H02P 21/30
Direct torque control [dtc] or field acceleration method [fam]
Official title: Direct torque control [DTC] or field acceleration method [FAM]
H02P21/30 (Direct torque control [dtc] or field acceleration method [fam]) appears on 75 US grants and 68 published applications in this corpus.
Search patents in H02P- Granted patents
- 75
- Published applications
- 68
- Assignees
- 67
- Inventors
- 182
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 3 |
| 2003 | 3 | 1 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 2 | 3 |
| 2011 | 1 | 0 |
| 2012 | 3 | 2 |
| 2013 | 0 | 1 |
| 2014 | 2 | 2 |
| 2015 | 1 | 2 |
| 2016 | 5 | 9 |
| 2017 | 7 | 0 |
| 2018 | 0 | 2 |
| 2019 | 2 | 8 |
| 2020 | 7 | 8 |
| 2021 | 7 | 5 |
| 2022 | 7 | 4 |
| 2023 | 5 | 4 |
| 2024 | 3 | 7 |
| 2025 | 2 | 2 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bus current control method, device, system, and storage medium22 Sep 2026US 12,741,626 B2Geely Automobile Research Institute (Ningbo) Co., Ltd.
- Method and system for controlling an electric machine4 Aug 2026US 12,700,817 B2Volkswagen Aktiengesellschaft
- Motor control device, electromechanical integrated unit, hybrid system, electric power steering system, and motor control method30 Jun 2026US 12,668,228 B2Hitachi Astemo, Ltd.
- Method and apparatus for maintaining the rotor D flux for pulsing induction machines and electrically excited synchronous electric machines17 Feb 2026US 12,556,118 B2Tula eTechnology, Inc.
- Motor control apparatus30 Dec 2025US 12,512,774 B2Sanyo Denki Co., Ltd.
- Electrical apparatuses and methods3 Sep 2026US 2026/0261222 A1Thermo King Corporation
- Method and apparatus for maintaining the rotor d flux for pulsing induction machines and electrically excited synchronous electric machines30 Jul 2026US 2026/0221914 A1Tula eTechnology, Inc.
- Motor control device14 Aug 2025US 2025/0260353 A1Kabushiki Kaisha Toshiba
- Electronic pole-changing for induction motors6 Feb 2025US 2025/0047226 A1The Board of Trustees of the University of Illinois
- Control scheme for starting dual channel permanent magnet motor drive system under ossc fault of one channel21 Nov 2024US 2024/0388232 A1Goodrich Actuation Systems Limited
Most cited
By later US patents
- Sensorless control system for induction motor employing direct torque and flux regulation34US 6,433,506 B1Ford Global Technologies, LLC · 2002
- Controller for a wound rotor slip ring induction machine32US 6,448,735 B1ABB Automation Inc. · 2002
- Controller for a wound rotor slip ring induction machine23US 6,741,059 B2ABB Automation Inc. · 2004
- Direct torque control inverter arrangement15US 6,094,364 AABB Industry Oy · 2000
- Method for controlling the torque of a synchronous machine supplied by a frequency converter14US 4,920,306 AABB Stromberg Drives OY · 1990