Geometry Optimization of Synchronous Machines Used on Ship Shaft Generator Systems

Abstract:

In this paper, the geometry optimization and analysis of two synchronous machines for ship shaft generator applications was carried out. The use of shaft generators in marine applications is a convenient and effective way to supply electric energy to the ship, operating in conjunction with conventional diesel generators. On a first step, state of the art topologies of shaft generator systems are identified and evaluated. In addition, potential improvements in shaft generator systems are proposed. On a second step, a low-speed, direct-driven Permanent Magnet Synchronous Generator (PMSG) for shaft generator applications is designed and optimized in terms of torque production as well as efficiency. The PMSG is compared with an equal power Salient-Pole generator driven by a step-up gear, which is a set-up commonly used in shaft generator systems. The machines are evaluated and optimized in terms of torque production, efficiency and electromotive forces (EMF) harmonic content in nominal operating conditions.

• Periodical: Materials Science Forum (Volume 792)
• Pages: 245-250
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.792.245
• Online since: August 2014
• Authors: Athanasios G. Sarigiannidis*, C. Patsios, A. Pittaras, A. Kladas
• Keywords: Fractional-Slot Concentrated Winding, Geometry Optimization, Permanent Magnet Synchronous Generator (PMSG), Power Quality, Salient Pole Synchronous Generator, Shaft Generator

References

[1] Z. Haznadar, S. Berberovic, Z. Stih and R. Jokic, Modeling of Ship's Shaft Generator, International Symposium on Power Electronics, Electrical Drives, Autom. and Motion, (2006).

DOI: 10.1109/speedam.2006.1649999

[2] MAN B&W Diesel A/S , Shaft Generators for the MC and ME Engines.

[3] P. E. Kakosimos, A. G. Sarigiannidis, M. E. Beniakar, A.G. Kladas, and C. Gerada, Induction Motors versus Permanent Magnet Actuators for Aerospace Applications, IEEE Trans. Ind. Electron., in Press, DOI 10. 1109/TIE. 2013. 2274425.

DOI: 10.1109/tie.2013.2274425

[4] M.E. Beniakar, A.G. Sarigiannidis, P.E. Kakosimos and A.G. Kladas, Multi-objective Evolutionary Optimization of a Surface Mounted PM Actuator with Fractional Slot Winding for Aerospace Applications, IEEE Trans. Magn., in Press, DOI 10. 1109/TMAG. 2013. 2285497.

DOI: 10.1109/tmag.2013.2285497

[5] Paloumpis G., Transient Analysis of a ship's Power Grid, Diploma Thesis, National Technical University of Athens, (2011).

[6] F. Meier, Permanent-Magnet Synchronous Machines with Non-Overlapping Concentrated Windings for Low-Speed Direct-Drive Applications, PHD thesis, KTH, division of Electrical Machines and Power Electronics, Stockholm, (2008).

DOI: 10.1049/cp:20080510

[7] Ayman M. EL-Refaie, Fractional- Slot Concentrated- Windings Synchronous Permanent Magnet Machines: Opportunities and Challenges, IEEE Transactions on Industrial Electronics, (2010).

DOI: 10.1109/tie.2009.2030211

[8] A. Sarigiannidis, C. Patsios, P. Kakosimos, A. Kladas, Control design and performance analysis of shaft generators in ship power systems", 1st International Marinelive Conference on "All Electric Ship, (2012).

DOI: 10.1109/esars.2015.7101529