A system and method for reducing an ASIL level of an electric vehicle motor controller

Abstract

The invention provides a system for reducing an ASIL level of an electric vehicle motor controller, and the system includes a vehicle controller, a motor controller, a battery management system, and amotor connected to the wheels, the output end of the whole vehicle controller is respectively connected with the motor controller, the battery management system is connected, the output end of the battery management system is connected with the motor controller, the three-phase current output end of the motor controller is connected with the motor, and a current Hall sensor and a resolver are connected in series between the three-phase current output end of the motor controller and the motor. The invention also provides a method for reducing the ASIL level of the electric vehicle motor controller. The invention has the beneficial effects that the ASIL level of the motor controller can be reduced on the premise of ensuring that the whole vehicle level satisfies the same ASIL level torque function safety, so that the complexity and technical difficulty of the motor controller are reduced, and the whole vehicle cost and project risk are effectively reduced.

Description

technical field [0001] The invention relates to an electric vehicle, in particular to a system and method for reducing the ASIL level of a motor controller of an electric vehicle. Background technique [0002] Due to its energy saving, emission reduction and low pollution, and with the gradual restriction of licenses in major cities, the development of the electric vehicle industry is getting better and better. Due to its environmental advantages, pure electric vehicles have become the mainstream of energy conservation and new energy development strategies. [0003] In recent years, the intelligentization, networking, and electrification of automobiles have become the future development trend of automobiles, and with the rise of unmanned autonomous driving, the overall safety of automobiles has shifted from passive safety to active safety, reducing the probability of system failures and controlling risks. [0004] With the continuous increase in the number of vehicle electr...

AI Technical Summary

Problems solved by technology

[0011] Both the motor controller and the vehicle controller in the existing design are designed for torque functional safety, but the ASIL level at the vehicle level has not been improved. The ASIL level of the vehicle is determined by the highest ASIL level of all parts of the vehicle

[0012] The disadvantage of the existing technical solutions is that both the motor controller and the vehicle controller need to achieve ASIL C level of torque function safety

High complexity and technical difficulty; high development cost and high project development risk

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