H02P 25/18
With arrangements for switching the windings
Official title: with arrangements for switching the windings, e.g. with mechanical switches or relays
H02P25/18 (With arrangements for switching the windings) appears on 467 US grants and 523 published applications in this corpus.
Search patents in H02P- Granted patents
- 467
- Published applications
- 523
- Assignees
- 240
- Inventors
- 936
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 9 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 3 |
| 2003 | 1 | 2 |
| 2004 | 5 | 8 |
| 2005 | 5 | 10 |
| 2006 | 8 | 9 |
| 2007 | 6 | 12 |
| 2008 | 7 | 9 |
| 2009 | 8 | 9 |
| 2010 | 5 | 10 |
| 2011 | 7 | 14 |
| 2012 | 13 | 17 |
| 2013 | 8 | 22 |
| 2014 | 9 | 23 |
| 2015 | 18 | 12 |
| 2016 | 19 | 23 |
| 2017 | 23 | 21 |
| 2018 | 12 | 25 |
| 2019 | 28 | 36 |
| 2020 | 24 | 55 |
| 2021 | 50 | 31 |
| 2022 | 34 | 34 |
| 2023 | 22 | 39 |
| 2024 | 39 | 45 |
| 2025 | 34 | 25 |
| 2026 | 24 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H02P 25/184Wherein the motor speed is changed by switching from a delta to97
- H02P 25/188Wherein the motor windings are switched from series to parallel or vice90
- H02P 25/20For pole-changing82
- H02P 25/182Whereby the speed is regulated by using centrifucal devices8
- H02P 25/186Whereby the speed is regulated by using a periodic interrupter3
Recent patents
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- Systems and methods for configurable electrical inverter8 Sep 2026US 12,732,127 B2BorgWarner Inc.
- Drive system of working machine8 Oct 2026US 2026/0308868 A1
- Winding switching device and winding switching system1 Oct 2026US 2026/0298988 A1Autonetworks Technologies, Ltd.
- Dust collection apparatus, resin molding apparatus, and method for manufacturing resin molded product17 Sep 2026US 2026/0273596 A1Towa Corporation
- Modular variable pole electric motor system20 Aug 2026US 2026/0246322 A1GM Global Technology Operations LLC
- Work machine20 Aug 2026US 2026/0246408 A1Koki Holdings Co., Ltd.
Most cited
By later US patents
- Direct current motor with independently driven and switchable stators1,152US 8,575,880 B22013
- Controller for permanent magnet generator155US 5,625,276 AColeman Powermate, Inc. · 1997
- Load demand throttle control for portable generator and other applications88US 6,018,200 AColeman Powermate, Inc. · 2000
- Electric motor73US 6,788,022 B2A. O. Smith Corporation · 2004
- Self adapting motor controller63US 6,169,383 ASiemens Energy & Automation, Inc. · 2001