H02P 23/28
Controlling the motor by varying the switching frequency of switches connected to
Official title: Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases
H02P23/28 (Controlling the motor by varying the switching frequency of switches connected to) appears on 65 US grants and 60 published applications in this corpus.
Search patents in H02P- Granted patents
- 65
- Published applications
- 60
- Assignees
- 49
- Inventors
- 139
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 2 |
| 2013 | 1 | 1 |
| 2014 | 3 | 7 |
| 2015 | 6 | 8 |
| 2016 | 1 | 2 |
| 2017 | 8 | 2 |
| 2018 | 3 | 3 |
| 2019 | 2 | 0 |
| 2020 | 1 | 2 |
| 2021 | 2 | 3 |
| 2022 | 2 | 7 |
| 2023 | 6 | 3 |
| 2024 | 5 | 6 |
| 2025 | 3 | 3 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- AC-to-DC converter and variable-frequency drive22 Sep 2026US 12,744,483 B2Inner Energy Technology Co., Ltd.
- Motor control system, motor control method, and non-transitory storage medium8 Sep 2026US 12,732,124 B2Toyota Jidosha Kabushiki Kaisha
- Motor control device, motor control method, hybrid system, boost converter system, and electric power steering system26 May 2026US 12,640,664 B2Hitachi Astemo, Ltd.
- Apparatus and method of controlling a motor3 Mar 2026US 12,567,822 B2Hyundai Autoever Corp.
- Control device and communication method in control device30 Dec 2025US 12,512,776 B2Mitsuba Corporation
- Control device, winding switching system, control method, and control program20 Aug 2026US 2026/0246409 A1Autonetworks Technologies, Ltd.
- Motor drive system11 Jun 2026US 2026/0158930 A1Subaru Corporation
- Technique for controlling brushless motor of electric work machine28 May 2026US 2026/0149401 A1Makita Corporation
- Motor Control Apparatus and Motor Control Method26 Mar 2026US 2026/0088746 A1Hitachi Astemo, Ltd.
- Energy storage based dc volts boost for transient high-speed/high-torque operation of variable frequency drive controlled motors29 Jan 2026US 2026/0031752 A1
Most cited
By later US patents
- Monitoring speed control and precision incrementing of motor for powered surgical instruments1,471US 9,895,148 B2Ethicon Endo-Surgery, Inc. · 2018
- Control system for synchronous brushless motors65US 4,447,771 AKollmorgen Technologies Corporation · 1984
- Inverter control apparatus48US 5,614,803 ANippondenso Co., Ltd. · 1997
- Variable-flux motor drive system42US 8,552,678 B2Kabushiki Kaisha Toshiba · 2013
- Variable speed electric machine having controlled magnetic flux density31US 4,338,557 A1982