A Novel Dual-Stator HTS Linear Vernier Generator for Direct Drive Marine Wave Energy Conversion

Marine wave energy is characterized by high power density and worldwide distribution, thus being an important renewable energy source. To better utilize the power, a novel dual-stator high-temperature-superconducting linear vernier generator (DS-HTS-LVG) is proposed in this paper. A special excitation winding arrangement with different pole pitches is presented in this paper to increase the thrust density and power factor. The configuration and operation principle of the presented machine are demonstrated. Some key parameters of the machine are optimized to achieve better electro-magnetic performance. Moreover, by using the finite-element method, the performance of the proposed DS-HTS-LVG is compared with a conventional DS-HTS-LVG. The results show that the proposed generator has ~36% higher power density and increases the power factor from 0.38 to 0.57, verifying the superiority of the proposed machine and the effectiveness of the novel winding arrangement.