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A Single-Stage Soft-Switching AC/DC Converter without Soft-Switching Auxiliary Circuit

机译:没有软开关辅助电路的单级软开关AC / DC转换器

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This paper proposed a single-stage soft-switching AC/DC converter without soft-switching auxiliary circuit. The proposed AC/DC converter only uses two main active switches to execute the input power factor correction and regulate the output dc voltage magnitude. Thus, the input power factor is high and the input current distortion is low on the ac input side. Moreover, the output DC voltage is stable and its ripple is low. Although the proposed AC/DC converter does not include soft-switching auxiliary circuit, the all main semiconductors can switch at soft-switching condition. Thus, the circuit topology is simple and the circuit cost is low. Furthermore, the proposed AC/DC converter does not also include front-end four-diode rectifier on the ac input side. The conduction losses can also be reduced. The proposed AC/DC converter uses a simple frequency modulation control strategy to synthesize a low harmonics sinusoidal input current waveform and achieve well dynamic regulation function. A design example of 600W single-stage soft-switching AC/DC converter is examined to assess its performance.
机译:本文提出了一种不带辅助开关的单级软开关交直流变换器。提出的AC / DC转换器仅使用两个主有源开关来执行输入功率因数校正并调节输出dc电压幅度。因此,交流输入侧的输入功率因数高,输入电流失真低。此外,输出直流电压稳定且纹波低。尽管所提出的AC / DC转换器不包括软开关辅助电路,但是所有主半导体都可以在软开关条件下进行开关。因此,电路拓扑简单并且电路成本低。此外,所提出的AC / DC转换器在交流输入侧还不包括前端四二极管整流器。传导损耗也可以减少。提出的AC / DC转换器使用简单的频率调制控制策略来合成低谐波正弦输入电流波形,并实现良好的动态调节功能。研究了一个600W单级软开关AC / DC转换器的设计示例,以评估其性能。

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