电力电子器件损耗的测试与计算研究

Test and calculation of power electronic device loss

电力电子器件是功率变换装置系统的主要组成部分,在工作中会产生功率损耗,降低了能量转换效率,损耗过大还会影响到器件自身安全和系统的性能指标。以Buck电路为对象作为器件IGBT损耗测试的实验平台,设定了几种器件损耗的主要影响因素,并建立基准值。通过这些影响因素的不同取值对IGBT反复测试,测出示波器中IGBT工作时的电压和电流波形后,转化成数据的方式来保存输出结果到计算机,利用算法编程来计算出相应损耗功率值。最后,对影响损耗的相关因素进行分析和总结。

Power electronic devices produced power loss in its work, which was the main component of the power converter system, and reduced the energy conversion efficiency, excessive loss also menaced the device＇s own security and performance indicators. The experimental platform of the IGBT loss test based on the Buck circuit, and the main influencing factors are set up, and the reference value is established. The voltage and current waveforms of the IGBT in the oscilloscope are measured after the IGBT losses are repeated testing with the different values of the influence factors, and saved the output of the data to the computer, used the algorithm programming to calculated the corresponding loss power value. In the end, the related factors affecting the loss are analyzed and summarized.