Abstract
This paper presents a bidirectional CLLC converter solution for the dc-dc stage in plug-in electric vehicle (PEV) onboard battery chargers. The proposed architecture allows the converter to operate at resonance for the bidirectional constantpower (CP) load range with a variable bus voltage, while frequency modulation is employed for the constant-current (CC) load range in the grid-to-vehicle (G2V) mode with a fixed bus voltage, resulting in a limited bus voltage range. This enables the use of 650-V Gallium nitride (GaN) devices for the primary and secondary sides’ switches. The design flow is presented and a 1-kW high-frequency prototype is implemented. GaN reverse conduction characteristics are investigated and employed for the high-frequency current rectification. The prototype operates with soft switching across the operational range, achieving an efficiency of up to 95.7%, with the resonant inductances integrated in the transformer.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of 46th Annual Conference of the IEEE Industrial Electronics Society |
| Number of pages | 7 |
| Publisher | IEEE |
| Publication date | 2021 |
| ISBN (Print) | 978-1-7281-5415-2 |
| DOIs | |
| Publication status | Published - 2021 |
| Event | 46th Annual Conference of the IEEE Industrial Electronics Society - Marina Bay Sands Expo and Convention Centre, Singapore, Singapore Duration: 18 Oct 2020 → 21 Oct 2020 Conference number: 46 https://ieeexplore.ieee.org/xpl/conhome/9254213/proceeding |
Conference
| Conference | 46th Annual Conference of the IEEE Industrial Electronics Society |
|---|---|
| Number | 46 |
| Location | Marina Bay Sands Expo and Convention Centre |
| Country/Territory | Singapore |
| City | Singapore |
| Period | 18/10/2020 → 21/10/2020 |
| Internet address |
Keywords
- Electric vehicles
- dc-dc converters
- Resonant power conversion
- Wide bandgap semiconductors
- Bidirectional converters