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首页> 外文会议>2016 International Conference on Electrical Power and Energy Systems >Influence of switching frequency of the voltage waveforms on breakdown in twisted pairs
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Influence of switching frequency of the voltage waveforms on breakdown in twisted pairs

机译：电压波形的开关频率对双绞线击穿的影响

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Insulation degradation in the stator winding of electrical motors fed by inverter drives has been concerned about researchers over the last two decades for obtaining adjustable speeds. The Power Electronic Converters produces a PWM waveform with fast rising pulses due to high switching frequency of IGBT's, cause's premature failure of motor winding insulation. To simulate the breakdown of motor insulation, twisted pair samples prepared using enamel wires are tested. The enamel coating is of Modified polyester (Class-F insulation) with different makes have the same thickness of 40 microns are used for testing in this work and the results are compared. The tests were performed by applying high voltage, high frequency stress of sine, triangular and square waveforms with different frequency levels of 10 KHz, 20 KHz, and 30 KHz. The test results show that the breakdown strength of the various makes with the same thickness of same enamel material differs. Moreover, as the switching frequency is increased, the life of the motor insulation is reduced.
机译：在过去的二十年中，研究人员一直在关注由变频器驱动的电动机定子绕组中的绝缘性能下降，以获得可调节的速度。由于IGBT的高开关频率，电力电子转换器会产生具有快速上升脉冲的PWM波形，从而导致电动机绕组绝缘过早失效。为了模拟电动机绝缘的故障，测试了使用漆包线制备的双绞线样品。这项工作中使用的搪瓷涂层是改性聚酯（F级绝缘），具有不同的制造工艺，具有相同的40微米厚度，用于测试，并将结果进行比较。通过施加具有10 KHz，20 KHz和30 KHz不同频率电平的正弦，三角和方波高压，高频应力来执行测试。测试结果表明，在相同厚度的相同搪瓷材料中，各种产品的击穿强度有所不同。此外，随着开关频率的增加，电机绝缘的寿命也会缩短。

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