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-dcconverter 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 ina3ph-DAB converter. To address this problem, a UIM was proposed for the3ph-DAB converter to extend the zero voltages witching (ZVS) range and reduce the overall power loss under light load condition. First, a theoretical analysis of UIM, including transmission power and ZVS characteristics, was presented. The implementation and validation through 150-V1 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 |
|---|---|
| Journal | IEEE Transactions on Industry Applications |
| DOIs | |
| Publication status | Accepted/In press - 2025 |
Free Keywords
- asymmetrical modulation
- light load efficiency
- Three-phase bidirectional isolated dual-active bridge (3ph-DAB) dc-dc converter
- unified intermittent modulation (UIM)
ASJC Scopus subject areas
- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering