WaveDrive: a systems approach to optimising a linear generator for Trident Energy
Abstract
WaveDrive is a Wave Energy Scotland (WES) funded project to optimise the Trident Energy PowerPod linear generator into a generic power take-off for use in a broad range of wave energy converters. Trident Energy assembled a flexible, multi-disciplinary team by leveraging a number of external design and engineering partners, including 42 Technology who are leading the re-design of the generator. 42 Technology built on the existing Trident Energy design, addressing a number of challenges including design for manufacture and optimisation of the air gap between the magnet stack and coils to maximise performance per unit cost, and bearing redesign to improve reliability and minimise operating cost. The overall design was then fine-tuned with geometric optimisation. The WaveDrive project achieved all technical objectives including reduction of the air gap to 2 mm, performance improvement by >50%, reducing intervention rates to <1 per annum and a design life of 20 years. Success derived from the way Trident Energy outsourced work packages to a multi-functional team of flexible, external experts. The team is now working towards a further bid to WES to build and test the new generator design in an onshore test rig ahead of sea trials in late 2017.
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