how can we run the induction motor at 9000 rpm ,by keeping
frequency constant??

Answer Posted / nilkanth tailor

bY KEEPING FREQUENCY CONSTANT, THIER IS ONLY ONE WAY TO
INCREASE OR DECRASE THE SPEED...SUPPOSE WE HAVE f=50Hz and
N=9000...thean no pole equlas to P=120*f/N...but we got
answer is 0.66pole which is not possible...so i think we
have to incraese freq to get speed high...up to 9000...

Is This Answer Correct ?    5 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What are high pass filter and low pass filter? and What are the flowmeter ?

1504


HI SIR, AM PREPARING FOR RRB FOR SECTION ENGINEER POST. PLZ SEND ME THE PREVIOUS QUESTION PAPERS AND HELP ME. I HAVE NO ENOUGH TIME MY EXAM DATE IS 22ND JUNE.... MY EMAIL ID IS nalla.amarnath@gmail.com

1483


What is vacuum circuit breaker.define with cause and where be use it device?

721


Single phase and threephase power calculation

1648


can any tell me why slope 40% and 80% is calculated in differential protection?

1431






WHY THREE PHESE SYSTEM VOLTAGE APPLIED IN 440 VOLT

1913


What is true sine wave or pure sine wave inverter?? Is it sine wave or step wave?? If it is step wave, waves with how much step is considered as pure sine wave? Is it possible to produce pure sinewave using power electronics?

1368


What is the typical enclosure type used for Indoor switchgear / Outdoor switchgear Units? - In Onshore / offshore Units?

523


3phase cable calculation formula by motor load

1004


if the load is 80 amp for main fuse and 100 amp for breaker so how can we calculate the cable size (cooper ) .

1664


If mutual flux is 1.2wb & power factor is 0.8 lag , then what is the Useful flux of a transformer?

3955


What is maximum power transfer theorem?

638


how synchronous condenser is used in place of synchronous generator with out negotiating IEEE standards? Can i use 3 generators as synchronous generators and 2 generators as a synchronous condensers in an IEEE 14 bus system with out disturbing the standards?

1632


What is the de rating factor of cable? What is the importance of the de rating factor in cable select

1880


In cable sizing calculation (determining the max route length of cable) why we choose the shortest length between cable length of full load current Iflc & starting current Istart?

2768