Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12422484 | Detecting welded relay contacts using electrical pulse | David Elmiger, Kyle B. Adkins, Andrew E. Carlson | 2025-09-23 |
| 12416672 | Detecting welded relay contacts using contact close time measurement | David Elmiger, Kyle B. Adkins, Andrew E. Carlson | 2025-09-16 |
| 12347636 | Systems and methods for detecting welded contacts in a switch system | David Elmiger, Kyle B. Adkins, Andrew E. Carlson | 2025-07-01 |
| 11901145 | Systems and methods for detecting welded contacts in an electromagnetic switch system | Kyle B. Adkins, Andrew E. Carlson, David Elmiger | 2024-02-13 |
| 11830693 | Predicting zero-crossings for point-on-wave (POW) switching techniques | Kyle B. Adkins, Andrew E. Carlson | 2023-11-28 |
| 11676786 | Systems and methods for controlling contactor open time | Andrew E. Carlson, Kyle B. Adkins | 2023-06-13 |
| 11114842 | Dual PWM relay driver with diagnostics for functional safety system | Yanbin Zhang, Yutao Wang, David Berman | 2021-09-07 |
| 10958062 | Systems and methods for dynamically switching a load of a current transformer circuit | Andrew E. Carlson, Daniel J. Bolda, Joseph A. Johnson | 2021-03-23 |
| 9880223 | Parameter estimation system and method for an induction motor | Douglas J. Bader, Haihui Lu, Thomas A. Nondahl, Zhenhuan Yuan | 2018-01-30 |
| 9685898 | Quasi vector motor controller | Kun Wei, Haihui Lu, Andrew J. Jaap, Randall S. Langer, Ping Lee | 2017-06-20 |
| 9518570 | Motor winding heater systems and methods | Andrew J. Jaap | 2016-12-13 |
| 9350275 | Quasi variable frequency motor controller | Kun Wei, Haihui Lu, Andrew J. Jaap, Randall S. Langer, Ping Lee | 2016-05-24 |
| 8742767 | Parameter estimation system and method for an induction motor | Douglas J. Bader, Haihui Lu, Thomas A. Nondahl, Zhenhuan Yuan | 2014-06-03 |
| 8547050 | Control method and system with feedback indicative of load flux | Haihui Lu, Thomas A. Nondahl | 2013-10-01 |
| 8519662 | Method and apparatus for controlling motor torque | Haihui Lu | 2013-08-27 |
| 8203304 | Control method and system with feedback indicative of load flux | Haihui Lu, Thomas A. Nondahl | 2012-06-19 |
| 8138709 | Control method and system | John Herman Blakely | 2012-03-20 |
| 7672096 | Switching apparatus and method | Thomas A. Nondahl | 2010-03-02 |
| 7538507 | System and method for transient-based motor speed estimation with transient excitation | Haihui Lu, Thomas A. Nondahl | 2009-05-26 |
| 7227326 | System and method for transient-based motor speed estimation with transient excitation | Haihui Lu, Thomas A. Nondahl | 2007-06-05 |
| 6803741 | Motor controller | — | 2004-10-12 |
| 6076805 | Rope pulling device | — | 2000-06-20 |
| 5461296 | Bumpless rotating start | David J. Gritter | 1995-10-24 |
| 4990844 | DC braking of inverter-driven AC motors | David J. Gritter | 1991-02-05 |