ABSTRACT:
This paper
presents the speed control scheme of indirect vector controlled induction motor
(IM) drive. PWM controlling scheme is based on Voltage source inverter type space
vector pulse width modulation (SVPWM) and the Conventional-PI controller or
Fuzzy-PI controller is employed in closed loop speed control. Decoupling of the
stator current into torque and flux producing (d-q) current components model of
an induction motor is involved in the indirect vector control. The torque
component Iq current of an IM is developed by an intelligent based Fuzzy PI controller.
Based on settling time and dynamic response the performance of Fuzzy Logic Controller is
compared with that of the PI Controller to sudden load changes. It’s provides
better control of motor torque with high dynamic performance. The simulated
design is tested using various tool boxes in MATLAB. Simulation results of both
the controllers are presented for comparison.
KEYWORDS:
1. Indirect Vector Control (IVC)
2. Space Vector Pulse Width Modulation (SVPWM)
3. PI Controller
4. Fuzzy Logic Controller (FLC)
SOFTWARE:
MATLAB/SIMULINK
BLOCK DIAGRAM:
Fig.1
Block diagram of a proposed scheme
EXPECTED SIMULATION RESULTS:
Fig.2
Starting response
Fig.3
Step response
Fig.4
Speed response for with and without load impact
Fig.5
Torque response for with and without load impact
CONCLUSION:
In this paper the concept of fuzzy logic
has been presented and the SVM based indirect vector controlled induction motor
drive is simulated using both PI and Fuzzy PI controller. The results of both controllers
under the dynamics conditions are compared and analyzed. The simulation result
support that the FLC settles quickly and has better performance than when PI
controller.
REFERENCES:
[1] Bimal K.Bose, “Modern Power
Electronics and AC Drives”, Pearson education.
[2] Leonhand.W, ‘Control of Electrical
Drives’, Springer Verlag 1990.
[3] Yang Li Yinghong, Chen Yaai and Li
Zhengxi “A Novel Fuzzy Logic Controller for Indirect Vector Control Induction
Motor
[4] Drive” Proceeding of the 7th World
Congress on Intelligent and Automation Jun 25 – 27, 2008, Chongqing,China, pp.
24-28
[5] R.A. Gupta, Rajesh Kumar,
S.V.Bhangale “Indirect Vector Controlled Induction Motor Drive with Fuzzy Logic
based Intelligent Controller”, ICTES,UK,December 2007,pp.368-373.
