Journal
IEEE ACCESS
Volume 8, Issue -, Pages 2750-2759Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2019.2961788
Keywords
DC; DC converter; full-bridge three-level; phase-shift control; wide input voltage range; zero-voltage switching (ZVS)
Categories
Funding
- ForsKEL [64017-0047]
- EUDP Project Voltage control and protection [64017-0047]
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A triple-phase-shift (TPS) modulation strategy with reduced transformer's voltage stress is proposed in this paper for the diode-clamped full-bridge (FB) three-level isolated DC/DC converter. The proposed strategy can keep the transformer's maximum voltage changes (Delta V) at only half of the input voltage (V-in/2) by employing three phase-shift delays. Consequently, comparing with the conventional strategies, the merits of the proposed strategy include: 1) reducing the voltage change rate (dv/dt) on the transformer and 2) improving the transformer's voltage harmonics due to the merit of the multi-level voltage. Additionally, the proposed strategy has two operating modes with zero-voltage switching (ZVS) for fulfilling the wide input voltage range. Finally, the proposed strategy is verified by both simulation and experimental results.
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