Parameter sensitivity study for optimization of single phase E-Core hybrid excitation flux switching machine

Abstract

Research and development on hybrid excitation flux switching machines (HE-FSM) for various applications have been carried out in the last years. The designed HE-FSM consist of permanent magnet (PM) and DC field excitation coil (DC-FEC) as their main flux sources located on the stator, while a single piece rotor gives the advantages of robust rotor structure. Since most of the designed HE-FSMs utilize three-phase windings, more complicated design and control system are required to run the motor. Thus, a new design of single-phase ECore HE-FSM with several advantages of much simpler converter size and smaller battery package due to small voltage capacity when compared with conventional three-phase system is proposed. Consequently, the size of overall configuration systems will also be reduced resulting in reducing total weight and cost. In this paper, initial performances of 4S-4P, 4S-6P, 4S-8P and 4S-10P E-Core HE-FSM topologies are analyzed. Since 4S-10P design gives highest torque and power performances, deterministic design optimization approach is conducted to enhance much higher and optimum performances. As conclusion, the optimized E-core HE-FSM with 4S-10P topology has low back-emf, acceptable cogging torque with maximum torque and power of 208.857Nm and 47.31 kW, respectively.