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[searley]

A 3 PHASE 2 POLE MOTOR WHEN CONNECTED TO A 110vlt 3 PHASE 5OHZ SUPPLY HAS A 4% SLIP.

CALCULATE THE ROTOR SPEED ?

50X60/1 = 3000

120 RPM

NR = 3000-120 = 2880RPM.

HOW DO YOU GET 120RPM OUT OF 3000 ?

 

[Andy™]

input RPM - (input rpm x 4/100)

3000- (3000 x 0.04) = 2880

just to make sure its right, 2880 + 120 = 3000