Brushless Wound Rotor Synchronous Generator Using Third Harmonic Field Excitation

Abstract

This paper describes the topology of brushless wound rotor synchronous machine for generator operation. A brushless wound rotor synchronous machine (WRSM) is designed to remove the need of slip rings and brushes which is a problem in wound rotor synchronous machines. It’s alternative machine a permanent magnet synchronous machine (PMSM) suitable for many applications, however, the cost of permanent magnet (PM) tends to increase the overall price of such machines for commercial use. Therefore, research is taking place in the area of wound rotor synchronous machines. In this paper, a brushless WRSM is investigated to be run as a generator. In this case, the machine’s field is excited through third harmonic magnetomotive force (MMF). The new topology described in this research is investigated through simulation results. An 8-pole 48-slot machine is used to validate the working of the machine.