IMPROVEMENT OF POWER FACTOR AND EFFICIENCY OF THREE PHASE INDUCTION MOTOR BY EXTINCTION ANGLE CONTROL
Yogeshree P Dhakate, Dr D.R. Tutakne, Snehal A Ingewar
Efficiency, Power Factor, Extinction angle, Three Phase Induction Motor.
In this paper an attempt is made to investigate the performance of power electronic semiconductor switch like IGBT by giving extinction pulses of three phase induction motor . the extinction pulses is generated through control circuit is attach to power circuit which consist IGBT and diode . in this project three power circuit are fed to induction motor one in each phase of induction motor drive is presented . simulation result are obtained for performance analysis of the drive under loading condition and are discussed in detail . In given drive three phase synchronized extinction angle control technique has been use for three phase induction motor with pump and blower loads. The semiconductor controlled switches such as IGBT or MOSFET are used for this control technique. Using this method the RMS value of the current drawn by the motor decreased by around 10to20 percent for the same power output. The reduction in stator current causes reduction in copper loss, improves the power factor and also the efficiency of motor is improved. The power factor with this scheme can be brought from lagging to leading range.