Brushless alternating current (AC) generator failure diagnosis instrument

Abstract

The invention discloses a brushless alternating current (AC) generator failure diagnosis instrument, belongs to generator state monitoring and fault diagnosis equipment, and solves the problem that the conventional generator failure diagnosis device cannot perform unified monitoring and concentrated diagnosis on early electrical failures of the generator. The failure diagnosis instrument comprises a sensor group, a signal conditioning circuit, a sampling circuit, a data processor and a man-machine interaction unit, wherein the sensor group consists of three voltage sensors and four current sensors; the data processor loads a stator winding interturn short-circuit module, a rotor winding interturn short-circuit module, an exciter failure diagnosis module and a rotating rectifier failure diagnosis module for performing failure detection and recognition processing; and the man-machine interaction unit outputs a result. The failure diagnosis instrument is suitable for a marine generator in a narrow space, and various invasive sensors are not required to be arranged in the generator; and various corresponding electrical failures can be automatically calculated and judged, and the failure diagnosis instrument has high real-time property, has universality on generators with different model numbers and can meet an online detection requirement.

Description

technical field [0001] The invention belongs to generator state monitoring and fault diagnosis equipment, in particular to a fault diagnosis instrument for AC brushless generators. Background technique [0002] Existing generator monitoring and diagnosis systems mainly carry out condition monitoring and fault diagnosis on winding insulation, bearings and cooling systems, and rarely involve monitoring and diagnosis on electrical faults of generator sets. This is because there are many types of generator electrical faults and the fault locations are scattered. Early electrical faults mainly include inter-turn short-circuits in generator stator windings, inter-turn short-circuits in generator rotor windings, and generator excitation system faults. At present, for each type of electrical fault, different detection methods are required, different sensors are installed, and different diagnostic algorithms are applied. Therefore, it is difficult to perform unified monitoring and c...

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Problems solved by technology

[0006] The invention provides a fault diagnosis instrument for AC brushless generators, which solves the problem that existing generator fault diagnosis devices cannot conduct unified monitoring and centralized diagnosis of early electrical faults of generators

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