H02P 7/2815
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}
H02P7/2815 (Whereby the speed is regulated by measuring the motor speed and comparing) appears on 31 US grants and 3 published applications in this corpus.
Search patents in H02P- Granted patents
- 31
- Published applications
- 3
- Assignees
- 20
- Inventors
- 60
- Latest grant
- 25 Oct 2016
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Motor driving device25 Oct 2016US 9,479,093 B2Nidec Servo Corporation
- Sensorless measurement of positioning travel, especially on an electromotively operated parking brake30 Jun 2009US 7,555,401 B2Lucas Automotive GmbH
- Reversible DC motor drive including a DC/DC converter and four quadrant DC/DC controller23 Mar 2004US 6,710,574 B2Eaton Corporation
- Reduced common voltage in a DC matrix converter26 Dec 2000US 6,166,930 AOtis Elevator Company
- PWM speed-control apparatus for elevators3 Aug 1999US 5,932,979 A
- Motor driving device26 Feb 2015US 2015/0054435 A1Nidec Servo Corporation
- Sensorless Measurement of Positioning Travel, Especially on an Electromotively Operated Parking Brake3 Jan 2008US 2008/0004832 A1Lucas Automotive GmbH
- Reversible DC motor drive including a DC/DC converter and four quadrant DC/DC controller27 Mar 2003US 2003/0057916 A1Eaton Corporation
Most cited
By later US patents
- Four quadrant unipolar pulse width modulated inverter97US 5,428,522 AKaman Electromagnetics Corporation · 1995
- Electric wheelchair with speed control circuit70US 4,387,325 AInvacare Corporation · 1983
- Electric wheelchair with improved control circuit69US 4,511,825 AInvacare Corporation · 1985
- Electric wheelchair with improved control circuit55US 4,634,941 AInvacare Corporation · 1987
- Chopper type propulsion system with low speed electrical braking capability for traction vehicles32US 4,284,936 AGeneral Electric Company · 1981