Artificial Neural Control of 3-Phase Induction Motor Slip Regulation Using SPWM Voltage Source Inverter


Variable-Voltage Variable-Frequency control represents the mostsuccessful used method in speed control of 3-phase induction motor, which isimplemented by using PWM techniques. This paper proposes modeling andsimulation of sinusoidal PWM voltage source inverter as a VVVF A.C drive. Thedynamic model, simulation of 3-phase induction motor, and open loop speedcontrol system is proposed too. The PI closed loop controller of rotor slipregulation is illustrated as a traditional speed control method, which gives stableoperation behavior of motor speed in the constant torque region with settling time=0.5 sec and maximum overshot =20%, but unstable operation in the fieldweakening regions with steady state error =15%. The Artificial Neural Network(ANN) is going to be the modern type of speed controller. This paper proposesNARMA-L2 (Nonlinear Autoregressive-Moving Average) neural network as animproved Artificial Neural Network technique, and trained as a close loop slipregulation controller, which gives an ideal performance with settling and rise time= 0.18 sec, maximum overshot and steady state error less than 1% in differentspeed range and constant air gap flux, including the field weakening regions.