H02H 7/06
Emergency protective circuit arrangements specially adapted for specific types of electric machines
Official title: for dynamo-electric generators; for synchronous capacitors
H02H7/06 (Emergency protective circuit arrangements specially adapted for specific types of electric machines) appears on 428 US grants and 301 published applications in this corpus.
Search patents in H02H- Granted patents
- 428
- Published applications
- 301
- Assignees
- 206
- Inventors
- 942
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 10 | 0 |
| 1980 | 10 | 0 |
| 1981 | 6 | 0 |
| 1982 | 9 | 0 |
| 1983 | 3 | 0 |
| 1984 | 8 | 0 |
| 1985 | 4 | 0 |
| 1986 | 9 | 0 |
| 1987 | 7 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 9 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 8 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 9 | 0 |
| 1997 | 8 | 0 |
| 1998 | 9 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 11 | 5 |
| 2002 | 5 | 6 |
| 2003 | 4 | 10 |
| 2004 | 13 | 11 |
| 2005 | 6 | 7 |
| 2006 | 6 | 7 |
| 2007 | 13 | 7 |
| 2008 | 5 | 12 |
| 2009 | 8 | 9 |
| 2010 | 9 | 4 |
| 2011 | 3 | 5 |
| 2012 | 4 | 14 |
| 2013 | 8 | 24 |
| 2014 | 12 | 24 |
| 2015 | 25 | 30 |
| 2016 | 20 | 27 |
| 2017 | 20 | 13 |
| 2018 | 21 | 10 |
| 2019 | 19 | 11 |
| 2020 | 13 | 14 |
| 2021 | 6 | 10 |
| 2022 | 10 | 10 |
| 2023 | 12 | 10 |
| 2024 | 9 | 11 |
| 2025 | 7 | 6 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power generation device6 Oct 2026US 12,756,176 B2IHI Corporation
- Systems and methods for breaker operation in power systems22 Sep 2026US 12,744,374 B2Doosan Bobcat North America, Inc.
- Generator circuit breaker9 Jun 2026US 12,651,896 B2Xi' An Jiaotong University
- Sustained undervoltage protection10 Feb 2026US 12,549,118 B2Hamilton Sundstrand Corporation
- Exciter circuit for an externally excited synchronous machine, motor vehicle and method for de-excitation of an exciter winding3 Feb 2026US 12,542,510 B2Audi AG
- Stator-rotor protection for multi-phase wound-rotor machines24 Sep 2026US 2026/0291211 A1Schweitzer Engineering Laboratories, Inc.
- Method for monitoring and protecting an electrical hybridisation system against the risk of fire13 Aug 2026US 2026/0233851 A1Safran Electrical & Power
- Safely unlocking dc voltage sources28 May 2026US 2026/0149263 A1ZF Friedrichshafen AG
- System and method for minimizing trips in a power generating asset19 Mar 2026US 2026/0081547 A1GE Infrastructure Technology LLC
- System and method for automatic calibration of stator earth fault protection for generator30 Oct 2025US 2025/0334659 A1Siemens Aktiengesellschaft
Most cited
By later US patents
- Hybrid alternator213US 5,747,909 AEcoair Corp. · 1998
- Alternator for a motor vehicle having a ventilator and device for monitoring and a controlling the ventilator174US 5,160,881 ARobert Bosch GmbH · 1992
- Output cable measurement166US 10,114,061 B2Kohler Co. · 2018
- Starter/generator system having multivoltage generation capability130US 5,512,811 ASundstrand Corporation · 1996
- Multifunction protective relay system113US 5,224,011 AGas Research Institute · 1993