Two dc shunt generator in parallel supply together 2000A. The machines have armature resistances of 0.04 ohm and 0.025 0hm field resistance of 25 ohms and 20 ohms. The induced emf’s of 440 V and 420 V respectively. Find the output of each machine

Two dc shunt generator in parallel supply together 2000A. The machines have armature resistances of 0.04 ohm and 0.025 0hm field resistance of 25 ohms and 20 ohms. The induced emf’s of 440 V and 420 V respectively. Find the output of each machine

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

See similar textbooks

Related questions

Q: he resistance of the copper field winding of a dc machine at 40 degree Celsius is 0.40 ohms. After…

A: GIVEN, R1=0.40ohm t1=40∘C α=0.00393 ( for cu field…

Q: The armature reaction of DC machines is less under no load condition. Select one: O True O False

A: Armature reaction is the effect of armature fluxon the main field flux. Armature flux is due to…

Q: A long shunt compound generator has an armature, series field and shunt field resistances of 0.040,…

Q: For a coil, each turn faces (2t4 – t³ – 2t) milliwebers of flux. The value of induced EMF in coil…

A: Given: A coil flux, φ=2t4-t3-2t mWb Total number of turns, N = 100 Time, t =2 sec

Q: 4. Determine the voltage regulation of a 2,000-V, 1-phase alternator giving a current of 100 A at…

Q: The armature and field resistances of a series machine are 0.2 ohm and 0.3 ohms respectively. While…

A: Machine is series wound machine Armature resistance Ra = 0.2Ω Field resistance Rf = 0.3Ω No load…

Q: purpose of brushes in a dc machine is__________. to change ac to dc signal to remove the losses in…

A: brushes in DC machine is placed between rorating commutator and external circuit. We will consider…

Q: The resistance of the field circuit of a d.c. shunt generator is 2002. When the output of the 100K…

A: The given question is related to a d.c. shunt generator with field circuit resistance given.…

Q: In a D.C machine, running at 450 rpm the hysteresis and eddy current losses are 300W and 150W…

Q: I need the complete solution.

A: Step 1: Solution(7) : **(i) Lap Fashion (Winding)**1. Determine the following formula for DC machine…

Q: The difference in salient- and non-salient pole machines is that salient pole machines have…

A: The question is about difference between salient and non-salient pole machine.

Q: Two shunt DC generators G1 and G2 are rated at 100 and 150 kW at 110 V respectively. Their external…

Q: In a 2 pole lap winding dc machine , the resistance of one conductor is 2Ω and total number of…

A: Given: A dc machine has, Total number of pole, P = 2. Resistance of one conductor, r = 2 Ω. Total…

Q: Discussion:- 1. What do you understand by "armature- reaction"? Discuss the effect of armature…

A: Solve the first question, unless the student has asked for a specific question to be solved, subject…

Q: Describe the Characteristics, characteristics, efficiency calculations, their applications Of DC…

Q: a) A sinewave is having a frequency of 50 Hz and instantaneous value of 250 Volts at 1.3 milli…

A: The solution to both the parts is attached below.

Q: (i) A chopper circuit drives an inductive load from 350 DC supply. Given the load resistance as 5 0,…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: A 220 V dc machine has an armature resistance of 1 ohm. If the full load current is 20 A, the…

A: Given information is shown below:

Q: A and B operate in parallel

A: When two shunt generators are connected in parallel means the operating voltage across both is…

Q: A 6-pole armature of a d.c. machine has 776 conductors and a flux per pole of 45 mWb. Determine the…

A: We know the direct formula generated emf .

Q: A synchronous generator with a synchronous reactance of 1.15 p.u. is connected to an infinite bus…

A: Given data, Xs=1.15 puV=1.0 VXe=0.15 puPmax.=1.2 pu

Q: A 1500rpm DC shunt generator is supplying 100 lamps of 60W at 230V, the armature and field…

Q: Two generators, each having no-load voltage of 500 V, are connected in parallel to a constant…

Q: A 4-pole dc machine is wound duplex lap. Find the number of parallel path

A: Answer: given that 4- pole DC machine poles (p) = 4 number of parallel paths denoted by A To…

Q: A short shunt compound DC generator supplies a load current of 10A at a voltage of 10 volts. If the…

A: Given: A short shunt compound DC generator in which IL=10AV=10VRa=0.001ΩRsh=1ΩRse=0.00Ω According to…

Q: In the load characteristics of a separately-excited DC generator, its output voltage decreases with…

A: The separately-excited DC generator the filed winding can be excited by an external source. This…

Q: A 1000rpm DC shunt generator is supplying 100 lamps of 60W at 230V, the armature and field…

A: Given data: N=1000 rpm 100 lamps, P=60W, V=230V Ra=0.2 ohm Rf=115 ohm

Q: a) A sinewave is having a frequency of 50 Hz and instantaneous value of 150 Volts at 1.2 milli…

Q: (i) A chopper circuit drives an inductive load from 350 DC supply. Given the load resistance as 5 Q,…

A: The duty cycle is nothing but the ratio of the ON period to the total time period.…

Q: .The self-induction of acoil undergoing commutation causes..........at the brushes. 4.The back…

A: 3. .The self-induction of a coil undergoing commutation causes produce reactance voltage at the…

Q: What is use of solenoid coil in the pressure to converter? a. To produce magnetic field in the LVDT…

A: LVDT stands for Linear Variable Differential Transformer. It is used to measure the linear…

Q: Turbine types generally can be classified into two main typesAnswer

A: Turbine classification:- Main two type turbines are?

Q: Two shunt generators are connected in parallel to supply a current of 1500A. Each machine has a…

Q: 2. The below figure shows the results of magnetic particles inspection experiment. What can you…

A: Introduction: Magnetic particle inspection is non-destructive testing to determine any discontinuity…

Q: Q4: A. 50-kVA ideal transformer has 800 turns on the primary and 60 turns on the secondary winding.…

A: Since you have posted multiple questions, we will provide the solution only to the first question as…

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

1.Two identical shunt generators running in parallel, each with armature resistance of 0.02 ohms and field resistance of 50 ohms. The combined load current is 5000A. The field are so excited that the generated voltages of one machine is 610V and the other is 600V. The terminal voltage of this parallel combination will be. www Ish1 Rh1 a.350-360 V b.450-460 V c. 550-560V Rat www az G₂ Raz 5000 A Ish2
dc machines
) A d.c. shunt machine while running as generator develops a voltage of 240 V at 1000 rp.m. on no-load It has armature resistance of 0.52 and field resistance of 250 92. When the machine runs as motor, input to it at no-load ts 4 A at 240 V. Calculate the speed and efficiency of the machine when it runs as a motor taking 40 A at 240 V. Armature reaction weakens the field by 6%
Q3/ A/ Compare between de series and shunt generator. Q3/ B/ Briefly explain the commutating process in dc machine.
A single phase full wave AC voltage controller has a resistive load of 5 ohms and an input voltage of Vs = 220 V (RMS), 50 Hz. The delay angles of both thyristors are set to 90 degrees. The maximum power that can be delivered to the load is: Select one: a. 5.65 kW b. 9.68 kW c. 11.52 kW d. None of these
A thicker wire is used in the DC series field winding than DC shunt field winding in DC machines. * O because it carries the load current. O to prevent mechanical vibrations. O to provide strength. O to produce large flux. The speed of a DC motor can be changed by varying - armature resistance circuit O flux per pole O voltage source O all of above
Two shunt generators A and B operate in parallel and their load characteristic s may be taken as straight lines. The voltage of A falls from 240 V at no - load to 220 V at 200 A, while that of B falls from 245 V at no - load to 220 V at 150 A. Determine the current which each machine supplies to a common load of 300 A and the bus - bar voltage at this load.
• A DC shunt machine while running as generator develops a voltage of 250 V at 1000 r.p.m. on no-load. It has armature resistance of 0.5 ohm and field resistance of 250 ohm. When the machine runs as motor, input to it at no-load is 4 A at 250 V. Calculate the speed and efficiency of the machine when it runs as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4 %
Two identical 2,000 kW alternator operates in parallel. The governor of the first machine is such that the frequency drops uniformly from 50 Hz at no-load to 48 Hz at full-load. The corresponding uniform speed drop of the second machine is 50 Hz to 47.5 Hz. What is the maximum load that can be delivered without overloading either machine?
Const.& Operation.
H4
The synchronous reactance of a cylindrical rotor machine is unity. The machine is connected to an infinite bus bar through an equivalent reactance of half of its synchronous reactance. For a maximum power output of 1.3 p.u. delivered at 1.02 p.u. voltage, find E. While the field is undisturbed, find the value of the current if the real power output is reduced to 0.65.p.u.