This work presents a new wave energy converter power take off (PTO) system that combines two recent developments in drive train technology, the consequent pole linear vernier hybrid permanent magnet machine and the linear magnetic gear. The combined system is fully realised in three-dimensional finite element method and compared to a similar direct drive machine. While the resulting system is lighter, reducing the active material mass by 30%, and more efficient, the system requires larger amounts of high cost permanent magnet material and increased PTO complexity. It is summarised that while such a system could be recommended in certain conditions, it is not viable for general application.

References

1. 1)
  - 5. Baker, N.J., Mueller, M.A., Raihan, M.A.H.: ‘All electric drive train for wave energy power take off’. 5th IET Int. Conf. on Renewable Power Generation (RPG) 2016, London, UK, September 2016, pp. 1–6.
2. 2)
  - 3. McGilton, B., Mueller, P.M., Mcdonald, A.: ‘Review of magnetic gear technologies and their applications in marine energy’. Proceedings of the 5th IET Int. Conf. on Renewable Power Generation, London, UK, 2016.
3. 3)
  - 8. Mueller, M.A., Baker, N.J.: ‘Modelling the performance of the vernier hybrid machine’, IEE Proc. Electr. Power Appl., 2003, 150, (6), pp. 647–654.
4. 4)
  - 7. Almoraya, A.A., Baker, N.J., Smith, K.J., et al: ‘Development of a double-sided consequent pole linear vernier hybrid permanent magnet machine for wave energy converters’. 2017 IEEE Int. Electric Machines and Drives Conf. (IEMDC), Miami, FL, USA, May 2017, pp. 1–7.
5. 5)
  - 14. Jian, L., Chau, K.T., Gong, Y., et al: ‘Comparison of coaxial magnetic gears with different topologies’, IEEE Trans. Magn., 2009, 45, (10), pp. 4526–4529.
6. 6)
  - 15. Gerber, S., Wang, R.J.: ‘Analysis of the end-effects in magnetic gears and magnetically geared machines’. 2014 Int. Conf. on Electrical Machines (ICEM), Berlin, Germany, September 2014, pp. 396–402.
7. 7)
  - 11. Evans, D.J., Zhu, Z.Q.: ‘Influence of design parameters on magnetic gear's torque capability’. 2011 IEEE Int. Electric Machines and Drives Conf., IEMDC 2011, Niagara Falls, Canada, 2011, pp. 1403–1408.
8. 8)
  - 10. Kouhshahi, M.B., Bird, J.Z.: ‘Analysis of a magnetically geared lead screw’. IEEE Energy Conversion Congress and Exposition (ECCE), Milwaukee, WI, USA, 2016, pp. 1–5, doi: 10.1109/ECCE.2016.7854873.
9. 9)
  - 4. McMillan, D., Ault, G.W.: ‘Techno-economic comparison of operational aspects for direct drive and gearbox-driven wind turbines’, IEEE Trans. Energy Convers., 2010, 25, (1), pp. 191–198.
10. 10)
  - 13. McGilton, B., Crozier, R., Mueller, M.: ‘Magnetic gear design for an oscillating wave surge converter’. Proceedings of European Wave and Tidal Energy Conf., Cork, Ireland, 2017, (421), pp. 1–7.
11. 11)
  - 12. Atallah, K., Calverley, S., Howe, D.: ‘Design, analysis and realisation of a highperformance magnetic gear’, IEE Proc., Electr. Power Appl., 2004, 151, (2), pp. 135–143, doi: 10.1049/ip-epa:20040224.
12. 12)
  - 2. Daneshi-Far, Z., Capolino, G., Henao, H.: ‘Review of failures and condition monitoring in wind turbine generators’. The XIX Int. Conf. on Electrical Machines ICEM 2010, Rome, Italy, 2010, pp. 1–6.
13. 13)
  - 1. Counci, W.E.: ‘World energy resources, marine energy’, [Online]. Available at: http://www.google.co.uk/patents/US687292, 2016.
14. 14)
  - 6. Atallah, K., Howe, D.: ‘A novel high-performance magnetic gear’, IEEE Trans. Magn., 2001, 37, (4I), pp. 2844–2846.
15. 15)
  - 9. Holehouse, R.C., Atallah, K., Wang, J.: ‘Design and realization of a linear magnetic gear’, IEEE Trans. Magn., 2011, 47, (10), pp. 4171–4174.

Investigation into linear generators with integrated magnetic gear for wave energy power take off

References

Related content