Electric Machinery and Power System Fundamentals
1st Edition
ISBN: 9780072291353
Author: Stephen J. Chapman, Stepehn J. Chapman
Publisher: McGraw-Hill Companies, The
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 3, Problem 3.3P
The first ac power system in the United States ran at a frequency of 133 Hz. If the ac power for this system were produced by a four-pole generator, how fast would the shaft of the generator have to rotate?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Answer the question briefly.
1. What is Alternating Current (AC)? Draw a simple graphical representation of AC.
2. What are the advantages of using alternating current over direct current?
1. A six-pole DC generator has an armature winding with 540 conductorsconnected in six parallel paths. Calculate the generated voltage in thismachine if each pole produces 1.56 x 106 maxwells and the armature speed is1,800 rpm.
What will be the frequency (in Hz) for 100kW, 230V, 12-Pole, alternator running at 12 rps?
Chapter 3 Solutions
Electric Machinery and Power System Fundamentals
Ch. 3 - What is the principal difference between a...Ch. 3 - Prob. 3.2QCh. 3 - Prob. 3.3QCh. 3 - What is the equation for the induced torque in an...Ch. 3 - The simple loop rotating in a uniform magnetic...Ch. 3 - Prob. 3.2PCh. 3 - The first ac power system in the United States ran...Ch. 3 - A three-phase, Y-connected, four-pole winding is...Ch. 3 - A three-phase, -connected, six-pole winding is...Ch. 3 - A three-phase, Y-connected, 60 Hz, two-pole...
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
- An alternator has 6 poles and runs at 1,000 rpm (a) what is its generated frequency? (b) What must be its speed if the frequency is to be 25 Hz?arrow_forwardA 220V series generator has an armature resistance of 0.4Ω. If the generated emf is 230V and the drop across the series field winding is 8V, what is the power (in watts) to the load? use two decimal places if the answer is not exact and do not include the unit anymore.arrow_forwardAn alternator has 6 poles. (a) At what speed must the machine be driven to develop 60 cycles? 25 cycles? (b) What frequency is developed if the speed is 1000rpm? Please give the complete solution for this problem. Thank you!arrow_forward
- A 4 pole, 50 Hz star connected alternator has 15 slots per pole and eachslot has 10 conductors. All the conductors of each phase are connected in series and the winding factor being 0.95. When running on no load for a certain flux per pole, the terminal e.m.f. was 1825 volt. If the windings are lap connected as in a D.C. machine, what would be the emf between the brushes for the same speed and the same flux/pole. Assume sinusoidal distributionarrow_forwardCalculate the speed and open-circuit line and phase voltages of a 4-pole, 3-phase, 50-Hz, star-connected alternator with 36 slots and 19 conductors per slot. The flux per pole is 0.019 Wb and is sinusoidally distributed.arrow_forwardA bipolar AC generator is running at 3,600 RPM . What will be the frequency of the voltage wave generated by the machine? a.40 CPS b.50 CPS c.60 CPS d.None of the abovearrow_forward
- A 6-Pole generator operates at 1,200 rpm. a) What frequency does it generate? b) At what speed must the generator to develop 25 cycles?arrow_forwarda 3phase,4-pole,24slots alternator has its armature oil shot pitch by one slot. its pitch factor will be? Subject: Electrical machine 2arrow_forwardGiven : alternator with maximum air-gap flux density of 7,400 gauss; pole pitch = 6.25 in ; axial length of armature = 10 inches ; flux distribution sinusoidal. Calculate the flux per pole.arrow_forward
- A four pole, 1200 rpm DC lap wound generator has 1520 conductors. If the flux per poles is 0.01 Wb. Find the generator emf ?arrow_forwardA 4-pole generator has a wave-wound armature with 722 conductors, and it delivers 100 amperes on full load. If the brush lead is 8°,calculate the armature demagnetizing and cross magnetizing ampere turns per pole. (Our Subject is Electrical Machine 1)arrow_forward) A four-pole synchronous generator is spinning at a mechanical speed of 1500 r/min. What is the electrical frequency generated by the machine?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Introductory Circuit Analysis (13th Edition)Electrical EngineeringISBN:9780133923605Author:Robert L. BoylestadPublisher:PEARSONDelmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage LearningProgrammable Logic ControllersElectrical EngineeringISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
- Fundamentals of Electric CircuitsElectrical EngineeringISBN:9780078028229Author:Charles K Alexander, Matthew SadikuPublisher:McGraw-Hill EducationElectric Circuits. (11th Edition)Electrical EngineeringISBN:9780134746968Author:James W. Nilsson, Susan RiedelPublisher:PEARSONEngineering ElectromagneticsElectrical EngineeringISBN:9780078028151Author:Hayt, William H. (william Hart), Jr, BUCK, John A.Publisher:Mcgraw-hill Education,
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:PEARSON
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
Programmable Logic Controllers
Electrical Engineering
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:9780078028229
Author:Charles K Alexander, Matthew Sadiku
Publisher:McGraw-Hill Education
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:9780134746968
Author:James W. Nilsson, Susan Riedel
Publisher:PEARSON
Engineering Electromagnetics
Electrical Engineering
ISBN:9780078028151
Author:Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:Mcgraw-hill Education,
02 - Sinusoidal AC Voltage Sources in Circuits, Part 1; Author: Math and Science;https://www.youtube.com/watch?v=8zMiIHVMfaw;License: Standard Youtube License