H02P 7/2825
Whereby the speed is regulated by measuring the motor speed and comparing
Official title: {whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value}
H02P7/2825 (Whereby the speed is regulated by measuring the motor speed and comparing) appears on 13 US grants and 2 published applications in this corpus.
Search patents in H02P- Granted patents
- 13
- Published applications
- 2
- Assignees
- 9
- Inventors
- 17
- Latest grant
- 8 Sep 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 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 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Closed control device for DC brush motor, control system, and control method8 Sep 2020US 10,770,995 B2Kabushiki Kaisha Toshiba
- System and method for speed control and stall protection combination for electric motors such as in engine cooling applications3 Feb 2009US 7,486,489 B2Siemens Canada Limited
- Shunt-type speed control circuit having transient storage effect for a series or compound motor30 Dec 1997US 5,703,448 A
- Electric vehicle speed control23 Jun 1987US 4,675,585 AOutboard Marine Corporation
- Speed sensitive field weakening control for traction motors7 Apr 1981US 4,260,937 AOutboard Marine Corporation
- Closed control device for dc brush motor, control system, and control method19 Sep 2019US 2019/0288622 A1Kabushiki Kaisha Toshiba
- System and method for speed control and stall protection combination for electric motors such as in engine cooling applications18 Nov 2004US 2004/0228051 A1Siemens VDO Automotive Corporation
Most cited
By later US patents
- Pulsed power supply23US 3,947,738 AReliance Electric Company · 1976
- Safety features for electric vehicle control23US 4,090,114 AWestinghouse Electric Corp. · 1978
- Feedback field control for an electric vehicle15US 3,989,990 AWestinghouse Electric Corp. · 1976
- Electric vehicle speed control12US 4,675,585 AOutboard Marine Corporation · 1987
- Separately excited D.C. motors7US 4,042,865 ASevcon Limited · 1977