Philip T. Krein
41Patents
23h-index
29Co-inventors
85Inventor score
Filing activity: Aug 26, 1986 → Dec 8, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5801519A | Self-excited power minimizer/maximizer for switching power converters and switching motor drive applications | Emerging Cross-Sectional Technologies | 367 | Expired |
| US7945413B2 | Voltage-sensed system and method for anti-islanding protection of grid-connected inverters | Electricity | 199 | Active |
| US5710504A | Switched capacitor system for automatic battery equalization | Emerging Cross-Sectional Technologies | 173 | Expired |
| US7078883B2 | Method and apparatus for starting power converters | Emerging Cross-Sectional Technologies | 173 | Expired |
| US4707845A | Touch panel with automatic nulling | Physics | 150 | Expired |
| US4698460A | Touch panel system | Physics | 126 | Expired |
| US8284574B2 | Method and apparatus for controlling an inverter using pulse mode control | Emerging Cross-Sectional Technologies | 107 | Active |
| US4698461A | Touch panel with automatic frequency control | Physics | 102 | Expired |
| US5668464A | Feedforward active filter for output ripple cancellation in switching power converters | Physics | 76 | Expired |
| US9143053B1 | Microinverters for employment in connection with photovoltaic modules | Emerging Cross-Sectional Technologies | 60 | Active |
| US7663342B2 | Apparatus, system, and method for controlling multiple power supplies | Electricity | 57 | Active |
| US8279642B2 | Apparatus for converting direct current to alternating current using an active filter to reduce double-frequency ripple power of bus waveform | Electricity | 51 | Active |
| US6700803B2 | Systems and methods for pulse width modulation | Electricity | 39 | Expired |
| US8350411B2 | Modular system for unattended energy generation and storage | Electricity | 32 | Active |
| US7994657B2 | Modular system for unattended energy generation and storage | Electricity | 32 | Active |
| US8482947B2 | Apparatus and method for controlling DC-AC power conversion | Electricity | 27 | Active |
| US8325499B2 | Methods for minimizing double-frequency ripple power in single-phase power conditioners | Emerging Cross-Sectional Technologies | 26 | Active |
| US9093919B2 | Apparatus for converting direct current to alternating current using a frequency converter | Electricity | 25 | Active |
| US8842454B2 | Inverter array with localized inverter control | Emerging Cross-Sectional Technologies | 24 | Active |
| US7755916B2 | Methods for minimizing double-frequency ripple power in single-phase power conditioners | Emerging Cross-Sectional Technologies | 24 | Active |
| US8737100B2 | Method and apparatus for controlling an inverter using pulse mode control | Emerging Cross-Sectional Technologies | 24 | Active |
| US7681090B2 | Ripple correlation control based on limited sampling | Electricity | 23 | Active |
| US7982434B2 | Apparatus and method for controlling a power supply | Electricity | 23 | Active |
| US8004865B2 | Methods for minimizing double-frequency ripple power in single-phase power conditioners | Emerging Cross-Sectional Technologies | 21 | Active |
| US8423312B2 | Voltage-sensed system and method for anti-islanding protection of grid-connected inverters | Electricity | 21 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.