ENERGETICAL PERFORMANCES OF SINUSOIDAL PWM STRATEGY FOR THE INDUCTION MOTOR AND VOLTAGE INVERTER SYSTEM: SIMULATION AND EXPERIMENTAL APPROACH
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2011, Vol 35, Issue 35
Abstract
The electric drive is a main component of industrial equipment designed for small or large complexity, because the achievement of finished goods implies the adjustable mechanical energy available at the output of the system. Because the static converters are needfull in such a system, the evolution of the converter’s command sub-systems was also needful, to improve their performance. The aim of this paper is the energetical analysis of the drive system and it had been performed on an experimental stand and on it’s equivalent SIMULINK model for different static operation points. It was considered feeding the asynchronous motor from an indirect voltage source static converter using the sinusoidal modulation as command strategy. Two cases had been taken into consideration: feeding the motor with the same RMS voltages and achieving the same mechanical shaft power. The global model of the drive system, created in MATLAB/SIMULINK environment, provides all the needed information in order to calculate the parameter values for comparing the energetic performances, and highlights the fact that the load torque and frequency have their influence on power quality indicators. The frequencies considered for the energetic analysis are 10Hz, 20H and 50Hz, and the load was adjusted up to the nominal value. The induction motor model implements the equations which considers the magnetic resistance and main field saturation with the variation of the static magnetizing inductance, depending on the magnetizing current. The following power quality indicators had been taken in to consideration: efficiency, power factor, electrical losses.
Authors and Affiliations
Mihaita LINCA, Ileana-Anamaria MITRAN
Keywords
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