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首页> 外文期刊>Power Electronics, IET >Evaluation of current stresses in nine-switch energy conversion systems
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Evaluation of current stresses in nine-switch energy conversion systems

机译：九开关能量转换系统中的电流应力评估

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摘要

Converters with reduced-switch counts usually face some performance tradeoffs, which make them suitable for some applications but not others. The same applies to the nine-switch converter, which is a reduced-switch version of the back-to-back twelve-switch converter. The nine-switch converter has since been shown to experience a higher voltage stress, which can be lowered in some cases. A corresponding evaluation of its current stress is however lacking, and is hence addressed now by computing its switch currents when used for ac–ac, ac–dc, dc–ac and dc–dc energy conversions. Relevant expressions, application requirements and simulation results are presented for identifying cases, where the nine-switch converter can have an improvement in performance despite its reduced-switch count. These cases are verified in experiments using a 1.5 kW prototype built in the laboratory.
机译：开关数量减少的转换器通常会面临一些性能折衷，这使其适合于某些应用，但不适用于其他应用。九开关转换器也是如此，它是背靠背十二开关转换器的降压版本。从那以后，九开关转换器已表现出较高的电压应力，在某些情况下可以降低该应力。但是，尚缺乏对其电流应力的相应评估，因此，当用于ac-ac，ac-dc，dc-ac和dc-dc能量转换时，可以通过计算其开关电流来解决。给出了相关的表达式，应用要求和仿真结果，以识别九开关转换器，尽管其开关数量减少，但仍可以提高性能。这些情况在实验室中使用1.5 kW原型制作的实验中得到了验证。

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