A Two-Stage DC/DC Isolated High-Voltage Converter with Zero-Voltage Switching and Zero-Current Switching Applied in Electronic Power Conditioners

This paper presents a two-stage DC/DC converter with high efficiency utilized in an electronic power conditioner (EPC), which is widely applicable satellite communications, etc. The galvanically isolated contains two cascaded converters: buck converter, pre-regulator operating under closed-loop condition, and push–pull intended to boost the input voltage, open-loop condition. In switches, including main switches rectifier diodes, operate zero-voltage switching (ZVS) zero-current (ZCS) at both switch off on, minimizes loss. Furthermore, all of parasitic parameters, such as capacitance, leakage inductance, magnetizing inductance transformer, are fully utilized. Therefore, presented topology benefits from fewer semiconductors but higher efficiency. proposed produces less EMI noise because ZVS ZCS processes whose fundamental frequency interference relatively low. achieves wide bus voltage regulation range pre-regulation cell. theoretical analysis validated by prototype its experimental results. maximum can be up 94.5%, high-voltage output 7000 V.