高速永磁电机的损耗计算与温度场分析  

Losses Calculation and Temperature Field Analysis of High Speed Permanent Magnet Machines

作　　者：孔晓光[1] 王凤翔[2] 邢军强[2] 

机构地区：[1]沈阳化工大学信息工程学院,沈阳11014 [2]沈阳工业大学电气工程学院,沈阳110870

出　　处：《电工技术学报》2012年第9期166-173,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(50437010)

摘　　要：高速电机由于转速高和绕组电流频率高,单位体积定子的铁耗和铜耗、转子的高频涡流损耗和表面空气摩擦损耗,与具有常速的普通电机相比皆有较大的增加。同时,由于功率密度的增加和总体散热面积的减小,有效的散热和冷却方式是高速电机设计中的一个重要问题。本文基于磁场有限元和3D流体场分析,对高速永磁电机的基本电气损耗、高频附加损耗和转子空气摩擦损耗进行了分析,并以一台额定转速为60 000r/min的高速永磁电机为例,进行了高速电机损耗的计算及测试方法研究;基于流固耦合分析对高速永磁电机的温升进行了计算,通过对一台高速永磁电机温升计算值与实验结果的比较,验证了高速永磁电机温升计算方法的有效性。Due to the high speed and high frequency of the winding current for the high speed machines, the core and copper losses of stator, eddy current loss and air friction loss of the rotor per unit volume will be much more compared to the normal speed machine. At the same time, because of the power density increasing and the total dissipation area decreasing, the effective dissipation and cooling mode are significant to the high speed machine design. In this paper, the basic electrical loss, the high frequency additional loss and the air friction loss on the rotor surface are analyzed based on the finite element and 3D fluid field analysis. Taking a high speed permanent magnet （PM） machine with rated speed of 60000r/min as an example, the calculation and experimental methods of losses are studied. The temperature field of the high speed PM machine is calculated by using the fluid-solid coupling method. The validity of the temperature field calculation method is confirmed through the comparison of the calculated value with the tested result of the high speed PM machine.

关 键 词：高速永磁电机 损耗计算 流体场 温度场 

分 类 号：TM351[电气工程—电机]