H02J 3/1885
Using rotating ac generators
Official title: using rotating AC generators, e.g. synchronous generators
H02J3/1885 (Using rotating ac generators) appears on 98 US grants and 97 published applications in this corpus.
Search patents in H02J- Granted patents
- 98
- Published applications
- 97
- Assignees
- 70
- Inventors
- 281
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 1 |
| 2003 | 3 | 4 |
| 2004 | 2 | 0 |
| 2005 | 2 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 4 |
| 2009 | 4 | 3 |
| 2010 | 2 | 7 |
| 2011 | 3 | 5 |
| 2012 | 4 | 7 |
| 2013 | 3 | 3 |
| 2014 | 4 | 3 |
| 2015 | 1 | 7 |
| 2016 | 8 | 5 |
| 2017 | 2 | 1 |
| 2018 | 4 | 6 |
| 2019 | 6 | 5 |
| 2020 | 6 | 5 |
| 2021 | 5 | 6 |
| 2022 | 6 | 6 |
| 2023 | 3 | 4 |
| 2024 | 4 | 3 |
| 2025 | 5 | 2 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Photovoltaic grid-connected system and control method therefor21 Jul 2026US 12,689,218 B2Sungrow Power Supply Co., Ltd.
- Portable synchronous condenser apparatus utilizing a DC motor, portable synchronous condenser system, method of operation, and method of manufacture21 Apr 2026US 12,609,532 B1
- Portable synchronous condenser apparatus, system, method of operation, and method of manufacture7 Apr 2026US 12,597,773 B1
- System and method for controlling a power generating facility23 Dec 2025US 12,506,340 B2GE Vernova Infrastructure Technology LLC
- Portable synchronous condenser apparatus, system, method of operation, and method of manufacture28 Oct 2025US 12,456,863 B1
- Portable synchronous condenser apparatus, system, method of operation, and method of manufacture1 Oct 2026US 2026/0302782 A1
- Grid-connected inverter and overvoltage suppression method therefor24 Sep 2026US 2026/0291230 A1Sungrow Power Supply Co., Ltd.
- Portable synchronous condenser apparatus, system, method of operation, and method of manufacture10 Sep 2026US 2026/0269619 A1
- Grid forming control of grid connected power converter9 Jul 2026US 2026/0196830 A1Vestas Wind Systems A/S
- Auxiliary redundant power supply for an energy storage system and energy storage system23 Apr 2026US 2026/0112894 A1Skeleton Technologies AG
Most cited
By later US patents
- Turbogenerator power control system and method70US 6,281,601 B1Capstone Turbine Corporation · 2001
- Closed loop power factor control for power supply systems65US 4,590,416 ARig Efficiency, Inc. · 1986
- Method, apparatus, and system for real time reactive power output monitoring and predicting63US 6,492,801 B1Southern Company Services, Inc. · 2002
- Synchronous motor KVAR regulation system42US 4,064,419 AWestinghouse Electric Corp. · 1977
- Power factor controller33US 4,388,578 ACynex Manufacturing Corporation · 1983