3. A 460 V, four pole, 50 hp, 60 Hz, Y connected, three phase induction motor develops its full-load induced torque at 3.8 percent slip when operating at 60 Hz and 460 V. The per phase circuit model impedances of the motor are
R_{1} = 0.33Omega
X_{mu} = 30Omega
X_{1} = 0.42Omega
X_{2} = 0.42Omega
Mechanical, core, and stray losses may be neglected in this problem.
(a) Find the value of the rotor resistance R_{2}
(b) Find tau max ,S max vartheta and the rotor speed at maximum torque for this motor.
(c) Find the starting torque of this motor.
(d) What code letter factor should be assigned to this motor?
