Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5315225 | Converter for synchronous motor starting | Colin D. Schauder | 1994-05-24 |
| 5291388 | Reconfigurable inverter apparatus for battery-powered vehicle drive | — | 1994-03-01 |
| 4849870 | Method of operating a-c drive with parallel connected d-c link power converters | — | 1989-07-18 |
| 4814964 | Variable speed a-c drive | Colin D. Schauder, John Rosa | 1989-03-21 |
| 4805082 | Regenerative two-quadrant converter | Colin D. Schauder | 1989-02-14 |
| 4788635 | Converter system combining a two-quadrant voltage-source rectifier and a four-quadrant voltage-source inverter, and a motor drive embodying the same | — | 1988-11-29 |
| 4750098 | Unrestricted frequency changer with current source output | Andress Kernick, Peter Wood | 1988-06-07 |
| 4697131 | Voltage source inverter and variable frequency, constant voltage AC motor drive embodying the same | Colin D. Schauder | 1987-09-29 |
| 4621231 | Toroidal sensor coil and method | Lawrence W. Frost | 1986-11-04 |
| 4596951 | Electronic circuit for measuring AC electrical energy | Raymond W. Mackenzie | 1986-06-24 |
| 4591810 | Pulse width modulator for electronic watthour metering | Raymond W. Mackenzie | 1986-05-27 |
| 4581696 | Control method and apparatus for a UFC for minimizing input current distortions | Laszlo Gyugyi, Gyu-Hyeong Cho | 1986-04-08 |
| 4578746 | Interlaced pulse-width modulated unrestricted frequency changer system | Laszlo Gyugyi, Gyu-Hyeong Cho | 1986-03-25 |
| 4471286 | Closed-loop frequency regulated generator apparatus | Shan C. Sun, Eugene L. Rodgers | 1984-09-11 |
| 4259620 | Low cost, variable speed, constant torque induction motor drive | Robert M. Oates | 1981-03-31 |
| 4182983 | Electronic AC electric energy measuring circuit | Joseph J. Zelezniak | 1980-01-08 |