Loss Analysis of IPM Motors Considering Carrier Harmonics
Loss Analysis of IPM Motors Considering Carrier Harmonics
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DOI：
10.1541/ieejias.127.87
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发表时间：
2007
影响因子：
--
通讯作者：
K. Yamazaki;A. Abe
中科院分区：
文献类型：
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作者：
K. Yamazaki;A. Abe
由PWM逆变器驱动的内置式永磁电机在工业上得到了广泛的应用。马达有很多优点。采用弱磁控制可以扩大电机的转速范围。既可以利用磁阻转矩，也可以利用磁矩。另一方面，电机内部的电磁场中含有大量的谐波。它们会在定子和转子上造成相当大的谐波损耗。特别是在稀土磁体的情况下，由于磁体的电导率较大，且载频在1 kHz以上，因此由PWM逆变器产生的载波谐波可能会造成较大的谐波涡流损耗。本文采用三维有限元分析方法研究了由PWM逆变器驱动的内置式永磁电机的损耗，可以准确地估算出永磁体内的涡流损耗。将计算出的损失与
Interior permanent magnet motors driven by PWM inverters are widely applied to the industry. The motors have many advantages. The speed range can be extended using the flux weakening control. The reluctance torque can be utilized as well as the magnet torque. On the other hand, the electromagnetic field in the motor includes many harmonics. They cause considerable harmonic losses at the stator and the rotor. Especially, in the case of the rare earth magnets, the carrier harmonics produced by the PWM inverter may cause relatively large harmonic eddy current losses because the conductivity of the magnet is large and the carrier frequency is over 1 kHz. In this paper, we investigate losses of the interior permanent magnet motors driven by PWM inverters using 3-D finite element analysis, which can estimate the eddy current loss in the permanent magnet accurately. The calculated losses are compared with the