IEEE Power Electronics Magazine - June 2018 - 75

2018 Season
The team aims to achieve an average lap
speed of over 100 mi/h (160.93 km/h)
around the Isle of Man TT course, with a
top speed of 150 mi/h (241.40 km/h), and
to win the MotoE championship.
The powertrain is set to get an
overhaul with new lithium-ion 18650
cylindrical cells. The change of chemistry and form factor offer significantly improved energy density when
packed onto the motorcycle compared
to the previous technology. The cells
will be packaged into five bespoke
modules fitting within the center of
the motorcycle and on the sides
beneath the fairings. This will allow
for significant weight and complexity
savings in terms of wiring and significantly reduce the disassembly and
reassembly time for the motorcycle
during race weekends.
An inverter converts dc from the
batteries into ac to drive the motor.
Inverters often come with motor con-

trollers built-in, which allows the
user to program the response of the
motor to the user input: in this case,
the rider's throttle twist-grip. One of
the main constraints when designing
an electric motorcycle is the space
limitation (i.e., to improve performance, the team must safely pack as
many cells onto the motorcycle as
possible). The University of Bath
Alumni Fund allowed the team to buy
a new, smaller inverter that can fit
into the rear subframe, allowing for
more cells inside the main body of
the frame. However, the carbon rear
subframe required a significant redesign to allow the inverter and its connectors to fit in.

the Future
The future of the Bath Zero team is
focused on developing custom power
electronics, and a team of third-year
engineering students is currently
developing a new motor controller

with the aim of using it during the 2019
race season.

About the Authors
Elizabeth Maclennan (em469@
bath.ac.uk) is a student at the University of Bath, United Kingdom, studying
integrated mechanical and electrical
engineering. She has worked at Williams Grand Prix Engineering designing systems for electric vehicles in
both racing and passenger applications. She is currently the project manager of Team Bath Racing Electric.
Hannah Crewe (hc515@bath
.ac.uk) is a student at the University
of Bath, United Kingdom, studying
mechanical engineering. She has worked with the tornado flight trials team
and the business development and
bidding team at the Air and Space
Division of QinetiQ. She has been a
part of the Bath Zero team for two
years and is the project manager of
this year's team.

.

June 2018

z	IEEE PowEr ElEctronIcs MagazInE

75


http://magna-power.com

Table of Contents for the Digital Edition of IEEE Power Electronics Magazine - June 2018

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