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High strength nonmagnetic metallic retaining sleeve is widely used in surface permanent magnet (SPM) machines for mechanical reliability, especially to high speed machines. Rotor eddy-current losses would be significantly increased in fractional slot concentrated winding (FSCW) SPM machines using sleeve. In this paper, the novel structure with copper damping rings inserted in rotor lamination is proposed...
In this paper, a method of modeling synchronous machines with damper windings based on the winding function approach (WFA) has been proposed. This method of machine analysis with the actual winding distribution does not require neglecting the harmonics of the winding distributions. The proposed model can be used to simulate the machine under faulty conditions such as broken damper bars and end ring,...
In this paper there are presented the experimental results for the average power three-phase synchronous generator, connected successively on a controlled bridge rectifier, also on a half-controlled one. There are taken into account the electrical quantities to the generator windings terminals, the damping winding bars currents and the field in different portions of the magnetic circuit. The results...
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