H02K 1/223
Rotor cores with windings and permanent magnets
Official title: {Rotor cores with windings and permanent magnets (for additional excitation in synchronous motors or generators H02K21/042; in synchronous motors having additional short-circuited winding for starting as an asynchronous motor H02K21/46)}
H02K1/223 (Rotor cores with windings and permanent magnets) appears on 129 US grants and 162 published applications in this corpus.
Search patents in H02K- Granted patents
- 129
- Published applications
- 162
- Assignees
- 89
- Inventors
- 369
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 2 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 5 |
| 2009 | 0 | 3 |
| 2010 | 2 | 10 |
| 2011 | 5 | 3 |
| 2012 | 4 | 2 |
| 2013 | 2 | 7 |
| 2014 | 4 | 13 |
| 2015 | 8 | 4 |
| 2016 | 4 | 6 |
| 2017 | 6 | 3 |
| 2018 | 8 | 22 |
| 2019 | 18 | 16 |
| 2020 | 13 | 11 |
| 2021 | 9 | 6 |
| 2022 | 10 | 12 |
| 2023 | 7 | 8 |
| 2024 | 10 | 12 |
| 2025 | 4 | 5 |
| 2026 | 5 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Electric motors17 Sep 2026US 2026/0280367 A1Tau Motors, Inc.
- Permanent magnet assisted wound field machine10 Sep 2026US 2026/0269667 A1GM Global Technology Operations LLC
- Electric machine with integrated rotor27 Aug 2026US 2026/0254301 A1
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Most cited
By later US patents
- Rotating electrical machine with electromagnetic and permanent magnet excitation101US 5,663,605 AFord Motor Company · 1997
- Permanent magnet electrical rotating machine, wind power generating system, and a method of magnetizing a permanent magnet22US 7,847,456 B2Hitachi, Ltd. · 2010
- Method for providing tooth halves with removable tooth tips for an electrical machine18US 8,069,550 B2Siemens Aktiengesellschaft · 2011
- Permanent magnet electrical rotating machine, wind power generating system, and a method of magnetizing a permanent magnet15US 7,994,666 B2Hitachi, Ltd. · 2011
- Rotational angle detection device and method for permanent magnet dynamo-electric machine and electric power steering device15US 8,324,768 B2Mitsubishi Electric Corporation · 2012