H02P 25/24
Variable impedance in stator or rotor circuit
H02P25/24 (Variable impedance in stator or rotor circuit) appears on 66 US grants and 37 published applications in this corpus.
Search patents in H02P- Granted patents
- 66
- Published applications
- 37
- Assignees
- 47
- Inventors
- 137
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 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 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 3 |
| 2004 | 3 | 1 |
| 2005 | 1 | 3 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 3 |
| 2011 | 0 | 0 |
| 2012 | 1 | 3 |
| 2013 | 1 | 2 |
| 2014 | 1 | 0 |
| 2015 | 0 | 4 |
| 2016 | 3 | 0 |
| 2017 | 3 | 2 |
| 2018 | 2 | 1 |
| 2019 | 3 | 3 |
| 2020 | 2 | 4 |
| 2021 | 1 | 2 |
| 2022 | 3 | 2 |
| 2023 | 4 | 2 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method for adjusting an operational performance of an electric machine, data processing device, computer program, computer-readable storage medium, and electric drive system5 Aug 2025US 12,381,503 B2Volvo Car Corporation
- Motor with predictive adjustment, motor controller, and method for automatically adjusting said motor8 Aug 2023US 11,718,186 B2Orange
- Dynamo-electric machine18 Apr 2023US 11,632,021 B2Raytheon Company
- Rotary machine driving system and vehicle7 Mar 2023US 11,601,082 B2Hitachi, Ltd.
- Rotary machine controller, refrigerant compressor, refrigeration cycle system, and air conditioner28 Feb 2023US 11,594,993 B2Mitsubishi Electric Corporation
- Smart Coils for an Electric Motor8 May 2025US 2025/0150016 A1Kansas State University Research Foundation
- Method for adjusting an operational performance of an electric machine, data processing device, computer program, computer-readable storage medium, and electric drive system14 Dec 2023US 2023/0402950 A1Volvo Car Corporation
- Dynamo-electric machine4 May 2023US 2023/0140831 A2Raytheon Company
- Dynamo-electric machine6 Oct 2022US 2022/0320935 A1Raytheon Company
- Rotary machine driving system and vehicle6 Jan 2022US 2022/0006411 A1Hitachi, Ltd.
Most cited
By later US patents
- Halbach array generator/motor having an automatically regulated output voltage and mechanical power output36US 6,858,962 B2The Regents of the University of California · 2005
- Motor control system21US 4,344,025 AHitachi, Ltd. · 1982
- Speed control system and method for electric motor21US 4,408,150 AEmerson Electric Co. · 1983
- Multiple position power switch20US 4,352,993 ASilent Running Corporation · 1982
- Apparatus and method for controlling drive of three-phase multiplex winding motor18US 6,107,774 AMeidensha Corporation · 2000