H02P 9/40
Arrangements for controlling electric generators for the purpose of obtaining a desired
Official title: by variation of reluctance of magnetic circuit of generator
H02P9/40 (Arrangements for controlling electric generators for the purpose of obtaining a desired) appears on 79 US grants and 43 published applications in this corpus.
Search patents in H02P- Granted patents
- 79
- Published applications
- 43
- Assignees
- 38
- Inventors
- 115
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 6 |
| 2004 | 3 | 3 |
| 2005 | 3 | 0 |
| 2006 | 2 | 1 |
| 2007 | 3 | 3 |
| 2008 | 1 | 2 |
| 2009 | 2 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 1 |
| 2017 | 1 | 8 |
| 2018 | 1 | 2 |
| 2019 | 8 | 2 |
| 2020 | 2 | 2 |
| 2021 | 1 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Axial flux switched reluctance and inductance state machine systems, devices, and methods17 Mar 2026US 12,580,465 B2Anthropocene Institute LLC
- Axial flux switched reluctance and inductance state machine systems, devices, and methods17 Sep 2024US 12,095,320 B2Anthropocene Institute LLC
- System for delivering and storing energy28 Nov 2023US 11,827,109 B2Ricardo UK Limited
- Permanent magnet energized motor with rotatable bar magnets11 Jan 2022US 11,223,251 B2Schaeffler Technologies AG & Co. KG
- Rotary electrical machine12 Oct 2021US 11,146,158 B2Denso Corporation
- Axial flux switched reluctance and inductance state machine systems, devices, and methods2 Jul 2026US 2026/0189114 A1Anthropocene Institute LLC
- Power generator and power generation system using same9 Oct 2025US 2025/0317014 A1Kaisei Corporation
- Power conditioning for high-speed machine generator26 Jun 2025US 2025/0210982 A1Georgia Tech Research Corporation
- Axial flux switched reluctance and inductance state machine systems, devices, and methods2 Jan 2025US 2025/0007375 A1Anthropocene Institute LLC
- Circuit for recapturing magnetic energy1 Feb 2024US 2024/0039373 A1
Most cited
By later US patents
- Doubly-fed switched reluctance machine65US 5,811,905 AEmerson Electric Co. · 1998
- Method and apparatus for implementing sensorless control of a switched reluctance machine63US 5,929,590 AEmerson Electric Co. · 1999
- Power conversion system using a switched reluctance motor/generator58US 5,012,177 ASundstrand Corporation · 1991
- Fault-tolerant switched reluctance machine53US 4,896,088 AGeneral Electric Company · 1990
- Doubly salient permanent magnet machine with field weakening (or boosting) capability53US 5,825,113 AElectric Power Research Institute, Inc. · 1998