H02P 21/18
Estimation of position or speed
H02P21/18 (Estimation of position or speed) appears on 952 US grants and 1,114 published applications in this corpus.
Search patents in H02P- Granted patents
- 952
- Published applications
- 1,114
- Assignees
- 432
- Inventors
- 2,036
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 4 |
| 2002 | 13 | 5 |
| 2003 | 11 | 14 |
| 2004 | 12 | 14 |
| 2005 | 6 | 10 |
| 2006 | 17 | 9 |
| 2007 | 12 | 22 |
| 2008 | 9 | 17 |
| 2009 | 9 | 15 |
| 2010 | 11 | 23 |
| 2011 | 15 | 16 |
| 2012 | 28 | 29 |
| 2013 | 16 | 26 |
| 2014 | 25 | 50 |
| 2015 | 41 | 43 |
| 2016 | 39 | 41 |
| 2017 | 39 | 38 |
| 2018 | 45 | 63 |
| 2019 | 56 | 85 |
| 2020 | 68 | 92 |
| 2021 | 70 | 90 |
| 2022 | 99 | 59 |
| 2023 | 84 | 95 |
| 2024 | 58 | 97 |
| 2025 | 89 | 90 |
| 2026 | 41 | 67 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Alternating current zero torque resistance heating18 Aug 2026US 12,709,192 B2GM Global Technology Operations LLC
- Power tool and control method thereof4 Aug 2026US 12,700,816 B2Nanjing Chervon Industry Co., Ltd.
- Method of identifying the parameters of a permanent magnet synchronous motor8 Oct 2026US 2026/0312518 A1Arol S.P.A.
- Rotary electric machine control device, electric power steering device, and vehicle8 Oct 2026US 2026/0312519 A1Mitsubishi Electric Mobility Corporation
- Control device and drive control method1 Oct 2026US 2026/0302981 A1Mitsubishi Electric Corporation
- Wide bandgap motor drive with field-operated-control for power tools1 Oct 2026US 2026/0302982 A1
- Forward and reverse rotation control circuit and method for sensorless motor, and motor controller1 Oct 2026US 2026/0302984 A1Crm Icbg (Wuxi) Co., Ltd.
Most cited
By later US patents
- Control device for electric motor412US 7,005,828 B2Nissan Motor Co., Ltd. · 2006
- Method of estimating a rotor position of synchronous motor, method of controlling synchronous motor with no position sensor and a controller of synchronous motor142US 6,396,229 B1Hitachi, Ltd. · 2002
- Motor torque control method and apparatus130US 5,334,923 AWisconsin Alumni Research Foundation · 1994
- Air gap flux measurement using stator third harmonic voltage and uses83US 5,272,429 AWisconsin Alumni Research Foundation · 1993
- System for speed-sensorless control of an induction machine76US 6,137,258 AGeneral Electric Company · 2000