maxwell SV 使い方

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Basic User ManualMaxwell 2D

Student Version

Rick HoadleyJan 2005

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Overview

Maxwell 2D is a program that can be used tovisualize magnetic fields and predict magnetic

forces. Magnetic circuits are difficult to design because the

materials used are non-linear and the fields can not

be confined like electrons within wires. This program makes the design process much

easier.

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Steps (1-4)

These are the eight steps in designing and

analyzing a magnetic circuit.

1. Open a project (set up the file name and type ofproblem)

2. Define the model (draw the items in the circuit)

3. Setup the materials (specify what each item ismade of)

4. Setup boundaries and sources (specify whathappens outside the window you are looking at,and specify any currents that are flowing within

any item)

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Steps (5-7)

5. Setup executive parameters (are there forces ortorques you want to have calculated?)

6. Setup solution options (determine how accurateyou need your answers, because the solution isiterative in order to get closer and closer to the

final answer.7. Solve the problem (uses automatic meshing and

finite element analysis to solve the problem)

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Steps (8-9)

8. Post Process (look at the solution to the problem.This can be a plot of any of the following:

Flux lines

Magnitude or vector of B

Magnitude or vector of H

Magnitude or vector of J

Energy

Torque

Force

etc )

9. Exit Maxwell

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Example

The best way to learn this is to try an exampleyourself.

I would suggest that you make a copy of thisdocument in order to follow along as you workthrough the example.

The next page shows what we will create and thenproduce a plot of the flux lines and a plot of the field

strength.

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Layout of Example

Steelplate

Stainless Steel

plate

Aluminumplate

Magnet1 Magnet2

N N

NOTES:1. The North pole for Magnet1 is in theupper right hand corner.

2. The North pole for Magnet2 is at the top.

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Field Lines of Example

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Download & Install

Lets get started.

You need todownload and

install Maxwell 2DSV (studentversion) onto your

computer. It canbe found at:http://www.ansoft.com/

maxwellsv/

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http://www.ansoft.com/maxwellsv/http://www.ansoft.com/maxwellsv/http://www.ansoft.com/maxwellsv/http://www.ansoft.com/maxwellsv/

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System Requirements

You need to haveWindows NT or2000 or XP in

order to run thisprogram.

Windows 98SE

might work, butthere is noguarantee nor

support.

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Sample Projects

Dont forget to alsodownload theirGetting Started

Guides andSample Projects.

These guides are

a little moreadvanced than thisBasic User

Manual. They willhelp you work onother problems.

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Users

Be sure you meetthe criteria theyrequire for a free

copy of thisexcellent program.

The download size

is about 36MB so use a highspeed internet

connection!

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Step 1a

On your desktop is the icon for this.

Double click the icon to start the program.

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Step 1b

This is the main toolbar.

Click on [PROJECTS].

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Step 1c

This is where youmanage yourMaxwell projects.

Click on [New].

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Step 1e

This is the screenyou use to createthe details of the

model. Along the left hand

side are the steps

we will follow inorder from top tobottom.

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Step 1f

Set the type ofsolver to beMagnetostatic

Set the drawingcoordinate systemto be XY plane

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Step 2a

Now we draw theobjects.

Click on [Define

Model]

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Step 2c

The tools are basicdrawing tools.Well use the

rectangle drawingfunction.

After clicking onthe rectangle in the

toolbar, go to thescreen and clickthe top left corner

for the magnet. Then click thelower right cornerto complete the

magnet.

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S d

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Step 2d

After you draw anobject, this windowappears. It asks

you for a name ofthe object andwhat color you

want it to be. We will leave the

name as object1

and leave the coloras red.

Click [OK].

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S 2

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Step 2e

Use the same toolto draw thisrectangle.

The name will beobject2.

Make the color

grey.

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St 2

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Step 2g



Make the color

green.

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St 2h

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Step 2h



Keep the color red.

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St 2i

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Step 2i

To exit thiswindow, go to File,Exit.

When the smallwindow appears,click on [Yes].

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Step 3a

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Step 3a

This brings youback to thisscreen. Notice

that there is acheck mark to theright of [Define

Model], since thatstep has beencompleted.

Now, click on[Setup Materials]

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Step 3b

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Step 3b

This screen allowsyou do define whatmaterial each

object is made of.

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Step 3c

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Step 3c

Click on object1in the Objectsection. This will

cause double linesto outline thedrawing of the

object. Then find and click

on NdFe30 in the

Material section. Click on [Assign].

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Step 3e

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Step 3e

Click on Align witha given direction

Fill in 45 for the

angle Remember that 0

degrees points to

the right, 90 degpoints up, 180 degpoints to the left,

and 270 deg pointsdown.

Click on [OK]

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Step 3f

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Step 3f

You now see thatNdFe30 has beenassigned the

Material forobject1 in theObject section.

We need to dosimilarassignments for

the other objects.

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Step 3h

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Step 3h

Click on Alignwith a givendirection

Fill in 90 for thedegrees angle

Click on [OK].

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Step 3i

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Step 3i

Click on object2

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Step 3j

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Step 3j

Click onsteel_1008

Click on [Assign]

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Step 3k

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Step 3k

Click on object3

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Step 3m

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Step 3m

Click on object4

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Step 4a

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Step 4a

We are back tothis window.

Note the check

mark next to the[Setup Materials]

Click on [Setup

Boundaries /Sources]

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Step 4d

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p

Click onto theballoon button.

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Step 4f

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The outside redrectangle has nowbeen assigned as

a balloon, meaningthat it is like thereis no boundarythere at all however, thesolutions will notbe accurate

outside the redrectangle.

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Step 4g

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Simply click onFile, Exit, and[Yes] in the

confirmationwindow.

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Step 5a

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There is now acheck mark next to[Setup Boundaries

/ Sources] We do not need to

do anything with

[Setup ExecutiveParameters]

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Step 6a

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Click on [SetupSolutionOptions]

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Step 6b

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This windowappears.

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Step 7a

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There is now acheck mark next to[Setup Solution

Options] Last big step is to

now solve the

problem. Click on [Solve]

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Step 8a

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There is now acheck mark next to[Solve]

In order to see theresults, click on[Post Process]

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Step 8d

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Click on the Fillbutton to turn thefill on or off. I like

it on, so theobjects will besolid and not justoutlines.

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Step 8g

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This window asksfor moreinformation

regarding what youwant the plots tolook like.

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Step 8h

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I usually turn offthe Show colorkey

Then I increasethe Divisions to30 (better if it is an

even number) Click [OK]

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Step 8i

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There! You nowhave a plot of theflux lines due to

the arrangement ofobjects youdefined.

But wait! Theresmore!

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Step 8j

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It is easy to zoominto the plot inorder to see what

is going on indifferent places.

Simply click on the

Magnify button,click at the upperleft corner of whatyou want to fill the

screen, then clickat the lower rightcorner.

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Step 8k

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If you want to seesome other kind ofplot, click on Plot,

Delete This window will

show you what is

presently beingdisplayed.

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Step 8l

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Click on the plotthat you wanterased from the

screen to highlightit.

Click on [OK]

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Step 8m

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Click on [Yes]

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Step 8o

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Lets look at themagnetic field thatis present around

the objects. Click on Plot, Field

Click on Mag B in

the left handcolumn

Click on Surface

background in themiddle column

Click on [OK]

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Step 8p

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Leave everythingas it is.

Click [OK]

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Step 8q

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Now you see howthe magnetic fieldis spread out

around the objects. The key shows

how to interpretthe colors withrespect to themagnetic fieldstrength, in units of

Tesla.

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Step 8r

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You can zoom intothis the same wayas before.

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Step 9a

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What do you do ifyou now want toexit the Maxwell

program? First, close this

screen by clickingon File, Exit.

Then click [Yes] inthe confirmationwindow.

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Step 9b

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Click on [Exit]

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Step 9c

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Click on [Yes] inthe confirmationwindow.

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Step 9d

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Before you leave,you can click on aproject name and

see a roughpicture of it in thewindow.

Since this is new,you may need toclick on a differentproject name and

then back to thisone.

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Step 9e

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Click back ontotest001 and youwill see the objectsof this project inthe window. Thishelps you find aproject you may be

looking for.

To continue to exitthis program click

on [Exit]

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Step 9f

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Click on [Exit] in thetop bar

Click [Yes] in the

confirmation window Thats all, folks!

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maxwell SV 使い方