Turn-to-turn short circuit fault diagnosis method, storage medium and electronic equipment

Abstract

The invention provides a turn-to-turn short circuit fault diagnosis method, a storage medium and electronic equipment. The method comprises the following steps: determining a theoretical electromagnetic torque of a permanent magnet synchronous motor; determining the actual electromagnetic torque of the permanent magnet synchronous motor; and when the permanent magnet synchronous motor meets a preset condition, determining a frequency doubling alternating current component according to the theoretical electromagnetic torque and the actual electromagnetic torque of the permanent magnet synchronous motor, comparing the amplitude of the frequency doubling alternating current component with a preset threshold value, and judging whether the permanent magnet synchronous motor has a turn-to-turn short circuit fault or not according to a comparison result. According to the embodiment, diagnosis can be carried out at the early stage of the turn-to-turn short circuit, the fault degree is prevented from being increased, the turn-to-turn short circuit fault is prevented from being further deteriorated into a grounding short circuit fault or an interphase short circuit fault, and the working safety and reliability of the motor are improved.

Description

technical field [0001] The invention relates to the technical field of motor fault diagnosis, in particular to a fault diagnosis method for inter-turn short circuit, a storage medium and electronic equipment. Background technique [0002] Affected by electromagnetic pulse, mechanical stress, abnormal temperature and other factors, the stator winding of permanent magnet synchronous motor may experience short circuit caused by insulation failure. In addition, improper manufacturing and assembly, industrial environment corrosion and other factors are also likely to cause short circuit faults between stator turns of permanent magnet synchronous motors. Generally speaking, the inter-turn short-circuit fault of the stator usually manifests as a gradual process of slowly degrading insulation capacity. When the insulation capacity of the winding is reduced to a certain extent, weak external stress (such as overheating, vibration, voltage shock, etc.) may cause a local inter-turn sh...

AI Technical Summary

Problems solved by technology

In the initial fault stage, the voltage and current signals of the motor are relatively weakly affected by the fault, so the protection action cannot be triggered; and when the fault deteriorates to a complete short circuit, or even a serious phase-to-phase or phase-to-ground short circuit, the inside of the motor is severely damaged. At this time, the protection It's too late

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