Document Type : Original Article
Authors
1 Electrical Engineering Department, Yazd University, Yazd, Iran.
2 Faculty of Engineering, Ardakan University, Ardakan, Iran.
Abstract
To address key challenges in the widespread adoption of electric vehicles, this article introduces a bidirectional, integrated on-board battery charger capable of flexibly drawing power from various AC sources, such as single-phase and three-phase grids, as well as renewable energy DC sources like photovoltaic (PV) energy systems. The charger is designed for vehicles with an open-end winding motor powered by a dual inverter, consisting of two three-phase traction inverters and two sets of batteries. The proposed design utilizes a bidirectional current source converter at the input stage and integrates the dual inverter and the motor windings' leakage inductance as part of the charger, reducing both size and cost. Operating bidirectionally, the charger supports various grid support strategies, offering controlled active and reactive power with low total harmonic distortion (THD) in the grid current. It can also be directly connected to PV panels or DC fast-charging stations. A zero-net-torque-generating, interleaved switching pattern is employed to control the dual inverter switches, minimizing current ripple throughout the system. This article provides a detailed explanation and analysis of the proposed integrated charger, with system feasibility and performance validated through simulations.
Keywords
- Integrated On-Board Charger
- Bidirectional Current Source Converter
- Dual Inverter Drive
- Open-End Winding Machine
- Renewable Energy Source
Main Subjects
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