A single-stage AC/DC converter includes a boost PFC AC/DC converter and a half-bridge split-capacitor DC/DC converter. The boost PFC AC/DC converter includes a boost inductor, and the half-bridge split-capacitor DC/DC converter includes an inductor in series with a primary winding of a transformer. A method of operation of a single-stage AC/DC converter that includes a boost PFC AC/DC converter and a half-bridge split-capacitor DC/DC converter includes modulating a switching frequency of at least one switch. The method may further include maintaining a constant duty cycle, for example a duty cycle of 0.5. An implementation of the boost inductor in a boost PFC AC/DC converter of a single-stage AC/DC converter includes a variable boost inductor, such as two inductors of approximately equal inductance, and a boost inductor switching circuit, such as two single-pole, double-throw relays.
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机译:单级AC / DC转换器包括升压PFC AC / DC转换器和半桥分体电容DC / DC转换器。升压PFC AC / DC转换器包括升压电感器,半桥分流电容器DC / DC转换器包括串联串联的电感器,该电感器具有变压器的初级绕组。单级AC / DC转换器的操作方法,包括升压PFC AC / DC转换器和半桥分流电容器DC / DC转换器包括调制至少一个开关的开关频率。该方法还可以包括保持恒定占空比,例如0.5的占空比。单级AC / DC转换器的升压PFC AC / DC转换器中的升压电感器的实现包括可变升压电感器,例如近似等电感的两个电感器,以及升压电感器开关电路,例如两个单一 - 杆,双扔继电器。
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