H02P 9/38
Self-excitation by current derived from rectification of both output voltage and output
Official title: Self-excitation by current derived from rectification of both output voltage and output current of generator
H02P9/38 (Self-excitation by current derived from rectification of both output voltage and output) appears on 31 US grants and 18 published applications in this corpus.
Search patents in H02P- Granted patents
- 31
- Published applications
- 18
- Assignees
- 31
- Inventors
- 94
- Latest grant
- 19 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 2 |
| 2014 | 1 | 0 |
| 2015 | 1 | 1 |
| 2016 | 2 | 1 |
| 2017 | 0 | 5 |
| 2018 | 2 | 1 |
| 2019 | 2 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 2 |
| 2023 | 0 | 0 |
| 2024 | 2 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Flexible excitation system and control method therefor19 Nov 2024US 12,149,199 B2State Grid Zhejiang Electric Power Research Institute
- Secondary magnetic excitation generator-motor device26 Mar 2024US 11,942,873 B2Hitachi, Ltd.
- Electrical isolation of an alternator23 Jun 2020US 10,693,340 B2BorgWarner Inc.
- Field winding synchronous machine drive system2 Apr 2019US 10,250,175 B2Denso Corporation
- System and method for an inverter for self-excitation of an induction machine5 Mar 2019US 10,224,849 B2Deere & Company
- Electric generator24 Oct 2024US 2024/0356468 A1
- Generator Transformer6 Jun 2024US 2024/0186926 A1
- Flexible excitation system and control method therefor22 Dec 2022US 2022/0407316 A1Grid Zhejiang Electric Power Co., Ltd. Research Institute
- Secondary magnetic excitation generator-motor device21 Jul 2022US 2022/0231615 A1Hitachi, Ltd.
- Electromagnetic induction power generator9 Dec 2021US 2021/0384854 A1TDK Corporation
Most cited
By later US patents
- Electric machine with a transformer having a rotating component117US 5,519,275 AColeman Powermate, Inc. · 1996
- Alternating current generator with direct connected exciter winding47US 5,714,821 AMarathon Electric Mfg. Corp. · 1998
- Wound rotor synchronous motor-generator and field control system therefor30US 5,770,909 ARosen Motors, L.P. · 1998
- Generator with inherent overload limiting19US 4,992,687 ATechmarex (Properietary) Limited · 1991
- Variable voltage control for self-excited self-regulated synchronous alternator17US 4,496,897 ALima Electric Co., Inc. · 1985