摘要
针对分数槽集中绕组永磁同步电机的损耗高、效率低等问题,提出通过对内置式永磁电机转子磁路结构进行优化的方式来提高电机效率,并利用有限元方法进行计算、建模仿真和验证。利用有限元分析方法,分别针对一字型、弓型、阶梯型、线性型等转子磁路结构电机进行空载、负载的电磁计算与分析,计算结果表明,在电机功率、尺寸、转速相同,永磁体用量和位置相同的情况下,磁极优化后电机的反电动势波形更好、损耗更低、效率更高。为了进一步验证电磁场分析结果的正确性,将电磁计算结果以热载荷的形式加载到电机有限元温度场仿真的模型中,通过有限元电磁场与温度场耦合仿真,进一步证明磁极优化后电机的效率显著提高,温升明显下降,电机磁极优化可以大大提高电机的效率。
Aiming at the problem of high motor loss and low efficiency of PMSM with fractional slot concentrated winding,this paper proposed to improve the motor efficiency by optimizing the magnetic pole structure of the rotor,and used the finite element method for calculation,simulation and verification.By using the finite element analysis method,the electromagnetic calculation and analysis of no-load and load were carried out for the rotor pole structures such as the first shape,arch shape,step form and triangle trapezoid,etc.The calculation results show that,under the condition that the motor power,size and speed are the same,and the permanent magnet consumption and position are the same,the back electromotive force waveform of the motor after the pole optimization is better,the loss is lower and the efficiency is higher.In order to further verify the correctness of the electromagnetic field analysis results,the electromagnetic calculation results are loaded into the finite element temperature field simulation model of the motor in the form of load.Through the coupling simulation of the finite element electromagnetic field and the temperature field,it is further proved that the efficiency of the motor is significantly improved after the magnetic pole optimization,and the temperature rise is significantly decreased.
作者
吴增艳
李世良
刘景林
WU Zengyan;LI Shiliang;LIU Jinglin(Air Force Engineering University,Xi'an 710038,China;Northivest Polytechnical University,Xi'an 710029,China)
出处
《微电机》
北大核心
2020年第11期31-37,共7页
Micromotors
关键词
永磁电机
内置式
有限元
耦合仿真
permanent magnet motor
built-in
finite element
Coupling simulation
