Consideration for the pulse-link DC-AC converter for fuel cells

This paper proposes a novel topology of DC-AC converter for fuel cells application, and considers the input- current reduction method. The conventional DC-AC converter for Fuel Cells has large capacitor between boost converter stage and PWM converter stage, in order to reduce input-current ripple. That capacitor disturbs to reduce the size of unit. The proposed DC-AC converter provides boosted-voltage pulse directly to PWM inverter. So, this topology is no need to insert large capacitor. Furthermore, the series LC circuit which is inserted on proposed circuit topology works as ripple canceling. This paper shows the mechanism of current-ripple reduction. Moreover, active input current-ripple reduction method is shown. Using this method, input current ripple becomes 1[A].