Abstract
In this study, a fast charger for electric vehicle with wide charging voltage range is proposed. To achieve high efficiency, three-level topologies are employed for the AC-DC and DC-DC converters. Given that the output range of the DC-DC converter in fast chargers is quite wide, the circulating current of conventional three-level converter will increase under low voltage condition. The proposed hybrid switching method mitigates this issue. When a coupled inductor is used on the output side, the circulating current is further reduced, and the switches S2, S3, S6, and S7 achieve turning-off under the ZCS condition. Experimental results from a 50 kW prototype are provided to validate the proposed charger, and a rated efficiency of 95.9% is obtained.
| Translated title of the contribution | Development of 50kW High Efficiency Fast Charger with Wide Charging Voltage Range |
|---|---|
| Original language | Korean |
| Pages (from-to) | 267-274 |
| Number of pages | 8 |
| Journal | 전력전자학회 논문지 |
| Volume | 21 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jun 2016 |