Design optimization of a slotless PM brushless motor with spiral wound laminations for rim driven thrusters
Design optimization of a slotless PM brushless motor with spiral wound laminations for rim driven thrusters
This paper discusses the analysis and design of a very thin slotless PM brushless motor whose stator laminations are manufactured from a single strip of steel that is edge wound into a spiral (like a “Slinky”) and then fitted over the windings that are preformed on the outside surface of a non-conducting former. Analytical and finite element analysis (FEA) are used to determine the constrained optimum dimensions of a motor used to drive a rim driven thruster in which the motor rotor is fitted onto the rim of the propeller and the stator is encapsulated in the thin Kort nozzle of the thruster. The paper describes the fabrication of a demonstrator motor and presents
experimental results to validate the theoretical calculations. Experimental motor performance esults are also reported and compared with those of a slotted motor that fits within the same
active radial dimensions as the slotless motor. The slotless motor, which has longer active length
and endwindings, and thicker magnets than the slotted motor, was found to be less efficient and
more expensive (prototype cost) than the slotted machine.
Sharkh, S.M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
Lai, S.H.
9ee819cd-2ace-4c3f-bb76-78c135c048cb
September 2009
Sharkh, S.M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
Lai, S.H.
9ee819cd-2ace-4c3f-bb76-78c135c048cb
Sharkh, S.M. and Lai, S.H.
(2009)
Design optimization of a slotless PM brushless motor with spiral wound laminations for rim driven thrusters.
International Symposium on Electric Vehicles (ISEV), Beijing, China.
01 Sep 2009.
Record type:
Conference or Workshop Item
(Paper)
Abstract
This paper discusses the analysis and design of a very thin slotless PM brushless motor whose stator laminations are manufactured from a single strip of steel that is edge wound into a spiral (like a “Slinky”) and then fitted over the windings that are preformed on the outside surface of a non-conducting former. Analytical and finite element analysis (FEA) are used to determine the constrained optimum dimensions of a motor used to drive a rim driven thruster in which the motor rotor is fitted onto the rim of the propeller and the stator is encapsulated in the thin Kort nozzle of the thruster. The paper describes the fabrication of a demonstrator motor and presents
experimental results to validate the theoretical calculations. Experimental motor performance esults are also reported and compared with those of a slotted motor that fits within the same
active radial dimensions as the slotless motor. The slotless motor, which has longer active length
and endwindings, and thicker magnets than the slotted motor, was found to be less efficient and
more expensive (prototype cost) than the slotted machine.
Text
Sharkh_and_Lai_High_Technology_Letters_March_2010_-_pre-print.pdf
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Published date: September 2009
Venue - Dates:
International Symposium on Electric Vehicles (ISEV), Beijing, China, 2009-09-01 - 2009-09-01
Identifiers
Local EPrints ID: 73518
URI: http://eprints.soton.ac.uk/id/eprint/73518
PURE UUID: 5aafc637-862f-4a5c-aa1e-3ac5a90a3df0
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Date deposited: 18 Mar 2010
Last modified: 14 Mar 2024 02:38
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Contributors
Author:
S.H. Lai
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