Rotating rectifier and exciter circuit fault dual-function and dual-redundancy monitoring circuit

Abstract

The invention discloses a rotating rectifier and exciter circuit fault dual-function and dual-redundancy monitoring circuit. Signals of the monitoring circuit are sampled from a sampling resistor in an alternating-current exciter excitation circuit, the signals sampled from the sampling resistor are divided into two paths, one path of signals are used for detecting the harmonic content in the signals, and the other path of signals are used for detecting the exciting current. The rotating rectifier and exciter circuit fault dual-function and dual-redundancy monitoring circuit has the advantages that the monitoring circuit can monitor faults of a rotating rectifier in two ways, the online monitoring of the faults of the rotating rectifier is achieved, the reliability of fault detection is improved, and the cost is reduced; the circuit can also monitor the abnormal increase of the exciting current, the monitoring circuit has the advantage of achieving the two-kind fault monitoring function, the generator fault monitoring technology is greatly simplified, and reliability and practicability of fault monitoring are improved.

Description

technical field [0001] The invention relates to the field of brushless alternating current generators, in particular to a dual-function and dual-redundancy monitoring circuit for a rotary rectifier and an excitation circuit fault. Background technique [0002] The brushless alternator adopts a rotating armature synchronous generator, a rectifier installed on the rotor and a rotating magnetic pole synchronous generator to form a brushless generator. The slip ring greatly improves the reliability of the generator. The rotary rectifier is the key component to achieve brushless and the only semiconductor device in the generator. Because the rectifier works at high speed and high temperature, it is affected by centrifugal force, thermal stress, etc., so its failure rate is high. When the rectifier diode is short-circuited or open-circuited, it will directly affect the safe operation of the AC exciter and the main generator. Therefore, how to quickly and accurately determine th...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a rotating rectifier and excitation circuit fault dual function and double redundancy monitoring circuit to solve the current fault diagnosis method of rotating rectifier is too complex and costly

Images