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The optimization of the motor cores, coupled with new core shapes as well as powering the motor at high frequency are the primary reasons  for the use of new materials. The utilization of new materials, like SMC (soft  magnetic composite), reduce the core loss and/or provide quasi-isotropic core’s properties in any magnetization direction. Moreover, the use of SMC materials  allows for avoiding degradation of the material portions, resulting from punching  process, thereby preventing the deterioration of operating parameters of the motor. The authors examine the impact of technological parameters on the  properties of a new type of SMC material and analyze the possibility of its use  as the core of the fractional power motor. The result of the work is an indication of the shape of the rotor core made of a new SMC material to achieve operational parameters similar to those that have a motor with a core made of laminations.

Comparison of the fractional power motor with cores made of various magnetic materials