Fault-tolerant control method for Hall position sensor of permanent-magnet brushless motor

Abstract

The invention discloses a fault-tolerant control method for a Hall position sensor of a permanent-magnet brushless motor, aiming to solve the technical problem of low practicality of existing fault-tolerant control methods for Hall position sensors of permanent-magnet brushless motors. The technical scheme of the fault-tolerant control method includes the steps of identifying three Hall position sensor output sequences during forward and backward rotation of the permanent-magnet brushless motor firstly; outputting signals to the Hall position sensor to determine fault positions and shield fault signals; if the actual rotation direction of the permanent-magnet brushless motor is identical to a given rotation direction, performing fault-tolerant control on the Hall position sensor of the permanent-magnet brushless motor according to a position compensation method; if the actual rotation direction of the permanent-magnet brushless motor is different from the given rotation direction, restarting the motor according to an advanced phase change method to keep the actual rotation direction identical to the given rotation direction. The fault-tolerant control method has the advantages thatfault-tolerant control is realized by the position compensation method, torque ripples are reduced, normal working of the permanent-magnet brushless motor is guaranteed, the reliability of a full-electric braking system of an airplane is improved, and the practicality is high.

Description

technical field [0001] The invention relates to a fault-tolerant control method, in particular to a fault-tolerant control method of a Hall position sensor of a permanent magnet brushless motor. Background technique [0002] With the rapid development of the aviation industry, the all-electric aircraft (AEA All-Electric-Aircraft) has become the development direction of the future aviation industry. As one of the core technologies of all-electric aircraft, all-electric brakes have a direct impact on whether the aircraft can operate safely. Most aircraft use permanent magnet brushless motors as servo motors for all-electric braking systems, and have achieved good results. However, during the braking process of the aircraft, affected by the high temperature of the external environment, corrosion, strong earthquakes, electromagnetic interference and poor contact, the output signal of the Hall position sensor will malfunction, making the output signal abnormal, resulting in perm...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of poor practicability of the existing permanent magnet brushless motor Hall position sensor fault-tolerant control method, the present invention provides a permanent magnet brushless motor Hall position sensor fault-tolerant control method

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