Page 197 - Solutions Manual to accompany Electric Machinery Fundamentals

(f) The output power will generally decrease: P     
OUT ind m
(g) The rotor copper losses (including the external resistor) will increase.
(h) The overall efficiency  will decrease.

6-28. A 460-V, 75 hp, four-pole, Y-connected induction motor has the following parameters
R = 0.058  R 2 = 0.037  X M = 9.24 
1
X = 0.320  X 2 = 0.386 
1
P F&W = 650 W P misc = 150 W P core = 600 kW
For a slip of 0.01, find

(a) The line current I L
(b) The stator power factor
(c) The rotor power factor

(d) The rotor frequency
(e) The stator copper losses P SCL

(f) The air-gap power P AG

(g) The power converted from electrical to mechanical form P conv

(h) The induced torque  ind

(i) The load torque  load

(j) The overall machine efficiency 
(k) The motor speed in revolutions per minute and radians per second
(l) Sketch the power flow diagram for this motor.

(m) What is the starting code letter for this motor?
191