International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 03 Issue: 06 | June-2016 www.irjet.net p-ISSN: 2395-0072 © 2016, IRJET | Impact Factor value: 4.45 | ISO 9001:2008 Certified Journal | Page 1482 MODELLING OF INDUCTION MOTOR AND ITS PERFORMANCE WITH PI,PID(NZ METHOD),PI(ZP) , FUZZY AND GENERALISED PREDICTIVE CONTROL 1. S.NAVEEN, 2. N.PREMA KUMAR 1 PG Student,Dept.Electrical Engg,A.U. College of Engineering(A),Visakhapatnam,A.P,sadasivunin741@gmail.com. 2 Professor,Dept. Electrical Engg.A.U. College of Engineering(A),Visakhapatnam,A.P,prem_navuri@yahoo.co.in ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract —Induction motor is robust system which runs at their rated speed, however there are many applications where variable speed operations are required. Although range of speed control of induction motor control techniques are available, here a system of fuzzy logic controller and conventional PI controllers is made.The performance of the system is improved by using these controllers. The model includes the transfer function of an induction motor (with certain parameters taken), mathematically modelled PI,PID(zn),PI(pz) controller, fuzzy logic controller and Generalised predictive controller which were coded in MATLAB editor. Simulation was done using MATLAB Simulink software Key Words: Transfer function of Induction Motor; Fuzzy logic controller; PI controller, Generalised predictive controller, Pole zero placement method 1. INTRODUCTION In induction motor synchronous speed depends upon frequency and poles of machine. An induction motor always run at a speed less than synchronous speed because the rotating magnetic field produced in the stator will generate flux in the rotor which helps the rotor to rotate, but due to lagging of flux, current in the rotor with flux current in the stator, the rotor will never reach speed of rotating magnetic field speed,synchronous speed .Induction motors generally run at a rated speed so their control techniques are necessary for many industrial applications.[3] Theseare three phase machines where the speed of the stator revolving flux (  ݏ ) is given by  ݏ = 120   where fis the frequency in Hz and P is number of poles. The following figure shows the per-phase equivalent circuit of an induction motor regarding stator side. where, r1 = resistance of Stator X1 = Stator leakage reactance I1 = Stator current Rc = Shunt branch resistance Xm = Magnetizing reactance Ie = Per-phase no-load current I2 = Rotor current I2 ’ = Rotor Current per phase referred to stator X2 ’ =Standstill rotor reactance referred to stator r2 ’ = rotor resistance referred to stator V1 = Stator voltage E1 = Stator induced emf s = slip Figure 1:Per-phase equivalent circuit referred to Stator side[3] The electrical equation of machine is  = ܫ    + ܬ ݏ ܫ  + ܧ  ܧ  ∝   ݐ Electrical torque is given by   = ܧܭ 2   2 + 2 Mechanical torque is given by   = ܬӪ + ө