Expert Details
Power Electronics, Power Supplies
ID: 716404
Virginia, USA
Expert is proficient in magnetic material loss characterization and design considerations when applied to high-frequency inductor and transformer design for power conversion equipment.
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.
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.
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.
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.
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.
Education
| Year | Degree | Subject | Institution |
|---|---|---|---|
| Year: 1974 | Degree: PhD | Subject: Electrical Engineering | Institution: Duke University |
| Year: 1972 | Degree: MS | Subject: Electrical Engineering | Institution: Duke University |
| Year: 1968 | Degree: BS | Subject: Electrical Engineering | Institution: National Cheng Kung University - Taiwan |
Work History
| Years | Employer | Title | Department |
|---|---|---|---|
| Years: 1998 to Present | Employer: Undisclosed | Title: Director | Department: |
Responsibilities:Available upon request. |
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| Years | Employer | Title | Department |
| Years: 1995 to Present | Employer: Undisclosed | Title: Lewis A. Hester Chair of Engineering | Department: |
Responsibilities:Available upon request. |
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| Years | Employer | Title | Department |
| Years: 1986 to Present | Employer: Undisclosed | Title: James S. Tucker Endowed Chair Professor | Department: |
Responsibilities:Available upon request. |
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| Years | Employer | Title | Department |
| Years: 1987 to 1998 | Employer: Technology Development Center For Power Electronics, Virginia Center For Innovative Technology | Title: Director | Department: |
Responsibilities:Available upon request. |
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| Years | Employer | Title | Department |
| Years: 1985 to Present | Employer: Undisclosed | Title: Director | Department: |
Responsibilities:Available upon request. |
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| Years | Employer | Title | Department |
| Years: 1977 to 1986 | Employer: Virginia Polytechnic Institute and State University | Title: Faculty | Department: |
Responsibilities:Available upon request. |
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| Years | Employer | Title | Department |
| Years: 1974 to 1977 | Employer: TRW Defense and Space Systems, Control and Power Processing Department | Title: | Department: |
Responsibilities:Available upon request. |
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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. |
| Awards / Recognition |
|---|
| 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 Virginia Tech (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. |
Language Skills
| Language | Proficiency |
|---|---|
| Chinese | Expert is Fluent in Chinese. |
Fields of Expertise
power semiconductor device, semiconductor strength, magnetics, power inductor, high-frequency electric power converter, distributed electric power supply system, power-supply circuit, switched-mode power supply circuit, power electronics, power quality, space power system, power converting circuit modeling, power converting circuit control, DC-to-DC converter, DC to DC conversion, resonant transition power converter, alternating-current to alternating-current converter, alternating-current to direct-current converter, alternating-current to alternating-current conversion, direct-current to alternating-current converter, high-voltage power supply circuit, electric-power conversion, direct-current to alternating-current conversion, high-frequency link converter, alternating-current transformer, alternating-current to direct-current conversion, alternating-current frequency converter, high-voltage transformer, silicon-controlled rectifier, single-phase rectifier, junction transistor, electronic rectifying element, nonlinear control, overload protection, synchronous inverter, uninterruptible power system, transistor, spacecraft, solid-state rectifier, silicon rectifier, semiconductor diode, semiconductor device, power transistor, overvoltage protection, magnetic material, junction field-effect transistor, half-wave rectifier, full-wave rectifier, field-effect transistor, control theory, bipolar transistor, battery charger, aerospace engineering