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
Use the same toolto draw thisrectangle.
The name will beobject4.
Make the color
green.
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St 2h
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Step 2h
Use the same toolto draw thisrectangle.
The name will beobject5.
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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p
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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p g
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!