Electronics Fundamentals: Circuits, Devices & Applications
8th Edition
ISBN: 9780135072950
Author: Thomas L. Floyd, David Buchla
Publisher: Prentice Hall
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 8, Problem 30P
A common frequency for alternators on aircraft is 400 Hz. How many poles does a 400 Hz alternator have if the speed of rotation is 3000 rpm?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The generated voltage per phase of an alternator is E0 while the speed of rotor rotation is 3000 rpm. On changing the rotor speed to 750 rpm, the generated emf phase will become
a.
0.25*E0
b.
0.5*E0
c.
0.75*E0
d.
E0
estion
The generated voltage per phase of an alternator is E0 while the speed of rotor rotation is 3000 rpm. On
changing the rotor speed to 750 rpm, the generated emf phase will become
O a. 0.25*EO
O b. 0.5*EO
O c. 0.75*EO
O d. EO
7. The voltage generated across one inductor of a 30 alternator is 6 volts. There are
120 slots and 4 turns in every coil. The coil pitch is short by 2 slots, number of
poles is 10 and frequency is 60 Hz. The armature winding correction factor of the
alternator is nearest to
a. 0.925
b. 0.987
c. 0.967
d. 0.957
Chapter 8 Solutions
Electronics Fundamentals: Circuits, Devices & Applications
Ch. 8 - The period of a 60 Hz sine wave is 16.7 ms.Ch. 8 - The rms and average value of a sine wave are the...Ch. 8 - Prob. 3TFQCh. 8 - The peak value of a sine wave is the same as its...Ch. 8 - The number of radians in 360 is 2 .Ch. 8 - In a three-phase electrical system, the phases are...Ch. 8 - The purpose of an exciter is to supply dc rotor...Ch. 8 - In an automotive alternator, the output current is...Ch. 8 - Prob. 9TFQCh. 8 - A synchronous motor can be used when constant...
Ch. 8 - Prob. 1STCh. 8 - During each cycle, a sine wave reaches a peak...Ch. 8 - A sine wave with a frequency of 12 kHz is changing...Ch. 8 - Prob. 4STCh. 8 - When a sine wave has a frequency of 60 Hz, in 10 s...Ch. 8 - Prob. 6STCh. 8 - Prob. 7STCh. 8 - The average value of a 10 V peak sine wave over...Ch. 8 - Prob. 9STCh. 8 - Prob. 10STCh. 8 - The instantaneous value of a 15 A peak sine wave...Ch. 8 - If the rms curren through a 10k resistor is 5 m A,...Ch. 8 - Prob. 13STCh. 8 - Prob. 14STCh. 8 - Prob. 15STCh. 8 - Prob. 16STCh. 8 - Prob. 17STCh. 8 - Prob. 1TSCCh. 8 - Prob. 2TSCCh. 8 - Prob. 3TSCCh. 8 - Prob. 4TSCCh. 8 - Prob. 5TSCCh. 8 - Calculate the frequency for each of the following...Ch. 8 - Calculate the period for each of the following...Ch. 8 - A sine wave goes through 5 cycles in 10s. What is...Ch. 8 - A sine wave has a frequency of 50 kHz. How many...Ch. 8 - How long does it take a 10 kHz sine wave to...Ch. 8 - A sine wave has a peak value of 12 V. Determine...Ch. 8 - A sinusoidal current has an rms value of 5 mA....Ch. 8 - For the sine wave in Figure 8-74, determine the...Ch. 8 - If each horizontal division in Figure 8-74 is 1...Ch. 8 - In Figure 8-74, what is the instantaneous voltage...Ch. 8 - Sine wave A has a positive-going zero crossing at...Ch. 8 - One sine wave has a positive peak at 75 and...Ch. 8 - Draw two since waves as follows: Sline wave A is...Ch. 8 - Convert the following angular values from degrees...Ch. 8 - Convert the following angular values from radians...Ch. 8 - A certain sine wave has a positive-going zero...Ch. 8 - For a particular 0 reference sinusoidal current,...Ch. 8 - For a 0 reference sinw wave with an rms value of...Ch. 8 - Sine wave A lags sine wave B by 30. Both have peak...Ch. 8 - Repeat Problem 19 for the case when sine wave A...Ch. 8 - A sinusoidal voltage is applied to the resistive...Ch. 8 - Find the half-cycle average values of the voltages...Ch. 8 - Determine th rms voltage across R3 in Figure 8-77.Ch. 8 - A sine wave with an rms value of 10.6 V is riding...Ch. 8 - How much dc voltage must be added to a 3 V rms...Ch. 8 - A 6 V peak sine wave is riding on a dc voltage of...Ch. 8 - The conductive wire loop on the rotor of a simple...Ch. 8 - Prob. 28PCh. 8 - At what speed of rotation must a four-pole...Ch. 8 - A common frequency for alternators on aircraft is...Ch. 8 - Prob. 31PCh. 8 - Explain how the field in a three-phase motor...Ch. 8 - From the graph in Figure 8-78, determine the...Ch. 8 - Determine the duty cycle for each pulse waveform...Ch. 8 - Find the average value of each positive-going...Ch. 8 - What is the frequency of each waveform in Figure...Ch. 8 - What is the frequency of each sawtooth waveform in...Ch. 8 - A square wave has a period of 40s. List the first...Ch. 8 - What is the fundamental frequency of the square...Ch. 8 - Determine the peak value and the period of the...Ch. 8 - Determine the rms value and the frequency of the...Ch. 8 - Determine the rms value and the frequency of the...Ch. 8 - Find the amplitude, pulse width, and duty cycle...Ch. 8 - A certain sine wave has a frequency of 2.2 kHz and...Ch. 8 - Figure 8-84 shows a sinusoidal voltage source in...Ch. 8 - A nonsinusoidal waveform called a stairstep is...Ch. 8 - Refer to the oscilloscope screen in Figure 8-86....Ch. 8 - Accurately draw on a grid representing the scope...Ch. 8 - Accurately draw on a grid representing the scope...Ch. 8 - Based on the instrument settings and an...Ch. 8 - Examine the circuit board and the oscilloscope...Ch. 8 - Prob. 52PCh. 8 - www. prenhall.com/floyd. 53. Open file P08-53 and...Ch. 8 - www. prenhall.com/floyd. 54. Open file P08-54 and...Ch. 8 - www. prenhall.com/floyd. 55. Open file P08-55 and...Ch. 8 - www. prenhall.com/floyd. 56. Open file P08-56 and...
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
- The rotor of a 4-pole ac generator is wound with a 200 turns coil. If the flux per pole is 5 mWb and the rotor runs at a speed of 1500 rpm, the rms value of the induced voltage for this AC generator is nearly?arrow_forwardThe maximum value of the sinusoidal voltage wave generated in one coil of an alternator is 12v. How many electrical degreesfrom the zero points in the cycle (increasing positively) will the voltage be al+8.5V and b)-8.5V An alternator has a poles a) At what speed must the machine be driven to develop 60 cycles? 25cycles? What frequency is developed if the speed is 1,000 rpm?arrow_forwardFind the rms value of the induced emf per phase of a 10 pole, three phase, 50 Hz alternator with 2 slots per pole per phase and 4 conductors per slot in two layers. The coil span is 150°. The flux per pole is 0.12 Wb (a) 994 (c) 1020 53. (b) 864 (d) 960arrow_forward
- In DC machines the number of parallel paths for a wave winding generator is Select one: O a. Three O b. Two OC. Half the number of poles O d. Equal to Number of Polesarrow_forwardThe frequency of an ac generator is when running at 600 rpm is 50 Hz. What is the number of poles?arrow_forwardA synchronous generator generates 370 V at 55 Hz when the field current is 4.4A. The e.m.f generated when the frequency is 35HZ and the field current is 2.9A is ..... .......arrow_forward
- A synchronous generator generates 350 V at 55 Hz when the field current is 3.7A. The e.m.f generated when the frequency is 35Hz and the field current is 2.3A is ............... Answerarrow_forwardDiscuss the significance of SCR in designing an alternator 10 minute fast please help fastarrow_forwardThe pitch factor for 3rd harmonic in an alternator having 18 slots/pole and coil span 5/6 of pole pitch is?arrow_forward
- Determine the value of the capacitor to raise the power factor to unity when two induction motor must be connected to a capacitor . The first motor is twenty-four kilo watts and power factor 0.8, while the other is forty kilo watts and power factor 0.95.arrow_forwardA small 4-pole generator with a six-turn rotor coil generates the following voltage wave: e = 169.706 sin(40t). Determine the (i) Maximum pole flux (in weber) and (ii) The frequency of the induced voltage (in Hz)arrow_forwardCalculate the voltage per phase for a 3-phase 1500 rpm, 4-pole alternator having a double layer winding with 16 turns per coil. The slots per pole per phase are 8 and the coil span is 20 slots. The phase spread is 60° and the flux per pole is 25.8x10−3 weber.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,
What Is a Plane Wave? — Lesson 2; Author: EMViso;https://www.youtube.com/watch?v=ES2WFevGM0g;License: Standard Youtube License