摘要
针对温升计算过程中材料的温度特性对损耗产生影响的问题,利用电磁场与温度场双向耦合的分析方法,并在求解过程中计及损耗的空间分布,从而实现高速永磁电机温升的准确计算。以一台15kW表贴式高速永磁体同步电机为例,考虑电机各部件装配间隙,运用磁热耦合方法计算了电机在额定转速时的温升情况,与传统温度场加载热密度法计算结果对比,并通过温升实验验证了双向耦合计算方法的准确性。以磁热耦合研究方法为基础,对高速电机护套的选材问题进行探讨,提出在护套上加装适当厚度的铜屏蔽层来降低损耗与温升,同时分析表贴式与内置式转子结构对对电机损耗与温升的影响,为高速永磁电机转子结构设计提供可靠有效的参考依据。
Aiming at the influence of material temperature characteristics on loss in the process of temperature rise calculation,the method of bidirectional coupling between electromagnetic field and temperature field is used,and the spatial distribution of loss is taken into account in the process of solution,so that the temperature rise calculation of high speed permanent magnet motor can be realized.Taking a 15kW meter-mounted high-speed permanent magnet synchronous motor as an example,considering the assembly clearance of each part of the motor,the temperature rise of the motor at rated speed was calculated by magneto-thermal coupling method.The results were compared with those calculated by traditional temperature field loading thermal density method.The accuracy of the bidirectional coupling calculation method was verified by temperature rise experiment.Based on the research method of magneto-thermal coupling,the material selection of high-speed motor sheath was discussed.The copper shield layer with appropriate thickness was added to the sheath to reduce the loss and temperature rise.At the same time,the influence of surface-mounted and built-in rotor structure on motor loss and temperature rise was analyzed,which provided a reliable and effective reference for the rotor structure design of high-speed permanent magnet motor.
作者
韩雪岩
李春雷
宋聪
王世伟
祝天利
HAN Xueyan;LI Chunlei;SONG Cong;WANG Shiwei;ZHU Tianli(National Engineering Research Center for REPM Electrical Machine,Shenyang University of Technology,Shenyang 110870,China)
出处
《微电机》
北大核心
2020年第1期13-19,共7页
Micromotors
基金
国家重点研发计划(2016YFB0300503)
江西省重大研发专项项目(20173ABC28007)
沈阳市科技计划项目(18013021)
关键词
温度特性
高速永磁同步电动机
耦合
铜屏蔽层
转子结构
temperature characteristics
high speed permanent magnet synchronous motor
coupling
copper shielding
rotor structure
