Why is starter necessary for a three-phase induction motor?
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Answer Posted / girish.r
R2 is D.Proportional to (1-s) { s = (Ns-N)/Ns) } . Same as
a transformer, Sy current determines the primery current.
So at starting R2=0 as ( N=0 and s=1). So Sy current is
very high as much as 5 times than F.L current. Hence as per
Transformer action py current also is so high. By reducing
the applied voltage or introducing resistance in the rotor
ckt this ckt interference can be reduced . FOR WHICH WE
USE A STARTER.
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DEAR SIR/MADAM,CLEARLY EXPLAIN ABOUT CRAWLING AND COGGING EFFECTS IN INDUCTION MOTOR.
