非正弦供电下的变系数铁耗模型

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摘要为了计算非正弦供电下的电动机定子铁心损耗,分析损耗系数随频率和磁通密度的变化规律,本文提出一种改进的变系数铁心损耗计算模型。该模型考虑了由于非正弦供电带来的电动机中的高次谐波和趋肤效应的影响,以及供电基频不同造成的铁耗系数变化。通过对非正弦供电的电压特征参数进行分析,以供电电压基波的铁耗乘以电压特征参数来计算总的铁心损耗,简化了传统的磁通谐波分解并叠加各次谐波铁耗的方法。利用该模型计算了一台SPWM逆变器供电电动机的定子铁心损耗,并与实验结果进行了比较。实验表明,该模型的计算结果与实验结果的相对误差在可接受范围内,平均相对误差不超过10%。该模型对于电动机铁心损耗问题的进一步研究具有参考意义。

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	周腊吾
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	汤辉
	侯绍虎

关键词 ：铁心损耗, 非正弦供电, 趋肤效应, 变系数

Abstract：In order to calculate the motor stator core loss of as non-sinusoidal power supply, and analyze the loss coefficients’ rules changed with frequency and magnetic flux density, this paper proposes an improved variable coefficient core loss calculation model. The model considers the influence of high order harmonics and skin effect brought by the non-sinusoidal power supply, and the iron loss coefficients’ variability due to the different fundamental frequencies of power supply. With the analysis of the characteristic parameters of the non-sinusoidal power supply voltage, calculate the total core loss with the fundamental supply voltage iron loss multiplied by the voltage characteristic parameters, and simplify the traditional method of decomposing the magnetic flux harmonics and superposing each harmonic iron loss together. By using this model, calculate the stator iron core loss of a motor supplied by an SPWM inverter, and compare the calculation results with the experiments. Comparison has shown that the relative error of the calculation results and the experiments are within the acceptable range, and the average relative error is less than 10%. The model has referenced significance for further study of the motor iron loss problem.

Key words： keywords：Core loss non-sinusoidal power supply skin effect variable coefficient

收稿日期: 2012-09-20 出版日期: 2013-12-12

PACS:

TM346.2

基金资助:国家国际科技合作专项资助项目(2011DFA62890)。

作者简介: 胡雪婷女，1988年生，硕士研究生，研究方向为电机电器及其控制。周腊吾男，1965年生，博士，教授，博士生导师，研究方向为电机电器及其控制。

引用本文:

周腊吾, 胡雪婷, 徐超, 苏清杰, 汤辉, 侯绍虎. 非正弦供电下的变系数铁耗模型[J]. 电工技术学报, 2013, 28(1增): 87-90. Zhou Lawu, Hu Xueting, Xu Chao, Su Qingjie, Tang Hui, Hou Shaohu. Variable Coefficient Core Loss Model Under Non-Sinusoidal Power Supply. Transactions of China Electrotechnical Society, 2013, 28(1增): 87-90.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I1增/87

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