A brushless DC motor hall sensor real-time fault identification and reconstruction system and method

Abstract

The invention relates to a real-time fault identification and reconstruction system and method for a hall sensor of a brushless direct current motor, in particular to a real-time fault identification,reconstruction and protection method for a hall signal of the brushless direct current motor. The real-time fault identification and reconstruction system and method for the hall sensor of the brushless direct current motor are suitable for various brushless direct current motors of high-speed (high speed means the running state of the brushless direct current motor after starting) running. According to the method, in the running state of the brushless direct current motor, faults of the hall sensor of the brushless direct current motor can be recognized in real time, and hall signal reconstruction can be completed. It is only required that one phase of the hall signal of the brushless direct current motor is correct, other hall signals can be reconstructed, and normal work of the high-speed motor is ensured; when all hall signals are subjected to faults, it can be ensured that the overcurrent phenomenon cannot occur on the motor, and motor safety is ensured. Compared with a traditional control method for the brushless direct current motor, the method can greatly improve the driving reliability of the brushless direct current motor.

Description

technical field [0001] The invention relates to a system and method for real-time fault identification and reconstruction of a Hall sensor of a brushless DC motor, in particular to a method for real-time fault identification, reconstruction and fault protection of a Hall signal of a brushless DC motor, which is applicable to various types of high-speed ( High-speed refers to the running state of the brushless DC motor after starting) the brushless DC motor running. Background technique [0002] The faults of the brushless DC motor drive control system mainly include motor winding faults, motor Hall sensor faults, inverter faults, etc. [0003] The brushless DC motor needs to complete the electronic commutation through the Hall sensor to realize the drive control of the brushless DC motor. If the Hall signal of the Hall sensor is abnormal, it will cause abnormal opening of the motor winding, generate a large current, and even burn the motor. Therefore, it is very important ...

AI Technical Summary

Problems solved by technology

[0004] In some applications, such as the control moment gyro (CMG) used by spacecraft, the Hall signal of its high-speed brushless DC motor is transmitted through a conductive slip ring. During long-term operation, the Hall signal will be interrupted occasionally and the whole machine will fail.

In applications that do not use conductive slip rings, the Hall signal output will be abnormal due to the fault of the Hall device itself and the false welding of the Hall signal lead. Therefore, it is necessary to study the real-time fault identification and reconstruction of the Hall sensor of the brushless DC motor. method is necessary

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