Modeling and Verification of Electrical Stress in Inverter-Driven Electric Machine Windings
Modeling and Verification of Electrical Stress in Inverter-Driven Electric Machine Windings
复制标题
逆变器驱动电机绕组中电应力的建模和验证
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
M. Degner
中科院分区：
文献类型：
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作者：
Yanyan Xie;Julia Zhang;F. Leonardi;A. R. Munoz;F. Liang;M. Degner
本文建立了详细的模型，用于预测由脉宽调制（PWM）逆变器驱动的电机绕组的单个导体中的电压和电流分布。这是更好地理解PWM励磁电压如何对逆变器驱动电机的绕组绝缘施加应力的第一步。针对电机绕组寄生参数随频率变化的特点，建立了电机绕组的高保真有限元模型。该模型能够研究导线位置对绕组寄生参数的影响，从而得到单个导体的电压和电流分布。为了验证有限元模型的真实性，建立了一个具有手动绕制绕组的定子铁芯。使用一个形状缠绕绕组和一个随机缠绕绕组与减少数量的导体在槽进行测试，以获得实际的电压和电流分布在个别导体。最后，有限元方法被应用于模拟一个复杂的绕组结构，多匝串联和并联分支，研究单个导体的电压和电流分布和导线位置的影响。
This paper develops detailed models for predicting the voltage and current distributions in individual conductors of electric machine windings driven by pulse width modulation (PWM) inverter drives. This is the first step to better understand how PWM excitation voltage stresses the winding insulation of inverter-driven electric machines. A high-fidelity finite element (FE) model of electric machine windings was developed to account for frequency-dependent winding parasitic parameters. The model is capable of investigating the impacts that wire positions have on the winding parasitic parameters, hence the voltage and current distributions of individual conductors. A stator core with manually-wound windings was built to verify the fidelity of the FE model. Tests using both a form-wound winding and a random-wound winding with reduced number of conductors in slots were conducted to obtain the actual voltage and current distributions in individual conductors. Finally, the FE approach was applied to simulate a complicated winding structure with multiple serial turns and parallel branches to investigate the voltage and current distributions in individual conductors and the effects of wire positions.