H02P 9/302
Brushless excitation
Official title: {Brushless excitation}
H02P9/302 (Brushless excitation) appears on 156 US grants and 153 published applications in this corpus.
Search patents in H02P- Granted patents
- 156
- Published applications
- 153
- Assignees
- 74
- Inventors
- 278
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 0 | 0 |
| 2004 | 2 | 3 |
| 2005 | 4 | 2 |
| 2006 | 3 | 5 |
| 2007 | 5 | 6 |
| 2008 | 6 | 7 |
| 2009 | 5 | 7 |
| 2010 | 1 | 5 |
| 2011 | 4 | 7 |
| 2012 | 7 | 7 |
| 2013 | 9 | 7 |
| 2014 | 4 | 10 |
| 2015 | 6 | 8 |
| 2016 | 10 | 12 |
| 2017 | 11 | 9 |
| 2018 | 10 | 11 |
| 2019 | 13 | 13 |
| 2020 | 7 | 5 |
| 2021 | 3 | 9 |
| 2022 | 8 | 2 |
| 2023 | 3 | 4 |
| 2024 | 5 | 8 |
| 2025 | 2 | 2 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wirelessly transferring power within an electric machine having AC and DC rotor coils9 Jun 2026US 12,651,992 B2Tau Motors, Inc.
- Brushless alternator5 May 2026US 12,620,849 B2Rapid Power Industries
- Engine starter circuits for electric machines20 Jan 2026US 12,529,339 B2Hamilton Sundstrand Corporation
- Uninterruptible power supply system with engine start-up6 May 2025US 12,294,238 B2
- Starter/generator arrangements for gas turbine engines11 Feb 2025US 12,224,700 B2Hamilton Sundstrand Corporation
- Brushless alternator18 Jun 2026US 2026/0171859 A1Rapid Power Industries
- Wirelessly transferring power within an electric machine having ac and dc rotor coils14 May 2026US 2026/0135502 A1Tau Motors, Inc.
- Method, controller and computer program for operating an inverter, and inverter system27 Nov 2025US 2025/0364933 A1
- Pulse width modulation generation strategy3 Jul 2025US 2025/0214444 A1Valeo eAutomotive Germany GmbH
- Externally excited electric synchronous machine5 Dec 2024US 2024/0405649 A1Mahle International GmbH
Most cited
By later US patents
- Starter/generator system with variable-frequency exciter control139US 5,594,322 ASundstrand Corporation · 1997
- Engine starting system utilizing multiple controlled acceleration rates116US 5,430,362 ASundstrand Corporation · 1995
- Rotor position detector with back EMF voltage estimation91US 5,384,527 ASundstrand Corporation · 1995
- Position-and-velocity sensorless control for starter generator electrical system using generator back-EMF voltage69US 5,495,162 ASundstrand Corporation · 1996
- Inverter for starting/generating system58US 4,992,721 ASundstrand Corporation · 1991