A 3phase 280 V 60 Hz 20 hp four pole induction motor has the
A 3phase 280 V. 60 Hz. 20 hp. four pole induction motor has the following equivalent circuit parameters R_1 =.012 ohm, R\'_2 = 0.1 ohm, X_1 = X\'_1 = 0.25 ohm, Xm = 10.0 ohm. Use the IEEE recommended equivalent circuit. The rotational loss is 400W. For 5% slip, Determine The motor speed in rpm and radians per sec 188.5 1800 1750 190
Solution
number of poles=4
frequency=60 hertz
slip speed Ns=(120f)/p=(120*60)/4=1800 rpm
