H02K 21/00
Synchronous motors having permanent magnets
Official title: Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
H02K21/00 (Synchronous motors having permanent magnets) appears on 6,802 US grants and 7,666 published applications in this corpus.
Search patents in H02K- Granted patents
- 6,802
- Published applications
- 7,666
- Assignees
- 2,263
- Inventors
- 11,760
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 21 | 0 |
| 1977 | 20 | 0 |
| 1978 | 16 | 0 |
| 1979 | 9 | 0 |
| 1980 | 22 | 0 |
| 1981 | 19 | 0 |
| 1982 | 27 | 0 |
| 1983 | 14 | 0 |
| 1984 | 27 | 0 |
| 1985 | 24 | 0 |
| 1986 | 24 | 0 |
| 1987 | 58 | 0 |
| 1988 | 36 | 0 |
| 1989 | 48 | 0 |
| 1990 | 36 | 0 |
| 1991 | 44 | 0 |
| 1992 | 44 | 0 |
| 1993 | 49 | 0 |
| 1994 | 54 | 0 |
| 1995 | 45 | 0 |
| 1996 | 58 | 0 |
| 1997 | 77 | 0 |
| 1998 | 126 | 0 |
| 1999 | 115 | 0 |
| 2000 | 111 | 0 |
| 2001 | 98 | 32 |
| 2002 | 106 | 144 |
| 2003 | 87 | 115 |
| 2004 | 151 | 163 |
| 2005 | 128 | 167 |
| 2006 | 135 | 199 |
| 2007 | 89 | 188 |
| 2008 | 104 | 200 |
| 2009 | 135 | 240 |
| 2010 | 159 | 270 |
| 2011 | 189 | 232 |
| 2012 | 160 | 233 |
| 2013 | 176 | 264 |
| 2014 | 161 | 288 |
| 2015 | 159 | 235 |
| 2016 | 169 | 261 |
| 2017 | 216 | 363 |
| 2018 | 212 | 357 |
| 2019 | 368 | 477 |
| 2020 | 373 | 504 |
| 2021 | 360 | 497 |
| 2022 | 401 | 525 |
| 2023 | 353 | 494 |
| 2024 | 474 | 526 |
| 2025 | 441 | 424 |
| 2026 | 274 | 268 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H02K 21/12Synchronous motors having permanent magnets: with stationary armatures and rotating magnets5,629
- H02K 21/02Details980
- H02K 21/38Synchronous motors having permanent magnets: with rotating flux distributors, and armatures and323
- H02K 21/46Motors having additional short-circuited winding for starting as an asynchronous motor153
- H02K 21/26Synchronous motors having permanent magnets: with rotating armatures and stationary magnets120
- H02K 21/48Generators with two or more outputs81
Recent patents
- Stator arrangement for a radial flux motor6 Oct 2026US 12,756,248 B2BorgWarner Inc.
- Rotor apparatus for an electric machine6 Oct 2026US 12,756,251 B2Jaguar Land Rover Limited
- Coil assembly of an integrated motor pump or turbine having reduced thermal stress at cryogenic temperatures6 Oct 2026US 12,756,257 B2Flowserve Pte. Ltd.
- Electric machine6 Oct 2026US 12,756,284 B2Schaeffler Technologies AG & Co. KG
- Electric propulsion device with hollow shaft and cooling blades and support body with heat member on outer surface29 Sep 2026US 12,747,029 B2Mitsubishi Heavy Industries, Ltd.
- Power tool with compact motor assembly8 Oct 2026US 2026/0307221 A1Black & Decker Inc.
- Rotary electric machine8 Oct 2026US 2026/0312442 A1Denso Corporation
- Rotor, motor, and electronic device8 Oct 2026US 2026/0312448 A1MINEBEA MITSUMI Inc.
- Engine cooling fan motor for vehicle8 Oct 2026US 2026/0312466 A1New Motech Co., Ltd.
- Thixotropic potting compound for fixing a permanent magnet in a rotor of a permanently excited synchronous machine8 Oct 2026US 2026/0312472 A1Innomotics GmbH
Most cited
By later US patents
- Rotary and linear motor1,441US 6,429,611 B12002
- Methods and apparatus for increasing power of permanent magnet motors1,432US 6,777,838 B22004
- Electric machine having an integrally continuous stator winding and stator slot bridges1,193US 6,936,948 B2Pratt & Whitney Canada Corp. · 2005
- Architecture for electric machine1,149US 7,583,063 B2Pratt & Whitney Canada Corp. · 2009
- Method and apparatus for cardiac blood flow assistance452US 5,964,694 AGuidant Corporation · 1999