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Method and system for simulating stator inter-turn short circuit fault degradation process of permanent magnet synchronous motor

An inter-turn short-circuit fault, permanent magnet synchronous motor technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problem of not being able to simulate the degradation process of stator inter-turn short-circuit faults

Active Publication Date: 2019-09-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method and system for simulating the degeneration process of a stator inter-turn short circuit fault of a permanent magnet synchronous motor, which solves the technical problem that the prior art cannot simulate the degeneration process of a stator inter-turn short circuit fault

Method used

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  • Method and system for simulating stator inter-turn short circuit fault degradation process of permanent magnet synchronous motor
  • Method and system for simulating stator inter-turn short circuit fault degradation process of permanent magnet synchronous motor

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Embodiment 1

[0075] refer to figure 1 The method for simulating the degradation process of a permanent magnet synchronous motor stator turn-to-turn short-circuit fault provided in Embodiment 1 of the present invention includes:

[0076] Step S101, establishing a discrete model of the stator turn-to-turn short-circuit fault state of the permanent magnet synchronous motor. The stator-turn-to-turn short-circuit fault state discrete model includes the stator voltage equation and the stator flux linkage in the natural coordinate system when the permanent magnet synchronous motor has a stator turn-to-turn short-circuit fault. Equations, and the electromagnetic torque and motor motion balance equations in the rotating orthogonal coordinate system;

[0077] Step S102, establishing a time-varying model of the stator resistance when the permanent magnet synchronous motor is in the degraded state of the stator inter-turn short circuit fault, and an interaction model between the stator temperature and...

Embodiment 2

[0083] This embodiment is carried out based on the virtual simulation platform Simulink environment, and the simulation platform is composed of a voltage signal generation module, a degradation simulator, an oscilloscope and the like. The simulation platform is a commonly used prior art in this field, and will not be described in detail here. Among them, the parameters used in the simulation experiment are shown in Table 1;

[0084] Table 1. Simulation experiment parameters

[0085] parameter item parameter parameter item parameter power amplitude 311V power frequency 50Hz Stator resistance 2.875Ω Number of pole pairs 2 Direct axis inductance 8.5mH Quadrature axis inductance 8.5mH permanent magnet flux linkage 0.175Wb Moment of inertia 0.001kg.m^2

[0086] refer to figure 2 , the method for simulating the degradation process of a permanent magnet synchronous motor stator turn-to-turn short-circuit fault provided ...

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Abstract

The present invention discloses a method and system for simulating stator inter-turn short circuit fault degradation process of a permanent magnet synchronous motor. The method has the advantages that: by establishing a discrete model and a stator resistance time-varying model of the stator inter-turn short circuit fault state of the permanent magnet synchronous motor, and an interaction model between the stator temperature and the stator winding degradation, according to the interaction model, a stator temperature value at next moment is obtained, according to the stator temperature value atthe next moment and the stator resistance time-varying model, the state update value is obtained, and according to the state update value, the simulation process of the stator inter-turn short circuitfault degradation process of the permanent magnet synchronous motor is realized through iterative. The method and system solves the technical problem that the prior art cannot simulate the stator inter-turn short circuit fault degenerating process, can analyze the change law of operating state of the permanent magnet synchronous motor under the state of the stator inter-turn short circuit fault degradation, and provides safe, reliable and near real fault emulation and simulation for technical research on detection and diagnose of the stator inter-turn short circuit fault of the permanent magnet synchronous motor

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a method and system for simulating the degeneration process of a short-circuit fault between turns of a stator of a permanent magnet synchronous motor. Background technique [0002] The permanent magnet synchronous motor is a kind of synchronous motor that uses permanent magnets instead of excitation windings for excitation, without commutators and brushes. It has the characteristics of simple structure, high efficiency, low moment of inertia, and good reliability. It is widely used in numerical control equipment. , electric vehicles and other products. In actual operation, due to electrical, thermal, mechanical and other stresses, many key components in the motor are at risk of degradation and failure. Among them, the inter-turn short circuit fault of the stator is one of the common faults of permanent magnet synchronous motors. Changes in supply voltage, frequency, and stator t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/06
CPCG01R31/72
Inventor 陈志文梁可天彭涛阳春华陶宏伟杨超桂卫华
Owner CENT SOUTH UNIV
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