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 Expert  716404

Expert in Power Electronics, Power Supplies

Available for your Consulting and Expert Witness Needs

Virginia (VA)
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness

Summary of Expertise: Listed with other top experts in: 
Expert is familiar with the characteristics of power semiconductor devices, and their relative strength and limitations as they are applied to power conversion equipment. His expertise also includes the non-destructive testing of devices to determine the failure mode and to define their safe operating area.

power semiconductor device


semiconductor strength

Expert is proficient in magnetic material loss characterization and design considerations when applied to high-frequency inductor and transformer design for power conversion equipment.



power inductor

Expert's expertise includes power converter topologies and design consideration for high-frequency, high-density, and high-performance operation. This technology has been widely applied to the computer and telecommunication industries.

high-frequency electric power converter

Distributed power supplies systems have gained wide acceptance in recent years as opposed to the traditional centralized system. Expert is familiar with design considerations such as modularity, parallelability, maintenance, and hot plug (on-line replacement). He is also experienced in system stability and compatibility that are essential to successful implementations.

distributed electric power supply system


power-supply circuit


switched-mode power supply circuit

Expert is familiar with power factor correction circuits for single-phase and three-phase inputs. Power factor correction will be mandated for all future electronics equipment. The technical issues he works with involve cirucit topologies, control techniques, and soft-switching techniques to improve EMI and to reduce filter size and weight be means of high frequency operation.

power electronics


power quality

Expert has extensive experience in a variety of space programs, most recently with EOS and Space Station Freedom programs. He has developed technologies for solar array switching units, battery chargers, and discharger systems. He also has developed a power systems simulator for a high-voltage distributed power system for space applications.

space power system

Expert has extended experience with nonlinear modeling of power converter circuits and control techniques, including current-mode control, average current mode control, and charge control. He has successfully developed small signal models for these control schemes, to facilitate design optimization.

power converting circuit modeling


power converting circuit control

Show Secondary and Basic Areas of Expertise
Expert may consult nationally and internationally, and is also local to the following cities: Greensboro, North Carolina;  Winston Salem, North Carolina;  High Point, North Carolina;  Roanoke, Virginia;  Lynchburg, Virginia;  and Charleston, West Virginia.

Often requested
with this expert:

Power Electronics and Renewable Energy Systems
Power Electronics
Power Electronics, Motor Drives, Renewable Energy, Etc.
Power Electronics (DC to 3 GHz), RF Power, Switching-Mode...

Year   Degree   Subject   Institution  
1974   PhD   Electrical Engineering   Duke University  
1972   MS   Electrical Engineering   Duke University  
1968   BS   Electrical Engineering   National Cheng Kung University - Taiwan  

Work History:
Years   Employer   Title  

1998 to






1995 to




Lewis A. Hester Chair of Engineering


1986 to


(Undisclosed University)


James S. Tucker Endowed Chair Professor


1987 to 1998


Technology Development Center For Power Electronics, Virginia Center For Innovative Technology




1985 to


(Undisclosed University)




1977 to 1986


(Undisclosed University)




1974 to 1977


TRW Defense and Space Systems, Control and Power Processing Department



Career Accomplishments:
Professional Appointments

Expert was the President of the IEEE Power Electronic Society from 1993-1995. He currently holds the Lewis A. Hester Engineering Chair. Expert is also a Fellow of the IEEE.


Expert is the recipient of many honors and awards, including the Outstanding Young Man of America (1979), Who's Who in the South and Southeast (1984), Ralph R. Teetor Educational Award, Society of Automotive Engineering (1985), James S. Tucker Endowed Chair Professor (1986), William E. Newell Outstanding Power Electronics Award (1989), PCIM Award for Leadership in Power Electronics Education (1990), and the Alumni Award for Research Excellence from Expert's Firm (1990). Expert also holds a number of Best Paper Awards from the IAS, the High-Frequency Power Converter Conference, and the Power Conversion International.

Publications and Patents Summary

Expert holds 15 U.S. patents and has published over 300 articles in the areas of power device and circuit modeling, analysis and design.

Selected Publications and Publishers  
 - IEEE Press on Power Electronics Technology Applications, Institute of Electrical and Electronics Engineers (IEEE)  
 - IEEE Transactions on Power Electronics, Institute of Electrical and Electronics Engineers (IEEE)  
 - IEEE PESC, Institute of Electrical and Electronics Engineers (IEEE)  
 - Institute of Electrical and Electronics Engineers (IEEE)  

Consulting Services:
Recent Client Requests:
  • DC circuit engineering expert for consulting on a DC to DC converter design prototype.
  • Power electronics expert for consulting on DC:DC boost converter battery charger.
  • Expert in contract designers for power electronics applications for consulting on Induction Heating Inverters for Billet Heating or Hardening.
  • Expert in remote electrical technology for consulting on failures to multiple variations of switches.
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.

Language Skills:
Foreign Language   Description
Chinese   Expert is Fluent in Chinese.


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