Loren H. Walker
57Patents
19h-index
26Co-inventors
84Inventor score
Filing activity: Nov 22, 1974 → Sep 13, 1994
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5041959A | Control system for a current source converter supplying an AC bus | Electricity | 73 | Expired |
| US4060752A | Discharge lamp auxiliary circuit with dI/dt switching control | Emerging Cross-Sectional Technologies | 68 | Expired |
| US4475150A | Coordinated load commutated inverter protection system | Electricity | 51 | Expired |
| US4230979A | Controlled current inverter and motor control system | Electricity | 50 | Expired |
| US4281276A | Dual mode AC motor drive system | Electricity | 48 | Expired |
| US4227138A | Reversible variable frequency oscillator for smooth reversing of AC motor drives | Electricity | 30 | Expired |
| US3940682A | Rectifier circuits using transistors as rectifying elements | Electricity | 27 | Expired |
| US5621599A | Switched MOV device | Electricity | 26 | Expired |
| US4071812A | AC Inverter with constant power output | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4496899A | Control for a force commutated current source var generator | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4237531A | Controlled current inverter system having semiconductor overvoltage protection | Electricity | 23 | Expired |
| US5338994A | Method and apparatus for achieving current balance in parallel connected switching devices | Electricity | 23 | Expired |
| US4545002A | Thyristor voltage limiter for current source inverter | Electricity | 22 | Expired |
| US4276510A | Apparatus for sensing current transformer primary current as a function of differential core inductance | Electricity | 22 | Expired |
| US4609990A | Frequency measurement system | Physics | 21 | Expired |
| US4449087A | Flux feedback firing control for a load commutated inverter | Electricity | 21 | Expired |
| US5070440A | Power conversion scheme employing paralleled units | Electricity | 20 | Expired |
| US4314190A | Controlled current inverter with angle command limit | Electricity | 19 | Expired |
| US4004187A | Push-pull inverter ballast for arc discharge lamps | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4311951A | Apparatus and method for high slip operation of an AC electric motor at substantially zero rotation and substantially zero torque | Electricity | 18 | Expired |
| US4994981A | Method and apparatus for controlling a power converter | Electricity | 17 | Expired |
| US4183081A | Inverter system including commutation failure prevention scheme | Electricity | 16 | Expired |
| US4280085A | Apparatus and method for providing a signal proportional to flux in an AC motor for control of motor drive current | Electricity | 16 | Expired |
| US4238821A | Method and apparatus for a variable frequency inverter system having commutation fault detection and correction capabilities | Electricity | 16 | Expired |
| US4253047A | Starting electrodes for solenoidal electric field discharge lamps | Electricity | 16 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.