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Improving Power Converter Reliability: Online Monitoring of High-Power IGBT Modules

机译：提高功率转换器的可靠性：大功率IGBT模块的在线监控

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摘要

The real-time junction temperature monitoring of a high-power insulated-gate bipolar transistor (IGBT) module is important to increase the overall reliability of power converters for industrial applications. This article proposes a new method to measure the on-state collector?emitter voltage of a high-power IGBT module during converter operation, which may play a vital role in improving the reliability of the power converters. The measured voltage is used to estimate the module average junction temperature of the high and low-voltage side of a half-bridge IGBT separately in every fundamental cycle of the current by calibrating them at load current. The measurement is very accurate and also measures the voltage at the middle of a pulse-width modulation (PWM) switching. A major objective is that this method is designed to be implemented in real applications. The performance of this technique is measured in a wind power converter at a low fundamental frequency. To illustrate more, the test method as well as the performance of the measurement circuit are also presented. This measurement is also useful to indicate failure mechanisms such as bond wire lift-off and solder layer degradation. The measurements of and rise in the junction temperature after five million cycles of normal operation of the converter are also presented.
机译：高功率绝缘栅双极晶体管（IGBT）模块的实时结温度监控对于提高工业应用功率转换器的整体可靠性非常重要。本文提出了一种在变流器工作期间测量大功率IGBT模块的导通状态集电极-发射极电压的新方法，这可能对提高功率转换器的可靠性起着至关重要的作用。通过在负载电流下进行校准，在电流的每个基本周期中，所测得的电压分别用于估算半桥IGBT高低压侧的模块平均结温。该测量非常准确，并且还可以测量脉宽调制（PWM）开关中间的电压。一个主要目的是设计这种方法以在实际应用中实现。该技术的性能是在风力发电转换器中以低基频测量的。为了进一步说明，还介绍了测试方法以及测量电路的性能。此测量也可用于指示故障机制，例如键合线剥离和焊料层退化。还介绍了转换器正常运行五百万次循环后结温的测量和升高。

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