| 11183869 |
System and method for generator frequency control during UPS power walk-in |
Terry D. Bush, Peter A. Panfil |
2021-11-23 |
| 10637279 |
Method of mitigating effects of AC input voltage surge in a transformer-less rectifier uninterruptible power supply system |
Xian Chen |
2020-04-28 |
| 10340733 |
3-wire transformer-free UPS system and method of control to reduce common mode current |
Edwin Shires, Terry D. Bush, Charles F. Blair |
2019-07-02 |
| 10277066 |
Method for balancing power in paralleled converters |
Terry D. Bush |
2019-04-30 |
| 10042007 |
Method for detecting a failing rectifier or rectifier source |
— |
2018-08-07 |
| 9876390 |
Techniques for improving operation of static transfer switches during voltage disturbances |
Terry D. Bush, Russell E. Shetler, Jr., Peter A. Panfil |
2018-01-23 |
| 9843188 |
Method to select optimal synchronization source in a multiple uninterruptible power supply system |
Xian Chen |
2017-12-12 |
| 9531288 |
Systems and methods for balancing UPS output voltages during transitions between operating modes |
Terry D. Bush, Russell E. Shetler, Jr. |
2016-12-27 |
| 9431854 |
Multiple UPS system having multi-way power tie system and intelligent power sharing control |
Xian Chen |
2016-08-30 |
| 8290103 |
Method for transmitting parallelization signals of uninterruptible power supplies |
Yihang Lu, Dangsheng Zhou, Zhihua Wang, Quanbo Xia, Bo Liu +2 more |
2012-10-16 |
| 8271146 |
Maximized battery run-time in a parallel UPS system |
Kevin Eschhofen, Mohammad Nanda Rahmana Marwali, Terry D. Bush |
2012-09-18 |
| 8060321 |
System and method for detecting an electrical short across a static switch of an uninterruptible power supply |
Jason D. Peltier |
2011-11-15 |
| 8035944 |
Power supply system with adaptive blown fuse detection using negative sequence component |
Xian Chen |
2011-10-11 |
| 7864552 |
Intelligent sensorless control of a phase controlled rectifier |
Xian Chen, Paul Taylor |
2011-01-04 |
| 7667351 |
Method for pulse width modulation synchronization in a parallel UPS system |
Mohammad Nanda Rahmana Marwali, Kevin Eschhofen |
2010-02-23 |
| 7668624 |
Maximized battery run-time in a parallel UPS system |
Kevin Eschhofen, Mohammad Nanda Rahmana Marwali, Terry D. Bush |
2010-02-23 |
| 7566988 |
Method and apparatus for monitoring UPS power sources |
Terry D. Bush, Mohammad Nanda Rahmana Marwali, Paul Taylor |
2009-07-28 |
| 7352082 |
Transfer switch device and method |
Mohammad Nanda Rahmana Marwali, Terry D. Bush, Jeffery Earl Grant Powell |
2008-04-01 |
| 6917124 |
Uninterruptible power supply |
Russell E. Shetler, Jr., Kevin Eschhofen, Ramesh Subramanian, Nelson John Norris, Ronald Richard Rautenstrauch +7 more |
2005-07-12 |
| 6318522 |
Rotary damper with magnetic seals |
Gary Lee Johnston, Michael Oliver, Richard E. Longhouse, William C. Kruckemeyer |
2001-11-20 |
| 6139460 |
Electric caliper |
David Drennen |
2000-10-31 |
| 6137257 |
Method for monitoring the position of a switched reluctance motor |
Scott Horning, Andrew Zup |
2000-10-24 |
