H02K 19/28
For self-excitation
Official title: for self-excitation
H02K19/28 (For self-excitation) appears on 75 US grants and 60 published applications in this corpus.
Search patents in H02K- Granted patents
- 75
- Published applications
- 60
- Assignees
- 47
- Inventors
- 137
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 3 |
| 2004 | 0 | 2 |
| 2005 | 2 | 1 |
| 2006 | 1 | 2 |
| 2007 | 1 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 3 |
| 2011 | 0 | 2 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 4 |
| 2015 | 3 | 5 |
| 2016 | 2 | 7 |
| 2017 | 2 | 1 |
| 2018 | 6 | 1 |
| 2019 | 5 | 6 |
| 2020 | 5 | 5 |
| 2021 | 2 | 1 |
| 2022 | 4 | 3 |
| 2023 | 2 | 2 |
| 2024 | 2 | 5 |
| 2025 | 1 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bipolar induction electric machine10 Mar 2026US 12,573,926 B2PolyWavePower IP Proprietary Limited
- Rectifier assemblies10 Feb 2026US 12,549,075 B2Hamilton Sundstrand Corporation
- Architecture for an electric power generator for aviation17 Jun 2025US 12,334,785 B2The Boeing Company
- Motor generator with improved air gap flux alignment3 Dec 2024US 12,160,138 B2BHE Turbomachinery, LLC
- Dual axis alternator20 Feb 2024US 11,905,878 B2Kohler Co.
- Rotating electric machine30 Jul 2026US 2026/0221848 A1Denso Corporation
- Self-excited brushless machine with compensated field windings11 Jun 2026US 2026/0163431 A1The Texas A&M University System
- Rectifier assemblies13 Feb 2025US 2025/0055352 A1Hamilton Sundstrand Corporation
- Magnet-less and brush-less rotating transformer excited synchronous machine and method of its control30 May 2024US 2024/0178726 A1Volektra Inc.
- Dual axis alternator2 May 2024US 2024/0141827 A1Kohler Co.
Most cited
By later US patents
- Electric machine with a transformer having a rotating component117US 5,519,275 AColeman Powermate, Inc. · 1996
- Dual output synchronous-induction starting/generating system81US 5,587,647 ASundstrand Corporation · 1996
- Hybrid alternator72US 5,753,989 AEcoair Corp. · 1998
- Hybrid alternator with voltage regulator69US 5,502,368 AEcoair Corp. · 1996
- Variable speed constant frequency synchronous electric power generating system and method of using same65US 5,418,446 A1995