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 Expert  108398

Expert in Brushless DC Motors

Available for your Consulting and Expert Witness Needs

Oregon (OR)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness

Summary of Expertise: Listed with other top experts in: 
ELECTROMAGNETIC ENGINEERING. Expert has 20 years of experience in electromagnetic engineering and has acquired 10 patents in this area. He has designed or supervised the design of linear and rotary actuators, brushless DC motors, solenoid-related devices, valve actuators, sensors, and magnetic instruments using electromagnetic principles.

BRUSHLESS DC MOTOR DESIGN. As a former Chief Scientist of a major producer of brushless DC motors, Expert has expertise in these motors for disk drive, pump, medical, vehicle, and robotic applications.

COMPUTATIONAL ELECTROMAGNETICS; MAGNETICS. Expert has used finite element and finite difference analyses and other computational methods to solve for magnetic forces, fields, eddy currents, and more. He has also conducted seminars and taught college classes in these areas. He has written special programs for pulse effects versus time motion due to magnetic effects.

MAGNETIC DESIGN. Expert is familiar with permanent magnets, magnetizing methods, and magnetic equipment. He has designed magnetic devices and analyzed permanent magnetic fields. He has worked with magnetic lenses and focusing, magnetic clutches and brakes, magnetic clamps, separators, and instruments. He has studied permanent magnets for power generation, materials separation, position and velocity sensors, and direction detectors.

ACTUATOR DESIGN. Expert has 20 years of experience in the design of rotary and linear actuators. He has designed linear actuators for the Cray 1 supercomputer and a host of other actuators from very small (1/4-inch wide) to very large (6 ft. long stator, thousands of pounds of force).

VALVE ACTUATOR. Expert has worked on many designs of valve actuators for servo-valves, flow control, ultra-fast response, and minimum-energy activation.

AUTOMATIC CONTROL. He is experienced with control of machine tools, valves, disk drive head assemblies, motors, and actuators. He has studied stability, minimum access time, position, and acceleration as it relates to automatic control. He has industrial experience with control theory and active damping of vibration.

FATIGUE ANALYSIS. He is experienced with the failure of materials due to accumulated damage from stress and strain in shapes, structure, surfaces, plates and the effects of surface roughness, stress concentration, and stress history versus time as it is applied to machinery. He has taught this subject as a college professor.

PNEUMATIC CONVEYOR DESIGN. Expert has designed conveyors which move bulk materials through tubes by entrained air flow both vertically, horizontally, or in combination.

THERMAL ANALYSIS. With many years of experience in this area, Expert has studied heat flow and distribution in machines, structures, motors, and electronic devices. He understands thermally-induced stress and deformation, forced and natural convection, conduction, and radiation.

FLUID DYNAMICS. Expert is familiar with the flow of gasses and liquids and the associated drag and pressure changes due to flow.




automatic control


brushless direct-current motor


computational electromagnetics


electromagnetic engineering




finite difference analysis


linear actuator


magnetic component design




material fatigue testing


pneumatic conveying


pneumatic conveyor


thermal analysis


valve actuator

Show Secondary and Basic Areas of Expertise
Expert may consult nationally and internationally, and is also local to the following cities: Portland, Oregon;  Eugene, Oregon;  Salem, Oregon;  Gresham, Oregon;  Beaverton, Oregon;  Hillsboro, Oregon;  Springfield, Oregon;  and Vancouver, Washington.

Often requested
with this expert:

Motor and Generator Design and Development
Design of Electric Motor, Generator, Stepper Motor, Servo...
Electric Motors, Generators, Wind Energy, Voltage...
Permanent Magnet Motors, Generators, Devices and Materials

Year   Degree   Subject   Institution  
1969   MS   Mechanical Engineering   California Institute of Technology  
1965   BS   Mechanical Engineering   California Institute of Technology  

Work History:
Years   Employer   Title  

1996 to






1988 to 1996



Independent Consultant


1983 to 1988


Synektron Corporation


Chief Scientist


1981 to 1983


Ibis Systems


Consulting Engineer


Career Accomplishments:

Expert is a member of IEEE


Expert is a Professional Engineer licensed in the State of California.

Publications and Patents Summary

Expert has 12 patents with several pending.

Consulting Services:
Recent Client Requests:
  • Expert in Rare-earth Magnet.
  • Expert in Shading Rings for AC solenoid.
  • Expert for consulting on design of centrifugal pump for medical ventilator.
  • Expert in solenoid design for consulting on development of the magnetic flux and electrical calculation.
  • Pneumatic actuator expert for consulting on Pneumatic valve actuator training.
  • BLDC motor expert needed for consulting regarding elimination of motor noise in brushless DC project development.
  • Expert in 68KW DC motor to assist with troubleshooting and assembly.
  • Solenoid expert for consulting on Techinal troubleshooter for outsourced solenoid part.
  • Expert in brushless DC motors.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

International Experience:
Country / Region   Summary
Germany   He has lived for several years in Germany and has consulted with clients in Germany over the past several years
Japan and Canada   He has visited and consulted for companies in Japan and Canada.

Language Skills:
Foreign Language   Description
Danish   Expert is fluent in Danish
German   Expert is fluent in German

Additional Skills and Services:
Supplier and Vendor Location and Selection

Expert has experience locating vendors of the following: * Magnetic materials and instruments * Special manufacturing processes (laser machining, ultra-accurate machining, ceramic machining) * Sensors.

He has an extensive personal library (5,000 technical books) for vendor location.


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