Pre-lab questions:Q1- What is the power factor?Q2- Calculate the power factor for the figure 1, where C= 15 nF.IntroductionFigure 1 shows a simple motor model consisting of a series RL network (The given values arenot realistic).C+ViLR2.2mH1000Motor Model310Figure 1+VoD

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Answered: Pre-lab questions: Q1- What is the…

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.4P

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80.5% O A series motor runs at (800 r.p.m) when the voltage is (400 V) and the current is (25 A). The armature resistance is (0.4 Q) and the series field resistance is (0.2 Q). Determine the resistance to be connected in series to reduce the speed to (600 r.p.m) with same current 3.85 O 4.25 2.85 O A shunt generator is running at 1000 rpm. If flux is reduced by half, then what is
The following information is given for a 300kW, 600V, long shunt compound DC generat or, shunt field resistance is 75 ohms, armature resistance 0.01, brush resistance is 0.011 ohrms, series field resistance is 0.012 ohms and the divert or resistance of 0.036 ohms.When the machine is delivering full load; a. Draw the circuit diagrarn b. Calculate the voltage and C Power generated by the armat ure.
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Two gen. A and B operate in parallel. The station capacity of A is 50MW and that of B is 25MW. The full load speed regulation of station A is 3% and of B is 3.5%. Find the load sharing of 50MW between both the machine and the no load frequency is 50Hz. Don't use pen and copy.
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A250 V, dc. shunt mtor has an amature resistance of 0.5 chmand a field resistance of 250 dhm When driving a load of canstant tarque at 600 r.pm, the ammature current is 20 A If it is desired to raise the speed fram600 to 800 r.p.m, what resistance should be inserted in the shunt field circut? Assume that the magnetic circut is unsaturated
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Ashunt-wound DC motor with the field coils and rotor connected in parallel (Figure 1) operates from a 130 V DC power line. The resistance of the field windings, R, is 208n. The resistance of the rotor, R, is 4.90 2. When the motor is running, the rotor develops an emf E. The motor draws a current of 4.46 A from the line. Friction losses amount to 45.0 W Part C Compute the emf E. > View Available Hint(s) undo redo Tese keyboard shortcuts Help Submit Part D Compute the rate of development of thermal energy in the field windings. Express your answer in watts. > View Available Hint(s) Temglates Symbols undo redo Teset keyboard shortcuts Help Paindings Figure 1 of 1> Submit Part E Compute the rate Pin rotor of development of thermal energy in the rotor. Express your answer in watts. Re E. R, > View Available Hint(s) Templates Symbols undo redo feset keyboard shortcuts Help Pn,rotor = W
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A d.c. shunt machine generates 250-V on open circuit at 1000 r.p.m. Effective armature resistance is 0.5 ohm, field resistance is 250 ohm, input to machine running as a motor on no load is 4 A at 250 V. Calculate speed of machine as a motor taking 40 A at 250 V. Armature reaction weakens field by 4%
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