Issued Patents All Time
Showing 25 most recent of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11545921 | Active damping of mechanical drivetrain oscillations using generator voltage regulator | — | 2023-01-03 |
| 9543876 | Three phase flux switching generator in a three stage wound field synchronous machine | Dhaval Patel, David A. Fox, Jason A. Ohnemus | 2017-01-10 |
| 9374027 | Sensorless rotor position determination for a wound field synchronous machine | — | 2016-06-21 |
| 8593095 | Wound field synchronous machine rotor tracking using a carrier injection sensorless signal and exciter current | Dhaval Patel | 2013-11-26 |
| 8362728 | Rotor position detection at standstill and low speeds using a PMG to operate a wound field synchronous machine | Dhaval Patel, Michael C. Harke | 2013-01-29 |
| 8217630 | Electric load damper for damping torsional oscillation | Vijay K. Madalli, Donal E. Baker, John Duward Sagona | 2012-07-10 |
| 8169172 | Synchronous disturbance suppression in a variable speed motor drive | James J. Wrobel | 2012-05-01 |
| 8056417 | Torque oscillation monitoring | Vijay K. Maddali | 2011-11-15 |
| 7884581 | Active damping for synchronous generator torsional oscillations | Vijay K. Maddali | 2011-02-08 |
| 7808215 | Active damping for synchronous generator torsional oscillations | Vijay K. Maddali | 2010-10-05 |
| 7583046 | Rotor position detection at standstill and low speeds using a low power permanent magnet machine | Vijay K. Maddali | 2009-09-01 |
| 7265507 | Angular position and velocity estimation for synchronous machines based on extended rotor flux | — | 2007-09-04 |
| 7132816 | Brushless wound field synchronous machine rotor position tracking with exciter stator current harmonic tracking | Charles J. Romenesko | 2006-11-07 |
| 7072790 | Shaft sensorless angular position and velocity estimation for a dynamoelectric machine based on extended rotor flux | Jun Hu, Charles J. Romenesko | 2006-07-04 |
| 7034497 | Carrier injection sensorless control of aircraft variable frequency wound field synchronous starter/generators | Vijay K. Maddali, William J. Peterson, Charles J. Romenesko | 2006-04-25 |
| 6967461 | North-south pole determination for carrier injection sensorless position sensing systems | John F. Defenbaugh, Michael C. Harke, Charles J. Romenesko, Daniel M. Saban | 2005-11-22 |
| 5747971 | Position and velocity sensorless control for a motor generator system operated as a motor using exciter impedance | Gregory I. Rozman, Michael J. Hanson, Leland E. Weber | 1998-05-05 |
| 5594322 | Starter/generator system with variable-frequency exciter control | Gregory I. Rozman, Paul E. Nuechterlein | 1997-01-14 |
| 5581168 | Starter/generator system with DC link current control | Gregory I. Rozman, Alexander Cook, Vietson M. Nguyen | 1996-12-03 |
| 5495163 | Control for a brushless generator operable in generating and starting modes | Gregory I. Rozman, Michael J. Hanson | 1996-02-27 |
| 5495162 | Position-and-velocity sensorless control for starter generator electrical system using generator back-EMF voltage | Gregory I. Rozman, Michael J. Hanson, Leland E. Weber | 1996-02-27 |
| 5493200 | Control for a brushless generator | Gregory I. Rozman, James A. Shippling | 1996-02-20 |
| 5488286 | Method and apparatus for starting a synchronous machine | Gregory I. Rozman, Michael J. Hanson, Leland E. Weber | 1996-01-30 |
| 5461293 | Rotor position detector | Gregory I. Rozman, Leland E. Weber | 1995-10-24 |
| 5444349 | Starting control for an electromagnetic machine | Gregory I. Rozman, Michael J. Hanson | 1995-08-22 |