Optimisation and comparison of integrated models of direct-drive linear machines for wave energy conversion
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Date
30/06/2014Author
Crozier, Richard Carson
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Abstract
Combined electrical and structural models of five types of permanent magnet linear
electrical machines suitable for direct-drive power take-off on wave energy applications
are presented. Electromagnetic models were developed using polynomial approximation
to finite element analysis results. The structural models are based on simple beam
theory, other classical techniques, and automated finite element analysis formulations.
The machine models have been integrated with a time-domain model of a wave energy
converter based on a heaving buoy. They have then been optimised using a genetic
algorithm approach, using a score based primarily on the amortised cost per unit of
energy production. The optimised designs have then been used for a comparison of the
economic performance of the generator types.