H02P 1/30
By progressive increase of frequency of supply to primary circuit of motor
Official title: by progressive increase of frequency of supply to primary circuit of motor
H02P1/30 (By progressive increase of frequency of supply to primary circuit of motor) appears on 75 US grants and 62 published applications in this corpus.
Search patents in H02P- Granted patents
- 75
- Published applications
- 62
- Assignees
- 62
- Inventors
- 169
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 1 |
| 2008 | 2 | 1 |
| 2009 | 1 | 5 |
| 2010 | 1 | 3 |
| 2011 | 1 | 6 |
| 2012 | 5 | 1 |
| 2013 | 2 | 3 |
| 2014 | 3 | 2 |
| 2015 | 2 | 3 |
| 2016 | 4 | 6 |
| 2017 | 4 | 4 |
| 2018 | 2 | 1 |
| 2019 | 1 | 6 |
| 2020 | 5 | 5 |
| 2021 | 2 | 2 |
| 2022 | 6 | 1 |
| 2023 | 1 | 2 |
| 2024 | 3 | 6 |
| 2025 | 2 | 0 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus comprising an inverter24 Mar 2026US 12,583,335 B2Thermo King Corporation
- Control of motor soft starter using power electronic switching devices6 Jan 2026US 12,519,404 B2Eaton Intelligent Power Limited
- Wireline power supply during electric powered fracturing operations7 Oct 2025US 12,438,480 B2U.S. Well Services, LLC
- Drive equipment and control method3 Jun 2025US 12,323,063 B2TMEIC 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
- Apparatus comprising an inverter9 Jul 2026US 2026/0192687 A1Thermo King Corporation
- Method for controlling induction motor, device, equipment, and storage medium5 Mar 2026US 2026/0066816 A1Fortior Technology (Shanghai) Co., Ltd.
- Apparatus comprising an inverter29 Aug 2024US 2024/0286493 A1Thermo King Corporation
- Wireline power supply during electric powered fracturing operations29 Aug 2024US 2024/0291405 A1U.S. Well Services, LLC
- 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
Most cited
By later US patents
- Microturbine based power generation system and method54US 6,281,595 B1General Electric Company · 2001
- Method of restarting induction motor and apparatus for carrying out the same53US 4,409,533 AMitsubishi Denki Kabushiki Kaisha · 1983
- Variable frequency motor starting system and method48US 6,150,776 AMetropolitan Industries, Inc. · 2000
- Method and apparatus for controlling AC motor39US 4,451,112 AHitachi, Ltd. · 1984
- Prime mover for operating an electric motor37US 6,175,210 B1AlliedSignal Power Systems Inc. · 2001