Electrical Fault Diagnosis Method of Induction Motor Based on Magnetic Flux Leakage Signal

Abstract

The invention discloses an induction motor electrical fault diagnosis method based on a magnetic leakage signal. A magnetic leakage sensor is adopted to collect the three-axis magnetic leakage signalof an induction motor; a vibration sensor is adopted to collect a motor shell vibration signal of the motor; then the collected signals are analyzed to judge whether the motor breaks down or not; thefault type of the motor is judged; the magnetic leakage signal indirectly reflects the change condition of an air gap magnetic field and is sensitive to an electrical fault; compared with current monitoring, the magnetic leakage monitoring method also has the advantages of convenience in signal acquisition, low acquisition cost and the like; under the condition that normal operation of the motor is not affected, the magnetic leakage signal outside the motor shell is collected to identify the electrical fault of the motor; and therefore, the method has the advantages of convenience in signal acquisition, low signal acquisition cost and the like.

Description

technical field [0001] The invention belongs to the technical field of motor fault diagnosis, and in particular relates to a method for diagnosing electrical faults of induction motors based on magnetic flux leakage signals. Background technique [0002] Induction motors are widely used in industry and are the main energy-consuming equipment, and motor failure will lead to high maintenance costs, huge production stop loss, and even endanger personal safety. Mastering the health status of the motor is of great significance to timely troubleshooting and reducing economic losses. [0003] There are two types of industrial motor faults: electrical faults and mechanical faults. Current monitoring methods are commonly used to diagnose electrical faults such as broken rotor bars, air gap eccentricity, and inter-turn short circuits. Vibration detection methods are used to diagnose mechanical faults such as bearing faults and loose casings. The monitoring systems commonly used in Ch...

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Problems solved by technology

[0005] In order to solve the above problems, the present invention provides an induction motor electrical fault diagnosis method based on magnetic flux leakage signals, which solves the problems of high cost and difficult deployment in the existing monitoring technology, and provides a suitable condition monitoring program

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