Design of Experiments for Stator Windings Insulation Degradation under High dv/dt and High Switching Frequency
Design of Experiments for Stator Windings Insulation Degradation under High dv/dt and High Switching Frequency
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DOI：
10.1109/ecce44975.2020.9235940
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发表时间：
2020-10
期刊：
影响因子：
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通讯作者：
F. Alvarez-Gonzalez;D. Hewitt;A. Griffo;Jiabin Wang;M. Diab;Xibo Yuan
中科院分区：
文献类型：
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作者：
F. Alvarez-Gonzalez;D. Hewitt;A. Griffo;Jiabin Wang;M. Diab;Xibo Yuan
与传统的硅基 IGBT 转换器相比，SiC 功率器件因其卓越的性能和更高的电机驱动效率而受到越来越多的关注。然而，与 IGBT 同类产品相比，碳化硅 (SiC) 具有更高的开关频率和更快的开关瞬态（高 dv/dt），可能会导致电机应力增加。为了量化这些对机器绝缘寿命的不利影响，对牵引和工业应用中使用的典型低压机器的电气定子进行了一系列测试。采用实验设计 (DoE) 方法来确定使用三个压力源的测试序列。具体地，分别考虑DC链路电压电平、电压波形的上升时间或转换速率以及开关频率的三个值。本文描述了计划的测试和条件、采用的绝缘健康监测方法以及初步结果。
SiC power devices are gaining increased interest due to their superior performance and increased efficiency in motor drives compared to traditional Si-based IGBT converters. However, the increased switching frequency and much faster switching transients (high dv/dt) of Silicon Carbide (SiC) compared to their IGBT counterparts, can result in increased stress in electrical machines. To quantify these detrimental effects on machine insulation lifetime, a series of tests are conducted on electrical stators representative of typical low voltage machines used in traction and industrial applications. A Design of Experiment (DoE) methodology is employed to identify the test sequence using three stressors. In particular, three values of DC link voltage level, rise time or slew rate of the voltage waveform, and switching frequency, respectively are considered. The paper describes the planned tests and conditions, the insulation health monitoring method employed, and preliminary results.