Publisher : The Korean Institute of Electrical Engineers
DOI : 10.5370/JEET.2016.11.3.609
Title & Authors
An Off-line Maximum Torque Control Strategy of Wound Rotor Synchronous Machine with Nonlinear Parameters Wang, Qi; Lee, Heon-Hyeong; Park, Hong-Joo; Kim, Sung-Il; Lee, Geun-Ho;
Belt-driven Starter Generator (BSG) differs from other mild hybrid systems as the crankshaft of vehicle are not run off. Motor permits a low-cost method of adding mild hybrid capabilities such as start-stop, power assist, and mild levels of regenerative braking. Wound rotor synchronous motor (WRSM) could be adopted in BSG system for HEV e-Assisted application instead of the interior permanent magnet synchronous motor (IPMSM). In practice, adequate torque is indispensable for starter assist system, and energy conversion should be taken into account for the HEV or EV as well. Particularly, flux weakening control is possible to realize by adjusting both direct axis components of current and field current in WRSM. Accordingly, this paper present an off-line current acquisition algorithm that can reasonably combine the stator and field current to acquire the maximum torque, meanwhile the energy conversion is taken into consideration by losses. Besides, on account of inductance influence by non-uniform air gap around rotor, nonlinear inductances and armature flux linkage against current variation are proposed to guarantee the results closer to reality. A computer-aided method for proposed algorithm are present and results are given in form of the Look-up table (LUT). The experiment shows the validity of algorithm.
BSG;Field current control;Flux weakening control;Maximum torque control;WRSM;
Ganesan R, Das S. K, Sinha B. K, "Analysis and control of EMI from single phase commutator motor used in house-hold mixer," IEEE. Madras EMI/C International Conference, pp. 423-427, Dec. 1997.
Geun-Ho Lee, Heon-Heyong Lee, Qi Wang "Development of Wound Rotor Synchronous Motor for Belt-Driven e-Assist System," Journal of Magnetics. vol. 18, pp. 487-493, Nov 2013.
Rossi. C, Casadei. D, Pilati. A, and Marano. M, "Wound Rotor Salient Pole Synchronous Machine Driver for Electric Traction," IEEE. Trans. Ind. Appl, vol. 3, pp. 1235-1241, October 2006.
Thomas. M.J, GERALD. B.K, and Thomas. W.N, "Interior Permanent-Magnet Sychronous Motors for Adjustable-Speed Drives," IEEE. Trans. Ind. Appl, vol. IA-22, pp. 738-747, July/August 1986.
Bon-Ho Bae, Seung-Ki Sul, "New Field Weakening Technique for High Saliency Interior Permanent Magnet Motor," In Conf. Rec. IEEE-IAS, vol. 2, pp. 898-905, October 2003.
Lonel, D.M, Popescum, M, McGilp, M.I, Miller, T.J.E, Dellinger, S.J, Heideman, R.J, "Computation of core losses in electrical machines using improved models for laminated steel," IEEE. Trans. Ind. Appl, vol. 43, pp. 1554-1564, Nov/Dec 2007.
Jacek F. Giera, Mitchell Wing, "Permanent Magnet Motor Technology, Design and Applications," 2nd ed. Marcel Dekker, Inc, 2000, pp. 555-556.
Shigeo Morimotor, Yoji Takeda, Takao Hirasa, "Current phase control methods for permanent magnet synchronous motors," IEEE. Trans. Power Electron., vol. 5, no. 2, pp. 133-139, April 1990.