Turn to Turn fault Analysis and Comparison of Single Phase PMSG for two different poles

Abstract

This paper is a study and comparison of the turn to turn fault in Single phase Permanent magnet synchronous generator for lower as well as higher number of poles. Single phase PMSG have a lot of application in generation of the power for fractional kilowatt systems and household purpose. Fault analysis is one of the most important factor for designing of the PMSG for these application. With advancement in the technology of higher poles machine construction, it has become necessary to study the effect of turn to turn fault on the Single phase PMSG with large number of poles for their proper design. Fault often goes unnoticed at its inception in the single phase PMSG due to their low power and current rating, which leads to the necessity to analyze the effect of fault for long running operations. For this purpose, we propose a generalized mathematical model for an unhealthy generator using the Winding Function Theory. The effect of fault severity on terminal voltage, fault current in shorted windings and counter-torque has been analyzed and compared for 4 pole and 24 pole PMSG in order to clarify the effect of higher number of poles on the fault. The prototype of PMSG has been procured and run for both 4 poles and 24 poles in faulted conditions for obtaining the experimental results. Theoretical modelling has been analyzed and validated by simulation as well as experimental results. Appropriate explanations have been provided for the obtained results.