H02K 21/38
Synchronous motors having permanent magnets: with rotating flux distributors, and armatures and
Official title: with rotating flux distributors, and armatures and magnets both stationary
H02K21/38 (Synchronous motors having permanent magnets: with rotating flux distributors, and armatures and) appears on 323 US grants and 276 published applications in this corpus.
Search patents in H02K- Granted patents
- 323
- Published applications
- 276
- Assignees
- 188
- Inventors
- 595
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 8 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 8 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 9 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 6 | 0 |
| 2002 | 4 | 3 |
| 2003 | 5 | 10 |
| 2004 | 7 | 2 |
| 2005 | 4 | 4 |
| 2006 | 2 | 5 |
| 2007 | 1 | 10 |
| 2008 | 4 | 11 |
| 2009 | 7 | 18 |
| 2010 | 6 | 18 |
| 2011 | 16 | 11 |
| 2012 | 11 | 13 |
| 2013 | 4 | 16 |
| 2014 | 13 | 20 |
| 2015 | 10 | 11 |
| 2016 | 12 | 18 |
| 2017 | 9 | 17 |
| 2018 | 13 | 16 |
| 2019 | 20 | 10 |
| 2020 | 22 | 17 |
| 2021 | 13 | 9 |
| 2022 | 11 | 10 |
| 2023 | 6 | 15 |
| 2024 | 14 | 8 |
| 2025 | 11 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Axial air gap electric rotary motor25 Aug 2026US 12,719,341 B2Moog Inc.
- Bearingless split teeth flux reversal motor23 Jun 2026US 12,665,478 B2Massachusetts Institute of Technology
- Motorized scroll wheel for an input device25 Nov 2025US 12,481,380 B2Logitech Europe S. A.
- Optical element exchange unit4 Nov 2025US 12,463,519 B2Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
- Permanent magnet-type rotary electric machine30 Sep 2025US 12,431,776 B2Mitsubishi Electric Corporation
- Switched reluctance motor comprising permanent magnets14 May 2026US 2026/0135453 A1
- Electric current generation apparatus with improved efficiency24 Apr 2025US 2025/0132650 A1
- A generator and a method for generating electricity with a generator20 Mar 2025US 2025/0092852 A1Ori Solution Oy
- System and method for permanent magnet assisted synchronous reluctance motor control from zero or low speed20 Feb 2025US 2025/0062668 A1Wolong Electric Group Co., Ltd.
- Axial Flux Motor25 Jul 2024US 2024/0250568 A1Carnegie Mellon University
Most cited
By later US patents
- Electrical machine82US 6,664,704 B22003
- Permanent magnet variable reluctance generator77US 4,639,626 AMagnetics Research International Corporation · 1987
- Electric power generators having like numbers of magnets and coils77US 5,184,040 A1993
- Synchronous motor75US 4,206,374 AU. S. Philips Corporation · 1980
- Methods for controlling the path of magnetic flux from a permanent magnet and devices incorporating the same68US 6,342,746 B12002