Question

Please be clear in concept and handwriting. A 20HP, three-phase, Wye-connected synchronous motor is connected to...

Please be clear in concept and handwriting.

A 20HP, three-phase, Wye-connected synchronous motor is connected to a 277VAC, 60Hz
power supply. At rated conditions, the motor runs at 3600 rpm and presents a 0.85 lagging
power factor to the power supply. The per-phase armature reactance is 350m?. Armature
resistance is negligible, as are all other sources of power loss.
Considering rated conditions,


a. draw a single-phase equivalent circuit showing V?, Ea and IA, with values.
b. draw a phasor diagram showing Bnet, Br, Bs, IA, ? and ?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Please be clear in conceot and handwriting, thank you. A 20 kVA three-phase synchronous machine is...
Please be clear in conceot and handwriting, thank you. A 20 kVA three-phase synchronous machine is connected to a 480 V, 60 Hz electrical service. The per-phase armature reactance is 80%. Armature resistance is negligible, as are all other sources of power loss. Part A: Motor Configuration The machine is configured to run as a motor. Its rated mechanical power is 20 HP and it is 94% efficient. The motor provides rated output mechanical power. The excitation is set such...
A three-phase Wye-connected synchronous generator is rated 3600 rpm, 200kVA, 480V, 60 Hz. The generator’s armature...
A three-phase Wye-connected synchronous generator is rated 3600 rpm, 200kVA, 480V, 60 Hz. The generator’s armature winding resistance is RA = 0.03Ω and the synchronous reactance XS is 0.25Ω. The rotational losses are 6kW, the core losses are 4kW, and the stray losses are 1% of the output real power. The generator is delivering 200kVA power at 0.85 pf lagging at rated voltage. Taking the phase voltage at the output as a reference, answer the following questions. How many poles...
A three phase, 200 kW, 2300 V, 50 Hz star (wye) connected non-salient rotor synchronous motor...
A three phase, 200 kW, 2300 V, 50 Hz star (wye) connected non-salient rotor synchronous motor has a synchronous reactance of 11 Ohms per phase. When it draws 175 kW the power angle is 10 electrical degrees. Neglect the ohmic losses. a. Determine the excitation voltage per phase. b. Calculate the supply line current. c. Determine the supply power factor. d. Draw the phasor diagram. e. By what percentage should the field current be changed to minimize the line current.
A three-phase wye-connected (Y) synchronous generator is operating at Ea = 8.OLO° kV (lineneutral) and has...
A three-phase wye-connected (Y) synchronous generator is operating at Ea = 8.OLO° kV (lineneutral) and has synchronous reactance of X~ = 1.0 fl . The generator is connected to a threephase delta-wye connected step-down transformer that is constructed from three individual single-phase transformers. Each the single-phase transformers has rated power of 200 kVA has a turns ratio of 4:1 where the rated primary voltage of 8.0 kV and a rated secondary of 2.0 kV and a per-unit series reactance of...
(360) Volt, 60 Hz, 600 hp, 0.6 pf-leading, four-pole -connected synchronous motor has 0.9Ω synchronous reactance....
(360) Volt, 60 Hz, 600 hp, 0.6 pf-leading, four-pole -connected synchronous motor has 0.9Ω synchronous reactance. Friction; wind; core losses and armature resistance are neglected. a) If the motor is operating under magnitude of phase current (ia) (180) Ampere and power factor of 0.6 lagging, 1. Find the input power of motor in hp 2. Find the generated voltage, EA 3. Find the torque and the maximum inducible torque in current state. b) If EA is increased by 18% find,...
410 Volt, 60 Hz, 600 hp, 0.6 pf-leading, four-pole Triangle connected synchronous motor has 0.9Ω synchronous...
410 Volt, 60 Hz, 600 hp, 0.6 pf-leading, four-pole Triangle connected synchronous motor has 0.9Ω synchronous reactance. Friction; wind; core losses and armature resistance are neglected. a) If the motor is operating under magnitude of phase current (ia) 230 Ampere and power factor of 0.6 lagging, 1. Find the input power of motor in hp (10p) 2. Find the generated voltage, EA (10p) 3. Find the torque and the maximum inducible torque in current state. (10p) b) If EA is...
A 3- phase, 2 pole Y-connected synchronous machines has a line-line voltage of 6,000V in 60Hz...
A 3- phase, 2 pole Y-connected synchronous machines has a line-line voltage of 6,000V in 60Hz power line, has an armature reactance of 2ohms/ phase and negligible armature resistance. Compute the following A) In case of generating action if the line current is 385 A at a leading power factor of 0.8, the armature voltage per phase is 3464V, Compute the voltage per phase and power angle. B) Draw the phasor diagram. C) If the losses in the machine is...
A three phase Y connected synchronous motor has negligible armature resistance and a synchronous reactance of...
A three phase Y connected synchronous motor has negligible armature resistance and a synchronous reactance of 12 ohm/phase. The motor takes 12,000kW at a line voltage of 13,200V. If the line current is adjusted so that the excitation voltage is 9000V/phase: a. What is the torque angle? b. At what power factor is the motor operating? c. What is its armature current?
4) A three-phase synchronous motor of 4000 hp nominal, 13,200 V, 60 Hz, 2 poles, connected...
4) A three-phase synchronous motor of 4000 hp nominal, 13,200 V, 60 Hz, 2 poles, connected in star, operating at 0.84 of power factor in advance, has an efficiency of 96.5%. The synchronous reactance per phase is 49.33 Ω: • Draw the phasor diagram on the grid sheet • Determine the loading angle • Determine the load torque
A three-phase, 9,375 kVA, 13.8 kV, 4-pole, 60 Hz, Y-connected synchronous generator has a synchronous reactance,...
A three-phase, 9,375 kVA, 13.8 kV, 4-pole, 60 Hz, Y-connected synchronous generator has a synchronous reactance, Xs = 17.9, and is connected to an infinite bus at rated voltage. If the rotational and electrical losses are negligivle, what is Ia, Ef, delta, theta, Tdrive, Phasor diagram, and power flow diagram (label completely with numerical values for, A) the machine as a generator; the prime-throttle is opened and If is adjusted so that the machine delivers rated kVA, 0.8 pf lagging,...