output module; configuring the MCU module for controlling both the high-side enable module and the low-side enable module; and configuring the CPLD module for controlling both the high-side enable module and the low-side enable module. The method also includes: establishing communication between the MCU module and the CPLD module, and based on the established communication, performing verification on the CPLD module at the MCU module side and performing verification on the MCU module at the CPLD module side. The invention realizes the perfect cooperation between the MCU and the CPLD, which can separately control the upper and lower bridge arms of the drive system to avoid direct connection of the upper and lower bridges, and can also check each other based on the communication relationship to form redundant protection.

Description

technical field [0001] The invention relates to the field of drive technology, in particular to a drive protection method based on a microprocessor (Microcontroller Unit, MCU) and a complex programmable logic device (Complex Programmable Logic Device, CPLD), a bridge drive system and a motor controller. Background technique [0002] As we all know, for some electrical equipment, especially the equipment driven by motors, the drive protection technology is very important, and it is an important technical means to ensure the normal operation of the equipment. One of the most widespread applications of drive protection technology is in motor controllers for vehicles. [0003] With the increasing number of new energy vehicles in China and people's higher and higher requirements for safe driving motor technology, the safety control and safety protection mechanism of the motor controller has become the industry development trend, that is, when the vehicle is driving at high speed,...

AI Technical Summary

Problems solved by technology

[0005] 1) The MCU directly controls the drive PWM wave output and shutdown mode for protection, and this drive protection mode is often not timely;

[0006] 2) Protection is carried out through the combination of MCU and hardware logic gate circuit. The hardware logic gate circuit of this drive protection method is often not programmable, and it is not flexible to match with MCU;

[0007] 3) The CPLD is used to protect and control the output and shutdown of the drive PWM wave for protection. Although this kind of protection is fast and timely, once the CPLD has a problem, the safety of the driving system cannot be guaranteed;

[0008] 4) MCU and CPLD are jointly matched and combined for protection, but how to realize the perfect cooperation between MCU and CPLD is very important. Once the cooperation is not good, it will still cause the upper and lower bridges to break through the controller

If there is not a perfect cooperation mechanism between the MCU and CPLD to realize the protection action, it is easy to cause the upper and lower bridges to pass through, thus burning the motor controller and endangering the driving safety of the whole vehicle

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