Safety monitoring circuit and control method of a vehicle motor controller

Abstract

The invention relates to an automotive motor controller security monitoring circuit and a control method thereof. The automotive motor controller security monitoring comprises a chip power supply circuit, a chip monitoring circuit, a fault diagnosis circuit and a PWM (pulse-width modulation) interlock circuit. Status monitoring which is critical to security is achieved by means of the simple security monitoring circuit; even when in abnormal state, the controller can be protected in time; therefore, reliability of the controller and riding safety of vehicle are improved. In addition, the PWM interlock circuit can also prevent switching tubes from shoot-through and further improve reliability of the controller.

Description

technical field [0001] The invention relates to a safety monitoring circuit of a vehicle motor controller and a control method thereof. Background technique [0002] The automobile industry is a pillar industry of the national economy. It is closely related to people's life and has become an indispensable part of modern society. However, the traditional automobile industry, which uses petroleum as fuel, not only provides people with fast and comfortable means of transportation, but also increases the dependence of the national economy on fossil energy and deepens the contradiction between energy production and consumption. With the continuous increase of the dual pressure of resources and environment, the development of new energy vehicles has become the direction of the future development of the automobile industry. Recently, my country released the "Energy Saving and New Energy Automobile Industry Planning (2011-2020)". Master the key core technologies of energy saving an...

AI Technical Summary

Problems solved by technology

[0004] At present, the motor controllers of new energy vehicles generally have over-current, under-voltage, over-voltage, over-temperature and over-speed protections inside. In addition, the motor controllers generally also have a watchdog circuit to prevent software from running away, but none of them can protect against Monitor the running status of the on-chip memory, CPU, and on-chip peripherals of the main control chip

Once the on-chip operation of the main control chip is wrong, the motor main controller will work abnormally, which will pose a threat to the safety of drivers and passengers

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