A Novel High Gain Switched Capacitor Topology for Fuel Cell Vehicles with Wide Voltage Gain

Abstract

In this paper, a non isolated high gain dc-dc converter topology is proposed for the fuel cell vehicle application. The proposed switch capacitor based step up topology with common ground structure provides high voltage gain for a wide range of input voltage with lower voltage stress on the capacitors and power devices. The two phase interleaved structure at the input terminal reduces the input current ripple of the fuel cell. The input inductor currents are self balanced and operates at half of the total input current. In addition, the proposed converter have the ability to operate over a wide duty ratio range without compromising the system performance. The proposed converter can integrate low voltage FC stack (35–65 V) to 400V dc-link, suited for fuel cell vehicle application.