Allan B. Plunkett
25Patents
18h-index
13Co-inventors
78Inventor score
Filing activity: Nov 20, 1974 → Dec 22, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4928043A | Back EMF sampling circuit for phase locked loop motor control | Electricity | 118 | Expired |
| US4814677A | Field orientation control of a permanent magnet motor | Electricity | 113 | Expired |
| US4088934A | Means for stabilizing an a-c electric motor drive system | Emerging Cross-Sectional Technologies | 105 | Expired |
| US4047083A | Adjustable speed A-C motor drive with smooth transition between operational modes and with reduced harmonic distortion | Electricity | 95 | Expired |
| US4023083A | Torque regulating induction motor system | Electricity | 79 | Expired |
| US4093900A | Dynamic brake blending for an inverter propulsion system | Emerging Cross-Sectional Technologies | 75 | Expired |
| US4578610A | Synchronous disk motor with amorphous metal stator and permanent magnet rotor and flywheel | Electricity | 71 | Expired |
| US4684867A | Regenerative unipolar converter for switched reluctance motors using one main switching device per phase | Electricity | 56 | Expired |
| US4075538A | Adaptive acceleration responsive system | Emerging Cross-Sectional Technologies | 50 | Expired |
| US4088935A | Stabilizing scheme for an a-c electric motor drive system | Electricity | 35 | Expired |
| US4361791A | Apparatus for controlling a PWM inverter-permanent magnet synchronous motor drive | Electricity | 34 | Expired |
| US5909098A | Downhole pumping system with variable speed pulse-width modulated inverter coupled to electrical motor via non-gap transformer | Electricity | 32 | Expired |
| US4044285A | Method and apparatus for controlling variable speed, controlled current induction motor drive systems | Electricity | 30 | Expired |
| US4377779A | Pulse width modulated inverter machine drive | Electricity | 27 | Expired |
| US5844397A | Downhole pumping system with variable speed pulse width modulated inverter coupled to electrical motor via non-gap transformer | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4011489A | Apparatus for regulating magnetic flux in an AC motor | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4320331A | Transistorized current controlled pulse width modulated inverter machine drive system | Electricity | 22 | Expired |
| US4245181A | Method and apparatus for generating an air gap flux signal for an AC machine from AC line voltage and current values | Physics | 20 | Expired |
| US4255695A | Method and apparatus for control of inverter synchronous machine drive system | Electricity | 14 | Expired |
| US4215305A | Excitation commanding for current fed motor drives | Electricity | 14 | Expired |
| US4321478A | Auxiliary power supply with kinetic energy storage | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4258302A | Apparatus for maintaining synchronism of an inverter-synchronous machine drive system at light or zero machine loads | Electricity | 11 | Expired |
| US4473790A | Control circuit for suppression of line resonances in current feedback pulse width modulation control systems with a minimum d-c filter | Electricity | 9 | Expired |
| US4090119A | Torque analog of a series wound DC traction motor | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4044284A | Alternating current motor control method and system | Electricity | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.