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Speed Control of Induction Motor Using New Sliding Mode Control Technique

ABSTRACT

Induction Motors have been used as the worker in the industry for a long time due to its easy build, high strength, and generally enough ability. However, they are simply more difficult to control than DC motors. One of the problems which might cause failed try for designing a proper controller would be the time varying nature of limit and variables which might be exchanged while working with the motion systems. One of the best planned solutions to solve this problem would be the use of Sliding Mode Control (SMC).

SMC

This paper now the design of a new controller for a vector control induction motor drive that employs an outer loop speed controller using SMC. Several tests were achieve to consider the work of the new controller method, and two other sliding mode controller method. From the comparative simulation results, one can conclude that the new controller law supply high work dynamic quality and is robust with regard to plant limit change.

KEYWORDS:

  1. Induction Motor
  2. Sliding Mode Control
  3. DC Motors
  4. PI Controller

SOFTWARE: MATLAB/SIMULINK

BLOCK DIAGRAM:

Induction motor drive system with sliding mode controller

Fig. 1 Induction motor drive system with sliding mode controller

EXPECTED SIMULATION RESULTS:

                           Rotor speed tracking performance (b)Rotor speed tracking error (c)Control effort Rotor speed tracking performance (b)Rotor speed tracking error (c)Control effort Rotor speed tracking performance (b)Rotor speed tracking error (c)Control effort

Fig.2 (a)Rotor speed tracking performance  (b)Rotor speed tracking error   (c)Control effort

image005 image006 image007

Fig.3 (a)Rotor speed tracking performance  (b)Rotor speed tracking error   (c)Control effort

image008 image009 image010

Fig.4 (a)Rotor speed tracking performance  (b)Rotor speed tracking error   (c)Control effort

CONCLUSION

In this paper, new method to reduced chattering for sliding mode control is agree to design the rotor speed control of induction motor. To verify the work of the new planned control law, we supply a series of simulations and a comparative study between the work of the new planned sliding mode controller method and those of the Pseudo and Saturation sliding mode controller method.

SLIDING MODE CONTROLLER

The sliding mode controller algorithms are capable of high precision rotor speed tracking. From the  approximate simulation results, one can conclude that the three sliding mode controller method display nearly the same dynamic behavior under nominal condition. Also, from the simulation results, it can be seen clearly that the control work of the new sliding mode controller method in the rotor speed tracking, robustness to limit difference is superior to that of the other sliding mode controller method.

REFERENCES

  1. Wade, M.W.Dunnigan, B.W.Williams, X.Yu, ‘Position control of a vector controlled induction machine using slotine’s sliding mode control’, IEE Proceeding Electronics Power Application, Vol. 145, No.3, pp.231-238, 1998.
  2. I.Utkin, ‘Sliding mode control design principles and applications to electric drives’, IEEE Transactions on Industrial Electronics, Vol.40, No.1, pp. 23-36, February 1993.
  3. K.Namdam, P.C.Sen, ‘Accessible states based sliding mode control of a variable speed drive system’, IEEE Transactions Industry Application, Vol.30, August 1995, pp.373-381.
  4. Krishnan, ‘Electric motor drives: modelling, analysis, and control’, Prentice-Hall, New-Jersey, 2001.
  5. J.Wai, K.H.Su, C.Y.Tu, ‘Implementation of adaptive enhanced fuzzy sliding mode control for indirect field oriented induction motor drive’, IEEE International Conference on Fuzzy Systems, pp.1440-1445, 2003.