| Title |
A Single-Stage AC-DC Power Module Converter for Fast-Charger |
| Authors |
Tat-Thang LE ; Sewan Choi |
| DOI |
https://doi.org/10.6113/TKPE.2022.27.5.384 |
| Keywords |
Fast charger station; Single-stage AC-DC; Push-pull |
| Abstract |
In this study, a single-stage, four-phase, interleaved, totem-pole AC-DC converter is proposed for a super-fast charger station that requires high power, a wide voltage range, and bidirectional operation capabilities and adopts various types of electric transport vehicles. The proposed topology is based on current-fed push-pull dual active bridge converter combined with the totem-pole operation. Owing to the four-phase interleaving effect, the bridge on the grid side can switch at 0.25, 0.5, and 0.75 to achieve a ripple-free grid current. The input filter can be removed theoretically. Switching methods for the duty of the secondary-side duty cycle are proposed, and they correspond to the primary duty cycle for reducing the circulating power and handling the total harmonic distortion. Therefore, the converter can operate under a wide voltage range. Experimental results from a 7.5 kW prototype are used to validate the proposed concept. |