5.18 A 3φ, 208 V, 60 Hz, six-pole induction motor has the following equivalent circuit parameters: R1 = 0.075 Ω, R2 = 0.11 Ω, L1 = L2 = 0.25 mH, Lm = 15.0 mH. The motor drives a fan. The torque required for the fan varies as the square of the speed and is given by Tfan = 12.7 × 10^(-3)ω^2 m. Determine the speed, torque, and power of the fan when the motor is connected to a 3φ, 208 V, 60 Hz supply. Use the approximate equivalent circuit of Fig. 5.14b and neglect rotational losses. For operation at low slip, the motor torque can be considered proportional to slip.