Publisher : The Korean Institute of Electrical Engineers
DOI : 10.5370/JEET.2015.10.1.243
Title & Authors
A Novel Skewed-Type Iron Slot Wedge for Permanent Magnet Synchronous Generators for Improving Output Power and Reducing Cogging Torque Kang, Sun-Il; Moon, Jae-Won; You, Yong-Min; Lee, Jin-Hee; Kwon, Byung-Il;
This paper proposes a novel skewed-type iron slot wedge that can improve both the cogging torque and the output power of a permanent magnet synchronous generator (PMSG). Generally the open slot structure is adopted in a PMSG due to its convenient winding work, but the high cogging torque is undesired. Firstly, an iron slot wedge was utilized to reduce the cogging torque of an open slot type PMSG. However, the output power of the machine decreased rapidly with this method. Thus, a proposed skewed type iron slot wedge is presented to improve the output power as well as the cogging torque as compared to the open slot type. Shape optimization of the skewed-type iron slot wedge is performed to simultaneously maximize the output power and reduce the cogging torque. The Kriging model based on the Halton sequence method and a genetic algorithm are used to optimize the design.
Finite element analysis;Optimal design;Permanent magnet synchronous generator;Slot wedge;
Jae-Hak Choi, et al., “Design of High Power Permanent Magnet Motor With Segment Rectangular Copper Wire and Closed Slot Opening on Electric Vehicles”, IEEE Trans. Magn., vol. 46, no. 6, June2010.
A. Kaga, et al., “The efficiency improvement of capacitor motor with Ferrite magnetic wedges,” IEEE Trans. Magn., vol. 22, no. 5, pp. 964-966, Mar. 1986.
G. Cvetkowski et al., “Performance Improvement of PM Synchronous Motor by Using Soft MagneticComposite Material”, IEEE Trans. Magn., vol. 44, no.11, pp. 3812-3815. Nov. 2008.
Jae-Won Moon, et al., “Design of Magnetic Slot Wedge Shape for Reducing Cogging Torque inPermanent Magnet Synchronous Generator of DirectDrive Type”, Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, vol. 26, no. 3, March 2012.
Touzhu Li, et al., “Reduction of Education of Cogging Torque in Permanent Magnet Motors”, IEEE Trans. Magn., vol. 24, no. 6, Nov. 1988
Mohammad S. Islam, et al., “Issues in Reducing the Cogging Torque of Mass-Produced Permanent-Magnet Brushless DC Motor”, IEEE Trans. Industry Apps., vol. 40, no. 3, May/June 2004.
Islam, R., et al., “Permanent-Magnet Synchronous Motor Magnet Designs With Skewing for Torque Ripple and Cogging Torque Reduction”, IEEE Trans. Industry Apps., pp. 516-522, June 2009.
J. R. Hendershot JR, et al., “Design of Brushless Permanent-Magnet Motors”, p. 4-25.
Giulio De Donato, Fabio Giulii Capponi and Federico Caricchi, “No-Load Performance of Axial Flux Permanent Magnet Machines Mounting Magnetic Wedges”, IEEE Trans. Industrial Electronics, Vol. 59, No. 10, Oct. 2012.
L. Lebensztajn, C. A. R. Marretto, M. C. Costa and J.L. Coulomb, “Kriging: A Useful Tool for Electromagnetic Device Optimization,” IEEE Trans.on Magn., Vol. 40, No. 2, pp. 1196-1199, Mar. 2004.
J. H. Halton, “On the efficiency of certain quasirandom sequences of points in evaluating multidimensional integrals,” Numer. Math., vol. 2, no. c, pp. 84-90, 1960.