Simulation of large power brushless synchronous generator (BLSG) with rotating rectifier by reluctance network for fault analysis and diagnosis

The aim of this paper is to simulate, with saturation and faults of rotating diodes rectifier, a large power brushless synchronous generator (BLSG) which is used for large turbo-generator brushless excitation systems. Reluctance network coupled with electric circuits and power electronic part integrating movement and nonlinearities of material has been developed. The approach realizes a good compromise between accuracy and computing time in order to completely analyze a 39 phases machine with 117 teeth and 22 poles and 78 diodes of the associated rectifier bridge. Experimental measurements validate our model and numerical simulations with finite element package.