Implementation of Close Loop Speed Control with VVVF Control and Slip Regulation on LIM

K. Aditya, A. Newwel

Abstract


Open loop VVVF control has the disadvantage of low output torque when working at low frequency and poor speed precision at different load conditions.Various performance-improving schemes have been proposed for the basic VVVF control by compensating slips occurring in the low frequency range and slips caused by changing loads. Numerous papers have been published on the close loop speed control of rotary induction motor. In this paper a close loop speed control with VVVF control and slip regulation has been implemented for LIM based conveyor belt test Rig which compensates the disadvantages of traditional Volts/Hz control. SIMULINK results are presented to validate the effectiveness of proposed scheme.


Keywords


Linear induction motor; close loop speed control; slip regulation; VVVF control

Full Text:

PDF

References


Z. Yu, D. Figoli, “AC induction motor control using constant V/Hz principle and space vector PWM technique with TMS320C240”, Digital Signal Processing Solutions, Texas Instruments, 1998, available at: http://www.ti.com/lit/an/spra284a/spra284a.pdf

B. K. Bose, Modern power electronics and AC drives, Pearson education Asia, 2002

E. R. Laithwaite, S. A. Nasar, “Linear-motion electrical machines”, Proceedings of the IEEE, Vol. 58, No. 4, pp. 531–542, 1970

G. V. Sadler, A. W. Davey, “Applications of linear induction motors in industry”, Proceedings of the Institution of Electrical Engineers, Vol. 118, No. 6, pp. 765-776, 1969

S. P. Muley, M. V. Aware, “Modeling and simulation of a scalar controlled induction motor using combined inverter machine interaction in state space” , 2009 Second International Conference on Information and Computing Science, pp. 3–6, United Kingdom, May 21-21, 2009

A.K. Rathore, S. N. Mahendra, “Decoupled control of attraction force and propulsion force in linear induction motor drive”, 2003 IEEE International Conference on Industrial Technology, Vol. 1, pp. 524–529, 2003

S. Velisetti, “Simulation and implementation of vvvf, cvvf and cfvv controls on LIM using dSpace”, M.Tech. Dissertation supervised by Prof. S. N. Mahendra, Department of Electrical Engineering, Banaras Hindu University, Varanasi, India, 2011




eISSN: 1792-8036     pISSN: 2241-4487