Consequent-pole Hybrid Excitation Brushless DC Generator Based on Integrated Induction

In order to achieve flexible regulation of output voltage and brushless excitation for the rotor-PM DC generator, a novel hybrid excitation brushless DC generator was proposed. The generator adopts the consequent-pole rotor featuring N-I-I-I pole sequence, in which the iron poles provide low reluctance paths for the flux produced by excitation winding, and then the flexible regulation of flux can be achieved. Meanwhile, the method of integrated DC induction was adopted to achieve the brushless excitation of the generator, in which the induction excitation part and the main machine part share one set of the stator/rotor core laminated by silicon steel sheet, and then the simple structure and high space utilization were achieved. This paper introduced the structure and operation principle of the proposed generator. Finite element simulation was employed to analyze the electromagnetic performance of the generator under both no load and load conditions. The results show that the proposed generator has good induction excitation and voltage regulation characteristics. Finally, a prototype was manufactured, and the experimental results can verify the correctness of the theory and simulation analysis. © 2022 Chin. Soc. for Elec. Eng.