@article{iyer_gulur_gohil_bhattacharya_2020, title={An Approach Towards Extreme Fast Charging Station Power Delivery for Electric Vehicles with Partial Power Processing}, volume={67}, ISSN={["1557-9948"]}, url={https://doi.org/10.1109/TIE.2019.2945264}, DOI={10.1109/TIE.2019.2945264}, abstractNote={This article proposes an approach for realizing the power delivery scheme for an extreme fast charging (XFC) station that is meant to simultaneously charge multiple electric vehicles (EVs). A cascaded H-bridge converter is utilized to directly interface with the medium voltage grid while dual-active-bridge based soft-switched solid-state transformers are used to achieve galvanic isolation. The proposed approach eliminates redundant power conversion by making use of partial power rated dc–dc converters to charge the individual EVs. Partial power processing enables independent charging control over each EV, while processing only a fraction of the total battery charging power. Practical implementation schemes for the partial power charger unit are analyzed. A phase-shifted full-bridge converter-based charger is proposed. Design and control considerations for enabling multiple charging points are elucidated. Experimental results from a down-scaled laboratory test-bed are provided to validate the control aspects, functionality, and effectiveness of the proposed XFC station power delivery scheme. With a down-scaled partial power converter that is rated to handle only 27% of the battery power, an efficiency improvement of 0.6% at full-load and 1.6% at 50% load is demonstrated.}, number={10}, journal={IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Iyer, Vishnu Mahadeva and Gulur, Srinivas and Gohil, Ghanshyamsinh and Bhattacharya, Subhashish}, year={2020}, pages={8076–8087} }
 @inproceedings{chattopadhyay_gohil_bhattacharya_2017, title={Split-winding type three limb core structured HF transformer for integrating PV and energy storage(ES)}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-85020040493&partnerID=MN8TOARS}, DOI={10.1109/apec.2017.7931123}, abstractNote={The work presented in this paper focuses on the drawbacks of three limb three winding transformer for use in three port dc-dc converter and proposes a split-winding type transformer approach using three limb core for use in three port dc-dc converter. The three limb three winding type transformer has drawback due to limitation of power flow when one port is idle and also has a very limited ZVS operating region for phase shift control. The proposed split-winding type transformer has the equivalent circuit of single core based transformer, has no limitation of power flow when one of the three port is idle and has wide ZVS range. Detailed analysis for idle condition operation, equivalent circuit derivation and ZVS operating range analysis is carried out in this paper.}, booktitle={Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC}, author={Chattopadhyay, R. and Gohil, G. and Bhattacharya, Subhashish}, year={2017}, pages={2997–3004} }