Abstract:
Energy storage is a crucial condition for both transportation purposes and for the use
of electricity. Flywheels can be used as actual energy storage but also as power
handling device. Their high power capacity compared to other means of storing
electric energy makes them very convenient for smoothing power transients. These
occur frequently in vehicles but also in the electric grid. In both these areas there is a
lot to gain by reducing the power transients and irregularities.
The research conducted at Uppsala university and described in this thesis is focused
on an all-electric propulsion system based on an electric flywheel with double stator
windings. The flywheel is inserted in between the main energy storage (assumed to be
a battery) and the traction motor in an electric vehicle. This system has been
evaluated by simulations in a Matlab model, comparing two otherwise identical
drivelines, one with and one without a flywheel.
