H02P 9/48
Arrangements for obtaining a constant output value at varying speed of the
Official title: Arrangements for obtaining a constant output value at varying speed of the generator, e.g. on vehicle (H02P9/04 - H02P9/46 take precedence)
H02P9/48 (Arrangements for obtaining a constant output value at varying speed of the) appears on 626 US grants and 639 published applications in this corpus.
Search patents in H02P- Granted patents
- 626
- Published applications
- 639
- Assignees
- 260
- Inventors
- 1,200
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 9 | 0 |
| 1997 | 8 | 0 |
| 1998 | 16 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 8 | 2 |
| 2002 | 9 | 5 |
| 2003 | 7 | 10 |
| 2004 | 12 | 17 |
| 2005 | 15 | 15 |
| 2006 | 16 | 21 |
| 2007 | 24 | 30 |
| 2008 | 22 | 31 |
| 2009 | 27 | 34 |
| 2010 | 19 | 41 |
| 2011 | 28 | 44 |
| 2012 | 38 | 43 |
| 2013 | 36 | 39 |
| 2014 | 39 | 31 |
| 2015 | 26 | 40 |
| 2016 | 36 | 32 |
| 2017 | 38 | 40 |
| 2018 | 41 | 39 |
| 2019 | 26 | 26 |
| 2020 | 30 | 21 |
| 2021 | 20 | 18 |
| 2022 | 17 | 11 |
| 2023 | 13 | 19 |
| 2024 | 11 | 14 |
| 2025 | 13 | 12 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Electrical machine and method of operating electrical machine7 May 2026US 2026/0128651 A1GE Aviation Systems LLC
- Method, controller and computer program for operating an inverter, and inverter system5 Mar 2026US 2026/0066821 A1
- System and method for generating power using a variable speed generator15 Jan 2026US 2026/0019015 A1The Estate of Michael W. Brochu
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Most cited
By later US patents
- Variable speed wind turbine with reduced power fluctuation and a static VAR mode of operation266US 5,225,712 AU.S. Windpower, Inc. · 1993
- Variable speed wind turbine245US 5,083,039 AU.S. Windpower, Inc. · 1992
- Hybrid generator apparatus162US 6,175,217 B12001
- Controller for permanent magnet generator155US 5,625,276 AColeman Powermate, Inc. · 1997
- Fuzzy logic integrated electrical control to improve variable speed wind turbine efficiency and performance105US 5,652,485 AThe United States of America as represented by the Administrator of the U. S. Environmental Protection Agency · 1997