This paper presents a comparison of buck-boost partial power converters (PPC) for the DC-DC conversion stage of an electrical vehicle (EV) fast charging station. By using a DC-DC buck-boost structure, the proposed fast charger can operate with wide output voltage range. The proposed topology can be used to charge either 400V or 800V batteries. Since the PCC only processes a fraction of the total power, high efficiency is obtained. Two different buck-boost PPC topologies are compared. First structure consider two-quadrant switches in order to obtain bipolar voltage, while the second structure uses an unfolding bridge to change the voltage polarity. Results show that the first solution with two-quadrant switches allows better efficiency. The proposed converter operation is then evaluated for fast charging applications for both 400V and 800V batteries, showing high efficiency up to 99%, making the proposed solution very attractive for fast charging application.
|Title of host publication||IECON 2021 - 47th Annual Conference of the IEEE Industrial Electronics Society|
|Publisher||IEEE Computer Society|
|State||Published - 13 Oct 2021|
|Event||47th Annual Conference of the IEEE Industrial Electronics Society, IECON 2021 - Toronto, Canada|
Duration: 13 Oct 2021 → 16 Oct 2021
|Name||IECON Proceedings (Industrial Electronics Conference)|
|Conference||47th Annual Conference of the IEEE Industrial Electronics Society, IECON 2021|
|Period||13/10/21 → 16/10/21|
Bibliographical noteFunding Information:
ACKNOWLEDGMENT This work was supported by Fondecyt 1191532, AC3E (ANID/BASAL/FB0008), Fondequip EQM180215, SERC Chile (ANID/FONDAP/15110019), Universidad de los Andes under program Fondo de Apoyo a la Investigación (FAI), and also in part by ANID/PFCHA Magister Nacional 2019 under Grant 22191615.
© 2021 IEEE.
- Buck-Boost converter
- electric vehicle
- Partial power converter