TY - GEN
T1 - Outer-rotor ac homopolar motors for flywheel energy storage
AU - Severson, E.
AU - Nilssen, R.
AU - Undeland, T.
AU - Mohan, N.
PY - 2014
Y1 - 2014
N2 - Flywheel energy storage technology has been successfully commercialized for applications requiring high power, high cycle-life, and short storage intervals. High idling losses have prevented the use of flywheel technology in applications that require longer storage intervals, such as grid-based, load-following energy storage. This paper proposes the use of an outer-rotor ac homopolar motor to significantly decrease idling losses, increase energy density, and decrease cost. Motor sizing equations, a comparison to the typically-used permanent magnet motor, and 3D finite element analysis of an example design are presented. It is shown that for high-performance flywheel designs, the ac homopolar motor can have a torque density comparable to that of a permanent magnet motor.
AB - Flywheel energy storage technology has been successfully commercialized for applications requiring high power, high cycle-life, and short storage intervals. High idling losses have prevented the use of flywheel technology in applications that require longer storage intervals, such as grid-based, load-following energy storage. This paper proposes the use of an outer-rotor ac homopolar motor to significantly decrease idling losses, increase energy density, and decrease cost. Motor sizing equations, a comparison to the typically-used permanent magnet motor, and 3D finite element analysis of an example design are presented. It is shown that for high-performance flywheel designs, the ac homopolar motor can have a torque density comparable to that of a permanent magnet motor.
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M3 - Conference contribution
AN - SCOPUS:84901835538
SN - 9781849198158
VL - 2014
T3 - 7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014
BT - 7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014
PB - Institution of Engineering and Technology
T2 - 7th IET International Conference on Power Electronics, Machines and Drives, PEMD 2014
Y2 - 8 April 2014 through 10 April 2014
ER -