IEEE Electrification Magazine - June 2014 - 4

technology leaders

Electric and
Hybrid Vehicles
By John M. Miller

elcome to the second
issue of the second volume
of IEEE Electrification Magazine, the fourth issue since its inception
in 2013. this issue focuses on electric
and hybrid vehicles and complements
earlier volumes treating the progression of electrification, microgrids and
smart grid, and hot topics in electrification. It would be interesting to see
copies of IEEE Electrification Magazine in
dentists' and doctors' waiting rooms,
which may well happen faster than
one thinks, given the very rapid expansion of electrification that the public
now encounters in their everyday lives.
most apparent to the public at
large are the hybrid and electric vehicles now available from virtually every
manufacturer on the planet. however,
the increasing carbon dioxide (co2)
emissions from the transportation
sector and consequent impact on
climate change have resulted in
governmental policy aimed at an
overall reduction in petroleum consumption. According to the U.s. environmental Protection Agency report,
"light-duty Automotive technology,
carbon dioxide emissions, and Fuel
economy trends," published in
december 2013, only 5% of model year
2013 passenger vehicles are capable of
meeting 2025 co2 emissions goals,

W

Digital Object Identifier 10.1109/MELE.2014.2313403
Date of publication: 24 June 2014

4

I E E E E l e c t r i f i cati o n M agaz ine / j un e 2014

John M. Miller

and these are hybrid, plug-in hybrid,
and battery electric vehicles. In the
United states, we are at a point
where light-duty passenger cars and
trucks (<8,500 lb) have the goal of 29
mi/gal (8.1 l/100 km) on average, and,
by 2025, this is expected to increase
to 54.5 mi/gal (4.3 l/100 km) on average. It is therefore imperative that
action is taken now to develop the
electric traction drive technology and
energy storage systems to meet this
growing challenge. supporting vehicle electrification, especially as battery charging off the grid becomes
more pervasive, is the need for compact and efficient power electronics
for both onboard and off-board chargers, infrastructure, and connectivity
in the sense of vehicle-to-infrastructure communications.

the seven feature articles in this
issue have been selected to provide the
needed insights into the performance,
efficiency, and emissions requirements
necessary to meet the challenge of dramatic reductions in greenhouse gases.
three of the articles in this issue deal
with electric traction motors, detailing
the minimization of their loss-generating mechanisms, describing the optimization of their thermal-management system by more-effective heat
removal, and taking a look into the propulsion system of a battery electric car,
the Gm spark. It will become apparent
that an undercurrent driving the
advancement of electric drive vehicle
propulsion systems is the need for
them to be as fully integrated as possible. With high integration comes issues
associated with higher power densities
of components, such as elevated temperatures and the potential reduction
of reliability, unless more effective heatremoval mechanisms and materials
are included in the design.
two articles cover connectivity and
the economic analysis of electrified
vehicles and, in particular, how to
address the looming challenges over the
coming decades for an 80% reduction
in greenhouse gases and what constitutes the solution space to make this
happen. this again brings in connectivity of cars with the power grid and
renewable sources.
Another article discusses the common issues between more-electric



Table of Contents for the Digital Edition of IEEE Electrification Magazine - June 2014

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IEEE Electrification Magazine - June 2014 - Cover3
IEEE Electrification Magazine - June 2014 - Cover4
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