NDLI: Modular Battery Charger for Light Electric Vehicles

Content Provider	Directory of Open Access Journals (DOAJ)
Author	Andrei Blinov Ievgen Verbytskyi Denys Zinchenko Dmitri Vinnikov Ilya Galkin
Abstract	Rapid developments in energy storage and conversion technologies have led to the proliferation of low- and medium-power electric vehicles. Their regular operation typically requires an on-board battery charger that features small dimensions, high efficiency and power quality. This paper analyses an interleaved step-down single-ended primary-inductor converter (SEPIC) operating in the discontinuous conduction mode (DCM) for charging of battery-powered light electric vehicles such as an electric wheelchair. The required characteristics are achieved thanks to favourable arrangement of the inductors in the circuit: the input inductor is used for power factor correction (PFC) without additional elements, while the other inductor is used to provide galvanic isolation and required voltage conversion ratio. A modular interleaved structure of the converter helps to implement low-profile converter design with standard components, distribute the power losses and improve the performance. An optimal number of converter cells was estimated. The converter uses a simple control algorithm for constant current and constant voltage charging modes. To reduce the energy losses, synchronous rectification along with a common regenerative snubber circuit was implemented. The proposed charger concept was verified with a developed 230 VAC to 29.4 VDC experimental prototype that has proved its effectiveness.
e-ISSN	19961073
DOI	10.3390/en13040774
Journal	Energies
Issue Number	4
Volume Number	13
Language	English
Publisher	MDPI AG
Publisher Date	2020-02-01
Publisher Place	Switzerland
Access Restriction	Open
Subject Keyword	Technology Ac-dc Power Converters Power Factor Correction Single-ended Primary-inductor Converter (sepic) Interleaved Control Lithium-ion Batteries Battery Chargers Land Vehicles
Content Type	Text
Resource Type	Article

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