H02P 23/26
Power factor control [pfc]
Official title: Power factor control [PFC]
H02P23/26 (Power factor control [pfc]) appears on 253 US grants and 217 published applications in this corpus.
Search patents in H02P- Granted patents
- 253
- Published applications
- 217
- Assignees
- 165
- Inventors
- 491
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 10 | 0 |
| 1984 | 15 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 3 |
| 2003 | 2 | 4 |
| 2004 | 5 | 6 |
| 2005 | 2 | 4 |
| 2006 | 4 | 1 |
| 2007 | 2 | 9 |
| 2008 | 6 | 5 |
| 2009 | 4 | 3 |
| 2010 | 6 | 7 |
| 2011 | 2 | 10 |
| 2012 | 4 | 6 |
| 2013 | 9 | 13 |
| 2014 | 8 | 13 |
| 2015 | 15 | 22 |
| 2016 | 16 | 11 |
| 2017 | 14 | 18 |
| 2018 | 15 | 14 |
| 2019 | 14 | 9 |
| 2020 | 10 | 16 |
| 2021 | 13 | 9 |
| 2022 | 12 | 7 |
| 2023 | 3 | 7 |
| 2024 | 8 | 10 |
| 2025 | 10 | 5 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Control circuit of a triac or a thyristor6 Oct 2026US 12,756,346 B2STMicroelectronics International N. V.
- Systems and methods for power sharing control for direct integration of fuel cells in a dual-inverter EV drivetrain19 May 2026US 12,630,025 B2Eleappower Ltd.
- Multiplexing topological structure for controlling duplex-winding motor and charging on board charger12 May 2026US 12,623,562 B2Hangzhou City University
- Method for compensating reactive power, associated control system, and sensor driver circuit13 Jan 2026US 12,525,864 B2SKF Magnetic Mechatronics; SKF Canada Limited
- Magnetic gear embedded rotating electric machine control device9 Dec 2025US 12,494,729 B2Mitsubishi Electric Corporation
- Power factor correction circuit17 Sep 2026US 2026/0280418 A1DRP Holdings LLC
- Power supply device, electronic apparatus including same, and power supply method21 May 2026US 2026/0142601 A1Samsung Electronics Co., Ltd.
- Control method for electronically commutated fans and device thereof26 Feb 2026US 2026/0058585 A1Chip-GaN Power Semiconductor Corporation
- Motor power source regulation circuit, control method and electronic device29 Jan 2026US 2026/0031698 A1Hunan Megmeet Electrical Technology Co., Ltd.
- Multi-motor integrated power circuit, motor power control method and electronic device29 Jan 2026US 2026/0031710 A1Hunan Megmeet Electrical Technology Co., Ltd.
Most cited
By later US patents
- Power factor control system for AC induction motors106US 4,052,648 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1977
- Air conditioning device75US 5,793,623 ASharp Kabushiki Kaisha · 1998
- Systems and methods for improved motor drive power factor control69US 7,495,410 B2Rockwell Automation Technologies, Inc. · 2009
- Power factor control system for AC induction motors68US 4,266,177 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1981
- Motor drive using flux adjustment to control power factor65US 7,683,568 B2Rockwell Automation Technologies, Inc. · 2010