一种新颖的宽范围双管正激型DC/DC变换器

该文提出了一种RCD复位双管正激型DC／DC变换器。它继承了RCD复位单管正激变换器占空比可以大于50％的优点,克服了RCD复位单管正激变换器开关电压应力大和励磁能量完全消耗在R上而使得变换效率低的缺点。所推荐的RCD复位双管正激型DC／DC变换器的复位电容只起到补偿复位的作用,复位电阻R上消耗的能量只是原来RCD复位单管正激变换器的几分之一。因此该变换器可以应用于高压输入场合或是宽范围、高效率要求的场合,可提高RCD复位方式的可行性和实用性。最后通过实验证实了该拓扑上述的优点。

A NOVEL WIDE RANGE DUAL SWITCH FORWARD DC/DC CONVERTER

A novel topology named "RCD reset dual switch forward DC/DC converter" is proposed and compared with the original one and shown that the new one wins merit in the duty cycle of more than 50% bigger, meanwhile, it overcomes the demerit of high voltage stress on the main switches and low efficiency due to the energy consumption for the excitation in reset resistor. In the proposed topology, the reset capacitor acts only as a compensation, the energy consumption on the resistor R of converters plays a small role for a small fraction, and therefore, the proposed converter may be applied for the high voltage input or in case of wide range, high efficiency is required i.e. it promotes the feasibility and applicability of the new-type converter. All said above are proved by experiments.