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High efficiency AC-DC converter with power factor corrector

机译:具有功率因数校正功能的高效AC-DC转换器

摘要

A power converter includes a boost converter, a DC/DC converter and a coupler chain. The boost converter receives a rectified AC input and generates a high voltage output. The boost converter includes a zero-voltage-switching transistor that is operable to adjust the power factor of the rectified AC input to generate the high voltage output. The DC/DC converter is coupled to the high voltage output of the boost converter and is configured to generate a regulated output voltage. The DC/DC converter includes a complementary pair of zero-voltage-switching transistors that are operable to regulate the high voltage output of the boost converter to generate the regulated output voltage. The coupler chain is coupled between a current-carrying terminal of the zero-voltage-switching transistor of the boost converter and current-carrying terminals of the complementary pair of zero-voltage-switching transistors in the DC/DC converter The coupler chain is operable to reduce the voltage across the current-carrying terminals of at least one of the zero-voltage-switching-transistors.
机译:功率转换器包括升压转换器,DC / DC转换器和耦合器链。升压转换器接收整流的交流输入并产生高压输出。升压转换器包括零电压开关晶体管,该零电压开关晶体管可操作来调节整流的AC输入的功率因数以产生高电压输出。 DC / DC转换器耦合到升压转换器的高压输出,并且被配置为产生稳定的输出电压。该DC / DC转换器包括一对互补的零电压开关晶体管,其可操作为调节升压转换器的高压输出以产生调节后的输出电压。耦合器链耦合在升压转换器的零电压开关晶体管的载流端子和DC / DC转换器中的一对零电压开关晶体管的互补对的载流端子之间。以降低至少一个零电压开关晶体管的载流端子两端的电压。

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