H02K 21/028
By modifying the magnetic circuit within the field or the armature
Official title: {by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections}
H02K21/028 (By modifying the magnetic circuit within the field or the armature) appears on 187 US grants and 210 published applications in this corpus.
Search patents in H02K- Granted patents
- 187
- Published applications
- 210
- Assignees
- 100
- Inventors
- 351
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 9 |
| 2003 | 4 | 3 |
| 2004 | 5 | 4 |
| 2005 | 1 | 0 |
| 2006 | 2 | 6 |
| 2007 | 1 | 5 |
| 2008 | 3 | 9 |
| 2009 | 8 | 7 |
| 2010 | 5 | 6 |
| 2011 | 9 | 10 |
| 2012 | 7 | 15 |
| 2013 | 6 | 8 |
| 2014 | 5 | 9 |
| 2015 | 4 | 6 |
| 2016 | 5 | 1 |
| 2017 | 8 | 15 |
| 2018 | 4 | 9 |
| 2019 | 15 | 15 |
| 2020 | 12 | 16 |
| 2021 | 13 | 14 |
| 2022 | 12 | 10 |
| 2023 | 7 | 6 |
| 2024 | 10 | 13 |
| 2025 | 9 | 7 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotor structure of rotary electric machine12 May 2026US 12,627,206 B2Mazda Motor Corporation
- Transverse flux asynchronous electric machine31 Mar 2026US 12,592,622 B2The Boeing Company
- Rotor structure of rotary electric machine31 Mar 2026US 12,592,623 B2Mazda Motor Corporation
- Electric machine, method for operating said machine, and motor vehicle24 Mar 2026US 12,587,076 B2Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Rotor, rotary electric machine, and vehicle24 Mar 2026US 12,587,078 B2Mazda Motor Corporation
- Rotor, electric machine and kit of parts20 Aug 2026US 2026/0246325 A1Schaeffler Technologies AG & Co. KG
- Rotor and electric machine6 Aug 2026US 2026/0229974 A1Schaeffler Technologies AG & Co. KG
- 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
- Transverse flux asynchronous electric machine30 Jul 2026US 2026/0221855 A1The Boeing Company
- Electric machine16 Apr 2026US 2026/0106527 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents
- Axial gap dual permanent magnet generator84US 5,245,238 ASundstrand Corporation · 1993
- Method and apparatus for output regulation of multiple disk permanent magnet machines74US 4,371,801 AGeneral Electric Company · 1983
- Brushless motor having permanent magnets57US 5,821,710 AHitachi Metals, Ltd. · 1998
- Alternating current generator and method of angularly adjusting the relative positions of rotors thereof51US 4,879,484 ASundstrand Corporation · 1989
- Multi-rotor synchronous machine permitting relative movement between rotors51US 6,998,757 B2Denso Corporation · 2006