H02P 25/024
Controlled by supply frequency
Official title: controlled by supply frequency
H02P25/024 (Controlled by supply frequency) appears on 401 US grants and 339 published applications in this corpus.
Search patents in H02P- Granted patents
- 401
- Published applications
- 339
- Assignees
- 245
- Inventors
- 917
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 5 | 0 |
| 1980 | 0 | 0 |
| 1981 | 6 | 0 |
| 1982 | 7 | 0 |
| 1983 | 5 | 0 |
| 1984 | 14 | 0 |
| 1985 | 9 | 0 |
| 1986 | 16 | 0 |
| 1987 | 9 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 2 |
| 2004 | 4 | 7 |
| 2005 | 6 | 4 |
| 2006 | 7 | 7 |
| 2007 | 8 | 8 |
| 2008 | 1 | 9 |
| 2009 | 8 | 8 |
| 2010 | 4 | 13 |
| 2011 | 6 | 16 |
| 2012 | 10 | 17 |
| 2013 | 23 | 20 |
| 2014 | 13 | 22 |
| 2015 | 21 | 22 |
| 2016 | 20 | 15 |
| 2017 | 21 | 14 |
| 2018 | 18 | 29 |
| 2019 | 20 | 35 |
| 2020 | 23 | 18 |
| 2021 | 20 | 14 |
| 2022 | 13 | 14 |
| 2023 | 11 | 11 |
| 2024 | 13 | 15 |
| 2025 | 8 | 10 |
| 2026 | 6 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Motor controller15 Sep 2026US 12,738,871 B2Infineon Technologies Austria AG
- Centrifugal gyroscopic devices, and associated systems and methods4 Aug 2026US 12,698,761 B2
- Method for automatically setting an angular position sensor16 Jun 2026US 12,658,834 B2Safran Electrical & Power
- Motor control device, motor control method, hybrid system, boost converter system, and electric power steering system26 May 2026US 12,640,664 B2Hitachi Astemo, Ltd.
- Control of a rotating electric machine24 Mar 2026US 12,587,120 B2Safran Electrical & Power
- Method for operating an electric motor27 Aug 2026US 2026/0254377 A1Schaeffler Technologies AG & Co. KG
- Multiple pulse initialization of a bldc motor encoder6 Aug 2026US 2026/0230011 A1Robert Bosch GmbH
- Method and Device for Operating an Electrical Machine in an Emergency Operating Mode30 Jul 2026US 2026/0221918 A1Bayerische Motoren Werke Aktiengesellschaft
- Drive device and method for controlling drive device23 Jul 2026US 2026/0213687 A1Mitsubishi Heavy Industries, Ltd.
- Controller and drive circuit for electric motors7 May 2026US 2026/0128702 A1
Most cited
By later US patents
- Direct current motor with independently driven and switchable stators1,152US 8,575,880 B22013
- Apparatus for controlling electric motor861US 4,788,485 AMitsubishi Denki Kabushiki Kaisha · 1988
- Air gap control systems and methods405US 10,193,429 B2Boulder Wind Power, Inc. · 2019
- Power factor motor control system84US 4,982,147 AState of Oregon acting by and through the State Board of Higher Education on behalf of Oregon State University · 1991
- Electric motor67US 7,795,830 B2Elckon Limited · 2010