H02J 3/40
Synchronisation of generators for connection to a network or to another generator
H02J3/40 (Synchronisation of generators for connection to a network or to another generator) appears on 940 US grants and 1,035 published applications in this corpus.
Search patents in H02J- Granted patents
- 940
- Published applications
- 1,035
- Assignees
- 490
- Inventors
- 2,003
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 11 | 3 |
| 2002 | 7 | 6 |
| 2003 | 5 | 8 |
| 2004 | 7 | 13 |
| 2005 | 10 | 17 |
| 2006 | 13 | 13 |
| 2007 | 6 | 11 |
| 2008 | 8 | 20 |
| 2009 | 14 | 20 |
| 2010 | 11 | 27 |
| 2011 | 22 | 47 |
| 2012 | 22 | 73 |
| 2013 | 53 | 69 |
| 2014 | 28 | 61 |
| 2015 | 36 | 69 |
| 2016 | 78 | 55 |
| 2017 | 61 | 78 |
| 2018 | 65 | 61 |
| 2019 | 78 | 59 |
| 2020 | 48 | 54 |
| 2021 | 64 | 49 |
| 2022 | 54 | 46 |
| 2023 | 41 | 37 |
| 2024 | 39 | 48 |
| 2025 | 47 | 44 |
| 2026 | 39 | 47 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power management system6 Oct 2026US 12,756,197 B2Techwin Co., Ltd.
- Multi-terminal flexible direct-current adaptive grid-forming control system, method, device, and medium6 Oct 2026US 12,756,202 B2Tsinghua University
- Control method for a grid following voltage source converter without phase locked loop29 Sep 2026US 12,749,898 B2TransGrid Solutions Inc.
- Utilization of distributed generator inverters as statcom22 Sep 2026US 12,744,380 B2
- Techniques for using an energy storage system as soft starter for large inductive devices25 Aug 2026US 12,719,263 B2Caterpillar Inc.
- Method of generalized synchronous optimal pulse width modulation for renewable energy station and system thereof8 Oct 2026US 2026/0312407 A1Shandong University
- Method for switching between grid-following and grid-forming control modes of converter based on latch-like operator24 Sep 2026US 2026/0291227 A1Zhejiang University
- Power supply and demand synchronization system and method for modular multi-port system24 Sep 2026US 2026/0291251 A1DG Matrix, Inc.
- Systems and Methods for Resynchronization of Micro-Grids with Larger Power Grids17 Sep 2026US 2026/0280293 A1ABB Schweiz AG
- Transfer switch with delayed optimal power transfer17 Sep 2026US 2026/0280335 A1Vertiv Corporation
Most cited
By later US patents
- Contactless power charging system and energy storage system including the same279US 8,604,746 B2Samsung SDI.Co., Ltd. · 2013
- Variable speed wind turbine with reduced power fluctuation and a static VAR mode of operation266US 5,225,712 AU.S. Windpower, Inc. · 1993
- High-performance solar photovoltaic (PV) energy conversion system266US 7,479,774 B2Yuan Ze University · 2009
- Power source device for a load with a stand-by power supply system260US 4,652,770 AMitsubishi Denki Kabushiki Kaisha · 1987
- Integrated control system and method for controlling mode, synchronization, power factor, and utility outage ride-through for micropower generation systems259US 6,380,719 B2SatCon Technology Corporation · 2002