Design and optimization of a permanent magnet claw pole machine with concentrated winding and hybrid cores

With the performance of soft magnetic composite (SMC) improves, there is a trend to develop permanent magnet claw pole machine (PMCPM) by using SMC cores in the past decades, as it is with complex 3D magnetic flux path. The traditional PMCPM (TPMCPM) needs to form the three phase operation by stacking three single phase modules in the axial direction, and each of them needs to be shifted with 120 degrees electrically to each other. In this paper, a PMCPM with concentrated winding (CWCPM) is proposed to overcome above constraints of the TPMCPM. Furthermore, the shielding layer is employed for reducing the flux leakage of CWCPM, and thus the performance of SL-CWCPM is improved. Considering these machines are with many design parameters, the multilevel sequential Taguchi method is employed and the sensitivity method with correction coefficient is employed for divide these design parameters into three groups. Lastly, the hybrid silicon sheet and SMC cores are employed to increase the performance of CWCPM, and the concept of the hybrid material magnetic core for the PMCPM is verified by the experiment.