Motor and generator fault diagnosis system based on harmonic method

Abstract

The invention relates to the technical field of motors and generators, and further discloses a motor and generator fault diagnosis system based on a harmonic method. The motor and generator fault diagnosis system comprises a current detection part, wherein the output end of the current detection part is electrically connected with the input end of a switcher, the input end of the switcher is electrically connected with the output end of a magnetic field detection part, the input end of a selective amplification circuit is electrically connected with the output end of the switcher, and the output end of the selective amplification circuit is electrically connected with the input end of an A / D converter. By adopting the motor and generator fault diagnosis system based on the harmonic method,real-time data of a motor and a generator in an operating state are acquired by using non-contact current harmonic waves, the harmonic waves refer to integral multiples of basic frequency and have regularity, the frequency and noise are often mixed together under general conditions, but the harmonic waves generally comprise fractional harmonic waves of fundamental waves and take about 3-3.6 KHz as an object, and the frequency is alternating current of a frequency band of a KHz level from 10 KHz.

Description

technical field [0001] The invention relates to the technical field of motors and generators, in particular to a fault diagnosis system for motors and generators based on the harmonic method. Background technique [0002] In recent years, various industries have gradually introduced a large variety of high-performance and high-efficiency motors and generators, combined with high-performance automation systems, to achieve large-scale power transmission and production. Such large-scale power transmission and production Continuous operation is usually required. If the motor and generator equipment fail to stop running, it may lead to the paralysis of the entire transmission line and the shutdown of the production line. The production order will be disrupted, causing immeasurable losses, and may even cause other fatal problems. On the other hand, in order to ensure the stable operation of the equipment, measures to increase equipment investment and strengthen equipment maintenan...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a motor and generator fault diagnosis system based on the harmonic method, which has the advantages of long-term tracking and maintenance, and solves the problem that the existing electrical detection system cannot perform long-term tracking of equipment and maintenance, reducing the safety guarantees for the operation of engine and generator equipment

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