Unformatted text preview: 2. The developed power P dev . 3. The output power P out: 4. The motor e¢ ciency. 5. If the motor has a mechanical synchronous speed of 1200 rpm and a rated slip of 3%, &nd the developed torque T dev . Problem 3 A three-phase induction machine is connected in Y and has the following para-meters: R s = 0 : 12& R r = 0 : 2& L ls = L lr = 1 : 12 mH L m = 43 mH Find the following quantities: 1. For the supply voltage of 230V L & L 60Hz &nd starting torque, current and power. 2. Calculate the maximum torque and corresponding speed and e¢ ciency 3. At slip of 2% &nd current, power factor and e¢ ciency. 1...
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- Spring '08
- Electric motor, e¢ ciency, following parameters, three-phase induction machine, three-phase squirrel-cage induction