Issued Patents All Time
Showing 1–25 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10491149 | Acceleration estimator for speed rate control | — | 2019-11-26 |
| 10199973 | Acceleration estimator for speed rate control | — | 2019-02-05 |
| 8693227 | Inverter control when feeding high impedance loads | James A. Ulrich | 2014-04-08 |
| 8120932 | Low voltage ride through | Douglas C. Folts, Michael P. Ross | 2012-02-21 |
| 7778053 | Power system having a voltage regulator with a notch filter | — | 2010-08-17 |
| 6977827 | Power system having a phase locked loop with a notch filter | — | 2005-12-20 |
| 6621291 | Device and method for estimating the resistance of a stator winding for an AC induction motor | Sang-Bin Lee, Thomas G. Habetler | 2003-09-16 |
| 6611771 | Method and apparatus to detect a stator turn fault in an AC motor | Thomas G. Habetler, Ronald G. Harley, Rangarajan M. Tallam | 2003-08-26 |
| 6420848 | Method and controlling the starting of an AC induction motor with closed loop current control | Dora Yuan Wang | 2002-07-16 |
| 6407529 | Method for controlling the starting of an induction motor utilizing closed loop alpha control | Dora Yuan Wang | 2002-06-18 |
| 6380708 | Method for controlling the starting of an AC induction motor | Dora Yuan Wang | 2002-04-30 |
| 6356423 | Soild state protection circuit for electrical apparatus | Jerome K. Hastings, Karen Sjaarda Bland, James E. Hansen, Scott A. Reid, Edward L. Wellner +4 more | 2002-03-12 |
| 5633790 | DV/DT limiting of inverter output voltage | Jeffrey A. Reichard | 1997-05-27 |
| 5537308 | Digital current regulator | — | 1996-07-16 |
| 5461296 | Bumpless rotating start | David M. Messersmith | 1995-10-24 |
| 5386186 | Stator flux oriented control | — | 1995-01-31 |
| 5045988 | Isolated adjustable frequency AC inverter control | Michael A. Shanblatt, Elias G. Strangas | 1991-09-03 |
| 4994950 | Waveform generator for inverter control | — | 1991-02-19 |
| 4990844 | DC braking of inverter-driven AC motors | David M. Messersmith | 1991-02-05 |
| 4958269 | Current control for microprocessor motor drive | — | 1990-09-18 |
| 4825132 | Current mode motor control | — | 1989-04-25 |
| 4757225 | Dual stack tachometer/generator | John H. Wolcott | 1988-07-12 |
| 4749876 | Universal power transistor base drive control unit | Allan Roy Gale | 1988-06-07 |
| 4698562 | Motor electrical positioning system and the application thereof within vehicle traction drives | Allan Roy Gale | 1987-10-06 |
| 4651066 | Ferrite permanent magnet electrical machine and the application thereof within vehicle traction drives | Walter K. O'Neil, David Turner | 1987-03-17 |