H02P 23/03
Arrangements or methods for the control of ac motors characterised by a
Official title: specially adapted for very low speeds
H02P23/03 (Arrangements or methods for the control of ac motors characterised by a) appears on 73 US grants and 78 published applications in this corpus.
Search patents in H02P- Granted patents
- 73
- Published applications
- 78
- Assignees
- 64
- Inventors
- 184
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 2 | 4 |
| 2005 | 0 | 0 |
| 2006 | 3 | 2 |
| 2007 | 2 | 2 |
| 2008 | 2 | 2 |
| 2009 | 0 | 3 |
| 2010 | 0 | 2 |
| 2011 | 4 | 2 |
| 2012 | 2 | 4 |
| 2013 | 1 | 4 |
| 2014 | 8 | 5 |
| 2015 | 2 | 2 |
| 2016 | 4 | 5 |
| 2017 | 3 | 4 |
| 2018 | 1 | 2 |
| 2019 | 3 | 3 |
| 2020 | 6 | 13 |
| 2021 | 3 | 5 |
| 2022 | 12 | 7 |
| 2023 | 5 | 2 |
| 2024 | 1 | 1 |
| 2025 | 2 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and system for controlling an inverter for an electric machine4 Nov 2025US 12,463,577 B2GM Global Technology Operations LLC
- Double-reference pulse-width modulation for torque minimization of AC machines7 Oct 2025US 12,438,491 B2Huawei Digital Power Technologies Co., Ltd.
- Mode control method and system, and electronic device, and storage medium15 Oct 2024US 12,120,850 B2Zhejiang Sanhua Intelligent Controls Co., Ltd.
- Method for estimating the position of a rotor of a synchronous electrical machine17 Oct 2023US 11,791,755 B2Thales
- Low-speed sensorless brushless motor control in a power tool5 Sep 2023US 11,750,124 B2Black & Decker Inc.
- Angle adaption circuit and control system18 Jun 2026US 2026/0171945 A1Valeo Electrification
- Inverter control device, inverter control method thereof, and vehicle including same30 Apr 2026US 2026/0121572 A1Hyundai Motor Company
- Method of controlling motor restart in sensorless control in a power tool25 Dec 2025US 2025/0392240 A1Black & Decker Inc.
- Method and system for controlling an inverter for an electric machine14 Mar 2024US 2024/0088817 A1GM Global Technology Operations LLC
- Double-reference pulse-width modulation for torque minimization of ac machines28 Dec 2023US 2023/0421088 A1Huawei Digital Power Technologies Co., Ltd.
Most cited
By later US patents
- Torque controller in an electric motor1,028US 7,898,198 B2DRS Test & Energy Management, LLC · 2011
- Hand held variable speed drill motor and control system therefor220US 4,052,649 ALear Motors Corporation · 1977
- Electric boring tool40US 9,314,855 B2Hitachi Koki Co., Ltd. · 2016
- High-efficiency wheel-motor utilizing molded magnetic flux channels with transverse-flux stator30US 7,868,510 B22011
- Control method and means for efficient operation of brushless d-c motors over a wide range of operating conditions26US 4,207,510 ASRI International · 1980