Abstract：Based on electrically excited synchronous machine with brush problem, electrically excited synchronous machine is limitedly applied in inflammable and explosive environment. This paper proposes electrically excited brushless synchronous machine with hybrid rotor which is a new type of AC machine. There are two sets of windings with different pole numbers on the stator. It eliminates the brushes and slip rings which make the structure simpler and stronger. In this paper, the structure characteristic, working principles and power flow relationship of electrically excited brushless synchronous machine are introduced. The air-gap magnetic field of this kind of machine is analyzed, thus it further reveals this kind of machine’s magnetic field modulation principle and mechanism of electromechanical energy conversion. On this basis, the model of electrically excited brushless synchronous machine is established by Ansoft finite element software. The model of motor operation is simulated. And a prototype machine with 8+4 poles was developed. Besides the prototype machine with no-load and load is researched and the experimental results show that the performance of prototype machine is very good and power factor can be adjusted. It lays the theoretical basis for further research of this kind of machine.
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2015, Vol. 30 
