Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5852553 | Harmonic neutralized voltage sourced inverter employing phase shifting interphase transformers | — | 1998-12-22 |
| 5798916 | High power inverter pole employing series connected devices configured for reduced stray loop inductance | George S. Bettencourt | 1998-08-25 |
| 5712587 | Apparatus and method for simultaneously deactivating series-connected switching devices | Colin D. Schauder, Mark G. Gernhardt | 1998-01-27 |
| 5703767 | Apparatus and method to prevent saturation of interphase transformers | — | 1997-12-30 |
| 5554952 | Fast responding method and apparatus for three phase A/C voltage sensing | — | 1996-09-10 |
| 5515264 | Optimized high power voltage sourced inverter system | — | 1996-05-07 |
| 5337227 | Harmonic neutralization of static inverters by successive stagger | John Rosa | 1994-08-09 |
| 5168437 | Phase displaced, multiple inverter bridge circuits with waveform notching for harmonic elimination | Laszlo Gyugyi | 1992-12-01 |
| 5140245 | PMG-based position sensor and synchronous drive incorporating same | — | 1992-08-18 |
| 5113125 | AC drive with optimized torque | — | 1992-05-12 |
| 5047915 | Unrestricted frequency converter for unbalanced loads | Geoffrey M. Smith, Thomas H. Putman, Laszlo Gyugyi | 1991-09-10 |
| 4991429 | Torque angle and peak current detector for synchronous motors | Geoffrey M. Smith | 1991-02-12 |
| 4963839 | Wide bandwidth phase locked loop circuit with sliding window averager | — | 1990-10-16 |
| 4935686 | Ac motor drive with switched autotransformer coupling | — | 1990-06-19 |
| 4870557 | Simplified quasi-harmonic neutralized high power inverters | — | 1989-09-26 |
| 4766359 | Absolute shaft position sensing circuit | Geoffrey M. Smith | 1988-08-23 |
| 4757415 | Power active filter employing positive sequence filtering | Geoffrey M. Smith | 1988-07-12 |
| 4698740 | Current fed regulated voltage supply | Eugene L. Rodgers | 1987-10-06 |
| 4669024 | Multiphase frequency selective phase locked loop with multiphase sinusoidal and digital outputs | — | 1987-05-26 |
| 4651265 | Active power conditioner system | Michael B. Brennen | 1987-03-17 |
| 4613932 | Method and circuit for reduction of stress in thyristors operating in the individual emergency firing mode | Frank Cibulka | 1986-09-23 |
| 4597038 | Switching overlap protection by control gate impedance monitoring | — | 1986-06-24 |
| 4479160 | Band-pass sequence filters for symmetrical components of multiphase AC power systems | — | 1984-10-23 |
| 4439823 | Converting multiphase power from one frequency to another using current waveforms | Laszlo Gyugyi, Geoffrey M. Smith | 1984-03-27 |
| 4398141 | Static VAR generators | Michael B. Brennen, Laszlo Gyugyi | 1983-08-09 |