基于直流电压注入的永磁同步电机定子绕组温度在线估计

发布时间：2018-04-15 11:05

本文选题：永磁同步电机 + 信号注入　；参考：《电工技术学报》2017年20期

【摘要】：提出一种新的永磁同步电机定子绕组实时温度在线估计方法。该方法无需温度传感器,也无需改变电机驱动系统的硬件,仅需在矢量控制中向α轴注入直流电压信号,通过在线辨识定子电阻并结合金属材料温度与阻值的线性关系实现定子绕组实时温度的估计。该方法特别适用于大功率电机,注入较小的信号即可在相绕组上产生相对较大的直流电流,减小了在交流相电流中提取直流电流分量的难度和温度估计误差。提出三种定子电压直流分量的获取方法,并给出讨论分析和对比结果,其中直接采用所注入信号实现温度估计的方法,无需对相交流电压采样和后处理得到直流分量,估计精度较高。仿真和实验验证了所提方法的有效性。
[Abstract]:A new method for real time temperature estimation of permanent magnet synchronous motor stator windings is proposed.This method does not need temperature sensor or change the hardware of motor drive system, but only need to inject DC voltage signal into 伪 axis in vector control.The real-time temperature estimation of stator windings is realized by on-line identifying stator resistance and combining the linear relationship between metal material temperature and resistance value.This method is especially suitable for high power motor. The relatively large DC current can be generated on the phase winding by injecting small signal, which reduces the difficulty of extracting DC current component from AC phase current and the temperature estimation error.Three methods of obtaining DC component of stator voltage are presented, and the results of analysis and comparison are given. The method of temperature estimation is adopted directly by the injected signal, and the DC component is obtained without sampling and post-processing of phase AC voltage.The estimation accuracy is high.The effectiveness of the proposed method is verified by simulation and experiments.
【作者单位】：湖南大学国家电能变换与控制工程技术研究中心;美国旧金山州立大学理工学院;遵义长征电器开关设备有限责任公司;
【基金】：国家自然科学基金资助项目(51507055)
【分类号】：TM341

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