Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8203304 | Control method and system with feedback indicative of load flux | Haihui Lu, David M. Messersmith | 2012-06-19 |
| 8159168 | Rotor position estimator for an electrical machine | Jingbo Liu, Peter B. Schmidt, Semyon Royak, Mark H. Harbaugh | 2012-04-17 |
| 7944164 | Method and apparatus for identifying orientation of a stationary rotor in a sensor-less PMSM | Jingbo Liu, Peter B. Schmidt, Semyon Royak, Mark M. Harbaugh | 2011-05-17 |
| 7915852 | Universal adaptive torque control for PM motors for field-weakening region operation | Semyon Royak, Mark M. Harbaugh, Robert J. Breitzmann, Peter B. Schmidt, Jingbo Liu | 2011-03-29 |
| 7868581 | Induction motor analysis and control method | Wei Qian, Haihui Lu | 2011-01-11 |
| 7701165 | Induction motor controller | Wei Quian, Haihui Lu | 2010-04-20 |
| 7672096 | Switching apparatus and method | David M. Messersmith | 2010-03-02 |
| 7609014 | System and method for universal adaptive torque control of permanent magnet motors | Semyon Royak, Jingbo Liu, Peter B. Schmidt, Mark M. Harbaugh, Robert John Breitzman | 2009-10-27 |
| 7538507 | System and method for transient-based motor speed estimation with transient excitation | Haihui Lu, David M. Messersmith | 2009-05-26 |
| 7358700 | Induction motor controller | Wei Qian, Haihui Lu | 2008-04-15 |
| 7227326 | System and method for transient-based motor speed estimation with transient excitation | Haihui Lu, David M. Messersmith | 2007-06-05 |
| 7215559 | Method and apparatus to reduce common mode voltages applied to a load by a drive | Rajendra Naik, Rangarajan M. Tallam | 2007-05-08 |
| 6504275 | Electric motor having rotor-embedded sensor | Perry A. DelVecchio | 2003-01-07 |
| 6218749 | Electric motor having rotor-embedded sensor | Perry A. DelVecchio | 2001-04-17 |
| 6172498 | Method and apparatus for rotor angle detection | Peter B. Schmidt, Michael L. Gasperi | 2001-01-09 |
| 5347277 | Dual phase resolver to digital converter | Robert L. Pitsch, David M. Brod | 1994-09-13 |
| 4490780 | Digital power converter | — | 1984-12-25 |
| 4405873 | Rotor for a line-start permanent-magnet motor | — | 1983-09-20 |
| 4385251 | Flux shield for an inductor-alternator machine | John A. Mallick, Eike Richter | 1983-05-24 |