具有宽电压调节范围的谐振型变流器

Resonant convertor with a wide range of voltage regulation

针对传统的变流器中输出电压一般总是低于交流输入电压的状况，提出了一种新型串联谐振直流环节变流器。该变流器在取消直流大电感，并为开关器件提供零电流开关条件的同时，还可以实现变流器输出电压在交流输入电压以上或以下的较宽范围内任意调节，而不受输入电压大小的限制。介绍了电路的工作原理，给出了升压及降压时两组有代表性的试验波形。

In view of the situation that the output voltage is always lower than the AC input one on conventional convertor, a new type of series resonant convertor without DC inductance is proposed, which not only makes the zero current switching possible for the switch gear, but also provides a wide range of voltage regulation beyond or beneath the AC input voltage without any limitation from the input voltage. In this paper, the operation principle is presented together with two groups of typical experimental waveforms.