Fault detection device and method for stator winding of miniature electromagnetic generator

Abstract

The invention provides a fault detecting device and method of a stator winding of a micro electromagnetic generator. The fault detecting device consists of a vibration source, a micro generator, switching circuits, a main control panel and a controller. The vibration source provides a vibration with predetermined duration for the micro generator, so that magnetic induction lines produced by a rotor of the micro generator are cut by a stator armature structure of the micro generator, and electrical signals generated by a secondary winding are detected by signal detecting units arranged on the secondary winding of the micro generator. The switching circuits are used for amplification and filtering processing of the detected electrical signals generated by the secondary winding. The main control panel is used for calculating a stator instantaneous power of the micro generator according to the electrical signals processed by the switching circuits and determining the fault characteristic frequency band and the fault characteristic quantity by wavelet decomposition of the stator instantaneous power of the micro generator. And the controller is used for adjusting and controlling the vibration source. The fault detecting device and method are capable of detecting faults without interference with working of the generator, and has the advantage of strong capacity of interference resistance.

Description

technical field [0001] The invention relates to motor detection technology, in particular to a fault detection device and method for a stator winding of a miniature electromagnetic generator. Background technique [0002] In the prior art, for small generators (such as those used for robots), due to the complex structure inside the micro-motor and the interference of internal harmonics and redundant signals, it is very important to obtain accurate signals and rationally process and analyze parameters. [0003] Traditional micro-motor fault diagnosis methods basically rely on the experience of quality inspectors, mainly including dialectical method and comparative method. Although micro-motor faults can be diagnosed to a certain extent, this diagnostic method not only requires experienced inspectors, but also has low detection efficiency. With the increasingly high requirements for indicators such as the reliability of micro-motors and the degree of industrial automation, tr...

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Problems solved by technology

[0006] At present, when the existing detection technology is used for the short-circuit fault detection of the motor stator winding, there is a problem of inaccurate detection

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