5.15 A 36, 208 V, 60 Hz, 20 hp, four-pole induction motor has the following equivalent circuit para- meters. R1 = 0.12 2 R, = 0.1 2 X1 = X = 0.25 2 Xm = 10.0 2 The rotational loss is 400 W. For 5% slip, determine (a) The motor speed in rpm and radians per sec. (b) The motor current. (c) The stator cu-loss.

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5.15 A 36, 208 V, 60 Hz, 20 hp, four-pole induction motor has the following equivalent circuit para-
meters.
R1 = 0.12 2
R, = 0.1 2
X1 = X = 0.25 2
Xm = 10.0 2
The rotational loss is 400 W. For 5% slip, determine
(a) The motor speed in rpm and radians per sec.
(b) The motor current.
(c) The stator cu-loss.
(d) The air gap power.
(e) The rotor cu-loss.
(f) The shaft power.
(g) The developed torque and the shaft torque.
(h) The efficiency.
Use the IEEE-recommended equivalent circuit (Fig. 5.15).
Transcribed Image Text:5.15 A 36, 208 V, 60 Hz, 20 hp, four-pole induction motor has the following equivalent circuit para- meters. R1 = 0.12 2 R, = 0.1 2 X1 = X = 0.25 2 Xm = 10.0 2 The rotational loss is 400 W. For 5% slip, determine (a) The motor speed in rpm and radians per sec. (b) The motor current. (c) The stator cu-loss. (d) The air gap power. (e) The rotor cu-loss. (f) The shaft power. (g) The developed torque and the shaft torque. (h) The efficiency. Use the IEEE-recommended equivalent circuit (Fig. 5.15).
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