H02P 23/22
Controlling the speed digitally using a reference oscillator, a speed proportional pulse
Official title: Controlling the speed digitally using a reference oscillator, a speed proportional pulse rate feedback and a digital comparator
H02P23/22 (Controlling the speed digitally using a reference oscillator, a speed proportional pulse) appears on 150 US grants and 67 published applications in this corpus.
Search patents in H02P- Granted patents
- 150
- Published applications
- 67
- Assignees
- 112
- Inventors
- 286
- Latest grant
- 29 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 5 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 9 | 0 |
| 1982 | 7 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 1 | 0 |
| 2009 | 1 | 2 |
| 2010 | 1 | 1 |
| 2011 | 1 | 2 |
| 2012 | 2 | 6 |
| 2013 | 6 | 15 |
| 2014 | 4 | 11 |
| 2015 | 9 | 11 |
| 2016 | 10 | 2 |
| 2017 | 3 | 0 |
| 2018 | 4 | 1 |
| 2019 | 1 | 4 |
| 2020 | 5 | 2 |
| 2021 | 2 | 1 |
| 2022 | 3 | 2 |
| 2023 | 3 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Motor controller circuit having stable speed controlling mechanism29 Aug 2023US 11,742,787 B1Anpec Electronics Corporation
- Power conversion device and electric motor drive system1 Aug 2023US 11,716,044 B2Toshiba Mitsubishi-Electric Industrial Systems Corporation
- Catch spin method for permanent magnet synchronous motor with sensorless field oriented control28 Feb 2023US 11,594,990 B2Infineon Technologies Austria AG
- Steering control device22 Nov 2022US 11,505,240 B2Jtekt Corporation
- Catch spin method for permanent magnet synchronous motor with sensorless field oriented control2 Aug 2022US 11,404,983 B2Infineon Technologies Austria AG
- Pulse width modulation signal generator and method7 May 2026US 2026/0128699 A1Infineon Technologies AG
- Motor controller with data bit expansion mechanism28 Aug 2025US 2025/0274062 A1Anpec Electronics Corporation
- Catch spin method for permanent magnet synchronous motor with sensorless field oriented control20 Oct 2022US 2022/0337183 A1Infineon Technologies Austria AG
- Power conversion device and electric motor drive system8 Sep 2022US 2022/0286076 A1Toshiba Mitsubishi-Electric Industrial Systems Corporation
- Catch spin method for permanent magnet synchronous motor with sensorless field oriented control8 Jul 2021US 2021/0211079 A1Infineon Technologies Austria AG
Most cited
By later US patents
- Motor system67US 4,779,031 AIntellico, Inc. · 1988
- Combination microprocessor and discrete element control system for a clock rate controlled electronically commutated motor62US 4,250,544 AGeneral Electric Company · 1981
- Stepper motor system44US 5,038,088 A1991
- Digital speed controller using a single-chip microcontroller40US 4,845,608 AGeneral Electric Company · 1989
- Digital DC motor velocity control system38US 3,950,682 AInternational Business Machines Corporation · 1976