An interior permanent magnet synchronous motor with a skew-slot and improved rotor structure is proposed in the paper. The source and main order of the noise of the motor are analyzed. The electromagnetic characteristics of the motor before and after utilizing the new structure are analyzed and compared. In addition, the vibration and noise tests of the prototype are done. The results show that the main source of noise of the 8-pole 48-slot motor is the 0-order electromagnetic force, and the motor with low vibration noise can be achieved with the proposed structure in this paper.

为研究永磁力矩电机的温度场,考虑电机各部件比热容、导热系数、动力黏度、流体边界条件、对流换热系数的影响,建立永磁力矩电机的热阻网络模型和流固耦合模型,对永磁力矩电机进行瞬态温度场仿真分析.将基于两种模型所得的热计算结果进行对比,并建立样机温升试验平台开展温度试验.试验结果表明,两种模型的温度变化趋势与试验结果接近,偏差在5％以内,由此验证两种模型的精确度与正确性,为永磁力矩电机的温度场研究提供了方法.

提出采用玻璃纤维取代碳纤维用于小型表贴式永磁电机护套的方案,为此对一款实际生产中额定功率为11 kW、额定转速为6000 r·min-1的小型表贴式永磁电机转子的保护工艺进行了研究.基于有限元法,采用Ansys软件分别对玻璃纤维无纬带和碳纤维2种护套材料进行转子结构强度和温度场仿真.结果表明,碳纤维护套的保护效果优于玻璃纤维护套,但玻璃纤维护套的散热性好于碳纤维护套,2种护套均能保证测试电机的结构安全.基于以上结果并考虑材料成本和工艺难易程度,认为采用玻璃纤维护套性价比更高.