H02P 7/2805
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}
H02P7/2805 (Whereby the speed is regulated by measuring the motor speed and comparing) appears on 74 US grants and 44 published applications in this corpus.
Search patents in H02P- Granted patents
- 74
- Published applications
- 44
- Assignees
- 64
- Inventors
- 161
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 3 |
| 2002 | 2 | 2 |
| 2003 | 2 | 2 |
| 2004 | 3 | 3 |
| 2005 | 3 | 2 |
| 2006 | 3 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 3 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 4 |
| 2012 | 1 | 0 |
| 2013 | 3 | 2 |
| 2014 | 1 | 2 |
| 2015 | 4 | 2 |
| 2016 | 3 | 1 |
| 2017 | 0 | 4 |
| 2018 | 2 | 5 |
| 2019 | 6 | 2 |
| 2020 | 2 | 1 |
| 2021 | 1 | 2 |
| 2022 | 1 | 1 |
| 2023 | 2 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Back-drive of motor based on position data16 Dec 2025US 12,498,796 B1Amazon Technologies, Inc.
- Fan controller6 Aug 2024US 12,058,836 B2TDK-Lambda UK Limited
- Fan control circuit with temperature compensation and method of controlling fan22 Aug 2023US 11,736,052 B2Enermax Technology Corporation
- Back-drive of motor based on position data7 Feb 2023US 11,573,647 B1Amazon Technologies, Inc.
- Contactless power supply and motor control system6 Dec 2022US 11,522,477 B2Honeywell International Inc.
- Contactless power supply and motor control system14 Jul 2022US 2022/0224263 A1Honeywell International s.r.o.
- Fan controller25 Nov 2021US 2021/0368649 A1TDK-Lambda UK Limited
- Fan control circuit with temperature compensation and method of controlling fan7 Oct 2021US 2021/0315129 A1Enermax Technology Corporation
- Ripple counting filtering and peak detection method and system11 Jun 2020US 2020/0186062 A1Magna Closures Inc.
- Motor drive system including power storage device16 May 2019US 2019/0149073 A1Fanuc Corporation
Most cited
By later US patents
- Apparatus for DC motor position detection with capacitive ripple current extraction1,036US 7,064,509 B1Visteon Global Technologies, Inc. · 2006
- Method for ensuring constant speed of a motor in an injection device79US 7,993,300 B2Novo Nordisk · 2011
- Method for establishing the rotational speed of mechanically commutated d.c. motors34US 6,144,179 ATemic Telefunken microelectronic GmbH · 2000
- System and method for velocity control of a D.C. Motor25US 5,811,946 ALockheed Martin Corporation · 1998
- System and method for determining position or speed of a commutated DC motor with error correction20US 7,668,690 B2Delphi Technologies, Inc. · 2010