H02P 1/28
By progressive increase of voltage applied to primary circuit of motor
Official title: by progressive increase of voltage applied to primary circuit of motor
H02P1/28 (By progressive increase of voltage applied to primary circuit of motor) appears on 95 US grants and 59 published applications in this corpus.
Search patents in H02P- Granted patents
- 95
- Published applications
- 59
- Assignees
- 63
- Inventors
- 201
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 2 |
| 2004 | 2 | 3 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 2 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 3 |
| 2010 | 0 | 0 |
| 2011 | 2 | 2 |
| 2012 | 2 | 5 |
| 2013 | 8 | 2 |
| 2014 | 2 | 3 |
| 2015 | 1 | 5 |
| 2016 | 2 | 3 |
| 2017 | 2 | 2 |
| 2018 | 2 | 1 |
| 2019 | 3 | 6 |
| 2020 | 3 | 4 |
| 2021 | 6 | 2 |
| 2022 | 1 | 3 |
| 2023 | 3 | 3 |
| 2024 | 5 | 4 |
| 2025 | 3 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Control of motor soft starter using power electronic switching devices6 Jan 2026US 12,519,404 B2Eaton Intelligent Power Limited
- Plug and play solid state controller for high efficiency motors25 Nov 2025US 12,483,171 B2ABB Schweiz AG
- Superconducting rotating machine and method of controlling superconducting rotating machine1 Apr 2025US 12,267,031 B2Kyoto University
- Induction motors including speed sensing circuits for motor control4 Mar 2025US 12,244,188 B2Copeland Corporation
- Solar power system for induction motor soft-starting and power compensation, and related methods22 Oct 2024US 12,126,177 B2Board of Trustees of Michigan State University
- Method, apparatus, storage medium and program product for reduced-voltage starting of motor16 Jul 2026US 2026/0205034 A1Schneider Electric Industries SAS
- Independent transistor gate sequencing for precision zero-cross shutoff11 Jun 2026US 2026/0163502 A1Rockwell Automation Technologies, Inc.
- Plug and Play Solid State Controller for High Efficiency Motors19 Jun 2025US 2025/0202397 A1ABB Schweiz AG
- Solar power system for induction motor soft-starting and power compensation, and related methods8 Aug 2024US 2024/0266836 A1Board of Trustees of Michigan State University
- Control of motor soft starter using power electronic switching devices11 Jul 2024US 2024/0235441 A9Eaton Intelligent Power Limited
Most cited
By later US patents
- Chiller controls44US 4,084,406 AFedders Corporation · 1978
- Apparatus for controlling an electric motor42US 5,151,642 AAllen-Bradley Company, Inc. · 1992
- Starter circuit for motors, particularly for refrigerator compressors41US 6,329,784 B1Minu, L.L.C. · 2001
- Polyphase power control40US 4,070,605 AMcNeil Corporation · 1978
- Motor power factor controller with a reduced voltage starter38US 4,404,511 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1983