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Friday 14 November 2014

Speed Control of Separately Excited DC Motor

Speed Control of Separately Excited DC Motor

ABSTRACT:

This paper proposes the speed control of a separately excited dc motor varying armature voltage. The novelty of this paper lies in the application of nonlinear autoregressive-moving average L2 controller for the speed control of SEDM. This paper also discusses speed control of a SEDM using chopper circuit. The performance of the proposed system has been compared with the traditional one using conventional controllers. The entire system has been modeled using MATLAB 7.0 toolbox. It has been found that both PI and hysteresis current controllers could be eliminated by the use of NARMA-L2 controller.

KEYWORDS:

1.      Chopper Circuit
2.       NARMA-L2
3.       SEDM
4.       Speed control

SOFTWARE: MATLAB/SIMULINK

 BLOCK DIAGRAM:

 Fig. 1: Speed control circuit of a separately excited dc motor

 CONCLUSION:

Speed controller system based on NARMA-L2 controller has been successfully developed using
MATLAB to control the speed of a separately excited dc motor. The novelty of this paper lies in the application of NARMA–L2 controller to control of a separately excited dc motor. This paper also discusses modeling and control of SEDM using Sim Power Systems and simulink models. The performance of the system has been compared using different types of controllers. It has been found that NARMA-L2 controller is able to regulate the speed well above the rated values.

REFERENCES:

1. Zuo Z. Liu, Fang L. Luo, and Muhammad H. Rasid, “High performance nonlinear MIMO field weakening controller of a separately excited dc motor,” Electric Power Systems Research, vol. 55, issue 3, Sep. 2000, pp. 157-164.
2. Nabil A. Ahmed, “Modeling and simulation of acdc buck-boost converter fed dc motor with uniform PWM technique,” Electric Power Systems Research, vol.73, issue 3, Mar. 2005, pp. 363-372.
3. J. Figueroa, C. Brocart, J. Cros, and P. Viarouge, “Simplified simulation methods for polyphase brushless DC motors,” Mathematics and Computers in Simulation, vol. 63, issues 3-5, Nov. 2003, pp. 209-224.
4. J. Santana, J. L. Naredo, F. Sandoval, I. Grout, and O. J. Argueta, “Simulation and construction of a speed control for a DC series motor,” Mechatronics, vol. 12, issues 9-10, Nov.-Dec. 2002, pp. 1145-1156.

5. Charles I. Ume, John Ward, and Jay Amos, “Application of MC68HC11 microcontroller for speed control of a DC motor,” Journal of Microcomputer Applications, vol. 15, issue 4, Oct. 1992, pp. 375-385.