Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8786232 | Thermal stress reduction in aircraft motor controllers | Huazhen Chai, Adam Michael White | 2014-07-22 |
| 8730686 | Dual-input nine-phase autotransformer for electric aircraft AC-DC converter | Frank Z. Feng, Waleed M. Said, John Huss | 2014-05-20 |
| 8614870 | Active transient current control in electronic circuit breakers | Huazhen Chai, Jeffrey T. Wavering | 2013-12-24 |
| 8120272 | AC delay angle control for energizing a lamp | Afroz M. Imam, Sivakumar Thangavelu | 2012-02-21 |
| 7944149 | Starting an electronic ballast | Afroz M. Imam, Sivakumar Thangavelu | 2011-05-17 |
| 7432663 | Circuit for igniting a high intensity discharge lamp | Young G. Kang, Sivakumar Thangavelu, Markus Ziegler | 2008-10-07 |
| 6392365 | Hot restrike protection circuit for self-oscillating lamp ballast | Rui Zhou, Louis R. Nerone, Weizhong Tang | 2002-05-21 |
| 6377461 | Power electronic module packaging | Burhan Ozmat, Eladio Clemente Delgado, Charles Steven Korman, Paul Alan McConnelee | 2002-04-23 |
| 6232151 | Power electronic module packaging | Burhan Ozmat, Eladio Clemente Delgado, Charles Steven Korman, Paul Alan McConnelee | 2001-05-15 |
| 5999424 | Bi-directional energy diode converter using multipulse control | Michael Joseph Schutten | 1999-12-07 |
| 5910709 | Florescent lamp ballast control for zero -voltage switching operation over wide input voltage range and over voltage protection | Ljubisa Dragoljub Stevanovic, Robert Louis Steigerwald | 1999-06-08 |
| 5898583 | Gate drive latching circuit for an auxiliary resonant commutation circuit | Eladio Clemente Delgado | 1999-04-27 |
| 5892673 | Robust, high-density, high-efficiency state sequence controller for an auxiliary resonant commutation pole power converter | Eladio Clemente Delgado | 1999-04-06 |
| 5517086 | Modified valley fill high power factor correction ballast | Sayed-Amr El-Hamamsy | 1996-05-14 |
| 5500791 | Power distribution system for generating regulated DC output voltages using a dual active bridge converter driven from an unregulated DC source | Michael Joseph Schutten | 1996-03-19 |
| 5488269 | Multi-resonant boost high power factor circuit | Sayed-Amr El-Hamamsy, David J. Kachmarik | 1996-01-30 |
| 5481161 | Variable frequency generator for resonant power feedback | Sayed-Amr El-Hamamsy | 1996-01-02 |
| 5481449 | Efficient, high power density, high power factor converter for very low dc voltage applications | Robert Louis Steigerwald | 1996-01-02 |
| 5355294 | Unity power factor control for dual active bridge converter | Rik W. De Doncker | 1994-10-11 |
| 5283727 | Independent control of the AC line current and output DC voltage of a high power factor AC-to-DC converter | Robert Louis Steigerwald | 1994-02-01 |
| 5027264 | Power conversion apparatus for DC/DC conversion using dual active bridges | Rik Wivina Anna Adelson DeDoncker, Deepakraj M. Divan | 1991-06-25 |