A synchronous machine has a synchronous reactance of 1 ohms per phase and an armature resistance of 0.5 ohms per phase. Eat = 270 LOV and V1 = 250 L+10° V (both are phase to ground), (a) The internal generated voltage is greater than the terminal voltage, is this machine a motor or a generator? Why? (b) Find the power factor of the machine for the given operating condition, is it leading or lagging? (c) How much power P is this machine consuming from or supplying to the electrical system?

A synchronous machine has a synchronous reactance of 1 ohms per phase and an armature resistance of 0.5 ohms per phase. Eat = 270 LOV and V1 = 250 L+10° V (both are phase to ground), (a) The internal generated voltage is greater than the terminal voltage, is this machine a motor or a generator? Why? (b) Find the power factor of the machine for the given operating condition, is it leading or lagging? (c) How much power P is this machine consuming from or supplying to the electrical system?

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...

See similar textbooks

Related questions

Q: A 10-pole DC generator has a simplex lap-wound armature containing 100 coils of 10 turns each. The…

Q: A 4 pole generator with wave wound armature has 52 slots each having 22 conductors. The flux per…

Q: A 4 pole generator with wave wound armature has 58 slots each having 24 conductors. The flux per…

A: Given :For wave connection, A= 2 No. of Pole, P= 4 Slots= 58, each having 24 conductors So, Z=…

Q: Draw a developed winding diagram for a dc machine with 4 poles,26 slots with 4 conductors per slot,…

A: A duplex lap, double-layer winding is characterized by two separate paths or circuits, which are…

Q: T-a. The direction of rotation of a single-phase split-phase motor can be change by........ a)…

A: According to guidelines we need to solve only the first question. According to the question, define…

Q: A three pole pair generator has a lap-wound armature with 40 slots with 20 conductors per slot. The…

A: In this problem we will solve for the speed in rpm when the machine is connected in lap winding.…

Q: A four-pole Shunt connected generator has a lap connected armature with 728 conductors. The flux per…

Q: ) the armature windings of a 12-pole DC machine are composed of 72 coils with 10 windings, and the…

Q: Example 3 A short-shunt compound generator delivers a load current of 30 A at 220 V. It has…

A: This question belongs to electrical machine . It is based on the concept of generated e.m.f. in a…

Q: Check all the correct statements on AC machines (induction and synchronous) below. O The current…

Q: na dc machine when the number of parallels paths is (a) and the number of poles is (p), chus for lap…

A: Given In lap winding DC machine Number of parallel paths = a Number of poles = p

Q: What are the decimal values of the following 8-bit binary fractions? (a) 0.01100001(b) 0.10001000.

A: Given the binary fraction a) 0.01100001 b) 0.10001000

Q: A 4 pole generator with wave wound armature has 50 slots each having 28 conductors. The flux per…

A: Consider the given data and below attached image.

Q: A 2 pole wave wound dc shunt generator runs at a speed of 750 rpm, has an armature and shunt field…

A: In the question following data is given P=2 A=2 N=750 rpm Z=880 Flux= 0.115 Ra=0.9 ohm Rsh=280 ohm…

Q: () A 440 V. 60 Hz, star connected, the four-pole synchronous generator has a synchronous reactance…

A: Note : We are authorized to answer three sub parts at a time, since you have not mentioned which…

Q: - Indicate whether the following statement are true or false * True False In a dc machine for the…

Q: A 4 pole generator with wave wound armature has 50 slots each having 28 conductors. The flux per…

Q: A 6 pole generator with wave wound armature has 54 slots each having 28 conductors. The flux per…

Q: Under load in DC machines, the armature current will cause: a. Compensating Windings O b. Increase…

A: The given problem is from DC Machine. The detailed explanation is given in the next step

Q: a) A 12 pole dc generator has a simple wave wound armature containing 3000 conductors. If the flux…

A: Since you have asked multiple questions in a single request, we will be answering only the 1st…

Q: A shunt DC generator has no load terminal voltage of 140V. Armature resistance is 1ohm and shunt…

Q: - Indicate whether the following statement are true or false

A: in the DC machine the emf can be calculated using the following equation E = ∅ZPN / 60 A

Q: 5. In a DC generator, the iron losses at 1000 rpm are 10 kW at a given field current. At a speed of…

Q: The number of parallel paths and the number of series conductors required for a given kW rating of…

A: In this question , we will write about the number of parallel paths in dc machine depends hoon which…

Q: Electric Machines2 What are the characteristics of the rotating magnetic field created by…

A: The rotating magnetic field created by the three-phase current in three-phase stator winding: When a…

Q: DEGREE: ELECTRICAL ENGINEERING SUBJECT/COURSE: AC MACHINES Answer the following questions (A,…

A: Alternator- Alternator is a form of machine which is used to convert mechanical energy into…

Q: R1 jX1 jX2 -> IM R, RC jXM E1 S

A: Induction motor working Principle When an ac supply is connected to a stator it creates a rotating…

Q: Load Characteristics for DC shunt and series generator is shown below. Explain why curves are like…

Q: A three-phase squirrel cage induction machine with rated frequency of f = 50 Hz has a rated slip Sn…

Q: Indicate whether the following - statement are true or false

A: in the dc machine the emf can be calculated using the following equation E = ∅ZPN60 A

Q: A 6 pole generator with wave wound armature has 56 slots each having 20 conductors. The flux per…

Q: A 4 pole generator with wave wound armature has 50 slots each having 26 conductors. The flux per…

A: Given : A 4 pole generator Total number of conductors, Z = 50×26 = 1300 To find the speed of…

Q: ) A 440 V, 60 Hz. star connected, the four-pole synchronous generator has a synchronous reactance of…

A: Given machine is synchronous generator. Number of poles, P=4. Frequency of supply, f=60 Hz.…

Q: Q#3: In the 3-phase synchronous machine we deal with the two power supplies AC and DC. AC supply is…

Q: ns lespons Quèstion 7 If charge is placed at minus infinity, its potential is infinite None of these

A: To find potential : Given charge is place at infinity

Q: When the DC machine is running under saturation condition, then flux per pole decreases due to…

A: Ans. True

Q: (a) A 2 pole generator with wave wound armature has 75 slots each having 10 conductors. The flux per…

A: In this question , we will find speed in question 1 with given data when generator wave wound...In…

Concept explainers

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.

Question

A synchronous machine has a synchronous reactance of 1 ohms per phase and an armature
resistance of 0.5 ohms per phase. Eat = 270 LOV and V1 = 250 L+10° V (both are phase to ground),
(a) The internal generated voltage is greater than the terminal voltage, is this machine a motor or a
generator? Why?
(b) Find the power factor of the machine for the given operating condition, is it leading or lagging?
(c) How much power P is this machine consuming from or supplying to the electrical system?
(d) How much reactive power Q is this machine consuming from or supplying to the electrical system?
(e) With the same amount of mechanical load, how should the field current be adjusted to change the
direction of reactive power flow in the machine? (find Ir2/lı, |Q| is equal for (d) and (e))

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step 5

Trending now

This is a popular solution!

Step by step

Solved in 5 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

A 6 pole generator with wave wound armature has 58 slots each having 24 conductors. The flux per pole is 0.01 Wb. (i) At what speed must the armature rotate to give an induced EMF of 235V is? (ii) What will be the voltage developed, if the winding is lap connected and the armature rotates at the same speed is?
solve D and E.
Q8) A two-pole de generator has an armature containing a total of 40 conductors connected in two parallel paths. The flux per pole is 0.02 web, and the speed of the prime mover is 30 rpm. The resistance of each conductor is 0.01 ohm, and the current-carrying capacity of each conductor is 10 A. Calculate: (a) The average generated voltage per path and the generated armature voltage (b) The armature current delivered to an external load (c) The armature resistance (d) The terminal voltage of the generator.
Solve it fast fast fast plz
A 4 pole generator with wave wound armature has 54 slots each having 28 conductors. The flux per pole is 0.01 Wb. () At what speed must the armature rotate to give an induced EMF of 220V is, (i) What will be the voltage developed, if the winding is lap connected and the armature rotates at the same speed is,
(a) A 6 pole generator with lap wound armature has 135 slots each having 14 conductors. The flux per pole is 20 mWb. At what speed must the armature rotate to give an induced EMF of 210V. (b) What will be the voltage developed, if the winding is wave connected and the armature rotates at the same speed
A six-pole dc machine has an armature connected as a lap winding. The armature has 32 slots with six conductors per slot. The armature is rotated at 600 rpm, and the flux per pole is 30 mWb. Calculate the induced voltage. 1
A 2300V, 1000 kVA, 0.8 lagging power factor, two-pole, 60HZ, Wye-connected, synchronous generator has a synchronous reactance of 1.1 ohms and an armature resistance of 0.15 ohms. Its losses due to friction and friction with the air are 24 kW and its core losses are 18 kW. The field circuit has a dc voltage of 200v and a maximum of 10A. The field circuit current is adjustable in the range of 20 to 200 ohms.The magnetization curve of this generator is shown in the figure below.a) How much field current is required for Vt to equal 2300V when the generator is running without load?b) What is the voltage generated intermittently by this machine at nominal conditions?c) How much field current is needed to make the voltage at the terminals Vt=2300V when the generator works in nominal conditions?d) How much power and torque should the prime mover of the generator be able to supply?
State two reasons why a self-excited shunt dc generator may fail to build up a voltage. In each (both) case, briefly explain what can be done to correct the problem. Reason #1 Solution #1 Reason #2 Solution #2
A 4 pole generator with wave wound armature has 56 slots each having 28 conductors. The flux per pole is 0.01 Wb. (i) At what speed must the armature rotate to give an induced EMF of 230V is, (ii) What will be the voltage developed, if the winding is lap connected and the armature rotates at the same speed is,