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).
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.
- Induction Motor
- Sliding Mode Control
- DC Motors
- PI Controller
Fig. 1 Induction motor drive system with sliding mode controller
EXPECTED SIMULATION RESULTS:
Fig.2 (a)Rotor speed tracking performance (b)Rotor speed tracking error (c)Control effort
Fig.3 (a)Rotor speed tracking performance (b)Rotor speed tracking error (c)Control effort
Fig.4 (a)Rotor speed tracking performance (b)Rotor speed tracking error (c)Control effort
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.
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