Method and device for fault monitoring of brushless DC motor

Abstract

The invention discloses a fault monitoring method and device for a brushless direct current motor. The method includes: acquiring the sensory information required for motor control in real time; performing fault diagnosis on the position sensor, drive circuit power tube, and winding by comparing the acquired sensory information with preset fault information, and generating a diagnosis result; The motor adjustment instruction determined by the diagnosis result is sent to the brushless DC motor control module, and the diagnosis result is sent to the upper computer. The invention solves the problem that the relevant faults cannot be continuously monitored after the brushless DC motor starts to operate, realizes the online real-time monitoring of various faults of the brushless DC motor, and can send or store fault identification results, so as to facilitate fault-tolerant control of the motor And later motor maintenance personnel to achieve rapid maintenance.

Description

technical field [0001] Embodiments of the present invention relate to fault diagnosis technology, in particular to a fault monitoring method and device for a brushless DC motor. Background technique [0002] With the development of multi-electric technology for civil aircraft, the research and application of high magnetic energy and rare earth permanent magnet materials, and the emergence of high-power semiconductor drive devices, the application of high-power brushless DC motors in fuel systems and flight control actuation systems will become more and more important. more and more common. As a kind of electromechanical equipment, brushless DC motors have hidden dangers of failure in long-term operation. Through the development of health monitoring technology for brushless DC motors, it can provide technical support for fault-tolerant control of brushless DC motors and rapid troubleshooting and maintenance of aircraft systems. [0003] In the state monitoring of high-power ...

AI Technical Summary

Problems solved by technology

[0004] After the brushless DC motor is started, although a certain degree of fault monitoring can be realized, the fault monitoring is only limited to setting several simple fault detection circuits in the motor circuit to protect the control and drive circuits of the motor. , such as DC voltage overvoltage protection, undervoltage protection and current overcurrent protection, it is impossible to monitor power tube failures, Hall sensor failures, winding failures, etc. online in real time

According to statistics, the probability of two or more failures occurring simultaneously in high-power brushless DC motors of civil aircraft is very small, and generally occurs in the form of a single failure. However, if the failure is not identified in time and appropriate fault-tolerant control or redundancy management is adopted, two failures will occur Therefore, it is of great significance to timely and effectively monitor the faults of brushless DC motors.

Images