【摘要】 提出一种磁热耦合方法并对高速爪极电机进行热分析。对高速电机而言铁耗在所有损耗中所占比例较大,准确计算铁耗至关重要。由于爪极电机的磁路是三维结构的,本文通过三维有限元分析,按照旋转磁化条件下的铁耗计算模型得到每个单元的磁滞、涡流和异常损耗。通过保持磁场分析和热场分析时具有相同的剖分单元结构和数目,将每个单元在磁场分析中得到的铁耗耦合到热场分析中,其他损耗如风摩耗、转子损耗等也包含在模型中。将这种方法应用在一台2kW采用软磁复合材料的爪极电机上,通过试验分析,计算结果与测量结果相吻合。更多还原

【Abstract】 This paper presents a magneto-thermal model of a high-speed claw pole motor.Core loss is much greater than other losses and is the main source of heat due to the high operating frequency.Therefore it is of crucial importance to be able to calculate the core loss accurately.Three-dimensional finite element analysis is used for core loss calculation and temperature distribution because flux path in claw pole motor is pure three-dimension.The total core loss is computed by separating the alternating and rotational hysteresis,eddy current and anomalous losses in each element.The element’s core loss is coupled into elements in thermal analysis by keeping the same mesh structure between magnetic and thermal analysis.Other losses such as air friction loss,rotor loss are included in the model due to high speed.This model is applied to a 2kW,20kr/min three stack claw pole motor with soft magnetic composite core,and the results are compared and discussed finally.更多还原