Issued Patents All Time
Showing 25 most recent of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11095202 | Method and apparatus for common-mode voltage cancellation | Cong Li, Di Pan, Ren Xie | 2021-08-17 |
| 10404186 | Power module systems and methods having reduced common mode capacitive currents and reduced electromagnetic interference | Fengfeng Tao, Maja Harfman-Todorovic, Ravisekhar Nadimpalli Raju, Philip Michael Cioffi, Ljubisa Dragoljub Stevanovic | 2019-09-03 |
| 9974201 | High power feedthrough for use with a high frequency power converter | Robert J. Thomas, Maja Harfman Todorovic | 2018-05-15 |
| 9722595 | Ultra high performance silicon carbide gate drivers | Fengfeng Tao, Jeffrey Joseph Nasadoski, Maja Harfman-Todorovic, John Stanley Glaser | 2017-08-01 |
| 9343939 | Electric motor structure to minimize electro-magnetic interference | Manoj Ramprasad Shah, Satish Prabhakaran, Robert J. Thomas | 2016-05-17 |
| 8675379 | Power converting apparatus having improved electro-thermal characteristics | Joseph Lucian Smolenski, Eladio Clemente Delgado, Richard Alfred Beaupre | 2014-03-18 |
| 8324980 | Electromagnetic interference mitigation system and method | Rajib Datta, Joseph Taher Mossoba | 2012-12-04 |
| 8208274 | Alternating current to direct current power conversion | Ravisekhar Nadimpalli Raju, Luis Jose Garces, Robert Louis Steigerwald | 2012-06-26 |
| 7912328 | Optical waveguide EMI shield | Glen Peter Koste, Arthur Vorwerk Radun | 2011-03-22 |
| 7869237 | Phase-shifted bridge with auxiliary circuit to maintain zero-voltage-switching | Robert Louis Steigerwald | 2011-01-11 |
| 7859870 | Voltage clamps for energy snubbing | Robert Louis Steigerwald | 2010-12-28 |
| 7741591 | Optically powered drive circuit and method for controlling a semiconductor switch | Robert Louis Steigerwald, Glen Peter Koste, Jeffrey Joseph Nasadoski | 2010-06-22 |
| 7672147 | High attenuation filtering circuit for power converters | Jeffrey Joseph Nasadoski, John Stanley Glaser, Michael A. de Rooij | 2010-03-02 |
| 7609532 | Phase-shifted PWM bridge with switchable inductors to maintain zero-voltage switching at light load | Robert Louis Steigerwald | 2009-10-27 |
| RE40907 | Ripple cancellation circuit for ultra-low-noise power supplies | Robert Louis Steigerwald | 2009-09-08 |
| 7449668 | Optically powered drive circuit and method for controlling a semiconductor switch | Robert Louis Steigerwald, Glen Peter Koste, Jeffrey Joseph Nasadoski | 2008-11-11 |
| 7327024 | Power module, and phase leg assembly | Ljubisa Dragoljub Stevanovic, Eladio Clementa Delgado, Richard Alfred Beaupre, Michael A. de Rooij | 2008-02-05 |
| 7142440 | Ripple-current reduction for transformers | Michael A. de Rooij, Robert Louis Steigerwald | 2006-11-28 |
| 7016205 | Ripple-current reduction schemes for AC converters | Robert Louis Steigerwald, Richard S. Zhang, Andrew Michael De Rooij | 2006-03-21 |
| 6930483 | Method/system for switched frequency ripple reduction in MRI gradient coils | Juan Antonio Sabate, Robert Louis Steigerwald | 2005-08-16 |
| 6693805 | Ripple cancellation circuit for ultra-low-noise power supplies | Robert Louis Steigerwald | 2004-02-17 |
| 6583705 | High current inductor and method for making same | Robert Louis Steigerwald, William George Earls | 2003-06-24 |
| 6242925 | EMI susceptibility testing apparatus and method | William George Earls | 2001-06-05 |
| 6239466 | Insulated gate bipolar transistor for zero-voltage switching | Ahmed Elasser | 2001-05-29 |
| 6178099 | Optimal phase-shifted control for a series resonant converter | Vlatko Vlatkovic, William F. Wirth | 2001-01-23 |