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Duane Hanselman -
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Office: 203 Barrows Hall
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Snail Mail:
5708 Barrows Hall
Orono, ME 04469-5708
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Phone: (207) 581-2246
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FAX: (207) 581-4531
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Email: duaneh@eece.maine.edu
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Research: Electro-mechanical devices and motion control systems,
MATLAB programming
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Expert witness for patent infringement cases. Worked for both
plaintiffs and defendants; expert reports and rebuttals, Markman
hearings, depositions, court room testimony. Clients include General
Electric, Texas Instruments, Tyco.
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Expert opinion for insurance and liability cases. Issues regarding
electricity and electrical devices: Cause and origin for electrical
related fires; Electrical product malfunction; Counterfeit
electrical devices.
- The text “Brushless Permanent
Magnet Motor Design” can be found at www.eece.maine.edu/motor.
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The Mastering MATLAB Toolbox can be found at www.eece.maine.edu/mm.
- Dr. Hanselman has been involved in
the design, analysis, and simulation of brushless PM motors, step
motors, resolvers, and motion controls systems since 1985. He has
written numerous texts and he consults and performs research for a
variety of companies. In addition, he presents one to three day
short courses on the design of brushless DC motors for individual
companies and the Small Motor Manufacturers Association (SMMA).
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Dr. Hanselman is a Senior Member of the IEEE.
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TEXTBOOKS:
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Mastering MATLAB 6,
(with Bruce Littlefield),
Prentice Hall, 2001, 814p.
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Mastering MATLAB 5,
(with Bruce Littlefield),
Prentice Hall, 1998.
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The Student Edition of MATLAB User's Guide, version 5,
(primary author: Bruce
Littlefield), Prentice Hall, 1997.
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Mastering MATLAB, (with Bruce
Littlefield), Prentice Hall, 1996.
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MATLAB Tools for Control System Analysis and Design, 2nd Ed.
(with B.C. Kuo), Prentice Hall, 1995.
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The Student Edition of MATLAB User's Guide, version 4, (with
Bruce Littlefield and The
Mathworks Inc.), Prentice Hall, 1994.
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MATLAB Tools for Control System Analysis and Design, (with
B.C. Kuo), Prentice Hall, 1994.
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Brushless Permanent Magnet Motor Design, McGraw-Hill, 1994.
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RECENT PUBLICATIONS:
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D. Hanselman, "Motor Constant Indicates Brushless Motor
Performance," PCIM Power Electronic Systems., vol. 24,
no. 12, pp. 32-39, December 1998.
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D. Hanselman, "Effect of Skew, Pole Count, and Slot Count on
Brushless Motor Radial Force, Cogging Torque, and Back Emf,"
IEE Proceedings, Electr. Power Appl., vol. 144, no. 5, pp.
325-330, September 1997.
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D. Hanselman, "Cogging Torque Relationships for Skewed and
Unskewed Brushless DC Motors," Proceedings: Twenty-Sixth
Annual Symposium on Incremental Motion Control Systems and Devices,
San Jose, CA, pp. 123-128, July 1997.
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D. Hanselman, "Fourier Decomposition of Radial and Tangential
Forces in Brushless DC Motors," Proceedings: Twenty-Fifth
Annual Symposium on Incremental Motion Control Systems and Devices,
San Jose, CA, pp. 137-144, June 1996.
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D. Hanselman and William Peake, "Eddy Current Effects in
Slot-Bound Conductors," IEE Proceedings, Electr. Power
Appl., vol. 142, no. 2, pp. 131-136, March 1995.
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D. Hanselman, "Minimum Torque Ripple, Maximum Efficiency
Excitation of Brushless Permanent Magnet Motors," IEEE
Transactions on Industrial Electronics, vol. 41, no. 3, pp.
292-300, June 1994.
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D. Hanselman, "Sources of Torque Ripple in Brushless
Permanent-Magnet Motors," Proceedings: Twenty-Third Annual
Symposium on Incremental Motion Control Systems and Devices, San
Jose, CA, pp. 137-144, June 1994.
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RECENT CONTRACTS:
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Technology Assessment, Motile Systems, Portland, OR, 2002.
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Brushless Motor Design, Mystic Innovations, Mytic, CT, 2001-2002.
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Brushless Motor Software Development, BAE Systems, Rockville, MD,
2001.
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Brushless Motor Analysis, Cleveland Motion Controls, Cleveland, OH,
2000.
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Microactuator Design, Optimal Energy Systems, Torrance, CA, 2000.
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Brushless Alternator Design, Raven Technology, Brunswick, ME,
1999-2000.
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Brushless Motor Design, Bayside Motion, Port Washington, NY,
1998-2002.
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Brushless Motor Software Development, Marconi Systems, Rockville,
MD, 1999.
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High Power Motor Assessment, Bath Iron Works, Bath, ME, 1999.
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Actuator Design, Pangolin Systems, Orlando FL, 1999.
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Microactuator Design, Texas Instruments, Dallas Texas, 1997-98.
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Brushless Motor Technology Assessment, Saturn Electronics and
Engineering, Inc., Auburn Hills, MI, 1997.
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Brushless Motor Design, MFM Technology Inc., Ronkonkoma, NY,
1996-present.
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Development of Plastic Drum Brushless Motor Design Software,
Wellington Drive Technologies Ltd., Auckland, New Zealand, 1997.
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Assessment of Brushless Motor Technology for use in a Voice-Actuated
Shower Enclosure, Daryl Industries, Wirral, England, 1996.
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Development of Brushless Resolver Design and Analysis Software,
Admotec Inc., Norwich, VT, 1996.
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Assessment of Plastic Brushless Motor Technology, Seitz Inc.,
Torrington, CT, 1996.
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Assessment of Plastic Brushless Motor Technology, Shurflo Pump Co.,
Santa Anna, CA, 1996.
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Development of Pancake Brushless Motor Design Software, Wellington
Electric, Torrington, CT, 1996.
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High Speed Brushless Motor Design, Test Devices Inc., Hudson, MA,
1996.
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Brushless Motor Analysis for Sleep Apnea Applications, Respironics,
Murrysville, PA, 1996.
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Brushless Motor Design, Knolls Atomic Power Laboratory, 1995-96.
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Expert Witness in a patent infringement lawsuit between General
Electric and Emerson Electric, Sept. 1994 - June 1995. Case involved
25 claims spread over 5 patents.
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Assessment of Brushless Motor Technology for Vacuum Cleaners, RexAir
Inc., Cadillac, MI, 1994.
