Permanent Magnet Motor Modeling
Kaila Krieser, EE
Dan Montgomery, EE
Craig Christofferson, EE
Mark Wisted, EE
Dr. Mani Mina, Advisor
Dr. David Jiles, Advisor
Dave Sowders, Kansas City Plant Client
Problem Objective

The team will select, use and assess an electromagnetic
modeling software tool to simulate Permanent Magnet Motor
operation in variable magnet and environmental
configurations.

Key Steps:
1.
2.
3.
4.
Selection of Tool
Selection of Model
Modeling Execution
Experimental Validation
Conceptual Sketch
Design Motors
Industry
Other
Electromagnetic
Modeling Problems
Modeling Software
Tool Evaluation
Research
Magnet Material
Experiments
System Block Diagram
Research
• PMM Function
• PMM Modeling Fundamentals
• Performance Characteristics
• Magnetic Material Characteristics
Selection
• Software
• PMM CAD File
Software Evaluation
• Accuracy (Stretch Goal: Physical Testing
• Cost
• Usability
• Magnet Materials
• Performance Characteristics
Simulation
• FEMM
• Opera-2D
• ANSYS EM
• MagNet
Functional Requirements

Modeling Tool for Permanent Magnet Motor

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Motor Model Selection
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The selection of the motor model will be based on complexity and
obtainable matching CAD files
Motor Simulation


Various modeling tools will be evaluated for accuracy, available
measurement parameters, usability and cost.
Following the selection of the tool and the model, the simulation of
the chosen motor will be executed with the software.
Stretch Goal: Motor Evaluation and Test Results

In order to validate the modeling software’s efficiency, torque, and
power output data for a permanent magnet motor, the motor must
be tested in a real-world situation.
Constraint Considerations

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Matching CAD File and Software
Modeling Software Tool Training
Cost
Time
Stretch Goal: Matching Motor and CAD File
Deliverables

Software Evaluation Report
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Software Overview
Software Usability
Demonstration of CAD simulation
Evaluation of PMM testing

Validation of simulation results
Technology Consideration

Modeling Tool
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PMM Model

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Cost and Availability
Usability and Training Resources
Measurement Parameters
Magnet Material Library
Stretch Goal: Simulation Environmental Dependencies
Cost and Availability
Compatibility to Modeling Software Tool
Stretch Goal: Physical PMM

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Cost
Size and Complexity
Matching Motor and CAD File
Risks & Mitigation

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Change in Client’s Expectations
Lack of Expertise
Cost Estimate
Item
Cost ($USD)
Modeling Software Tools
MagNet Infolytica
1800.00
ANSYS (Share Cost)
500.00
Vector Fields (30 Day Trial)
0.00
Foster Miller (Free Ware)
0.00
PMM
Used Appliance
200.00
New Motor
300.00
Magnet Variations
- NdFeB
25.00
- Samarium Cobalt
25.00
- Ceramic
25.00
- Alnico
25.00
Labor
Miss Kaila Ann Krieser
4500.00
Craig Christofferson
4500.00
Mark Wisted
4500.00
Daniel Montgomery
4500.00
Total Project Cost (software included) $ 20,900.00
Total Project Cost (software excluded) $ 18,600.00
Market Survey


A comparative analysis from a prospective engineering
graduate is not readily available to the client, software
companies, and research community.
The research and development style of this project
produces intellectual deliverables. As such, similar
projects are uncommon.
Research

PMM Function

Components
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Rotor
Stator
Air gap
Brushless DC
AC Motor Operation
Stator Windings
Stator
Rotor
Air Gap
Permanent Magnets
Research

Modeling Fundamentals

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Finite Element Analysis
Polygonal Mesh Modeling
2D versus 3D Analysis
Solvers

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Static,
Transient
Time Harmonic
Research

Performance Characteristics
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Magnetomotive Force
Reluctance
Permeance
Flux Linkage
Cogging Torque
Output Torque
Efficiency and Loss

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Electrical or Copper Losses
Core Losses
Mechanical Losses
Stray Losses
Research

Magnet Material Characteristics
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Permeability
Retentivity
Hysteresis
Maximum Energy Product
Remanence or Residual Magnetizaion
Coercivity
Curie Temperature
Research

Magnetic Materials

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Ferromagnets
Alnico
Ceramic
Samarium Cobalt
Neodymium-Iron-Boron (NdFeB)
Comparison of Materials
Modeling Software Tools

Finite Element Method Magnetics (FEMM)

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Cobham Opera-2D
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Advanced, free 30 day trial
ANSYS Electromagnetics Solutions

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Simple, free software
Advanced, department provided
Infolytica MagNet

Dr. Jiles (Department Chair) recommended, Dr. Jiles
provided
Evaluation Criteria

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Cost
Usability
Performance Characteristics Variability
Magnetic Material Variability
Environmental Variability
Interpretation of Simulation Results
Output Data Accuracy
Stretch Goal: Physical Testing

Magnetomotive Force

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Flux Linkage
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Specific experimental apparatus
Output Torque

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Back EMF
Cogging Torque

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Gaussmeter and Fluxmeter
Dynamometer
Efficiency

Electrical power in versus mechanical power out
Current Project Status

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Modeling Software Tool Status
FEMM Modeling
Research Evaluation Motor Options
Project Contacts

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Dr. David Jiles
Dr. Faris Al-naemi
Dr. Mani Mina
David M. Sowders
Dr. William McCallum
Project Milestones & Schedule
Member Contributions

Kaila Krieser

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Mark Wisted
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FEMM Modeling
Software Research
Website
Dan Montgomery

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Weekly Reports
Magnetic Material Research
Communicator
Motor Research
Craig Christofferson
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Contacted Software Companies
FEMM Modeling
Future Plan
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Remaining questions
Narrow modeling software tool options for client by
middle of February
Acquire evaluation motor by the beginning of February
with magnetic variation
Stretch Goal: Start physical testing by March
Questions?