H02P 7/2885
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}
H02P7/2885 (Whereby the speed is regulated by measuring the motor speed and comparing) appears on 76 US grants and 4 published applications in this corpus.
Search patents in H02P- Granted patents
- 76
- Published applications
- 4
- Assignees
- 55
- Inventors
- 115
- Latest grant
- 4 Nov 2008
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 6 | 0 |
| 1978 | 7 | 0 |
| 1979 | 6 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 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 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Fan speed control device and method detailed description of the invention4 Nov 2008US 7,447,423 B2Delta Electronics, Inc.
- Self-startup circuit for DC fan17 Apr 2007US 7,205,733 B2Hon Hai Precision Industry Co., Ltd.
- Motor driving system20 Sep 2005US 6,946,809 B2Asia Vital Components Co., Ltd.
- Drive system27 Jun 2000US 6,081,089 AAgfa-Gevaert
- Method and circuit arrangement for controlling fans24 Mar 1998US 5,731,671 ASiemens Nixdorf Informationssystems Aktiengesellschaft
- System and method for load torque disturbance rejection of brushed dc motors18 Sep 2025US 2025/0293625 A1
- Fan speed control device and method detailed description of the invention14 Jun 2007US 2007/0133956 A1Delta Electronics, Inc.
- Self-startup circuit for DC fan4 May 2006US 2006/0091837 A1Hon Hai Precision Industry Co., Ltd.
- Motor driving system31 Mar 2005US 2005/0067988 A1Asia Vital Components Co., Ltd.
Most cited
By later US patents
- Speed control system for small medical motors993US 4,494,057 AKabushiki Kaisha Morita Seisakusho · 1985
- Direct current motor speed control140US 4,893,067 ABlack & Decker Inc. · 1990
- Speed control for a motor28US 4,027,217 APertec Computer Corporation · 1977
- Coreless motor25US 3,993,920 AOlympus Optical Co., Ltd. · 1976
- DC Motor stall protection circuit22US 3,931,557 AGeneral Motors Corporation · 1976