H02P 21/12
Stator flux based control involving the use of rotor position or rotor
Official title: Stator flux based control involving the use of rotor position or rotor speed sensors
H02P21/12 (Stator flux based control involving the use of rotor position or rotor) appears on 109 US grants and 106 published applications in this corpus.
Search patents in H02P- Granted patents
- 109
- Published applications
- 106
- Assignees
- 79
- Inventors
- 284
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 4 | 2 |
| 2003 | 4 | 0 |
| 2004 | 0 | 2 |
| 2005 | 2 | 1 |
| 2006 | 3 | 0 |
| 2007 | 3 | 4 |
| 2008 | 3 | 4 |
| 2009 | 0 | 2 |
| 2010 | 3 | 4 |
| 2011 | 1 | 2 |
| 2012 | 2 | 4 |
| 2013 | 7 | 5 |
| 2014 | 4 | 6 |
| 2015 | 1 | 4 |
| 2016 | 8 | 7 |
| 2017 | 7 | 6 |
| 2018 | 3 | 5 |
| 2019 | 7 | 8 |
| 2020 | 7 | 7 |
| 2021 | 7 | 8 |
| 2022 | 12 | 6 |
| 2023 | 2 | 4 |
| 2024 | 3 | 3 |
| 2025 | 3 | 6 |
| 2026 | 0 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Concentrated-winding electrical machines with floating exciter25 Nov 2025US 12,483,172 B2Magstöm AB
- System and method for controlling an electric motor without a position sensor11 Mar 2025US 12,249,932 B2Mitsubishi Electric Research Laboratories, Inc.
- Method for estimating the electromagnetic torque of a synchronous electric machine18 Feb 2025US 12,231,064 B2Ampere S.A.S.
- Induction motor and controller device therefor12 Nov 2024US 12,143,052 B2
- Riding lawn mower4 Jun 2024US 11,999,240 B2Nanjing Chervon Industry Co., Ltd.
- Method for operating an inverter, inverter, and domestic appliance3 Sep 2026US 2026/0261221 A1BSH Hausgeräte GmbH
- Power tool including a shaftless motor27 Aug 2026US 2026/0254380 A1
- Systems and methods to perform limited-motion alignment of brushless dc motors in welding wire feeders18 Jun 2026US 2026/0171939 A1Illinois Tool Works Inc.
- Safe start of an ac motor7 May 2026US 2026/0128694 A1ABB Schweiz AG
- Motor control device and motor control method12 Mar 2026US 2026/0074639 A1Denso Corporation
Most cited
By later US patents
- Position sensorless control algorithm for AC machine36US 6,924,617 B2General Motors Corporation · 2005
- Enhanced floating reference frame controller for sensorless control of synchronous machines22US 7,193,383 B2Honeywell International Inc. · 2007
- Direct self-control of the flux and rotary moment of a rotary-field machine20US 4,678,248 ABrown, Boveri & Cie AG · 1987
- Control device for induction motor18US 6,194,864 B1Mitsubishi Denki Kabushiki Kaisha · 2001
- Procedure for the regulation of an asynchronous motor17US 5,194,797 AKone Elevator GmbH · 1993