Estimation of Leakage Inductance in High-frequency Three-Winding Transformers for Electric Vehicle On-board Chargers

Kougioulis, Ioannis; Vannini, Amedeo; Pal, Anirban; Wheeler, Patrick; Ahmed, Md Rishad

Abstract

This paper reviews several methods to estimate the equivalent circuit model parameters of high-frequency three-winding transformers, considering measurement accuracy and tolerance to measurement errors. First, several equivalent circuit models of the three-winding transformer are reviewed and different methods to estimate the model parameters are investigated. A sensitivity analysis is performed to evaluate the accuracy of each method and its tolerance to measurement errors. In addition, transformer designs with E-cores and U-cores are simulated in ANSYS and their leakage inductance parameters are estimated for various winding arrangements. A three-winding transformer for EV charger application is simulated and the impact of the transformer model on the converter operation is discussed. Finally, a three-winding transformer prototype is built and tested to compare the accuracy of each estimation method with respect to the 3-D FE simulations. The comparison shows that methods based on one-port impedance measurements yield the most accurate estimation results.

Citation

Kougioulis, I., Vannini, A., Pal, A., Wheeler, P., & Ahmed, M. R. (2023, September). Estimation of Leakage Inductance in High-frequency Three-Winding Transformers for Electric Vehicle On-board Chargers. Presented at 25th European Conference on Power Electronics and Applications: EPE’23 ECCE Europe, Aalborg, Denmark

• Presentation Conference Type: Edited Proceedings
• Conference Name: 25th European Conference on Power Electronics and Applications: EPE’23 ECCE Europe
• Start Date: Sep 4, 2023
• End Date: Sep 8, 2023
• Acceptance Date: Sep 4, 2023
• Online Publication Date: Oct 2, 2023
• Publication Date: Sep 4, 2023
• Deposit Date: Jun 14, 2024
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Pages: 1992-2002
• Book Title: 2023 25th European Conference on Power Electronics and Applications (EPE'23 ECCE Europe)
• ISBN: 979-8-3503-1678-0
• DOI: https://doi.org/10.23919/EPE23ECCEEurope58414.2023.10264329
• Public URL: https://nottingham-repository.worktribe.com/output/25954218
• Publisher URL: https://ieeexplore.ieee.org/document/10264329