H02P 21/20
Estimation of torque
H02P21/20 (Estimation of torque) appears on 257 US grants and 310 published applications in this corpus.
Search patents in H02P- Granted patents
- 257
- Published applications
- 310
- Assignees
- 162
- Inventors
- 754
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 2 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 3 | 3 |
| 2012 | 1 | 7 |
| 2013 | 3 | 8 |
| 2014 | 4 | 15 |
| 2015 | 12 | 23 |
| 2016 | 14 | 17 |
| 2017 | 18 | 15 |
| 2018 | 14 | 14 |
| 2019 | 22 | 19 |
| 2020 | 24 | 28 |
| 2021 | 20 | 23 |
| 2022 | 27 | 23 |
| 2023 | 17 | 25 |
| 2024 | 24 | 33 |
| 2025 | 28 | 28 |
| 2026 | 16 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Control device24 Sep 2026US 2026/0291415 A1Kabushiki Kaisha Toshiba
- System and method for surface-mounted permanent magnet motor control using peak torque24 Sep 2026US 2026/0291419 A1
- Calculation methods for motor electromagnetic torque and maximum torque per ampere, and motor control method based on vector magnetic circuit17 Sep 2026US 2026/0280459 A1North China Electric Power University (Baoding)
- Method of Determining Torque in a Mechanical Drivetrain27 Aug 2026US 2026/0254383 A1Rockwell Automation Technologies, Inc.
Most cited
By later US patents
- Four quadrant motor controller minimizing distortion index88US 5,585,708 AKenetech Windpower, Inc. · 1996
- Method for setting parameters of electronically-commutated motor for use as permanent-split capacitor motor83US 9,270,221 B2Zhongshan Broad-Ocean Motor Co., Ltd. · 2016
- Control system and method for a rotating electromagnetic machine66US 6,756,757 B2Emerson Electric Co. · 2004
- Method and apparatus for flux and torque sensing in electrical machines48US 4,724,373 AWisconsin Alumni Research Foundation · 1988
- System and method for controlling a motor in a catheter procedure system45US 10,709,510 B2Corindus, Inc. · 2020