Performance Analysis of Novel Single-Phase Parallel Hybrid-Excited Flux-Switching Machine

To obtain magnetic field regulation capacity and reduce copper loss in the field winding, a single-phase parallel hybrid-excited flux-switching machine (PHEFSM) is investigated in this paper. Because the permanent magnet with tangential magnetization is fixed at the slot opening of the field winding slot, the yoke width of the field winding slot determines the magnetic field regulation capacity, and the saturation condition varies significantly with the field current. To accurately calculate the performance of PHEFSM, a nonlinear magnetic equivalent circuit model that considers the iron saturation is derived, and it is verified by the finite-element method. A composite rotor with two kinds of rotor core laminations is adopted to obtain self-starting capability. Two prototype machines with a classical rotor and a composite rotor are produced and tested to verify the conclusions.