H02P 9/12
For demagnetising
Official title: for demagnetising; for reducing effects of remanence; for preventing pole reversal
H02P9/12 (For demagnetising) appears on 22 US grants and 17 published applications in this corpus.
Search patents in H02P- Granted patents
- 22
- Published applications
- 17
- Assignees
- 20
- Inventors
- 54
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 3 |
| 2013 | 1 | 1 |
| 2014 | 2 | 0 |
| 2015 | 1 | 1 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 0 | 3 |
| 2020 | 1 | 3 |
| 2021 | 5 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 2 |
| 2024 | 0 | 1 |
| 2025 | 3 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method for control of an externally excited electric machine of a motor vehicle, and the motor vehicle1 Jul 2025US 12,348,165 B2Audi AG
- Control apparatus for rotating electric machine24 Jun 2025US 12,341,452 B2Denso Corporation
- De-exciting system for inductive circuits13 May 2025US 12,301,158 B2ABB Schweiz AG
- Regenerative current limiting of synchronous motor drives31 May 2022US 11,349,430 B2Steering Solutions IP Holding Corporation
- Generator loss-of-field protection7 Dec 2021US 11,196,369 B2Schweitzer Engineering Laboratories, Inc.
- Method for control of an externally excited electric machine of a motor vehicle, and the motor vehicle18 Jan 2024US 2024/0022195 A1Audi AG
- De-Exciting System for Inductive Circuits16 Nov 2023US 2023/0370003 A1ABB Schweiz AG
- Control apparatus for rotating electric machine9 Nov 2023US 2023/0361705 A1Denso Corporation
- Regenerative current limiting of synchronous motor drives15 Apr 2021US 2021/0111661 A1Steering Solutions IP Holding Corporation
- Generator loss-of-field protection5 Mar 2020US 2020/0076338 A1Schweitzer Engineering Laboratories, Inc.
Most cited
By later US patents
- Apparatus for supplying high power electric loads operated in a pulse-like manner, especially for X-ray equipment31US 4,355,276 AMedicor Muvek · 1982
- Dynamoelectric machines brushless supplemental excitation system30US 4,336,486 AWestinghouse Electric Corp. · 1982
- Fast de-excitation brushless exciter22US 4,152,636 AWestinghouse Electric Corp. · 1979
- Electric synchronous machine which is excited via rotating rectifiers22US 4,591,775 ASiemens Aktiengesellschaft · 1986
- Control device and method for motor/generator18US 6,335,606 B12002