H02P 21/141
Flux estimation
Official title: {Flux estimation}
H02P21/141 (Flux estimation) appears on 340 US grants and 333 published applications in this corpus.
Search patents in H02P- Granted patents
- 340
- Published applications
- 333
- Assignees
- 188
- Inventors
- 728
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 2 |
| 2003 | 7 | 5 |
| 2004 | 7 | 7 |
| 2005 | 4 | 3 |
| 2006 | 4 | 5 |
| 2007 | 5 | 6 |
| 2008 | 6 | 5 |
| 2009 | 2 | 7 |
| 2010 | 5 | 2 |
| 2011 | 3 | 5 |
| 2012 | 6 | 9 |
| 2013 | 6 | 11 |
| 2014 | 10 | 10 |
| 2015 | 6 | 24 |
| 2016 | 23 | 19 |
| 2017 | 19 | 15 |
| 2018 | 23 | 17 |
| 2019 | 14 | 20 |
| 2020 | 27 | 23 |
| 2021 | 21 | 19 |
| 2022 | 18 | 23 |
| 2023 | 18 | 23 |
| 2024 | 22 | 37 |
| 2025 | 25 | 16 |
| 2026 | 17 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Synchronous machine control device, synchronous machine control method, and electric vehicle6 Oct 2026US 12,756,341 B2Hitachi Astemo, Ltd.
- Method for controlling a three-phase electric machine and control unit and system thereof29 Sep 2026US 12,749,994 B2Politecnico Di Torino
- Determining a permanent magnet flux state22 Sep 2026US 12,744,481 B2Schneider Toshiba Inverter Europe SAS
- Method and system for controlling an electric machine4 Aug 2026US 12,700,817 B2Volkswagen Aktiengesellschaft
- Model predictive control for electrical machines with multiple sets of windings23 Jun 2026US 12,665,532 B2ABB Schweiz AG
- Method of identifying the parameters of a permanent magnet synchronous motor8 Oct 2026US 2026/0312518 A1Arol S.P.A.
- Electrical apparatuses and methods3 Sep 2026US 2026/0261222 A1Thermo King Corporation
- Method for Identifying the Spatial Harmonic Flux-Map of a Synchronous Electrical Machine, and Method for Torque Ripple Map Evaluation Without Torque Measurement13 Aug 2026US 2026/0238148 A1Politecnico Di Torino
- Noise reduction circuitry6 Aug 2026US 2026/0230019 A1
- Motor driving apparatus and method for controlling the same2 Jul 2026US 2026/0189164 A1Hyundai Motor Company
Most cited
By later US patents
- Method and apparatus for transducerless position and velocity estimation in drives for AC machines138US 5,585,709 AWisconsin Alumni Research Foundation · 1996
- Motor torque control method and apparatus130US 5,334,923 AWisconsin Alumni Research Foundation · 1994
- Method and apparatus for transducerless position and velocity estimation in drives for AC machines124US 5,565,752 AWisconsin Alumni Research Foundation · 1996
- Method and control apparatus for controlling an AC-machine105US 5,708,346 ALust Antriebstechnik GmbH · 1998
- Air gap flux measurement using stator third harmonic voltage and uses83US 5,272,429 AWisconsin Alumni Research Foundation · 1993