H02K 47/22
Single-armature frequency converters with or without phase-number conversion
H02K47/22 (Single-armature frequency converters with or without phase-number conversion) appears on 22 US grants and 13 published applications in this corpus.
Search patents in H02K- Granted patents
- 22
- Published applications
- 13
- Assignees
- 13
- Inventors
- 31
- Latest grant
- 15 Jun 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 4 | 2 |
| 2003 | 0 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 2 |
| 2016 | 2 | 2 |
| 2017 | 0 | 2 |
| 2018 | 1 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- System and method for damping of torsional oscillations in large inertial energy storage systems15 Jun 2021US 11,038,398 B2Raytheon Company
- Stator used in resolvers, and resolver including same24 Dec 2019US 10,514,275 B2Ls Automotive Technologies Co., Ltd.
- System having at least one frequency converter20 Aug 2019US 10,389,304 B2Schmidhauser AG
- Rotary solar converter24 Jul 2018US 10,033,302 B2Koolbridge Solar, Inc.
- Inertial energy storage system and hydro-fluoro-ether power transformer scheme for radar power systems and large PFN charging27 Dec 2016US 9,531,247 B2Raytheon Company
- System and method for damping of torsional oscillations in large inertial energy storage systems26 Dec 2019US 2019/0393754 A1Raytheon Company
- System having at least one frequency converter27 Sep 2018US 2018/0278212 A1Schmidhauser AG
- Stator used in resolvers, and resolver including same14 Sep 2017US 2017/0261350 A1Daesung Electric Co., Ltd.
- Stator used in resolvers, and resolver including same20 Jul 2017US 2017/0207670 A1Daesung Electric Co., Ltd.
- Dual frequency electrical generators21 Apr 2016US 2016/0111949 A1Hamilton Sundstrand Corporation
Most cited
By later US patents
- Asynchronous conversion method and apparatus for use with variable speed turbine hydroelectric generation36US 5,742,515 AGeneral Electric Company · 1998
- Dynamoelectric machine28US 4,039,910 AThe Garrett Corporation · 1977
- Interconnection system for transmitting power between electrical systems21US 6,741,485 B1General Electric Company · 2004
- Inertial energy storage system and hydro-fluoro-ether power transformer scheme for radar power systems and large PFN charging17US 9,531,247 B2Raytheon Company · 2016
- Compensation for power transfer systems using variable rotary transformer16US 5,952,816 AGeneral Electric Company · 1999