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

A technology of inter-turn short circuit fault and diagnosis method, applied in the field of motor fault diagnosis, can solve problems such as failure to trigger protection action, motor damage, etc., to avoid voltage imbalance at motor terminals and motor resistance changes, real-time diagnosis, and improve safety. Effects of Sex and Reliability

Pending Publication Date: 2021-11-23
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

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Effect test

Embodiment 1

[0053] figure 1 It is a flowchart of a method for diagnosing a turn-to-turn short circuit fault of a permanent magnet synchronous motor according to an exemplary embodiment of the present application. Such as figure 1 As shown, an embodiment of the present application provides a method for diagnosing a turn-to-turn short circuit fault of a permanent magnet synchronous motor, including the following steps:

[0054] S110: Determine the theoretical electromagnetic torque of the permanent magnet synchronous motor.

[0055] In one embodiment, determining the theoretical electromagnetic torque of the permanent magnet synchronous motor includes: determining the difference between the direct axis inductance and the quadrature axis inductance of the permanent magnet synchronous motor, and according to the difference, the d-axis current in the dq coordinate system Component and the current component of the q-axis under the dq coordinate system determine the electromagnetic torque gene...

Embodiment 2

[0087] Embodiments of the present application provide a storage medium storing a computer program. When the computer program is executed by a processor, the method for diagnosing an inter-turn short circuit fault of a permanent magnet synchronous motor as described above is implemented.

[0088] In this embodiment, the above-mentioned storage medium may include but not limited to: U disk, read-only memory (ROM, ReadOnly Memory), random access memory (RAM, Random Access Memory), EEPROM, flash memory or other memory technologies, CD- ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cartridges, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and that can be accessed by a computer.

Embodiment 3

[0090] Embodiments of the present application provide an electronic device, including a processor and a storage medium storing program codes. When the program codes are executed by the processor, the method for diagnosing inter-turn short circuit faults of permanent magnet synchronous motors as described above is implemented.

[0091] Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices In one embodiment, they can be realized by executable program codes of computing devices, thus, they can be stored in storage devices and executed by computing devices, or they can be made into individual integrated circuit modules, or Multiple modules or steps among them are realized by making a single integrated circuit module. As such, the prese...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/52G01R31/34G01R31/72
CPCG01R31/52G01R31/343G01R31/72
Inventor 赵岸峰文宇良李程石煜胡亮付翔宇南永辉
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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