H02J 3/01
Arrangements for reducing harmonics or ripples
H02J3/01 (Arrangements for reducing harmonics or ripples) appears on 596 US grants and 603 published applications in this corpus.
Search patents in H02J- Granted patents
- 596
- Published applications
- 603
- Assignees
- 391
- Inventors
- 1,582
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 21 | 0 |
| 1995 | 12 | 0 |
| 1996 | 15 | 0 |
| 1997 | 12 | 0 |
| 1998 | 15 | 0 |
| 1999 | 11 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 0 |
| 2002 | 10 | 12 |
| 2003 | 8 | 6 |
| 2004 | 2 | 7 |
| 2005 | 13 | 12 |
| 2006 | 8 | 6 |
| 2007 | 5 | 10 |
| 2008 | 7 | 11 |
| 2009 | 7 | 5 |
| 2010 | 3 | 10 |
| 2011 | 6 | 15 |
| 2012 | 7 | 23 |
| 2013 | 12 | 23 |
| 2014 | 16 | 17 |
| 2015 | 14 | 28 |
| 2016 | 21 | 42 |
| 2017 | 30 | 37 |
| 2018 | 40 | 36 |
| 2019 | 47 | 44 |
| 2020 | 37 | 35 |
| 2021 | 28 | 31 |
| 2022 | 37 | 42 |
| 2023 | 31 | 43 |
| 2024 | 33 | 44 |
| 2025 | 34 | 31 |
| 2026 | 25 | 33 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Passive-type harmonic removal device and method for manufacturing same6 Oct 2026US 12,755,873 B2The Thinking Lion Co., Ltd.
- Power supply system and conversion method6 Oct 2026US 12,756,189 B2Huawei Digital Power Technologies Co., Ltd.
- Utilization of distributed generator inverters as statcom22 Sep 2026US 12,744,380 B2
- Power systems and control methods to address peak loading15 Sep 2026US 12,738,741 B2Flex Ltd.
- Power conversion device comprising three-level inverter and balance circuit and control method thereof15 Sep 2026US 12,738,863 B2Delta Electronics (Shanghai) Co., Ltd.
- Method of generalized synchronous optimal pulse width modulation for renewable energy station and system thereof8 Oct 2026US 2026/0312407 A1Shandong University
- Power supply tie transformer, and regulation and control method therefor8 Oct 2026US 2026/0312409 A1
- Drying device, heater control method, and storage medium1 Oct 2026US 2026/0302780 A1Ricoh Company, Ltd.
- Transformer system1 Oct 2026US 2026/0302781 A1
- Grid Forming Over Distribution Grid with Renewable Sources and Loads1 Oct 2026US 2026/0302792 A1Smart Wires Inc.
Most cited
By later US patents
- System and method for reducing harmonic currents by current injection335US 5,345,375 ARegents of the University of Minnesota · 1994
- Systems and methods for preventing islanding of grid-connected electrical power systems250US 6,429,546 B1Georgia Tech Research Corporation · 2002
- System for reducing harmonics by harmonic current injection194US 5,499,178 ARegents of the University of Minnesota · 1996
- Programmable timed electrical power management device96US 5,278,771 ASETi Co., Ltd. · 1994
- Active power conditioner for reactive and harmonic compensation having PWM and stepped-wave inverters81US 5,751,138 AUniversity of Washington · 1998