Study and implementation of a four-phase interleaved 10-kW boost DC-to-DC converter for fuel cell applications

In this thesis, this choice of architecture is the current-fed full-bridge converter and use of voltage-double in the secondary circuit, the turns ratio can be reduced by half, thereby reducing losses, improving overall efficiency and practicality. And use interleaved PWM control mode to parallel with four modules, in order to reduce the current ripple on primary side for fuel cells. To ensure that the battery life and reliability in working condition, so design a feedback of constant voltage (CV) / constant current (CC) feedback circuit in terminal. Finally, implement a four modules in parallel 10kW DC-DC boost converter, and has a soft start time of 30 seconds to protect the fuel cells to a steady state. In the high-voltage input full load output, the maximum efficiency can reach 91%.