Issued Patents All Time
Showing 1–25 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11976376 | Adjustable AC/DC conversion topology to regulate an isolated DC load with low AC ripple | Nickolay N. Guskov, Zhijun Liu, William John Sarver | 2024-05-07 |
| 11652421 | Method and apparatus to mitigate DC bus over-voltages on common AC bus systems utilizing DC and AC drives | Zhijun Liu | 2023-05-16 |
| 11387761 | System and method for sinusoidal output and integrated EMC filtering in a motor drive | Zoran Vrankovic, Gennadi Sizov, David A. Figie, Yao Da, Todd M. Oestreich +1 more | 2022-07-12 |
| 11342861 | Method and apparatus to mitigate DC bus over-voltages on common AC bus systems utilizing DC and AC drives | Zhijun Liu | 2022-05-24 |
| 11283388 | Voltage rotator for high switching frequency PWM inverter | Gennadi Sizov, Zoran Vrankovic, Todd M. Oestreich | 2022-03-22 |
| 11233475 | DC bus precharge system | James J Valasek, Nickolay N. Guskov | 2022-01-25 |
| 11031897 | Method and apparatus for mitigation of DC bus pump-up | Peter K. Meyer, Gennadi Sizov, Zoran Vrankovic | 2021-06-08 |
| 10947636 | Adjustable AC/DC conversion topology to regulate an isolated DC load with low AC ripple | Nickolay N. Guskov, Zhijun Liu, William Jonn Sarver | 2021-03-16 |
| 10879826 | System and method for sinusoidal output and integrated EMC filtering in a motor drive | Zoran Vrankovic, Gennadi Sizov, David A. Figie, Yao Da, Todd M. Oestreich +1 more | 2020-12-29 |
| 10629396 | Arc flash resistant enclosure with segregated cooling | Nickolay N. Guskov, Steven J. Krautkramer, Jesus Mariscal, James P. Clavette, Zhijun Liu | 2020-04-21 |
| 10317289 | Thermal well for transformer and methods | Jeffrey R. Annis | 2019-06-11 |
| 9621094 | Method and apparatus for reducing radiated emissions in switching power converters | Zoran Vrankovic, Craig R. Winterhalter | 2017-04-11 |
| 9612269 | System for detection of a ground fault in a high resistance ground network | Lixiang Wei, Zhijun Liu, Brian P. Brown, David W. Kirschnik, Russ J. Kerkman +2 more | 2017-04-04 |
| 8970148 | Method and apparatus for reducing radiated emissions in switching power converters | Zoran Vrankovic, Craig R. Winterhalter | 2015-03-03 |
| 8841917 | Ground scheme identification method | Lixiang Wei, David W. Kirschnik, Richard A. Lukaszewski | 2014-09-23 |
| 8698504 | System for detection of a ground fault in a high resistance ground network | Lixiang Wei, Zhijun Liu, Brian P. Brown, David W. Kirschnik, Russ J. Kerkman +2 more | 2014-04-15 |
| 8593150 | Method and apparatus for detecting a location of ground faults in a motor/motor drive combination | Zoran Vrankovic, Lixiang Wei, Craig R. Winterhalter | 2013-11-26 |
| 8570773 | Power converter system and method | Ahmed Mohamed Sayed Ahmed | 2013-10-29 |
| 8395469 | Multi-phase transformer | Lixiang Wei | 2013-03-12 |
| 8373406 | Electrical power quality test circuitry and method | Ahmed Mohamed Sayed Ahmed, Richard A. Lukaszewski | 2013-02-12 |
| 8339820 | Thirty-six pulse power transformer and power converter incorporating same | Lixiang Wei | 2012-12-25 |
| 8299732 | Power conversion system and method | Frederick L. Hoadley | 2012-10-30 |
| 8243481 | Power transformer and power converter incorporating same | Lixiang Wei | 2012-08-14 |
| 8233258 | DC bus clamp circuit to prevent over voltage failure of adjustable speed drives | Lixiang Wei, Zhijun Liu | 2012-07-31 |
| 8174810 | Method and apparatus for reducing differential mode and common mode reflections in motor drives | Rangarajan M. Tallam | 2012-05-08 |