18-16 A steel flywheel in the form of a solid disk has a radius of 0.2 m and a thickmess of 0.1 m.(a) What is the maximum rotational frequency that is compatible with the material characteristics of this flywheel?(b) What is its energy storage capacity at maximum rotational frequency?(c) If the flywheel is energized by a motor with a power output of 1 kW (at 100 % efficiency) how long would it take toincrease the rotational frequency from zero to the maximum?

A)For steel, ρ=8050 kg/m3The loop stress due to rotation,σ=ρω2r2

18-16 A steel flywheel in the form of a solid disk has a radius of 0.2 m and a thickmess of 0.1 m. (a) What is the maximum rotational frequency that compatible with the material characteristics of this flywheel?

18-16 A steel flywheel in the form of a solid disk has a radius of 0.2 m and a thickmess of 0.1 m. (a) What is the maximum rotational frequency that compatible with the material characteristics of this flywheel?

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 "unipolar" generator consists of a copper disk of radius R. rotating in a uniform, steady magnetic…

A: An electrically conductive disc or cylinder moving in a plane perpendicular to a homogeneous static…

Q: Pull-out torque of a SCIM occurs at that value of slip where rotor power factor equals a) unity b)…

A: The pull-out torque of a Squirrel Cage Induction Motor (SCIM) occurs at the value of slip where the…

Q: 30. A) Why is there a small emf generated in a series generator at no load? a) the residual magnetic…

A: Solve for both

Q: Example 3-1 An armature is wound simplex lap in a six-pole generator. The total number of conduc-…

Q: A self-excited DC generator has lost its residual magnetism and therefore cannot work (cannot…

Q: Q-A 6-pole lap-connected dc generator with 480 conductors has armature resistance of 0.06 ohm. If…

A: here we have to find the value of armature resistance for the wave winding.

Q: 3. A d.c. generator generates an e.m.f. of 520 V. It has 2,000 armature conductors, flux per pole of…

A: Emf generated in DC generator is given as, E=(N*P*ϕ*Z)/(60*A) Where N= speed in rpm P= number of…

Q: 6- The armature of d.c. machine of 4-pole and wave-connected has 294 conductors. (a) Find the useful…

Q: Exereise 2-1: The armature core of a 4 pole de machine has 31 slots ench designed to accomodate 4…

Q: Three main types of permanent magnet materials have been used in industry. Discuss their Ferrite…

Q: Jump to level 1 a b C 1 0 0 10 10 0 N Z=c+a Delete selected item(s) Undo Click to add DAK

Q: The machine shown in Figure 2 has three concentrated stator coils, each of eight turns. The coils…

Q: The armature of d.c. machine of 4-pole and wave-connected has 294 conductors. (a) Find the useful…

A: Given P = 4 Z = 294 Eg = 230 V

Q: A self-excited DC generator has lost its residual magnetism and therefore cannot work (cannot…

Q: One of the disadvantages of using salient- pole rotor shape Select one: a. The generated voltage…

A: One of the disadvantages of using salient pole rotor shape a. The generated voltage more than the…

Q: 6. Calculate the flux in a 4-pole dynamo with 722 armature conductors generating 500 V when running…

Q: The 8259 PIC has 8 interrupt request (IRQ) inputs. Two 8259's can be to increase the number of IRQS…

A: The Intel 8259A Programmable Interrupt Controller handles up to eight vectored priority interrupts…

Q: Q14. A synchronous generator is operating in symmetry condition. Will an e.m.f. be induced in the…

A: As the flux that links with the conductor definitely changes with the time, thus there is an induced…

Q: The negative field intensity required to force the residual magnetism is known as ?

A: Corceive force .

Q: Find the maximum efficiency of shunt generator has the armature resistance and shunt resistance 0.08…

A: Given Ra=0.08 Ω Rsh=120 Ω Wr=800 W VT=250 V

Q: Discuss the saturation of a permanent magnet generator

Q: The armature of DC machine has an outer diameter 55cm and effective Length is 25cm, the armature has…

Q: A DC machine has 2 poles on the stator, the armature winding has 20 coils and 8 turns per coil. The…

A: Poles=2 Coils=20 Turns per coil=8 r=12.5 cm l=25 cm

Q: The current in a conductor on the armature of a dc motor is 300A. The flux under the poles is…

Q: 1.- The production of a force in a conductor carrying current that is inside a magnetic field, is…

A: 1.- The production of a force in a conductor carrying current that is inside a magnetic field, is…

Q: PLEASE ILLUSTRATE AND MAKE SURE TO WRITE IT ON A PIECE OF PAPER THANK YOU SO MUCH The field coils…

A: In this question we need to find average voltage which is induced across field terminals.

Q: An alternating current generator has a square loop (with side length a) mounted on a vertical shaft…

A: Angular velocity is the speed at which the angle between two bodies changes as an item rotates or…

Q: for the stator configuration inside if current il =im sin( wt-30) and i2 =im sin(wt-30) are provided…

A: Assume that stator is connected from single phase supply which is supplied by two currents i1 and…

Q: Question 1/ Choose True for correct sentences and False for the wrong sentences True False The same…

A: As per our guidelines we are supposed to do the first 4 subparts of a question. Kindly post the…

Q: The aluminum disc of an energy meter will be located on top of Shunt magnet Select one: True False

Q: 2. The field coils of a six-poles D. C. generator each having 600 turns, are connected in series. On…

A: Given data, Number of poles P = 6. Number of turns N = 600. Main magnetic flux ϕm=0.024 wb/pole.…

Q: 4-pole direct current electric machine works as a generator. In this direct current machine, which…

Q: At certain instant, the angle (Өe) of the rotor flux vector is 60° .The output signals ids and iqs…

A: The angle of the rotor flux vector is 60°. iDS = 20A iQS = 40A Using the inverse DQ -> dq…

Q: Please solve it Asap with solution and explanation

A: Step 1: Step 2: Step 3: Step 4:

Q: 3. For the motor below, find the flux flowing through the motor with only the air gap between the…

A: Given motor Total surface area A=188 cm2Average air gap l=1 mmTurns in the coil N=1000Current I=1 A

Q: C2 (ii) Explain the operating characteristics of wind mill. C2 (iii)Wind-turbine units are rated at…

A: Solution- C2 (ii). The operating characteristics of wind mill are as following- 1. The wind turbines…

Q: What happens to the reluctance of a magnetic path if its length is doubled? If the crosssectional…

A: The formula for Reluctance is: R=lμAWhere,R=Reluctancel=Length of the magnetic pathA=Cross section…

Q: Q4. Determine the tip speed ratio if a wind turbine that is 10 m long is turning at 20 rpm in an…

A: Given, Speed of wind turbine (N)= 20 rpm Wind velocity (V)= 8 mph = 3.576 m/sec Length of wind…

Q: (A) The induced emf and the magnetic flux across the rectangular loop are out of phase by 90°. (B)…

A: The generator is a electrical machine which is capable of converting the mechanical power input into…

Q: PLEASE ANSWER IT IMMEDIATELY A 10 pole, 400 kW, 250 V, dc generator has a lap wound armature with…

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

18-16 A steel flywheel in the form of a solid disk has a radius of 0.2 m and a thickmess of 0.1 m.
(a) What is the maximum rotational frequency that is compatible with the material characteristics of this flywheel?
(b) What is its energy storage capacity at maximum rotational frequency?
(c) If the flywheel is energized by a motor with a power output of 1 kW (at 100 % efficiency) how long would it take to
increase the rotational frequency from zero to the maximum?

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

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 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

Within A.C. Generators, explain the function of; The armature Slip rings
H.W-3 1- Why the capacity of SG is taken in kVA and for IM is taken in kW? 2- Explain the effect of changing the load (inductive-capacitive- resistive) on SG terminal voltage? 3- Why the magnetization curve of SG is similar to the B-H curve of armature steel core? 4-Write a short report about Blondel two-axis theory for SG?
Can you answer the question?
Determine if TRUE or FALSE In a soft magnet, high hysteresis is lost per cycle operation.
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
Assume the stator and rotor magnetic fields of a generator, "Bs" and "BR," are in the x-y plane and the direction of the prime mover is counterclockwise. If the angle from the vector BR to Bs is 330°, measured counterclockwise, what would be the direction of the resulting induced torque? O A. Along the -z axis O B. In the x-y plane OC. counterclockwise O D. clockwise O E. Along the +z axis
➡ A four-pole Series connected generator has a lap connected armature with 728 conductors. If the generator supplies one hundred incandescence lamp (100 V, 60W). The series field and armature resistance are 0.2 ohms and 0.015 ohms respectively. Find the series field current.
The operation of electrical rotating machines can be thought to be the interaction of two sets of magnet, one produced by stator coils and the other produced by rotor coils. If stator produces 6 poles, explain how many poles rotor must produces for successful steady operation.
Which of the following statements regarding the principle of rotor operation are true? Select one or more: a. In horizontal axis wind turbines, it is desired that the lifting force be as small as possible. Ob. Drag pulls the wing backwards (HAWT). c. The operation of the Savonius rotor is based on drag.
The armature of a d.c. generator consists of 40 coils and each coil has 20 turns. When the armature is rotated at 200 rad/s in a 4-pole field structure having a flux of 5 mWb/pole and there are four paths in the armature, calculate (i) number of armature conductors (ii) the voltage between brushes generated by the armature.
× 4:03 K s.eng.ruh.ac.lk □ Û 8. Figure 4 shows the core of a simple dc motor. The magnetization curve for the metal in this core is given by Figure 5 and Figure 6. Assume that the cross-sectional area of each air gap is 18 cm² and that the width of each air gap is 0.05 cm. The effective diameter of the rotor core is 4 cm. L It is desired to build a machine with as great a flux density as possible while avoiding excessive saturation in the core. What would be a reasonable maximum flux density for this core? ii. What would be the total flux in the core at the flux density of part (i)? iii. The maximum possible field current for this machine is I A. Select a reasonable number of turns of wire to provide the desired flux density while not exceeding the maximum available current. Flux Density, B (T) 2.8 སྤྲ ཤཱ ཀ ཀཱ བྷ ཀ ཡཱཾ བ ་ 1.2 1.0 0.4 0.2 4-48cm Figure 4 0 10 20 30 40 50 100 → Depth 4 cm -0.05 cm 200 300 500 1000 2000 Magnetizing Intensity, H (A.turns/m) Figure 5 Magnetization curve…