Abstract

This paper considers the opportunities for improving the reliability of power semiconductor converters by increasing the installed capacity margin and modifying the configuration of power circuit diagrams. As shown by regression analysis, the unit cost of an autonomous voltage inverter with an increase in the installed capacity of the frequency converter rises by about 25%. It is shown that the machine and the semiconductor converter are used most efficiently in six phases, whereas the number of valves in the semiconductor converter is 4m, where m is the number of phases. A further increase in the number of phases does not significantly reduce the phase current, but significantly increases the number of keys in the valve converter. It is shown that an increase in the phase of power circuit layouts allows using the electric machine more fully in terms of capacity and reduce the phase current in semiconductor converters by more than twofold. It is established that the new solutions allow reducing by almost twofold the number of failures in electric drives of more than 500 kW in capacity, while the costs of power electric equipment increase by no more than 25%.

中文翻译：

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提高半导体转换器的可靠性

摘要

本文考虑了通过增加安装容量裕度和修改电源电路图的配置来提高功率半导体转换器可靠性的机会。如回归分析所示，随着变频器安装容量的增加，自动电压逆变器的单位成本将增加约25％。结果表明，在六个阶段中，机器和半导体转换器的使用效率最高，而半导体转换器中的阀门数量为4 m，其中m是阶段数。相数的进一步增加不会显着减小相电流，但是会显着增加阀转换器中的键数。示出了，功率电路布局的相位的增加允许在容量方面更充分地使用电机并且将半导体转换器中的相电流减小两倍以上。可以确定的是，新解决方案可以将容量超过500 kW的电力驱动器的故障数量减少几乎两倍，而电力电气设备的成本增加不超过25％。