Abstract
This study introduces a unified intermittent modulation (UIM) approach to augment the power efficiency of a 150-V, 1-kW three-phase dual-active-bridge (3ph-DAB) dc-dc converter during light load condition. The mismatch between the DC-link voltage and transformer turns ratio leads to the loss of soft-switching capabilities during light load condition, increasing power losses in a 3ph-DAB converter. To address this problem, a UIM is proposed for the 3ph-DAB converter to extend the zero voltage switching (ZVS) range and reduce the overall power loss under light load condition. A theoretical analysis of UIM, including transmission power and ZVS characteristics, is presented. The implementation and validation through 150-V 1-kW 3ph-DAB converter experimental prototype shows that the UIM strategy effectively elevates light load power efficiency when the output power is lower than 0.16 per unit (p.u.) and achieves a maximum efficiency improvement of 12.7%.
| Original language | English |
|---|---|
| Pages (from-to) | 4200-4210 |
| Number of pages | 11 |
| Journal | IEEE Transactions on Industry Applications |
| Volume | 62 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 May 2026 |
Free Keywords
- Three-phase bidirectional isolated dual-active-bridge (3ph-DAB) DC-DC converter
- and light load efficiency
- asymmetrical modulation
- unified intermittent modulation (UIM)
ASJC Scopus subject areas
- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering
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