2022 年 30 巻 3 号 p. 335-341
In order to maintain the motor's body size and increase its power, Interior Winding Synchronous Motor is being considered. A magnetic composite material is applied to the yoke of Interior Winding Synchronous Motor. Until now, magnetic composite materials have been applied to transformers of DC-DC converters driven in the MHz band. However, magnetic composite materials in the kHz band and high flux density range used in Interior Winding Synchronous Motor have not been examined. Therefore, magnetic composite materials suitable for IWSM was examined by changing materials of magnetic powder. As a result, the relative magnetic permeability improved up to twice at maximum. Furthermore, iron loss was reduced by 94.4% as compared with the conventional magnetic composite material. When applied to Interior Winding Synchronous Motor, the efficiency was improved by 0.3% and the loss was reduced by 18.7%. Magnetic composite materials for IWSM should be selected from magnetic powders with large particle size, low coercive force, and high saturation flux density.
