H02P 21/04
Arrangements or methods for the control of electric machines by vector control
Official title: specially adapted for very low speeds
H02P21/04 (Arrangements or methods for the control of electric machines by vector control) appears on 98 US grants and 103 published applications in this corpus.
Search patents in H02P- Granted patents
- 98
- Published applications
- 103
- Assignees
- 66
- Inventors
- 230
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 3 |
| 2003 | 2 | 2 |
| 2004 | 4 | 2 |
| 2005 | 2 | 6 |
| 2006 | 7 | 3 |
| 2007 | 3 | 5 |
| 2008 | 4 | 7 |
| 2009 | 4 | 5 |
| 2010 | 2 | 3 |
| 2011 | 2 | 11 |
| 2012 | 11 | 3 |
| 2013 | 1 | 4 |
| 2014 | 10 | 5 |
| 2015 | 3 | 7 |
| 2016 | 2 | 1 |
| 2017 | 7 | 4 |
| 2018 | 3 | 5 |
| 2019 | 4 | 6 |
| 2020 | 3 | 7 |
| 2021 | 4 | 4 |
| 2022 | 8 | 2 |
| 2023 | 2 | 2 |
| 2024 | 1 | 0 |
| 2025 | 1 | 2 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Double-reference pulse-width modulation for torque minimization of AC machines7 Oct 2025US 12,438,491 B2Huawei Digital Power Technologies Co., Ltd.
- Motor control device and motor control method8 Oct 2024US 12,113,461 B2Aisin Corporation
- Method for estimating the position of a rotor of a synchronous electrical machine17 Oct 2023US 11,791,755 B2Thales
- Method and device for load-free determining of load-dependent positioning parameters of a synchronous machine without a position sensor2 May 2023US 11,641,172 B2KOSTAL Drives Technology GmbH
- Motor controller and electric power steering apparatus20 Dec 2022US 11,529,993 B2Mitsubishi Electric Corporation
- Powering and controlling an electric brushless motor in a power tool with a dual mode motor control13 Aug 2026US 2026/0238084 A1Robbox Inc.
- Control device13 Aug 2026US 2026/0238150 A1Kabushiki Kaisha Toyota Jidoshokki
- Semiconductor device and motor control program13 Aug 2026US 2026/0238151 A1Renesas Electronics Corporation
- Angle adaption circuit and control system18 Jun 2026US 2026/0171945 A1Valeo Electrification
- System and method for increasing maximum motor torque at zero speed and low speeds18 Dec 2025US 2025/0385627 A1Dana Heavy Vehicle Systems Group, LLC
Most cited
By later US patents
- Sensorless controller of AC motor and control method68US 7,045,988 B2Kabushiki Kaisha Yaskawa Denki · 2006
- Method of controlling inverter-driven induction motor49US 4,680,526 AHitachi, Ltd. · 1987
- Motor driving device and automobile using the same39US 7,439,697 B2Hitachi, Ltd. · 2008
- Sensorless control method and apparatus of permanent magnet synchronous motor37US 6,081,093 AKabushiki Kaisha Yaskawa Denki · 2000
- Method for measuring characteristic constants of alternating current motor and controller thereof based on said method31US 5,475,293 AHitachi, Ltd. · 1995