A First Aid Method for Hall Position Sensor Failure

Abstract

The invention discloses a Hall position sensor fault emergency method. After a Hall position sensor fails, a motor is not directly closed, the motor can continue working on the basis of giving an alarm, the hazard rating of the failure of the Hall position sensor is greatly reduced, and the reliability of a system is increased. The Hall position sensor fault emergency method comprises the steps that during the process when the motor runs, three routes of Hall position sensors can have eight kinds of status at most, wherein the all-zero or all-one status is the fault status, and 0 is respectively assigned to initial values; the time when the motor rotates by two ringsis used as a detection period, and if one status of the Hall position sensors appears, 1 is assigned to a corresponding variable; the value of an array is observed; when the motor fails, which one of the Hall position sensors fails is analyzed and determined by analyzing the 0 status; the failure of the one Hall position sensor is accurately positioned through software, and a user can timely and accurately replace the fault sensor according to the fault information after the system stops working.

Description

technical field [0001] The invention relates to a fault handling method of a brushless direct current motor, in particular to a first aid method for a fault of a Hall position sensor. Background technique [0002] In recent years, with the development of power electronics technology, microelectronics technology and new magnetic materials, brushless DC motors are widely used in aviation, aerospace, numerical control because of their small size, light weight, high efficiency, large torque and good speed regulation performance. Machine tools, robots and other fields have been widely used. The basic structure of a brushless DC motor consists of a motor body, a controller, and a position sensor. The function of the position sensor is to detect the position of the main rotor during the movement process, convert the position signal of the magnetic steel pole of the rotor into an electrical signal, and provide the correct commutation information for the logic switch circuit to cont...

AI Technical Summary

Problems solved by technology

This processing method is too rough. If the motor is the key component at this time, this processing method will immediately paralyze the system, which may cause disastrous consequences.

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