Temperature distribution analysis of permanent magnet in interior permanent magnet synchronous motor considering pwm carrier harmonics
Temperature distribution analysis of permanent magnet in interior permanent magnet synchronous motor considering pwm carrier harmonics
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发表时间：
2007-12
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通讯作者：
M. Kamiya;Y. Kawase;T. Kosaka;N. Matsui
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作者：
M. Kamiya;Y. Kawase;T. Kosaka;N. Matsui
为了应对内置式永磁同步电机(IPMSM)用永磁体的退磁风险，在电机设计阶段对永磁体进行准确的热分析是非常重要的。本文提出了一种用于混合动力汽车牵引传动的IPMSM永磁体温度分布的预测方法。为了实现准确的热分析，首先利用测量的包含PWM载波谐波的电流波形，用三维有限元方法估算了电压型逆变器(VSI)驱动下的电机损耗。在计算电机损耗的基础上，采用基于三维有限元的热分析方法，对永磁体的温度分布进行了分析。通过将测量的永磁体温度与计算的永磁体温度进行比较，证明了该方法能够定量地评价永磁体的温度分布。
To cope with the demagnetization risk of permanent magnets used in interior permanent magnet synchronous motor (IPMSM), an accurate thermal analysis of the permanent magnets is very important at the motor design stage. In this paper, an approach to predict the permanent magnet temperature distribution in IPMSM installed on traction drive for hybrid vehicles is presented. To achieve an accurate thermal analysis, the motor losses under PWM -voltage source inverter (VSI) drive are firstly estimated by 3D-FEM using measured current waveform including PWM carrier harmonics. Based on the calculated motor losses, 3D-FEM-based thermal analysis is employed to clarify the temperature distribution of the permanent magnet. Through comparisons of the measured permanent magnet temperature with the calculated one, it is demonstrated that the proposed approach makes it possible to evaluate the temperature distribution of the permanent magnet quantitatively.