高过载永磁同步电机的电磁特性

发布时间：2018-05-03 16:31

本文选题：永磁同步电机 + 高过载　；参考：《电工技术学报》2017年02期

【摘要】：定子铁心饱和、电枢反应限制了永磁同步电机(PMSM)输出转矩的进一步提高,在一些应用场合电机的转矩密度无法满足需求。研究了永磁同步电机的转矩特性,提高了恒转速下的转矩过载能力。首先从PMSM的输出功率入手,分析PMSM的极限输出功率与输入电流、直交轴电抗和空载反电动势的关系。接着通过改变PMSM定子和转子结构参数,分析了不同槽、极比对电机转矩过载的影响;磁钢厚度对气隙磁密以及直交轴电感的影响;定子裂比对电机电磁转矩的影响;不同齿宽对电机输出转矩的影响。由此得到高过载永磁电机的设计方法。最后进行有限元分析和电磁设计,并研制了一台10倍转矩过载的PMSM。搭建了测功机实验平台,对比测试了高过载电机以及常规设计PMSM的电阻、电感与转矩-电流特性曲线。实验分析结果与有限元计算结果基本一致,验证了理论分析的正确性。
[Abstract]:The saturation of stator core and armature reaction limit the further improvement of the output torque of PMSM. The torque density of PMSM can not meet the requirement in some applications. The torque characteristics of permanent magnet synchronous motor (PMSM) are studied, and the torque overload capacity at constant speed is improved. The relationship between the limit output power of PMSM and the input current, direct-axis reactance and no-load backEMF is analyzed from the point of view of the output power of PMSM. Then, by changing the structure parameters of PMSM stator and rotor, the influence of different slot and pole ratio on the torque overload of motor, the effect of magnetic steel thickness on air-gap magnetic density and direct-axis inductance, the influence of stator crack ratio on motor electromagnetic torque are analyzed. The effect of different tooth width on motor output torque. The design method of high overload permanent magnet motor is obtained. Finally, finite element analysis and electromagnetic design are carried out, and a 10 times torque overload PMSM is developed. The experimental platform of dynamometer is built, and the resistance, inductance and torque-current characteristic curves of high overload motor and conventional design PMSM are compared and tested. The experimental results are in good agreement with the results of finite element analysis, which verifies the correctness of the theoretical analysis.
【作者单位】：哈尔滨工业大学电气工程及自动化学院;中国运载火箭技术研究院;
【基金】：国家杰出青年科学基金资助项目(51225702)
【分类号】：TM341

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