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Method and device for monitoring turn-to-turn residual insulation of a permanent magnet motor and storage medium

A permanent magnet motor, inter-turn short-circuit technology, applied in short-circuit test, measurement device, motor generator test, etc., can solve the problems of weak initial fault characteristics and untimely judgment results of inter-turn short circuit

Active Publication Date: 2021-10-26
HUNAN UNIV
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Problems solved by technology

This method usually needs to set a high threshold to prevent wrong diagnosis, but the initial fault characteristics of inter-turn short circuit are extremely weak, so in this type of research, the insulation resistance is usually selected close to 0, that is, the situation of complete short circuit, which leads to the model-based The method of judging the result is not timely

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  • Method and device for monitoring turn-to-turn residual insulation of a permanent magnet motor and storage medium
  • Method and device for monitoring turn-to-turn residual insulation of a permanent magnet motor and storage medium
  • Method and device for monitoring turn-to-turn residual insulation of a permanent magnet motor and storage medium

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Embodiment Construction

[0053] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0054] Such as figure 1 as shown, figure 1 It is a schematic diagram of the system structure of the hardware operating environment involved in the solution of the embodiment of the present invention.

[0055] The inter-turn short circuit residual insulation monitoring program of the permanent magnet motor in the embodiment of the present invention can be applied to terminals with data processing functions such as smart TVs, smart phones, tablet computers, and computers.

[0056] Such as figure 1 As shown, the terminal may include: a processor 1001 , such as a CPU, a memory 1005 , and a communication bus 1002 . Wherein, the communication bus 1002 is used to realize connection and communication between these components. The memory 1005 can be a high-speed RAM memory, or a stable memory (non-volatile memory), such as a...

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Abstract

The invention discloses a method for monitoring turn-to-turn residual insulation of a permanent magnet motor. The method comprises the following steps: acquiring a d-axis current signal when the permanent magnet motor works; extracting a target harmonic wave in the current signal based on a short-time adaptive linear neural network algorithm; calculating the harmonic amplitude of the order corresponding to the target harmonic; and monitoring the turn-to-turn residual insulation of the permanent magnet motor according to the difference between the amplitude of the second-order harmonic in the harmonic amplitude and the amplitude of the second-order harmonic under the normal condition. The invention further discloses a permanent magnet motor turn-to-turn residual insulation monitoring device and a computer readable storage medium. The method can improve the fault detection precision of the permanent magnet motor.

Description

technical field [0001] The invention relates to the technical field of electrical digital data processing, and in particular to a method, device and storage medium for monitoring residual insulation of inter-turn short circuit of a permanent magnet motor. Background technique [0002] Permanent magnet synchronous motors are widely used due to their high efficiency, high power and high torque density. When the motor frequently works in overheating, overvoltage, and impact environments, it may cause various electrical faults such as short circuit between turns of stator winding, permanent demagnetization of permanent magnet, open circuit of winding, and ground short circuit. Among the various types of electrical faults mentioned above, inter-turn short circuit faults account for the highest proportion and are often the cause of other types of electrical faults. [0003] The initial form of the permanent magnet synchronous machine (PMSM) turn-to-turn short-circuit fault is the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/52G01R31/34
CPCG01R31/1227G01R31/52G01R31/346
Inventor 刘侃魏东丁荣军梅文庆文宇良张定华王建波黄庆陈泳丹
Owner HUNAN UNIV
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