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A magnetic gear box for application with a contra-rotating tidal turbine

Shah, L. and Cruden, A.J. and Williams, B.W. (2008) A magnetic gear box for application with a contra-rotating tidal turbine. In: 7th International Conference on Power Electronics and Drive Systems, 2007. International Conference on Power Electronics and Drive Systems PEDS, 1-4 . IEEE, pp. 1182-1186. ISBN 978-1-4244-0645-6

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Abstract

This paper presents experimental results for the application of a magnetic gear (MG) box to a contra- rotating tidal turbine. The contra-rotating tidal turbine is a novel design comprising two sets of rotors placed axially: the upstream rotor rotates in a clockwise direction whilst the downstream rotor rotates in an anti-clockwise direction. The tidal turbine is a low speed mechanical system similar to a wind turbine, hence the use of a gearbox is considered to permit a standard 4 or 6 pole induction generator to be used. The magnetic gearbox magnetically combines the output of both contra-rotating shafts into a single high speed rotating shaft. A gear box has been designed using 3D Finite Element Analysis and experimentally tested.