Hall sensor-based fault-tolerant control method of permanent magnet brushless motor

Abstract

The invention relates to the field of permanent magnet brushless motor control systems, in particular to a Hall sensor-based fault-tolerant control method of a permanent magnet brushless motor. The invention aims at solving the problem of Hall fault caused by the mechanical vibration and line interface falling off of the motor in an operation process of the permanent magnet brushless motor based on a Hall position sensor. The Hall sensor-based fault-tolerant control method of the permanent magnet brushless motor comprises the steps of determining a Hall jumping edge type at any Hall jumping edge moment, sampling a corresponding Hall state, and determining a concrete Hall fault type; solving fault-tolerant running speed of the motor according to the single-Hall fault type and the double-Hall fault type, and further estimating high-resolution fault-tolerant rotor position information by means of a reduced-order observer so as to carry out the double-closed-loop control for current and running speed as well as vector control; using a space vector module to output a modulated wave so as to control the on and off of a corresponding power tube of an inverter bridge. The Hall sensor-based fault-tolerant control method of the permanent magnet brushless motor is used for single-Hall-sensor or double-Hall-sensor based fault-tolerant control for the permanent magnet brushless motor.

Description

technical field [0001] The invention relates to the field of permanent magnet brushless motor control based on a Hall position sensor, in particular to a Hall sensor fault-tolerant control method for a permanent magnet brushless motor. Background technique [0002] The Hall position sensor is used as the rotor position detection element of the permanent magnet brushless motor. In the control of the brushless DC motor, the Hall sensor provides six commutation positions in each electrical cycle, so as to realize the second, second, and third conduction of the brushless DC motor. Phase six-state control mode; in the control process of permanent magnet synchronous motor, vector control requires high-resolution rotor position information, so Hall position sensors are needed to estimate high-resolution rotor position information. [0003] Based on the Hall position sensor, during the operation of the permanent magnet brushless motor, the Hall failure problem is caused by mechanica...

AI Technical Summary

Problems solved by technology

[0003] Based on the Hall position sensor, during the operation of the permanent magnet brushless motor, the Hall failure problem is caused by mechanical vibration and line interface detachment, which makes the motor suddenly stagnate or the motor stalls during normal operation. This failure will cause irreparable problems in production. consequences, even pose a threat to the safety of technicians, therefore, the fault-tolerant control technology based on the Hall position sensor plays a vital role in the actual control system

Images