Method to enhance the short-circuit running reliability of current-controlled two-stage inversion power supply
Method to enhance the short-circuit running reliability of current-controlled two-stage inversion power supply
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DOI：
10.1049/iet-pel.2010.0099
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发表时间：
2011-05
影响因子：
2
通讯作者：
Jie Chen;Chunying Gong
中科院分区：
文献类型：
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作者：
Jie Chen;Chunying Gong
在航空等高可靠性要求的场合，对逆变电源的短路运行能力提出了具体要求。由于逆变器在无法减小的短路电流下运行，并且在使用滞环电流控制时，由于输出电压为零，开关频率处于最大。电源开关的传导和开关损耗均远大于正常操作时的损耗。这会导致过热，这是电源开关的主要杀手。为了提高短路运行可靠性，传统的做法是增加开关的额定功率和散热器的体积，但其成本大大增加。本研究提出了一种提高电流控制两级逆变电源短路运行可靠性的新方法。可有效提高短路运行可靠性。而且，由于开关的额定功率和散热器的体积都没有增加，因此成本也降低了。对该方法的关键问题进行了详细的理论分析。制作了一款以双Buck逆变器为逆变部分的200W两级逆变电源。仿真和实验结果验证了该方法的有效性。
On aviation and other high-reliablity required occasions, specific requirements of short-circuit running ability are put forward to the inversion power supply. As the inverter is running with short-circuit current which cannot decrease, and the switching frequency is at the maximum when using hysteretic current control because the output voltage is zero. Both conduction and switching dissipations of power switches are much greater than those of normal operation. This leads to overheating which is a major killer to the power switches. To enhance short-circuit running reliability, the traditional approach is to increase the switches' power rating and the volume of heat sink, but its cost is greatly increased. In this study, a new method enhancing the short-circuit running reliability of current controlled two-stage inversion power supply is proposed. It can increase short-circuit running reliability effectively. What is more, the cost also decreases because of the non-increasing of both power rating of switches and the volume of heat sink. The key issues of this method are theoretically analysed in detail. A 200 W two-stage inversion power supply with a dual Buck inverter as its inverter part is made. The validity of this method is verified by its simulation and experimental results.