H02P 21/0089
Using field weakening
Official title: {using field weakening}
H02P21/0089 (Using field weakening) appears on 279 US grants and 308 published applications in this corpus.
Search patents in H02P- Granted patents
- 279
- Published applications
- 308
- Assignees
- 144
- Inventors
- 681
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 2 | 4 |
| 2005 | 3 | 2 |
| 2006 | 3 | 6 |
| 2007 | 3 | 9 |
| 2008 | 6 | 14 |
| 2009 | 8 | 14 |
| 2010 | 6 | 18 |
| 2011 | 11 | 21 |
| 2012 | 20 | 19 |
| 2013 | 21 | 15 |
| 2014 | 22 | 14 |
| 2015 | 15 | 17 |
| 2016 | 16 | 11 |
| 2017 | 14 | 7 |
| 2018 | 9 | 17 |
| 2019 | 13 | 10 |
| 2020 | 12 | 20 |
| 2021 | 13 | 20 |
| 2022 | 21 | 19 |
| 2023 | 14 | 18 |
| 2024 | 17 | 13 |
| 2025 | 14 | 9 |
| 2026 | 8 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Adaptive nut removal mode in a power tool6 Oct 2026US 12,752,406 B2Milwaukee Electric Tool Corporation
- Power tool dynamic motor field weakening system and method14 Jul 2026US 12,678,925 B2Milwaukee Electric Tool Corporation
- Flux weakening for a single phase linear compressor16 Jun 2026US 12,656,038 B1Haier US Appliance Solutions, Inc.
- Systems and methods for power sharing control for direct integration of fuel cells in a dual-inverter EV drivetrain19 May 2026US 12,630,025 B2Eleappower Ltd.
- Motor driving apparatus and method of controlling the same27 Jan 2026US 12,537,470 B2Hyundai Motor Company
- Power tool dynamic motor field weakening system and method8 Oct 2026US 2026/0307231 A1Milwaukee Electric Tool Corporation
- Pmsm flux weakening for appliance motors10 Sep 2026US 2026/0269753 A1Haier US Appliance Solutions, Inc.
- Power tool with high and low field weakening states27 Aug 2026US 2026/0249439 A1
- Power tool including a shaftless motor27 Aug 2026US 2026/0254380 A1
- Electric machine, method for producing a mechanical magnetic-field-attenuating mechanism, mechanical magnetic-field-attenuating mechanism, and kit of parts6 Aug 2026US 2026/0229975 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- Method for controlling a permanent magnet motor95US 6,605,912 B1Delphi Technologies, Inc. · 2003
- Electronically commutated motor and control system employing phase angle control of phase current66US 7,821,217 B2Black & Decker Inc. · 2010
- Motor driving apparatus64US 7,176,644 B2Matsushita Electric Industrial Co., Ltd. · 2007
- Large capacity variable speed PWM spatial vector type sub-harmonic system for driving AC electric motor54US 5,298,848 AHitachi, Ltd. · 1994
- Circuit for driving permanent-magnet synchronous motor using proportional controller53US 5,656,911 AFuji Electric Co., Ltd. · 1997