Design, Prototyping, and Analysis of a Novel Permanent-Magnet Doubly Salient Generator

This paper presents the design, prototyping, and analysis of a novel permanent-magnet doubly salient generator. The excitation of the machine is carried out by neodymium-iron-boron magnets. This generator has two stators and two rotors, each of them also have four poles and two poles respectively. The rotors are shifted forty-five degrees in space with respect to each other to prepare full energy in each cycle. This leads to a lower voltage ripple after rectification. Moreover, by using the two-pole rotor, which leads to lower core losses, this generator can be used for high-speed applications. Finite element analysis of this generator is carried out to investigate the magnetic field distribution at different rotor positions and load currents. To verify the theoretical results, a prototype has been constructed and tested. The experimental results are in good agreement with the theoretical results. Copyright (C) 2012 Praise Worthy Prize S.r.l. - All rights reserved.