Analysis of Control Variables to Maximize Output Power for Switched Reluctance Generators in Single Pulse Mode Operation
Keywords:
Control variables, optimal phase current shape, switched reluctance generatorAbstract
This paper presents an analytical modeling method of optimal control variables to maximize the output power for switched reluctance generators (SRGs) in single pulse mode operation. A method to obtain the phase current equation used to determine the optimal control variables is proposed. The phase current equation is derived from the phase voltage equation in combination with the inductance model. The inductance model proposed in this paper is applied from the flux linkage function. The characteristics of the phase current and the energy conversion relations are analyzed to determine the optimal phase current shape. The analytical results indicate that the optimal shape can be generated when the SRG is controlled with the optimal control variables. The optimal shape is used for analysis based on the phase current equation to determine the optimal control variables. An 8/6 SRG experimental setup is used to validate the proposed method. The optimal control variables obtained from the proposed method are used to control the SRG. Based on the experimental results, the SRG can produce the maximum output power.
Downloads
References
B. Fahimi, A. Emadi, and R. B. Sepe, “A switched reluctance machine-based starter/alternator for more electric cars,” IEEE Trans. Energy Conversion, vol. 19, no. 1, pp. 116-124, Mar. 2004.
N. Schofield and S. Long, “Generator operation of a switched reluctance starter/generator at extended speeds,” IEEE Trans. Vehicular Technology, vol. 58, no. 1, pp. 48-56, Jan. 2009.
S. R. Macminn and W. D. Jones, “A very high speed switched-reluctance starter-generator for aircraft engine applications,” in Proc. Conf. Aerospace and Electronics, pp. 1758-1764, 1989.
C. A. Ferreira, S. R. Jones, W. S. Heglund, and W. D. Jones, “Detailed design of a 30-kW switched reluctance starter/generators system for a gas turbine engine application,” IEEE Trans. Industry Applications, vol. 31, no. 3, pp. 553-561, May 1995.
R. Cardenas, W. F. Ray, and G. M. Asher, “Switched reluctance generators for wind energy applications,” in Proc. Conf. Power Electronics Specialists, pp. 559-564, 1995.
M. Ziapour, E. Afjei, and M. Yousefi, “Optimum commutation angles for voltage regulation of a high speed switched reluctance generator,” in Proc. Conf. Power Electronics, Drive Systems and Technology, pp. 271-276, 2013.
P. Asadi and B. Fahimi, “Design and control characterization of switched reluctance generator for maximum output power,” in Proc. Conf. Applied Power Electronics, pp. 1639-1644, 2006.
P. Kerdtuad and S. Kittiratsatcha “Modeling of a switched reluctance generator using cubic spline coefficients on the phase flux linkage, inductance and torque equations,” Advances in Electrical and Computer Engineering, vol. 15, no. 1, pp. 41-48, 2015.
D. W. Choi, S. I. Byun, and Y. H. Cho, “A study on the maximum power control method of switched reluctance generator for wind turbine,” IEEE Trans. Magnetics, vol. 50, no. 1, article: 4003004, Jan. 2014.
H. Chen and Z. Shao, “Turn-on angle control for switched reluctance wind power generator system,” in Proc. Conf. Industrial Electronics Society, pp. 2367-2370, 2004.
S. Yilmaz and D. A. Torrey, “Closed loop control of excitation parameters for high speed switchedreluctance generators,” IEEE Trans. Power Electronics, vol. 19, no. 2, pp. 335-362, Mar. 2004.
I. Kioskeridis and C. Mademlis, “Optimal efficiency control of switched reluctance generators,” IEEE Trans. Power Electronics, vol. 21, no. 4, pp. 1062- 1072, July 2006.
S. Yu, F. Zhang, D. H. Lee, and J. W. Ahn, “High efficiency operation of a switched reluctance generator over a wide speed range,” Journal of Power Electronics, vol. 15, no. 1, pp. 123-130, 2015.
S. Wongguokoon and S. Kittiratsatcha, “Analysis of a switched-reluctance generator for maximum energy conversion,” in Proc. Conf. Sustainable Energy Technologies, pp. 125-129, 2008.
P. Thongprasri and S. Kittitratsatcha, “Optimal excitation angles of a switched reluctance generator for maximum output power,” Journal of Electrical Engineering and Technology, vol. 9, no. 5, pp. 1527-1536, 2014.
K. N. Srinivas and R. Arumugam, “Dynamic characterization of switched reluctance motor by computer-aided design and electromagnetic transient simulation,” IEEE Trans. Magnetics, vol. 39, no. 3, pp. 1806-1812, May 2003.
S. A. Hossain and I. Husain, “A geometry based simplified analytical model of switched reluctance machines for real-time controller implementation,” IEEE Trans. Power Electronics, vol. 18, no. 6, pp. 1384-1389, Nov. 2003.
C. Roux and M. M. Morcos, “On the use of a simplified model for switched reluctance motors,” IEEE Trans. Energy Conversion, vol. 17, no. 3, pp. 400-405, Sep. 2002.
H. P. Chi, R. L. Lin, and J. F. Chen, “Simplified flux-linkage model for switched-reluctance motors,” in Proc. Electric Power Applications, pp. 577-583, 2005.
M. Stiebler and K. Liu, “An analytical model of switched reluctance machines,” IEEE Trans. Energy Conversion, vol. 14, no. 4, pp. 1100-1107, Dec. 1999.
D. A. Torrey, “Switched reluctance generators and their control,” IEEE Trans. Industrial Electronics, vol. 49, no. 1, pp. 3-14, Feb. 2002.
P. N. Materu and R. Krishan, “Estimation of switched reluctance motor loses,” IEEE Trans. Industry Applications, vol. 28, no. 3, pp. 668-679, June 1992.
P. Rafajdus, V. Hrabovcova, and P. Hudak, “Investigation of losses and efficiency in switched reluctance motor,” in Proc. Conf. Power Electronics and Motion Control, pp. 296-301, 2006.
S. Yu, D. H. Lee, and J. W. Ahn, “Efficiency analysis of switched reluctance generator according to current shape under rated speed,” Journal of International Conference on Electrical Machines and Systems, vol. 2, no. 4, pp. 491-497, Nov. 2013.
R. L. Lin, J. F. Chen, and H. P. Chi, “Spice-based flux-linkage model for switched reluctance motors,” in Proc. Conf. Electric Power Applications, pp. 1468-1476, 2005.
M. Krishnamurthy, B. Fahimi, and C. S. Edrington, “On the measurement of mutual Inductance for a switched reluctance machine,” in Proc. Conf. Power Electronics Specialists, pp. 1-7, 2006.
H. K. Bae and R. Krishnan, “A novel approach to control of switched reluctance motors considering mutual inductance,” in Proc. Conf. Industrial Electronics Society, pp. 369-374, 2000.
