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首页> 外文期刊>IEEE Transactions on Power Electronics >New method of power control for series-parallel load-resonant converters maintaining zero-current switching and unity power factor operation
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New method of power control for series-parallel load-resonant converters maintaining zero-current switching and unity power factor operation

机译：串联并联负载谐振转换器的功率控制新方法，可保持零电流开关和统一功率因数操作

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摘要

A power supply incorporating a series-parallel load-resonant converter capable of efficient operation over a wide range of output power is presented. The series-parallel resonant converter is shown to have three resonant frequencies. Operation of the circuit at each of these resonant frequencies maintains zero-current switching and high-frequency operation. The resonant circuit is designed to have different circuit resistances at each resonant frequency. The power delivered to the circuit, and hence the load, will therefore vary depending on which resonant frequency the circuit is excited at. This is the basis of a new method of power control for load-resonant converters disclosed in this paper. A welding power supply is designed and constructed which delivers pulsed output currents of 150 A while operating at 100 kHz and 60 A at 65 kHz. The power supply contains an active rectifier and draws near unity power factor.
机译：提出了一种电源，该电源结合了能够在宽范围的输出功率上高效运行的串联并联负载谐振转换器。示出了串联-并联谐振转换器具有三个谐振频率。电路在这些谐振频率中的每个频率下的操作均保持零电流开关和高频操作。谐振电路设计为在每个谐振频率下具有不同的电路电阻。因此，传递到电路的功率以及负载将根据电路被激发的谐振频率而变化。这是本文所公开的负载谐振转换器功率控制新方法的基础。设计和构造了一种焊接电源，该电源在工作于100 kHz时可提供150 A的脉冲输出电流，而在65 kHz时可提供60 A的脉冲输出电流。电源包含一个有源整流器，并消耗接近1的功率因数。

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