H02P 25/08
Reluctance motors
H02P25/08 (Reluctance motors) appears on 817 US grants and 596 published applications in this corpus.
Search patents in H02P- Granted patents
- 817
- Published applications
- 596
- Assignees
- 303
- Inventors
- 1,097
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 8 | 0 |
| 1987 | 7 | 0 |
| 1988 | 6 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 18 | 0 |
| 1993 | 11 | 0 |
| 1994 | 16 | 0 |
| 1995 | 15 | 0 |
| 1996 | 19 | 0 |
| 1997 | 19 | 0 |
| 1998 | 38 | 0 |
| 1999 | 50 | 0 |
| 2000 | 33 | 0 |
| 2001 | 17 | 13 |
| 2002 | 29 | 24 |
| 2003 | 23 | 13 |
| 2004 | 19 | 29 |
| 2005 | 21 | 27 |
| 2006 | 18 | 25 |
| 2007 | 25 | 21 |
| 2008 | 16 | 20 |
| 2009 | 8 | 19 |
| 2010 | 16 | 17 |
| 2011 | 16 | 16 |
| 2012 | 17 | 10 |
| 2013 | 12 | 23 |
| 2014 | 14 | 27 |
| 2015 | 14 | 35 |
| 2016 | 19 | 40 |
| 2017 | 39 | 43 |
| 2018 | 34 | 31 |
| 2019 | 29 | 32 |
| 2020 | 39 | 37 |
| 2021 | 33 | 14 |
| 2022 | 23 | 31 |
| 2023 | 19 | 16 |
| 2024 | 20 | 16 |
| 2025 | 15 | 10 |
| 2026 | 5 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H02P 25/092Converters specially adapted for controlling reluctance motors326
- H02P 25/086Commutation221
- H02P 25/098Arrangements for reducing torque ripple106
- H02P 25/0805Whereby the speed is regulated by measuring the motor speed and comparing13
- H02P 25/083Arrangements for increasing the switching speed from one coil to the next7
Recent patents
- System and method for shifting operation modes of variable flux memory motors5 May 2026US 12,620,920 B2Jacobi Motors, LLC
- Controller for a switched reluctance machine28 Apr 2026US 12,614,999 B2Hamilton Sundstrand Corporation
- Driving system31 Mar 2026US 12,592,660 B2Mitsubishi Electric Corporation
- Axial flux switched reluctance and inductance state machine systems, devices, and methods17 Mar 2026US 12,580,465 B2Anthropocene Institute LLC
- Two-switch exciter drive architecture with single switch modes6 Jan 2026US 12,519,400 B2Hamilton Sundstrand Corporation
- System and method for fault diagnosis for cascaded h-bridge (chb) converter based switched reluctance motor (srm) drive systems20 Aug 2026US 2026/0243828 A1Enedym Inc.
- Magnetically geared systems and methods23 Jul 2026US 2026/0213686 A1Magnomatics Limited
- Rotating electrical machine drive device and moving body drive device16 Jul 2026US 2026/0205044 A1Aisin Corporation
- Axial flux switched reluctance and inductance state machine systems, devices, and methods2 Jul 2026US 2026/0189114 A1Anthropocene Institute LLC
- Topological circuit and control strategy for driving switched reluctance motor (srm)7 May 2026US 2026/0128704 A1Taiyuan University of Technology
Most cited
By later US patents
- Torque estimator for switched reluctance machines145US 4,961,038 AGeneral Electric Company · 1990
- Pulse width modulating motor controller116US 5,489,831 AHoneywell Inc. · 1996
- Variable speed variable reluctance electrical machines93US 4,670,696 AKollmorgen Technologies Corporation · 1987
- Electromagnetic actuator system using stepper motor with closed loop position sensing, electronic commutation and dynamic position and anomaly correction85US 4,618,808 AInternational Business Machines Corporation · 1986
- Rotor position estimator for switched reluctance motor85US 4,772,839 AGeneral Electric Company · 1988