On Optimized Modulation Strategies for Electric Vehicle Integrated On-board Chargers

Kougioulis, Ioannis; Zanchetta, Pericle; Wheeler, Pat; Ahmed, Md Rishad

doi:10.1109/TIA.2024.3463610

On Optimized Modulation Strategies for Electric Vehicle Integrated On-board Chargers

Kougioulis, Ioannis; Zanchetta, Pericle; Wheeler, Pat; Ahmed, Md Rishad

Authors

Ioannis Kougioulis

Pericle Zanchetta

Professor PATRICK WHEELER pat.wheeler@nottingham.ac.uk
PROFESSOR OF POWER ELECTRONIC SYSTEMS

Dr RISHAD AHMED RISHAD.AHMED@NOTTINGHAM.AC.UK
ASSISTANT PROFESSOR

Abstract

Integration of the on-board charger (OBC) and auxiliary power module (APM) in electric vehicles (EVs) can reduce the overall weight, volume and cost of the on-board charging system, as well as increase efficiency. This paper proposes optimized modulation strategies for an integrated on-board charger (IOBC) based on triple-active-bridge (TAB) converter. The proposed multiport converter is capable of charging the high-voltage (HV) and low-voltage (LV) batteries simultaneously from the grid. In addition, the HV and LV batteries can also be charged individually from the grid without the need of additional mechanical switches or relays, due to the proposed 5-degrees-of-freedom (DOF) modulation scheme. Detailed loss analysis of TAB is presented for the first time, targeting a simple and accurate estimation of the converter losses. Furthermore, four optimization schemes are proposed aiming to improve the performance of the integrated charger, including reduction of the converter total loss and zero-voltage-switching (ZVS) turn-on for all converter devices. A constant-current/constant-voltage (CC/CV) charging scheme is considered for both HV and LV batteries and the results of the optimization schemes are evaluated using a 4.3kW experimental prototype, while the measured converter efficiency with the proposed optimization schemes reaches 96.1% at nominal power levels.

Citation

Kougioulis, I., Zanchetta, P., Wheeler, P., & Ahmed, M. R. (2024). On Optimized Modulation Strategies for Electric Vehicle Integrated On-board Chargers. IEEE Transactions on Industry Applications, https://doi.org/10.1109/TIA.2024.3463610

Journal Article Type	Article
Acceptance Date	Aug 1, 2024
Online Publication Date	Sep 18, 2024
Publication Date	Sep 18, 2024
Deposit Date	Nov 19, 2024
Publicly Available Date	Nov 19, 2024
Journal	IEEE Transactions on Industry Applications
Print ISSN	0093-9994
Electronic ISSN	1939-9367
Publisher	Institute of Electrical and Electronics Engineers
Peer Reviewed	Peer Reviewed
DOI	https://doi.org/10.1109/TIA.2024.3463610
Keywords	Batteries , Transformers , Modulation, Optimization , Windings , Load flow, Topology
Public URL	https://nottingham-repository.worktribe.com/output/40002547
Publisher URL	https://ieeexplore.ieee.org/document/10684079

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