Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |