1- Explain V curve by using Phasor diagram.
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1- Explain V curve by using Phasor diagram.
2- How the regulating characteristics can be obtained from V curve?
3- Comment on the motor operation as a phase advancer (capacitor).
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Solved in 4 steps with 4 images
- If a dual-voltage split-phase motor is to be operated on high voltage, how are the run windings connected in relation to each other?1-The field current of d.c shunt generator is not affected by load current.(True or False) 2-By tapping field method, the speed of d.c series motor can be controlled below rated value (True or False)Make a wiring diagram for a 3-phase motor that has a forward/reverse function And explain how to read the diagram in the picture
- 7. If a 575-volt three-phase motor originally connected in 3-parallel △ is reconnected in 5-parallel Y, thenew voltage isA. 501 volts.B. 794 volts.C. 598 volts.D. 747 volts.Due to the advantages of synchronous motor, analyze the application of the synchronous motor for driving the load. (Draw the related diagram for the analyze)Look at the photo and answer the following questions it Is a 6 pole, non-salient pole design, 3 phase ac generator, 10 volts induced in each coil. 1. What is the total voltage induced in each of the three phase belts? 2. What is the line voltage between L1&L2? 3. What is the line voltage between L2&L3? 4. What is the line voltage between L1&L3?
- A 3-phase, 50 Hz,2000 kVA, 2300 volt alternator gives a short circuit current of 600 A for a certain field excitation. For the same excitation, the open circuit voltage was 900 volts. The resistance between pair of terminals was 0.12 ohm. B)If the generator is deltaconnected, -Determine the full load regulation at 0.80 lagging pf. -Determine the full load regulation at unity pfIn a 50kVA star connected 440 V, Three phase, 60Hz alternator, the effective armature resistance is 0.25 ohm per phase, what is the percentage regulation on full load?A DC series generator is supplying a current of 10 A to a series lighting system through a feeder of total resistance of 2 Ω. The terminal voltage is 2500 V. The armature and series field resistances are respectively 20 and 10 Ω, respectively. A 15-Ω diverter resistance is shunted across the series field. Determine the power developed in the armature of the generator.
- 1. How do you determine if the 3 phase motor is delta connected having a a) 3 leads out b) 6 leads out 2. What is the purpose of connecting the 3 phase motor as wye during start up operation before reconnecting it to operate as delta in running operation?A DC series generator is supplying a current of 5A to a series lighting system through a feeder ofto total resistance, 1.0 ohm. The terminal voltage is 2500 V. The armature and series fieldresistances are respectively 18 and 15 ohms respectively. A 30-ohm diverter resistance isshunted across the series field. Determine the power developed in the armature of thegenerator?The AC motor M of figure shown in the next slide has 2300 Volts, balanced three-phase voltage impressed at its terminals and takes 120 kVA at 0.6 leading power factor. Calculate the line current, total power, and total power factor using Vmotor as the reference vector.