Abstract
The acquisition of inductive power transfer (IPT) technology in commercial electric vehicles (EVs) alleviates the inherent burdens of high cost, limited driving range, and long charging time. In EV wireless charging systems using IPT, power electronic converters play a vital role to reduce the size and cost, as well as to maximize the efficiency of the overall system. Over the past years, significant research studies have been conducted by researchers to improve the performance of power conversion systems including the power converter topologies and control schemes. This paper aims to provide an overview of the existing state-of-the-art of power converter topologies for IPT systems in EV charging applications. In this paper, the widely adopted power conversion topologies for IPT systems are selected and their performance is compared in terms of input power factor, input current distortion, current stress, voltage stress, power losses on the converter, and cost. The single-stage matrix converter based IPT systems advantageously adopt the sinusoidal ripple current (SRC) charging technique to remove the intermediate DC-link capacitors, which improves system efficiency, power density and reduces cost. Finally, technical considerations and future opportunities of power converters in EV wireless charging applications are discussed.
Highlights
The electrification of transportation has been considered as a promising solution to tackle greenhouse gas emissions and fossil fuel depletion
Technology is the most suitable for electric vehicles (EVs) charging applications where the power requirement is form few to several kW, and the air gap varies from a few centimeters to a few meters [5]
Researchers and engineers have fitted the outcomes of the inductive power transfer (IPT) to EV battery charging applications with various commercial products and standards [19]
Summary
The electrification of transportation has been considered as a promising solution to tackle greenhouse gas emissions and fossil fuel depletion. Wireless power transfer (WPT) enabling transferring energy from a source to a load without electrical contact has been extensively studied and successfully demonstrated using various techniques, namely, acoustic power transfer (APT) [11,12], radio frequency power transfer (RFPT) [13,14], optical power transfer (OPT) [15,16], capacitive power transfer (CPT) [17], and inductive power transfer (IPT) [18] It is well demonstrated from the literature that the IPT technology is the most suitable for EV charging applications where the power requirement is form few to several kW, and the air gap varies from a few centimeters to a few meters [5]. The IPT chargers offer with several benefits such as Energies 2020, 13, 2150; doi:10.3390/en13092150 www.mdpi.com/journal/energies
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