can i have the methods of speed controls for 3 phase AC
MOTORS.
Answer Posted / sridhar nayak
speed control
speed of motor N-120f/p*(1-s)
so sppe can be control by changing following parameter i.e
f,slip, p-number of pole
| Is This Answer Correct ? | 11 Yes | 1 No |
Post New Answer View All Answers
What is evaporator & condencer & compressor
can any one tell me about the Extra low voltage systems?From where we give supply to these type of systems??
Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example?
why would the rotor rotate at sub synchronous speed against the direction of rotating flux when d rotor of 3 phase IM is connected to 3 phase balanced supply and the stator windings are shortcircuited ??
Why we use auxillary relay ? what is function of differential relay, directional o/c relay?
how to setting voltage RTCC panel
Define what is the function of anti-pumping in circuit breaker?
explain why core loss of a transformer is almost constant under different load conditions when connected across a constant voltage and constant frequency.
What should be the percentage increase in length of the dead end clamp for bus bar conductor (Hawthorn) after hydraulic pressing and what should be the applied pressure?
Why temperature rise is conducted in bus bars and isolators?
ANY ONE TELL ME ABOUT generator synchronization panel panel to synchronise 3 gen of 250kva both automatic and manual. 2 gen output vol 415 3ph, 1 gen output vol 400 3ph SEND THE DETAILS DIAGRAM ON THIS EMAIL ADDRESS ayazleo@hotmail.com as soon as possilble best ragrds electrical engineer ayaz mahmood SAUDI TECH
what is a power factor?
what is the generator rating for 40 amp load of 3phase motor.?? 400v voltage of generator... plz tell me with formula its urgent...plzzz... and also tell me that this 40 amp at all phases mean 40 amp on red,40 amp on yellow,40 amp on blue...... or the total sum of that 3phase is 40 amp....
What is magneto on a gas generator. how it functions. its out put is d.c or a.c. how it can be checked for correct functioning
Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.