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Energies 2017, 10(7), 887; https://doi.org/10.3390/en10070887

A Vertical Flux-Switching Permanent Magnet Based Oscillating Wave Power Generator with Energy Storage

Power Electronics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong
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Received: 10 May 2017 / Revised: 8 June 2017 / Accepted: 26 June 2017 / Published: 30 June 2017
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

In this paper, an effective low-speed oscillating wave power generator and its energy storage system have been proposed. A vertical flux-switching permanent magnet (PM) machine is designed as the generator while supercapacitors and batteries are used to store the energy. First, the overall power generation system is established and principles of the machine are introduced. Second, three modes are proposed for the energy storage system and sliding mode control (SMC) is employed to regulate the voltage of the direct current (DC) bus, observe the mechanical input, and feedback the status of the storage system. Finally, experiments with load and sinusoidal mechanical inputs are carried out to validate the effectiveness and stability of power generation for wave energy. The results show that the proposed power generation system can be employed in low-speed environment around 1 m/s to absorb random wave power, achieving over 60% power efficiency. The power generation approach can be used to capture wave energy in the future. View Full-Text
Keywords: wave power; energy storage; super capacitor; vertical flux-switching machine; SMC wave power; energy storage; super capacitor; vertical flux-switching machine; SMC
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Zou, Y.; Cheng, K.W.E. A Vertical Flux-Switching Permanent Magnet Based Oscillating Wave Power Generator with Energy Storage. Energies 2017, 10, 887.

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