Homework Help is Here – Start Your Trial Now!
Engineering
Electrical Engineering
The permanent magnet in Figure 1 is made of alnico 5, whose maximum energy product (-BmHm) is 40 kJ/m³. A flux density of Bg = 0.8 T is to be established in the air gap. The air gap has the dimensions A,= 2.5 cm² and l,= 0.4 cm. (a) Determine the minimum volume of the permanent magnet to produce the necessary air gap flux density. (b) Repeat part (a) if the permanent magnet is NdFeB (Neodymium-Iron-Boron), whose maximum energy product is 295 kJ/m³. (c) Calculate the reduction of the permanent magnet volume (the ratio of the NdFeB volume to the alnico 5 volume) required to produce the same flux density in the air gap by replacing alnico 5 with NdFeB. Assumption: The magnetic reluctance of soft iron is negligible, and the permeability of free space is µo = 4-7T-10-7 H/m.

The permanent magnet in Figure 1 is made of alnico 5, whose maximum energy product (-BmHm) is 40 kJ/m³. A flux density of Bg = 0.8 T is to be established in the air gap. The air gap has the dimensions A,= 2.5 cm² and l,= 0.4 cm. (a) Determine the minimum volume of the permanent magnet to produce the necessary air gap flux density. (b) Repeat part (a) if the permanent magnet is NdFeB (Neodymium-Iron-Boron), whose maximum energy product is 295 kJ/m³. (c) Calculate the reduction of the permanent magnet volume (the ratio of the NdFeB volume to the alnico 5 volume) required to produce the same flux density in the air gap by replacing alnico 5 with NdFeB. Assumption: The magnetic reluctance of soft iron is negligible, and the permeability of free space is µo = 4-7T-10-7 H/m.

Introductory Circuit Analysis (13th Edition)
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
icon
Related questions
Question
100%

ssolve this question

The permanent magnet in Figure 1 is made of alnico 5, whose maximum energy product (-BmHm) is 40 kJ/m³. A flux density of B, = 0.8 T is to be established in the air gap. The air gap has the dimensions A,= 2.5 cm² and l,= 0.4 cm. (a) Determine the minimum volume of the permanent magnet to produce the necessary air gap flux density. (b) Repeat part (a) if the permanent magnet is NdFeB (Neodymium-Iron-Boron), whose maximum energy product is 295 kJ/m³. (c) Calculate the reduction of the permanent magnet volume (the ratio of the NdFeB volume to the alnico 5 volume) required to produce the same flux density in the air gap by replacing alnico 5 with NdFeB. Assumption: The magnetic reluctance of soft iron is negligible, and the permeability of free space is µo = 4-T-10-7 H/m.
Transcribed Image Text:The permanent magnet in Figure 1 is made of alnico 5, whose maximum energy product (-BmHm) is 40 kJ/m³. A flux density of B, = 0.8 T is to be established in the air gap. The air gap has the dimensions A,= 2.5 cm² and l,= 0.4 cm. (a) Determine the minimum volume of the permanent magnet to produce the necessary air gap flux density. (b) Repeat part (a) if the permanent magnet is NdFeB (Neodymium-Iron-Boron), whose maximum energy product is 295 kJ/m³. (c) Calculate the reduction of the permanent magnet volume (the ratio of the NdFeB volume to the alnico 5 volume) required to produce the same flux density in the air gap by replacing alnico 5 with NdFeB. Assumption: The magnetic reluctance of soft iron is negligible, and the permeability of free space is µo = 4-T-10-7 H/m.
Soft iron Permanent magnet & (air gap) Ag Am Figure 1. Permanent magnet system. e
Transcribed Image Text:Soft iron Permanent magnet & (air gap) Ag Am Figure 1. Permanent magnet system. e
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Inductor
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
  • SEE MORE QUESTIONS
Recommended textbooks for you
Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:
9780133923605
Author:
Robert L. Boylestad
Publisher:
PEARSON
Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:
9781337900348
Author:
Stephen L. Herman
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Electrical Engineering
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education
Fundamentals of Electric Circuits
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:
9780078028229
Author:
Charles K Alexander, Matthew Sadiku
Publisher:
McGraw-Hill Education
Electric Circuits. (11th Edition)
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:
9780134746968
Author:
James W. Nilsson, Susan Riedel
Publisher:
PEARSON
Engineering Electromagnetics
Engineering Electromagnetics
Electrical Engineering
ISBN:
9780078028151
Author:
Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:
Mcgraw-hill Education,
SEE MORE TEXTBOOKS