H02P 21/10
Direct field-oriented control
Official title: Direct field-oriented control; Rotor flux feed-back control
H02P21/10 (Direct field-oriented control) appears on 119 US grants and 98 published applications in this corpus.
Search patents in H02P- Granted patents
- 119
- Published applications
- 98
- Assignees
- 65
- Inventors
- 235
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 5 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 3 |
| 2006 | 4 | 3 |
| 2007 | 2 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 1 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 3 |
| 2015 | 3 | 7 |
| 2016 | 2 | 5 |
| 2017 | 3 | 0 |
| 2018 | 4 | 4 |
| 2019 | 7 | 7 |
| 2020 | 2 | 11 |
| 2021 | 10 | 12 |
| 2022 | 11 | 9 |
| 2023 | 12 | 12 |
| 2024 | 9 | 7 |
| 2025 | 11 | 5 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Field-oriented sensorless brushless motor control in a power tool30 Jun 2026US 12,671,355 B2Black & Decker Inc.
- Electric machine system26 May 2026US 12,640,673 B2
- Adjustable phase advance for PM motor control21 Oct 2025US 12,451,826 B2Goodrich Control Systems Limited
- Synchronous machine control device, synchronous machine control method, and electric vehicle14 Oct 2025US 12,445,074 B2Hitachi Astemo, Ltd.
- Drive signal generation for motor7 Oct 2025US 12,438,485 B2Infineon Technologies Austria AG
- Electric machine system10 Sep 2026US 2026/0269757 A1IHI Corporation
- Method and System for Early Detection of Abnormalities in Motor Ball Bearings28 May 2026US 2026/0147044 A1Richtek Technology Corporation
- Synchronous Machine Control Device, Synchronous Machine Control Method, and Electric Vehicle15 Jan 2026US 2026/0019020 A1Hitachi Astemo, Ltd.
- Method of controlling motor restart in sensorless control in a power tool25 Dec 2025US 2025/0392240 A1Black & Decker Inc.
- Field oriented control with adaptive start27 Nov 2025US 2025/0364930 A1
Most cited
By later US patents
- Torque regulating induction motor system79US 4,023,083 AGeneral Electric Company · 1977
- Method and apparatus to regulate loads48US 6,982,533 B2Rockwell Automation Technologies, Inc. · 2006
- Variable-flux motor drive system42US 8,552,678 B2Kabushiki Kaisha Toshiba · 2013
- Current/voltage control apparatus for elevator system34US 6,009,003 ALG Industrial Systems Co., Ltd. · 1999
- Method and apparatus for controlling variable speed, controlled current induction motor drive systems30US 4,044,285 AGeneral Electric Company · 1977