| Title |
The Characteristics Analysis and Design of High-Frequency Isolated Type ZVZCS PS-PWM DC-DC Converter with Fuel Cell Generation System |
| Authors |
Sang-Pil Mun ; Dong-Hun Kim ; Hyun-Woo Lee ; Soon-Kurl Kwon ; Ki-Young Suh |
| Keywords |
Full-Bridge DC-DC Converter ; High Frequency Transformer ; Phase Shifted PWM Control ; Lossless Snubber Capacitors ; Tapped Inductor Filter ; Freewheeling Diode |
| Abstract |
In this paper, the proposed full-bridge high frequency isolated zero voltage and zero current switching phase shifted pulse width modulation(ZVZCS PS-PWM)DC-DC converter among fuel cell generation system consist of 1.2[㎾] fuel cell of Nexa Power Module, full-bridge DC-DC converter to boost the fuel cell low voltage(28～43[VDC]) to 380[VDC] and a single phase full-bridge inverter is implemented to produce AC output(220[VAC], 60[㎐]). A tapped inductor filter with freewheeling diode is newly implemented in the output filter of the proposed full-bridge high frequency isolated ZVZCS PS-PWM DC-DC converter to suppress circulating current under the wide output voltage regulation range, thus to eliminate the switching and transformer turn-on/off over-short voltage or transient phenomena. Besides the efficiency of 93-97[%]is obtained over the wide output voltage regulation ranges and load variations. |