Patent ID: 7254043

Claim:
A power converter for inputting and performing an electrical characteristics transformation on an input voltage from a fuel battery to output an output voltage to a loading, comprising: a multiple-phase PWM controller to output a plurality of PWM control signals in accordance with the voltage level of the output voltage; a bridge converter to input and output the input voltage in accordance of the PWM control signals; and a transformer to input and perform an electrical characteristics transformation on the input voltage from the bridge converter to output the output voltage; wherein the phase PWM controller further comprises a PWM generator and at least one phase shifter; and wherein the PWM generator outputs a first PWM control signal and a fourth PWM control signal based on the voltage level of the output voltage, and the at least one phase shifter outputs a third PWM control signal, a sixth PWM control signal, a fifth PWM control signal, and a second PWM control signal respectively in accordance with the first PWM control signal or the fourth PWM control signal.