27th April 2011 11:27 PM #1
Theory of power factor improvement by using phase advancer
Question on power factor improvement by using phase advancer.
Last edited by nishi; 27th April 2011 at 11:37 PM.
27th April 2011 11:36 PM #2
PHASE ADVANCER:phase advancers are used to improve the power factor of induction motors.The low power factor of an induction motor is due to the fact that its stator winding draws exciting current which lags behind the supply voltage by 90 degree.If the exciting ampere turns can be provided from some other A.C. source,then the stator winding will be relieved of exciting current and the power factor of the motor can be improved.This job is accomplished by the phase advancer which is simply an A.C exciter.The phase advancer is mounted on the shaft as the main motor and is connected in the rotor circuit of the motor. It provides exciting ampere turns to the rotor circuit at slip frequency.By providing more ampere turns than required,the induction motor can be made to operate on leading power factor like an over-excited synchronous motor.
Tags for this Thread
Feedback Buttons provided by Advanced Post Thanks / Like v3.3.0 Patch Level 2 (Lite) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
vBulletin Security provided by vBSecurity (Lite) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.