Permanent magnet synchronous motor turn-to-turn short circuit fault diagnosis method based on magnetic field distribution monitoring

A technology for permanent magnet synchronous motors and inter-turn short-circuit faults, which is applied in the direction of measuring electricity, measuring electrical variables, and measuring devices, and can solve the problems of high misjudgment rate and low accuracy

Active Publication Date: 2017-09-15
CHONGQING UNIV
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Although significant progress has been made in this area, the

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  • Permanent magnet synchronous motor turn-to-turn short circuit fault diagnosis method based on magnetic field distribution monitoring
  • Permanent magnet synchronous motor turn-to-turn short circuit fault diagnosis method based on magnetic field distribution monitoring
  • Permanent magnet synchronous motor turn-to-turn short circuit fault diagnosis method based on magnetic field distribution monitoring

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Embodiment Construction

[0073] The present invention will be further described below in conjunction with the examples, but it should not be understood that the scope of the subject of the present invention is limited to the following examples. Without departing from the above-mentioned technical ideas of the present invention, various replacements and changes made according to common technical knowledge and conventional means in this field shall be included in the protection scope of the present invention.

[0074] Using the finite element simulation software, the simulation calculation of the turn-to-turn short circuit fault under normal working conditions and different conditions is carried out. The working conditions of the simulation are shown in Table 1.

[0075] Table 1 Simulation calculation working conditions

[0076] serial number

Load torque / Nm

Speed / rpm

Fault

Condition 1

50

3000

none

Condition 2

50

3000

2 turns 0.1Ω turn-to-turn short...

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Abstract

The invention discloses a permanent magnet synchronous motor turn-to-turn short circuit fault diagnosis method based on magnetic field distribution monitoring. The method is characterized by, to begin with, in the steady state, carrying out analysis on an equivalent circuit obtained when the permanent magnet synchronous motor has turn-to-turn short circuit fault, and obtaining a series of diagnosis steps; and through the diagnosis steps, judging whether the motor has the turn-to-turn short circuit fault by utilizing a high-frequency component of stator tooth magnetic flux.

Description

technical field [0001] The invention relates to motor fault diagnosis technology. Background technique [0002] Permanent magnet synchronous motors have many significant advantages such as simple structure, no brushes and slip rings, no electric excitation system, high operational reliability, high power density, and flexible shapes and sizes of motors. In line with the economic development needs of energy saving and emission reduction, it can not only partially replace the traditional electric excitation motor, but also achieve high efficiency that is difficult for electric excitation motors to achieve. Therefore, permanent magnet synchronous motors have been widely used in aerospace, numerical control machine tools, electric vehicles, robots and other fields. [0003] Due to the wide range of applications of permanent magnet synchronous motors and the harsh working environment, various failures of permanent magnet motors are inevitable. Common faults of permanent magnet ...

Claims

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Application Information

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IPC IPC(8): G01R31/02G01R31/06
CPCG01R31/50G01R31/72
Inventor 黄嵩曾冲杨永明武盾陈晨
Owner CHONGQING UNIV
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