| Title |
A Study on Power Conversion System for Fuel Cell Controlled by Micro-Processor |
| Authors |
Ju-Yong Kim ; Sang-Hwa Jung ; Sang-Pil Mun ; Jae-Yup Ryu ; Ki-Young Suh |
| Keywords |
Fuel Cell Power Conversion System ; Phase-Shift ; High Frequency Transformer |
| Abstract |
In the dissertation, a power conversion system for fuel cell is composed of a PWM inverter with LC filter in order to convert fuel cell voltage to a single phase 220[V]. In addition, new insulated OC-OC converters are proposed in order that fuel cell voltage is boosted to 380[V]. In this paper, it requires smaller components than existing converters, which makes easy control. The proposed OC-OC converter controls output power by the adjustment of phase-shift width using switch S? and S? in the secondary switch, which provides 93-97[%] efficiency in the wide range of output voltage. Fuel cell simulator is implemented to show similar output characteristics to actual fuel cell. Appropriate dead tirre td enables soft switching to the range where the peak value of excitation current in a high frequency transformer is in accordance with current in the primary circuit Moreover, appropriate setting to serial inductance La reduces communication loss arisen at light-load generator and serge voltage arisen at a secondary switch and serial diode. Finally, TMS320C31 board and EPLD using PWM switching technique to act a single phase full-bridge inverter which is planed to make alternating current suitable for household |