H02P 23/12
Observer control
Official title: Observer control, e.g. using Luenberger observers or Kalman filters
H02P23/12 (Observer control) appears on 127 US grants and 139 published applications in this corpus.
Search patents in H02P- Granted patents
- 127
- Published applications
- 139
- Assignees
- 100
- Inventors
- 334
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 2 | 2 |
| 2008 | 1 | 2 |
| 2009 | 0 | 2 |
| 2010 | 2 | 3 |
| 2011 | 2 | 3 |
| 2012 | 5 | 2 |
| 2013 | 1 | 4 |
| 2014 | 4 | 10 |
| 2015 | 4 | 7 |
| 2016 | 8 | 4 |
| 2017 | 5 | 13 |
| 2018 | 9 | 5 |
| 2019 | 12 | 16 |
| 2020 | 14 | 7 |
| 2021 | 9 | 11 |
| 2022 | 13 | 7 |
| 2023 | 13 | 12 |
| 2024 | 7 | 16 |
| 2025 | 8 | 6 |
| 2026 | 7 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for identifying brush type, cleaning device and storage medium15 Sep 2026US 12,733,783 B2Beijing Xiaomi Mobile Software Co., Ltd.
- Systems and methods for fault detection and control in an electric aircraft25 Aug 2026US 12,719,395 B2Beta Air, LLC
- Method for operating a drive unit of a vehicle operable by muscle power and/or motor power18 Aug 2026US 12,709,353 B2Robert Bosch GmbH
- Controller circuit of motor and control method7 Jul 2026US 12,676,566 B2Rohm Co., Ltd.
- Apparatus and method for determining a temperature of a rotor19 May 2026US 12,633,866 B2Robert Bosch GmbH
- Real-time parameter based obstacle detection1 Oct 2026US 2026/0297988 A1GM Global Technology Operations LLC
- Peak-to-peak ratio based obstacle detection1 Oct 2026US 2026/0302988 A1GM Global Technology Operations LLC
- Motor controller and method for estimating a motor shaft angle or a motor shaft rotation speed of a motor16 Jul 2026US 2026/0205041 A1Infineon Technologies AG
- Direct current estimation device, power conversion device, and direct current estimation method2 Jul 2026US 2026/0186031 A1Hitachi Astemo, Ltd.
- Luenberger current observer with adaptive gain for permanent magnet synchronous machines in automotive application18 Jun 2026US 2026/0171946 A1Magna International Inc.
Most cited
By later US patents
- Methods and apparatus for driving a transducer34US 11,139,767 B2Cirrus Logic, Inc. · 2021
- Method and apparatus for estimating angles in a synchronous machine22US 9,225,274 B2Robert Bosch GmbH · 2015
- Method for control regenerative braking of electric vehicle19US 7,654,620 B2Hyundai Motor Company · 2010
- System and method for controlling the speed of an electric motor in an extremely low speed range using a rotary pulse encoder14US 5,325,460 AMeidensha Corporation · 1994
- Methods and apparatuses for fault management in permanent magnet synchronous machines using the field reconstruction method13US 8,314,576 B2Board of Regents, The University of Texas System · 2012