Introduction to Electric Motor Design

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Introduction to Electric Motor Design
Simulation using Software from theJaewoo
Technology Co., Ltd.
Distributed by Jaewoo Technology Co., Ltd.
www.jaewoo.com Emailjw_at_jaewoo.com /
cae_at_jaewoo.com
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Some people like to use SPUD to navigate the
software - it isnt always necessary but we will
start here
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At the center of all the SPEED software is the
Motor Design program
Here you can select the Design program that you
wish you use.
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Also on SPUD there are links to
On Line Manuals
Material databases (Steel, magnet and brush)
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Finite element packages
- But lets start with the Motor Design.
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Select and start a Motor Design program and
obtain the Menu tool bar
Select New for a new design or Open an existing
design well start a New
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Choose from a standard example
The best way to proceed is to begin with one of
the default designs or maybe one of your own
designs that is close to the machine you wish to
develop.
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The Outline Editor shows the lamination and some
basic dimensions
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Main menu

• Consider the options
• in a logical order
• Data Entry
• Analysis

• Tools

• After Analysis
• Results

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Data Entry
Design data can be entered in various editors
The Outline Editor has already been mentioned.
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• The Template Editor (TED) for PC-BDC

All the parameters are conveniently
organized. Page 1 is often sufficient to get
started.
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The Winding Editor is where the winding can be
edited and various harmonics investigated
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Materials and magnets can be specified using the
Materials dialog
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Click the right mouse button to find menu for
View material
Saves time going through Materials and Magnet
Databases when selecting.
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Choose favorite units using the I/O Units
For fast use, many functions are available as
Hotkeys
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Set up your own Custom Editor
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To edit your Custom template select the template
and pull the EditorOptions menu down on the
toolbar
Add a variable name to list
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Analysis
Whatever SPEED software is used there will be a
variety of analysis or simulation options
Weve been using PC-BDC as an example so we have
Static Design, Dynamic Design, Torque/Speed
curves, Thermal analysis and Ranging facilities.
Most of these are press-and-run though the
Ranging needs setting up (well study that later).
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PC-IMD analysis options
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PC-SRD analysis options
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Results

• The results can be inspected in
• graphical form with Simulation Graphs
• Design sheet
• Custom Design sheet
• Thermal Design sheet
• other forms such as Phasor Diagram

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PC-BDC Static Design - current, e.m.f. and
torque waveforms
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PC-BDC Dynamic Design current waveform
Some switching anomalies in this!
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Using the Integrated Step Length Adjustment ILSA
(to 20)
Thats better!
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PC-BDC Dynamic Design torque waveform
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PC-IMD - Torque / speed characteristic
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PC-SRD Flux linkage curves
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The standard Design Sheet lists input and output
parameters
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Data can be added to the Design Sheet using User
Defined Formulas
Add rotor diameter
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At the bottom of the Design Sheet
The Help bar
This is permanent in the Design Sheet until
edited or deleted.
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Any variable can be Ranged by clicking on the
right-hand mouse button when highlighting a
parameter in TED
over a number of steps by selecting the Ranging
option on the analysis menu
(more than one variable can be ranged at one time
though this isnt 2-D ranging)
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giving a Design Sheet for each step.
Easy selection by clicking on variable with
right-hand mouse button
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Ranging graph
a very powerful tool (sometimes too powerful!).
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To Set up your own Custom Design sheet
Create your own .DSS file for custom
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From the OptionGeneral menu option
Select the particular Custom Design sheet you
wish to use
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Then your own Custom Design sheet is available
which can be copied to the clipboard and pasted
as text into a word processor for your own use
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Tools
There are many useful facilities in the Tools
menu

• The main ones are
• Steel and Magnet Databases (direct access
• rather than going back to SPUD)
• FE Link (can be configured to bypass SPUD)
• FE Results
• Export Data

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Calculator
OR Use the sign in front of the Internal
Parameter Index variable to extract the values,
i.e., piXXX
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Unit Converter
This is useful for refreshing your memory when
switching between different units!
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Scripting
SPEED software can now be interfaced with
packages like Visual Basic
Select and load a .vbs file
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Execute the .vbs file
Results
This shows PC-BDC used as a blackbox procedure.
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The Steel Editor and Comparator can be selected
directly using Steel Databases for entering steel
material data
and inspecting characteristics.
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Steel DBM facilities include loss calculation and
parameter comparison
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Magnet Editor and Comparator can be selected in a
similar way functions include temperature
effects
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FE Philosophy

• PC-FEA (Available soon for distributors
  customers)
• Unique to SPEED Lab integrated into software
• Improves accuracy of particular SPEED
  calculations
• Automatic SPEED procedures (GoFErs)
• ? ? Productivity
• External programs Flux2D, OPERA, MAGNET
• General purpose
• Any geometry
• Advanced problems
• ? ? Advanced analysis

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Speed FEA

• Available soon to distributors customers
• PC-FEA is the SPEED Labs own finite element
  software designed to support the Motor Design.
• The FE Link allows several functions (GoFErs) to
  be carried out with a degree of automation.
• In PC-BDC, there are various GoFErs

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PC-IMD SPEED Procedures
PC-SRD SPEED Procedures
PC-SRD is slightly different since there is a
choice between Unimesh and PC-FEA.
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Setting up the Mesh
The region nodes can be set up using the GDF
editor.
Editing may be necessary if the mesh is very
large.
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Running PC-FEA
The GDF editor generates a .FEA file which can be
edited
The manual contains descriptions of the commands.
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Some lines are more important than others
Increasing maxangle and maxpoints can help
If youve edited the mesh in the GDF editor then
you may wish to comment-out the Mesh Optimisation
line because it may put all the nodes back!
- if youre having problems then try not
optimising anyway.
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Flux plot and numerical values
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Adapting FEA
Wound field machine (still under development)
with lots of stator current
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Restart with no stator current and linear
solution
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Flux due to rotor currents
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FE Results
Many of the GoFEr results obtained in PC-FEA can
be imported into the SPEED software for
comparison
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Match FE - Compare PC-BDC and PC-FEA Bgap
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External Links
SPEED software can also be used as a link to
other FE packages such as Opera from Vector
fields and Flux2D from Magsoft using the GDF
editor
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The .comi file created by the GDF editor can then
be read by VF Opera giving the motor geometry
automatically
this is probably 2 hours work even for a
skilled user!
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Options
Options General lets you set up your own
preferences
Start-up Editor
Windows options
Starting directory
Materials directory
Custom design sheet
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Windows options
Indication of Ranged variable
Single click zoom for lamination and graphs
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Help
An increasing amount of information is now
available on-line via Help
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An addition to the Help menu is Parameter
Information
This is important for those involved in scripting.
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Which can be saved to a Text File
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