Pregunta: A single phase induction machine with capacitor start and centrifugal switch of ½ HP, 110V, 60Hz, a pair of poles, rated power factor 80% and efficiency at that point of 80%. The nominal speed of this machine is 3348rpm. The motor has an auxiliary winding with the same resistance as the main one, but with half the number of turns. The starting capacitor is

A single phase induction machine with capacitor start and centrifugal switch of ½ HP, 110V, 60Hz, a pair of poles, rated power factor 80% and efficiency at that point of 80%. The nominal speed of this machine is 3348rpm. The motor has an auxiliary winding with the same resistance as the main one, but with half the number of turns. The starting capacitor is 150uF. For the purposes of this problem you can neglect the magnetization branch. Determine:
1. The equivalent circuit parameters of this machine
2. The current of the main winding, its power factor, speed and efficiency, when driving a pump that develops 300W, at 3600rpm.
3. The starting torque of this machine.
4. The machine currents in each coil during startup.