Three-port isolated converters play a pivotal role in the simultaneous charging of high voltage (HV) and low voltage (LV) batteries of electric vehicles (EVs). The leakage inductance of the high-frequency transformer significantly influences power transfer of these isolated converters by impacting duty-cycle and output voltage regulation. Higher leakage inductance values lead to increased power loss and less accurate voltage regulation. Moreover, improper leakage inductance values can hinder the soft-switching operation of these converters. Hence, accurate estimation of leakage inductances of the three-winding transformer is important for optimizing the design and performance of these converters. In this paper, the leakage inductances of a three-winding transformer with two distinct winding arrangements are investigated in the context of a novel 3.3 kW three-port integrated onboard charger (IOBC). Both the analytical method and 3-D Finite Element Method (FEM) are considered to evaluate the leakage inductances. By comparing the obtained results, the winding configuration with a lesser leakage inductance set is chosen for the hardware prototype of the three-winding transformer. Furthermore, a series of short-circuit tests is conducted on the experimental prototype. The comparison between experimental and simulation results reveals a maximum error of 3.6%, illustrating the accuracy in estimating leakage inductances for the three-winding transformer.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Investigation of Leakage Inductance in Three-Winding Transformer for Three-Port Integrated Onboard Chargers


    Contributors:


    Publication date :

    2024-06-19


    Size :

    2323135 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Integrated onboard chargers for plug-in electric vehicles

    KHALIGH ALIREZA / TANG YICHAO / SHI CHUAN | European Patent Office | 2020

    Free access

    Onboard chargers for electronic vehicles

    Bothe,M. / Friemann und Wolf,DE | Automotive engineering | 1993


    93EL045 Onboard Chargers for Electronic Vehicles

    Bothe, M. / ISATA / ENEA; Agency: Italy | British Library Conference Proceedings | 1993


    On-Line Identification Algorithm for Transformer Leakage Inductance

    Gao, J. / Wang, J. / Zhang, B. | British Library Online Contents | 2008