A novel ZCT-PWM type full bridge DC/DC Converter is proposed. This circuit realizes the ZCS of the main switches and the auxiliary switch, while achieving the soff recovery of the secondary side diodes. In the full range of loads, it can be operated in the constant frequency softswitching mode. A 5KW IOOKHz IGBT type SMPS module has achieved efficiency as high as 96%.simulation results and its experiment results in a 5KW loOKHz SMPS module.
n. CONCEPT OF FW-ZCS-PWM and HW-ZCS-PWMAccording to the graph theory and electric network theory, a basis power conversion unit (BCU) can be abstracted from a power electronics converter[g1, and shown in Figl.
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