What is the meaning of 'A synchronous motor floating on
line'?
Answers were Sorted based on User's Feedback
Answer / abysen
when a synchronous machine operates at no load,Ia=0,therefore Fa=0.Neglecting the leakage impedance,then Ff=Fr & Ef=Er=Vt.Under this condition the machine is neither in motoring nor in generating mode.This condition is called Floating on the line.
Fa=mmf due to arm current
Fr=air gap mmf,Ff=field mmf,Ef=excitation emf,Er =air gap emf.
Is This Answer Correct ? | 22 Yes | 2 No |
Answer / iamdon
The 3 phase synchronous machines(alternator as well as
motor) has a special capability of working on different
power factors(lagging,leading and unity) depending upon the
excitation of DC field as mentioned below.
Overexcited----Motor will take leading current
Underexcited---Motor will take lagging current
Normal excited-Motor will take unity pf current.
So, overexcited motor can be used for power factor
improvement in large industrial plants where many Induction
motors and like wise loads are running.Under this situation
motor is not driving any mechanical load.Such state of
working of synchtronous motor is termed as 'A synchronous
motor floating on line'.
Author:arbelectbit@yahoo.com
Is This Answer Correct ? | 22 Yes | 13 No |
What makes the difference between 50Hz supply and 60Hz supply which one is economical? What is the use of using increased frequency?
What does Magnetic Neutral Axis
2 Answers Eskom, Genus, Lanco,
IF TVM OF TRANSFORMER SHOWS POWER FACTOR ON 33 KV SIDE AS 0.97 LAGGING AND ON 132 KV SIDE IS 0.75 LEADING.IS THIS CORRECT.WHERE IS PROBLEM.
how can we calculate the cooper armed cable size if the protection load of main fuse is 80 ampere.
The 3 phase Delta connection RB=440V, BY=350V,.......* is Line to Line voltage RY= ? And Formula....?
why Square root 3 used for three phase?
what is the formula for converting KW into KWH ?
how many amps in 1KVA?
what are the colour's and their indications in bucholz relay?
what is the working of hydrent system.
How is Grounding or Earthing achieved in Planes and Automobiles?
what is power plant?