H02K 21/042
With permanent magnets and field winding both rotating
Official title: {with permanent magnets and field winding both rotating}
H02K21/042 (With permanent magnets and field winding both rotating) appears on 342 US grants and 304 published applications in this corpus.
Search patents in H02K- Granted patents
- 342
- Published applications
- 304
- Assignees
- 102
- Inventors
- 467
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 8 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 14 | 0 |
| 2000 | 20 | 0 |
| 2001 | 13 | 3 |
| 2002 | 12 | 11 |
| 2003 | 9 | 14 |
| 2004 | 17 | 16 |
| 2005 | 15 | 14 |
| 2006 | 12 | 10 |
| 2007 | 4 | 16 |
| 2008 | 12 | 11 |
| 2009 | 8 | 14 |
| 2010 | 13 | 18 |
| 2011 | 12 | 16 |
| 2012 | 17 | 6 |
| 2013 | 8 | 18 |
| 2014 | 7 | 14 |
| 2015 | 13 | 10 |
| 2016 | 7 | 6 |
| 2017 | 8 | 9 |
| 2018 | 7 | 9 |
| 2019 | 16 | 30 |
| 2020 | 16 | 8 |
| 2021 | 9 | 7 |
| 2022 | 10 | 20 |
| 2023 | 8 | 4 |
| 2024 | 8 | 10 |
| 2025 | 6 | 8 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Brushless alternator5 May 2026US 12,620,849 B2Rapid Power Industries
- Wide-speed multiple interior rotor excitation machine14 Apr 2026US 12,603,556 B2Gentiam LLC
- Power distribution within an electric machine with rectified rotor windings17 Mar 2026US 12,580,503 B2Tau Motors, Inc.
- 4-phase motor and generator device30 Dec 2025US 12,512,726 B2
- Hybrid excited rotary machine21 Oct 2025US 12,451,781 B2GM Global Technology Operations LLC
- Brushless alternator18 Jun 2026US 2026/0171859 A1Rapid Power Industries
- Power distribution within an electric machine with rectified rotor windings12 Mar 2026US 2026/0074632 A1Tau Motors, Inc.
- Motor4 Dec 2025US 2025/0373134 A1Mitsubishi Electric Corporation
- Electric motor for auto-traction and road vehicle equipped with such motor7 Aug 2025US 2025/0253724 A1Ferrari S.P. A.
- Magnet-assisted wound rotor for electric motor7 Aug 2025US 2025/0253746 A1Rivian IP Holdings, LLC
Most cited
By later US patents
- Hybrid alternator213US 5,747,909 AEcoair Corp. · 1998
- Alternator for an automotive vehicle130US 5,998,903 ADenso Corporation · 1999
- Rotating electrical machine with electromagnetic and permanent magnet excitation101US 5,663,605 AFord Motor Company · 1997
- Alternating current generator100US 4,959,577 AGeneral Motors Corporation · 1990
- Hybrid-energized electric machine98US 5,672,926 ASiemens Aktiengesellschaft · 1997