Power-on self-repairing method for brushless direct-current motor hall sensor

Abstract

The invention relates to a power-on self-repairing method for a brushless direct-current motor hall sensor. The hall sensor is detected in real time, and change-over is carried out in a signal estimating mode during a fault determining period, so that influences of a detection process on performance of a motor are emitted after faults occur. After the faults are detected and determined, a fault operation mode is switched, and the problem that system faults are caused due to the fact that the hall sensor is suddenly damaged in the operation process of a brushless direct-current motor is eliminated. Meanwhile, signals of the damaged hall sensor are repaired as much as possible through undamaged hall sensors to guarantee that the motor normally runs under sudden failure, and stability and safety of a system are enhanced. By means of the method, fault detection, judgment and repairing of the hall sensor in the running process of the motor can be achieved, and the problem that the system faults are caused due to the fact that the hall sensor is suddenly damaged in the operation process of the brushless direct-current motor is solved.

Description

technical field [0001] The invention belongs to the technical field of motor control, and relates to a motor fault repairing device, in particular to a power-on self-repairing method for a Hall sensor of a brushless DC motor. Background technique [0002] Brushless DC motor is a new type of integrated motor produced with the development of modern power electronics technology. It has the advantages of simple structure, good speed regulation performance, high work efficiency, and low operating noise. The brushless DC motor is mainly composed of three parts: the motor body, the rotor position detection circuit, the electronic switch circuit and its control circuit. figure 1 Shown is the schematic diagram of the most commonly used three-phase full-control operation circuit. [0003] The rotor position detection circuit and the electronic switch circuit cooperate to complete the commutation action, which is equivalent to the brush and commutator in the brushed DC motor, and is a...

AI Technical Summary

Problems solved by technology

The patent application No. 201310312331.4 requires the motor to continue to rotate two turns after the Hall sensor fails to detect the fault point. During the fault detection process, the motor will experience a decrease in speed due to commutation failure, and the system stability will decrease. The repair part after failure does not point out the specific method, which is of little practical significance

The rotor position estimation method proposed by the patent application number 201310374110.X for Hall sensor failure is too complicated, resulting in complicated procedures and low efficiency

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