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Application of AFEC in Speed Regulation of Motor using PWM Switching

Author(s):

Sumit R. Patel , Merchant Engineering College, Basana, Gujarat, India

Keywords:

AFEC (Active Front End Converter), PWM (Pulse Width Modulation), MATLAB, Induction Motor, PI Controller, Frequency Modulation, Speed Regulation of AC Motor, IGBT, Diode, Inverter, DC Link, triggering signal, open loop control, closed loop control.

Abstract

The research work is carried with the aim of developing an efficient closed loop speed regulation of Motor using PWM switching. SPWM technique has been used for providing triggering pulse to the AFEC and Inverter both in which IGBT is used as switch. It is very accurate method as it is concern with the modulation of the amplitude and frequency. Frequency modulation provides regulated control for varying the speed of the motor while amplitude modulation provides variable amplitude of output voltage and current. By changing Modulation index (ma) amplitude of the output voltage and current can be controlled. PWM is one of the best methods for the controlling the output voltage especially SPWM because it make it possible to control frequency and magnitude both in Induction motor. It is also used for the reduction of the harmonics from the system. The controlling or regulating the motor includes turn ON – desired speed for operation – turn OFF. AFEC has advantage of drawing balanced supply even in the unbalance supply form Utility. Using Matlab simulink this operation will be shown with the details like THD analysis, output voltage, output current, triggering signals for switching. Total circuitry controlling will also be developed in the Matlab. Applications of AFEC will be developed in Matlab simulink and the required triggering signals from PWM generator. The use of AFEC will enhance the speed regulation method for Induction motor. The comparative results of open loop and closed loop will conclude as the use of AFEC will make the controlling method more reliable and effective as the closed loop feedback goes through PI controller.

Other Details

Paper ID: IJSRDV2I4307
Published in: Volume : 2, Issue : 4
Publication Date: 01/07/2014
Page(s): 501-509

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