| 5909098 |
Downhole pumping system with variable speed pulse-width modulated inverter coupled to electrical motor via non-gap transformer |
Karl Konecny, Kelly Ray Packard, Jacqueline Rae Akerson |
1999-06-01 |
| 5844397 |
Downhole pumping system with variable speed pulse width modulated inverter coupled to electrical motor via non-gap transformer |
Karl Konecny, Kelly Ray Packard, Jacqueline Rae Akerson |
1998-12-01 |
| 4928043 |
Back EMF sampling circuit for phase locked loop motor control |
— |
1990-05-22 |
| 4814677 |
Field orientation control of a permanent magnet motor |
— |
1989-03-21 |
| 4684867 |
Regenerative unipolar converter for switched reluctance motors using one main switching device per phase |
Timothy J. Miller, Robert Louis Steigerwald |
1987-08-04 |
| 4578610 |
Synchronous disk motor with amorphous metal stator and permanent magnet rotor and flywheel |
Gerald Burt Kliman |
1986-03-25 |
| 4473790 |
Control circuit for suppression of line resonances in current feedback pulse width modulation control systems with a minimum d-c filter |
John D. D'Atre, Allen Michael Ritter, Luis Jose Garces |
1984-09-25 |
| 4377779 |
Pulse width modulated inverter machine drive |
— |
1983-03-22 |
| 4361791 |
Apparatus for controlling a PWM inverter-permanent magnet synchronous motor drive |
— |
1982-11-30 |
| 4321478 |
Auxiliary power supply with kinetic energy storage |
Fred G. Turnbull |
1982-03-23 |
| 4320331 |
Transistorized current controlled pulse width modulated inverter machine drive system |
— |
1982-03-16 |
| 4258302 |
Apparatus for maintaining synchronism of an inverter-synchronous machine drive system at light or zero machine loads |
— |
1981-03-24 |
| 4255695 |
Method and apparatus for control of inverter synchronous machine drive system |
Fred G. Turnbull |
1981-03-10 |
| 4245181 |
Method and apparatus for generating an air gap flux signal for an AC machine from AC line voltage and current values |
— |
1981-01-13 |
| 4215305 |
Excitation commanding for current fed motor drives |
John D. D'Atre |
1980-07-29 |
