H02P 1/50
By changing over from asynchronous to synchronous operation
Official title: by changing over from asynchronous to synchronous operation (H02P1/48 takes precedence)
H02P1/50 (By changing over from asynchronous to synchronous operation) appears on 36 US grants and 30 published applications in this corpus.
Search patents in H02P- Granted patents
- 36
- Published applications
- 30
- Assignees
- 27
- Inventors
- 69
- Latest grant
- 22 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 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 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 4 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 2 |
| 2013 | 1 | 0 |
| 2014 | 1 | 3 |
| 2015 | 3 | 3 |
| 2016 | 3 | 1 |
| 2017 | 3 | 1 |
| 2018 | 1 | 4 |
| 2019 | 0 | 2 |
| 2020 | 5 | 2 |
| 2021 | 2 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Synchronous motor startup configuration to synchronous mode at a field zero-crossing22 Aug 2023US 11,736,051 B2Schweitzer Engineering Laboratories, Inc.
- Variable speed generator/motor device11 Jan 2022US 11,223,310 B2Hitachi, Ltd.
- Integrated brushless starter generator8 Jun 2021US 11,028,812 B2Astronics Advanced Electronic Systems Corp.
- PM line-start motor and switch-on method therefor13 Apr 2021US 10,978,967 B2KSB SE & Co. KGaA
- Electric motor protection using stator current and voltage measurements24 Nov 2020US 10,848,092 B2Schweitzer Engineering Laboratories, Inc.
- Method and device for synchronous motor control28 Dec 2023US 2023/0421080 A1Sami Shamoon College of Engineering (R.A)
- Synchronous motor startup configuration to synchronous mode at a field zero-crossing9 Feb 2023US 2023/0038317 A1Schweitzer Engineering Laboratories, Inc.
- Variable speed generator/motor device29 Jul 2021US 2021/0234487 A1Hitachi, Ltd.
- Variable speed generator/motor device22 Apr 2021US 2021/0118611 A1Hitachi, Ltd.
- PM Line-Start Motor and Switch-On Method Therefor10 Sep 2020US 2020/0287481 A1KSB SE & Co. KGaA
Most cited
By later US patents
- Starter/generator system with variable-frequency exciter control139US 5,594,322 ASundstrand Corporation · 1997
- Method and system for starting a motor-commutated SCR inverter42US 4,565,957 ABorg-Warner Corporation · 1986
- Dual-stator induction synchronous motor27US 5,254,894 ASatake Engineering Co., Ltd. · 1993
- Synchronous motor with two permanent magnet rotor portions24US 5,281,879 ASatake Corporation · 1994
- Starting and synchronizing system for line-start permanent magnet motor23US 5,859,513 AGeneral Electric Company · 1999