Hi, im a little stuck on a past exam paper question, (see the attached file). When looking at the speed torque graph in my notes the maximum torque peak is alway at 0.2 slip and this starting torque is obviously at slip = 1 hence i substituted these values in but can't help feel like i am missing something else. I have hand a look at the equivalent circuit but meh... i can't see how he has derived the expression for torque
all i can get is 60Protor / 2*pi*Ns
which was derived from Pmechanical / rotor speed in rad/s
and Protor = current^2*(R2/s)
anyways, any help much appreciated, thanks, Lee.
all i can get is 60Protor / 2*pi*Ns
which was derived from Pmechanical / rotor speed in rad/s
and Protor = current^2*(R2/s)
anyways, any help much appreciated, thanks, Lee.