IEEE Power Electronics Magazine - September 2016 - 22
Inductive Power
transfer for Electric
Vehicle charging
Technical challenges and tradeoffs
by Roman Bosshard and Johann W. Kolar
I
Novel Charging Concepts Promote EV Adoption
Novel concepts such as contactless battery charging by inductive power transfer
(IPT) [6]-[25] have the potential to further accelerate EV adoption. Unique advantages result from the contactless transmission via IPT of battery-charging energy
©ISTOCKPHOTO.COM/ONURDÖNGEL
ncreasing public awareness of the environmental impact of greenhouse gas emissions, together with the development of modern lithium-ion batteries, has triggered worldwide interest in electric mobility
[1]. Together with environmentally sustainable energy production using
renewable energy sources, electric vehicles (EVs) and plug-in hybrid
EVs have a smaller CO2 footprint compared to traditional vehicles that rely
exclusively on internal combustion engines. As an additional advantage, the
total cost of ownership over the lifetime of an EV is lower than that of a traditional vehicle, despite the higher initial purchase price [2]. Hence, vehicle
markets in the developed world have seen EV sales rapidly increasing over
the past years.
Nevertheless, further improvement is required to mitigate the technological barriers that currently hinder widespread EV adoption. The development of electrical energy storage systems with ever-higher energy and
power densities has already begun to address the limited electrical driving
range and long battery-charging time of today's EVs. Still, innovative solutions for battery charging will be required to increase acceptance of the
technology and accelerate the transition from traditional to electric mobility. To this end, the miniaturization of isolated conductive on-board EV
battery chargers with high power capability is an ongoing research topic:
the steady performance improvements are a result of ever-higher converter
switching frequencies using novel wide-bandgap power semiconductors
[3], soft-switching converter topologies [4], and improved modeling and
optimization strategies that allow for the fullest utilization of all system
components [5].
Digital Object Identifier 10.1109/MPEL.2016.2583839
Date of publication: 7 September 2016
22
IEEE PowEr ElEctronIcs MagazInE
z September 2016
2329-9207/16©2016IEEE
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