H02P 9/305
Controlling voltage
Official title: {controlling voltage (H02P9/302 takes precedence)}
H02P9/305 (Controlling voltage) appears on 486 US grants and 359 published applications in this corpus.
Search patents in H02P- Granted patents
- 486
- Published applications
- 359
- Assignees
- 204
- Inventors
- 833
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 9 | 0 |
| 1998 | 17 | 0 |
| 1999 | 15 | 0 |
| 2000 | 15 | 0 |
| 2001 | 21 | 3 |
| 2002 | 22 | 34 |
| 2003 | 22 | 31 |
| 2004 | 40 | 16 |
| 2005 | 13 | 17 |
| 2006 | 18 | 17 |
| 2007 | 18 | 11 |
| 2008 | 9 | 17 |
| 2009 | 15 | 20 |
| 2010 | 14 | 12 |
| 2011 | 9 | 15 |
| 2012 | 11 | 13 |
| 2013 | 13 | 13 |
| 2014 | 13 | 9 |
| 2015 | 12 | 16 |
| 2016 | 11 | 7 |
| 2017 | 13 | 12 |
| 2018 | 11 | 10 |
| 2019 | 12 | 22 |
| 2020 | 26 | 20 |
| 2021 | 11 | 14 |
| 2022 | 13 | 10 |
| 2023 | 6 | 7 |
| 2024 | 10 | 3 |
| 2025 | 4 | 8 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Automatic voltage regulator for a generator25 Aug 2026US 12,719,393 B2Discovery Energy, LLC
- Exciter circuit for a synchronous machine18 Aug 2026US 12,712,478 B2Brush Electrical Machines Limited
- Digital logic compatible inputs in compound semiconductor circuits7 Jul 2026US 12,676,615 B2Renesas Electronics America Inc.
- Cascade activation method and mechatronic system24 Mar 2026US 12,587,119 B2Ojmar, S. A.
- Electrical system for an aircraft equipped with a motor27 Jan 2026US 12,537,466 B2Safran
- Cascade activation method and mechatronic system6 Aug 2026US 2026/0230016 A1Ojmar, S. A.
- A wind turbine power controller and wind turbine system21 May 2026US 2026/0142595 A1Ventum Dynamics Group AS
- Power converter and system for an engine starter generator2 Oct 2025US 2025/0309782 A1General Electric Company
- Supplying power to auxiliary wind turbine equipment14 Aug 2025US 2025/0257714 A1Siemens Gamesa Renewable Energy A/S
- Automatic voltage regulator for a generator26 Jun 2025US 2025/0211144 A1Discovery Energy, LLC
Most cited
By later US patents
- Hybrid alternator213US 5,747,909 AEcoair Corp. · 1998
- Controller for permanent magnet generator155US 5,625,276 AColeman Powermate, Inc. · 1997
- Controlling generator power99US 6,624,533 B1Westerbeke Corporation · 2003
- Power generation system having transient ride-through/load-leveling capabilities94US 6,787,933 B2Capstone Turbine Corporation · 2004
- Boost mode power conversion86US 5,946,202 ABaker Hughes Incorporated · 1999