B-State the steps to obtain zero power factor characteristic of synchronous generator?A-i-ii-iii-For synchronous machines :-Define with plot the V-curves of synchronous motor?State the equation of power developed by three phase salient pole synchronous generatorand draw the power angle characteristic for it?Discuss the hunting of synchronous motor?

B - Steps to Obtain Zero Power Factor Characteristic of Synchronous GeneratorTo obtain the zero…

Answered: B-State the steps to obtain zero power…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Explain the conditions for parallel operation of synchronous generators. A three phase, wye connected, synchronous generator is rated 150 MW, 0.85 lagging power factor, 12.6 kV, 60 Hz, and 1800 rpm. Each winding has an armature resistance of 0.05Q and a synchronous reactance of 0.6Q. Draw the phasor diagram with values, show torque angle and determine the induced voltage for the condition of rated load.
L-1). How would it be possible to reverse the direction of rotation of a 3-phase synchronous motor? a) reverse the polarity of the DC field excitation b) interchanging any two of the incoming supply lines c) interchanging all three of the supply lines d) none of the above L-2). The amortisseur winding of a 3-phase, synchronous motor is the.....a) squirrel-cage winding on the rotor used to start the motor b) wire wound winding on the rotor to be connected to the external DC supply by way of slip rings and brushes c) either "a" or "b" d) neither "a" nor "b" L-3). Is it ok to have the DC voltage supply connected to the rotor of a 3-phase synchronous motor while starting? a) yes b) no
What are the active components of three-phase Induction Motor? b) Derive an expression for the frequency in the rotor circuit of three-phase IM? c) Draw with details the approximate per phase equivalent circuit of three-phase IM? d) Why the iron loss in rotor of an induction motor is negligible?
Please solve this problem step by step and illustrate your answer properly. Write your answer in a piece of paper please. Box the final answer.
2.A 10-MVA 4.6-kV 60-Hz 6-pole three phase synchronous generator has armature resistance of 2 ohms and synchronous reactance of 6 ohms. It is operated at rated frequency to supply rated load at rated voltage at a power factor of 0.9 lagging. Assume mechanical losses are negligible. a.Determine the magnitude of the line-to-line excitation voltage. b.Determine the input power for the generator, in MW. (Please compute in W or kW before converting to MW)
A three-phase, 1 MVA, 2.3 kV, 60 Hz, star-connected, salient pole synchronous generator has the d- and q-axis synchronous reactances are 1.1 and 0.8 Q respectively. Its armature has a resistance of 0.15 §. The machine is operating at full load at a power factor of 0.8 lagging. Determine the excitation voltage Ę and draw the generator phasor diagram using actual values.
A 300 KW and 600 V Long shunt compound DC generator has shunt field resistance = 100 2 armature resistance = 0.05 Q series field resistance = 0.02 Q commutating field winding resistance = 0.015 N connected in series with armature winding and diverter resistance = 0.03 N connected in parallel with commutating field. When the generator is delivering half full load, calculate power generated by the armature.
3
1-transfer function of DC Series motors. 2-block diagram of DC Series motors.
With the aid of diagrams describe the basic topology of a wound field 3 phase synchronous generator and outline the relationship between the excitation voltage and rotor current. Q2 (a) (b) Outline with the aid of a suitable diagram the necessary power conversion stages required to interface a small permanent magnet (PM) generator to a stand alone DC system. A star connected 3 phase wound field synchronous generator with a synchronous reactance of 20 N is connected to a 6.6 kV (phase voltage) grid and supplies 1.5 MW at 0.95 lagging power factor at its terminals. Calculate the phase current and resultant voltage across the synchronous reactance (Vxs), and from a scaled phasor diagram graphically determine the required excitation voltage (Eph) and load angle (8). (c) The load is now increased to 3 MW with the Excitation Voltage kept constant. Using the phasor diagram drawn in part (c) graphically determine the resultant phase current, power factor and load angle. (d)
hele Ish 0.05 50 A To R 30 A
Single phase induction motor performance characteristics 6. Explain double revolving field theory.

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