H02P 21/13
Observer control
Official title: Observer control, e.g. using Luenberger observers or Kalman filters
H02P21/13 (Observer control) appears on 242 US grants and 281 published applications in this corpus.
Search patents in H02P- Granted patents
- 242
- Published applications
- 281
- Assignees
- 177
- Inventors
- 662
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 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 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 4 |
| 2004 | 1 | 1 |
| 2005 | 2 | 2 |
| 2006 | 1 | 1 |
| 2007 | 1 | 2 |
| 2008 | 1 | 3 |
| 2009 | 2 | 5 |
| 2010 | 2 | 1 |
| 2011 | 3 | 3 |
| 2012 | 4 | 6 |
| 2013 | 5 | 9 |
| 2014 | 5 | 8 |
| 2015 | 9 | 9 |
| 2016 | 7 | 10 |
| 2017 | 7 | 9 |
| 2018 | 9 | 17 |
| 2019 | 19 | 22 |
| 2020 | 21 | 29 |
| 2021 | 31 | 26 |
| 2022 | 29 | 24 |
| 2023 | 26 | 21 |
| 2024 | 9 | 25 |
| 2025 | 23 | 25 |
| 2026 | 16 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for controlling a three-phase electric machine and control unit and system thereof29 Sep 2026US 12,749,994 B2Politecnico Di Torino
- State estimation for controlling a drive machine without sensors22 Sep 2026US 12,744,480 B2Bayerische Motoren Werke Aktiengesellschaft
- Motor control22 Sep 2026US 12,744,482 B2ZF Automotive UK Limited
- Control of a regenerative brake for a motor system and related systems, methods, and devices1 Sep 2026US 12,722,500 B2Microchip Technology Incorporated
- Enhanced I/F control system and method for permanent magnet synchronous machines1 Sep 2026US 12,726,145 B2MAGNA Powertrain AG & Co KG
- Robust predictive current control method for synchronous motor with synchronous space vector modulation1 Oct 2026US 2026/0302983 A1North China University of Technology
- Forward and reverse rotation control circuit and method for sensorless motor, and motor controller1 Oct 2026US 2026/0302984 A1Crm Icbg (Wuxi) Co., Ltd.
- Establishment method for analysis model of motor and control method based on vector magnetic circuit coordinate transformation24 Sep 2026US 2026/0291416 A1North China Electric Power University (Baoding)
- Motor closed-loop detection circuit and method27 Aug 2026US 2026/0254386 A1Crm Icbg (Wuxi) Co., Ltd.
- System and method for compensating for electromechanical oscillation angle in a motor drive6 Aug 2026US 2026/0230015 A1Nidec Motor Corporation
Most cited
By later US patents
- Portable controller with integral power source for mechanical circulation support systems74US 8,556,795 B2Minnetronix, Inc. · 2013
- Portable controller with integral power source for mechanical circulation support systems71US 8,956,275 B2Minnetronix, Inc. · 2015
- Method and apparatus for transducerless flux estimation in drives for induction machines57US 5,559,419 AWisconsin Alumni Research Foundation · 1996
- Induction motor control system with speed and flux estimation43US 6,014,006 AFord Global Technologies, LLC · 2000
- Methods and apparatus for driving a transducer34US 11,139,767 B2Cirrus Logic, Inc. · 2021