Lars Helle
47Patents
9h-index
53Co-inventors
78Inventor score
Filing activity: May 23, 2001 → Dec 27, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6566764B2 | Variable speed wind turbine having a matrix converter | Emerging Cross-Sectional Technologies | 158 | Expired |
| US6856038B2 | Variable speed wind turbine having a matrix converter | Emerging Cross-Sectional Technologies | 96 | Expired |
| US8198742B2 | Variable speed wind turbine with a doubly-fed induction generator and rotor and grid inverters that use scalar controls | Emerging Cross-Sectional Technologies | 25 | Active |
| US8049352B2 | Apparatus and method for controlling the reactive power from a cluster of wind turbines connected to a utility grid | Emerging Cross-Sectional Technologies | 15 | Active |
| US8395360B2 | Direct power and stator flux vector control of a generator for wind energy conversion system | Emerging Cross-Sectional Technologies | 14 | Active |
| US7830031B2 | Protection system for an electric generator, wind turbine and use hereof | Emerging Cross-Sectional Technologies | 13 | Active |
| US7966103B2 | Apparatus and method for operating a wind turbine under low utility grid voltage conditions | Emerging Cross-Sectional Technologies | 11 | Active |
| US8742609B2 | Power management during grid faults | Emerging Cross-Sectional Technologies | 9 | Active |
| US8994202B2 | Method and system for operating a wind turbine during an overvoltage event | Emerging Cross-Sectional Technologies | 9 | Active |
| US8884566B2 | Method of position sensorless control of an electrical machine | Electricity | 6 | Active |
| US7952346B2 | Method for estimating the magnetization level of one or more permanent magnets established in one or more permanent magnet rotors of a wind turbine generator and wind turbine | Emerging Cross-Sectional Technologies | 5 | Active |
| US8041466B2 | Method for operating a wind turbine connected to a utility grid during a utility disturbance, wind turbine and wind park | Emerging Cross-Sectional Technologies | 4 | Active |
| US7915762B2 | Method for controlling a cluster of wind turbines connected to a utility grid | Emerging Cross-Sectional Technologies | 4 | Active |
| US8970057B2 | Method of operating a wind turbine, wind turbine, wind turbine controlling system, and processing system | Emerging Cross-Sectional Technologies | 4 | Active |
| US9722520B2 | Direct power and stator flux vector control of a generator for wind energy conversion system | Emerging Cross-Sectional Technologies | 3 | Active |
| US8466661B2 | Low-voltage harmonic filter for full-scale converter systems | Emerging Cross-Sectional Technologies | 3 | Active |
| US11563385B2 | DC chopper for MMC cell with integrated chopper resistor | Emerging Cross-Sectional Technologies | 3 | Active |
| US11211878B2 | DC chopper for MMC cell with integrated chopper resistor | Emerging Cross-Sectional Technologies | 2 | Active |
| US9837824B2 | Connection system for power generation system with DC output | Emerging Cross-Sectional Technologies | 2 | Active |
| US8468681B2 | Establishing a wind turbine generator with one or more permanent magnet (PM) rotors | Emerging Cross-Sectional Technologies | 2 | Active |
| US9252601B2 | Method for controlling a power converter in a wind turbine generator | Emerging Cross-Sectional Technologies | 2 | Active |
| US9065329B2 | Reconfigurable power converter module | Emerging Cross-Sectional Technologies | 2 | Active |
| US11286904B2 | Method of controlling a wind turbine generator | Emerging Cross-Sectional Technologies | 1 | Active |
| US8759994B2 | Method of controlling a wind turbine generator and apparatus for controlling electric power generated by a wind turbine generator | Emerging Cross-Sectional Technologies | 1 | Active |
| US10763670B2 | Rotating transformer and inductive coupling | Emerging Cross-Sectional Technologies | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.