Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12372560 | Providing a frequency of an electrical quantity in an electrical power system | — | 2025-07-29 |
| 10962604 | Arrangement for injection-based ground fault protection handling | Stefan Roxenborg, Zoran Gajic, Mikael Sehlstedt | 2021-03-30 |
| 10809289 | Method and device for determining capacitive component parameters | Nilanga Abeywickrama, Jonas Hedberg | 2020-10-20 |
| 10473707 | Monitoring a transformer comprising a tap changer | Nilanga Abeywickrama | 2019-11-12 |
| 10416209 | Method and system for measuring power loss in a power transformer | Nilanga Abeywickrama, Svante Karlsson | 2019-09-17 |
| 10389107 | Protecting a transformer comprising a tap changer | Nilanga Abeywickrama | 2019-08-20 |
| 10309995 | Method and system for determining phasor components of a periodic waveform | Nilanga Abeywickrama, Robert Saers, Jonas Hedberg | 2019-06-04 |
| 10254155 | Monitoring torsional oscillations in a turbine-generator | Zoran Gajic, Stefan Roxenborg | 2019-04-09 |
| 9322866 | Method and apparatus for transformer diagnosis | Nilanga Abeywickrama | 2016-04-26 |
| 9099913 | Method and device for estimating the clamping force on a winding package of a transformer or a reactor | Torbjorn Wass | 2015-08-04 |
| 9075099 | Method for adaptation of ground fault detection | Henrik Johansson, Joseph Menezes, Stefan Roxenborg | 2015-07-07 |
| 9041383 | Method and device for linearizing a transformer | Henrik Johansson, Stefan Roxenborg, Joseph Menezes, Zoltan Nagy, Mikael Sehlstedt | 2015-05-26 |
| 9018960 | Method and device for enhancing the reliability of generator ground fault detection on a rotating electrical machine | Henrik Johansson, Joseph Menezes, Stefan Roxenborg | 2015-04-28 |
| 8924170 | Method and system for detecting a failed rectifier in an AC/DC converter | Stefan Roxenborg | 2014-12-30 |
| 8472156 | Method and device for supervising the sensitivity of a protection function | Stefan Thorburn, Henrik Johansson, Stefan Roxenborg | 2013-06-25 |
| 8279567 | Circuit breaker with improved re-closing functionality | Gabriel Olguin, Jianping Wang | 2012-10-02 |
| 8170723 | Determination and use of power system sensitivities | Bertil Berggren, Mats Larsson, Petr Korba, Alexandre Oudalov | 2012-05-01 |
| 8095326 | Method and device to predict a state of a power system in the time domain | Bertil Berggren, Stefan Roxenborg | 2012-01-10 |
| 8005637 | Method and apparatus for measuring characteristics of an electrical device | Stefan Thorburn | 2011-08-23 |
| 7719285 | Ground fault detection | Stefan Johansson, Marek Fulczyk, Sture Lindahl, Gabriel Olguin | 2010-05-18 |
| 6340890 | Method and device for locating partial discharges in an electric high-voltage apparatus | Mats Leijon | 2002-01-22 |
| 6157196 | Method for monitoring of tap changers by acoustic analysis | Håkan Kols, Lars Martinsson | 2000-12-05 |
| 5933012 | Device for sensing of electric discharges in a test object | Lars Dahlberg, Thomas Eriksson, Akbar Kheirmand, Mats Leijon, Henry Siberg +2 more | 1999-08-03 |