H02P 23/04
Arrangements or methods for the control of ac motors characterised by a
Official title: specially adapted for damping motor oscillations, e.g. for reducing hunting
H02P23/04 (Arrangements or methods for the control of ac motors characterised by a) appears on 203 US grants and 271 published applications in this corpus.
Search patents in H02P- Granted patents
- 203
- Published applications
- 271
- Assignees
- 160
- Inventors
- 600
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 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 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 3 |
| 2006 | 1 | 6 |
| 2007 | 4 | 3 |
| 2008 | 3 | 7 |
| 2009 | 2 | 5 |
| 2010 | 4 | 6 |
| 2011 | 8 | 3 |
| 2012 | 4 | 3 |
| 2013 | 2 | 10 |
| 2014 | 9 | 6 |
| 2015 | 5 | 12 |
| 2016 | 12 | 13 |
| 2017 | 6 | 13 |
| 2018 | 12 | 8 |
| 2019 | 9 | 21 |
| 2020 | 13 | 24 |
| 2021 | 15 | 21 |
| 2022 | 16 | 13 |
| 2023 | 23 | 25 |
| 2024 | 21 | 24 |
| 2025 | 17 | 24 |
| 2026 | 12 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Processing device, electric-powered vehicle, processing method, and program11 Aug 2026US 12,706,555 B2Nippon Steel Corporation
- Method of reducing mechanical vibrations of a motor system11 Aug 2026US 12,706,556 B2ABB Schweiz AG
- Method of identifying parameters of a motor system11 Aug 2026US 12,706,557 B2ABB Schweiz AG
- Method for controlling an electric motor of a battery-operated electric vehicle, battery-operated electric vehicle and a control device for a battery-operated electric vehicle14 Jul 2026US 12,679,221 B2Bayerische Motoren Werke Aktiengesellschaft
- Motor control device and motor control method16 Jun 2026US 12,658,833 B2Hitachi Astemo, Ltd.
- Motor controller and motor control system1 Oct 2026US 2026/0302987 A1Mitsubishi Electric Corporation
- Motor control device10 Sep 2026US 2026/0269764 A1Astemo, Ltd.
- Ac motor control device and air conditioning device27 Aug 2026US 2026/0254387 A1Mitsubishi Electric Corporation
- Motor controller, positioning apparatus, and motor control method20 Aug 2026US 2026/0241560 A1Mitsubishi Electric Corporation
- Motor control device6 Aug 2026US 2026/0230022 A1Fanuc Corporation
Most cited
By later US patents
- Method for controlling an electric motor to reduce EMI43US 7,202,622 B2International Rectifier Corporation · 2007
- Method and apparatus for controlling PWM inverters35US 4,599,549 AHitachi, Ltd. · 1986
- Resistive torsional mode damping system and method34US 7,423,411 B2General Electric Company · 2008
- Pulsed electric machine control32US 11,088,644 B1Tula eTechnology, Inc. · 2021
- Damping control in a three-phase motor with a single current sensor21US 7,414,425 B2Temic Automotive of North America, Inc. · 2008