摘要
自起动永磁同步电动机,由于其运行条件经常发生变化,致使电机内部的损耗随之改变,为了研究影响其损耗的主要因素及其在不同运行条件的变化规律,在充分考虑谐波磁场与电流的情况下,利用时步有限元方法对电机各部分损耗密度进行了准确计算,从而得到不同电压及负载条件下的定、转子铜耗与铁耗。通过对定子电流、导条电流密度以及铁心磁密的谐波分析,研究了损耗的谐波含量,进而得出了影响永磁电机损耗的主要因素及其在不同运行条件的变化规律,揭示了空间齿谐波磁场对转子损耗的重要影响。通过仿真结果与实测数据进行对比,验证了损耗计算的合理性。
The operation condition of line-start permanent magnet synchronous motor （PMSM） varies frequently, and its losses change correspondingly. In order to investigate the main factor which affects losses and its variation, Time-Stepping Finite Element Method （T-S FEM） was employed to calculate the loss density in different part of PMSM considering the harmonic magnetic field and current, then the copper and iron losses under different voltage and load conditions were obtained, and it＇ s harmonic component was analyzed based on Fourier analysis of stator current, current density in rotor bar and magnetic density in the core, furthermore the main factor which affects the losses of PMSM and its variation was obtained. The results indicate that there is a significant influence of slot harmonic field to the rotor losses. The rationality of calculation is validated by comparing with the experiment result.
出处
《电机与控制学报》
EI
CSCD
北大核心
2009年第1期11-16,共6页
Electric Machines and Control
基金
国家自然科学基金(50777018)
关键词
永磁同步电机
有限元
铜耗
铁耗
谐波
permanent magnet synchronous motors
finite element
copper loss
iron loss
harmonic
