H02H 7/0844
Fail safe control
Official title: {Fail safe control, e.g. by comparing control signal and controlled current, isolating motor on commutation error}
H02H7/0844 (Fail safe control) appears on 165 US grants and 114 published applications in this corpus.
Search patents in H02H- Granted patents
- 165
- Published applications
- 114
- Assignees
- 139
- Inventors
- 375
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 0 |
| 2002 | 4 | 6 |
| 2003 | 3 | 5 |
| 2004 | 5 | 4 |
| 2005 | 3 | 1 |
| 2006 | 1 | 2 |
| 2007 | 4 | 7 |
| 2008 | 6 | 4 |
| 2009 | 6 | 6 |
| 2010 | 3 | 2 |
| 2011 | 3 | 3 |
| 2012 | 5 | 2 |
| 2013 | 1 | 0 |
| 2014 | 1 | 3 |
| 2015 | 3 | 10 |
| 2016 | 6 | 10 |
| 2017 | 6 | 10 |
| 2018 | 10 | 7 |
| 2019 | 7 | 6 |
| 2020 | 10 | 7 |
| 2021 | 5 | 5 |
| 2022 | 4 | 2 |
| 2023 | 5 | 2 |
| 2024 | 4 | 3 |
| 2025 | 2 | 7 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Safety device, system and method for monitoring an electric motor17 Feb 2026US 12,556,125 B2Pizzato Elettrica S.R. L.
- Advanced shutdown during fault-current conditions for semiconductor devices27 Jan 2026US 12,533,956 B2Caterpillar Inc.
- Fault detection methods and devices for pulse width modulation converters19 Aug 2025US 12,394,977 B2STMicroelectronics International N. V.
- Motor driver circuit having reverse current detection mechanism20 May 2025US 12,308,634 B2Anpec Electronics Corporation
- Motor control system and vehicle1 Oct 2024US 12,107,411 B2BYD Company Limited
- Advanced shutdown during fault-current conditions for semiconductor devices11 Dec 2025US 2025/0376032 A1Caterpillar Inc.
- Device assembly with a controller for condition monitoring19 Jun 2025US 2025/0202322 A1Dematic Corp.
- Detection of pulse-width modulation duty cycle errors19 Jun 2025US 2025/0202403 A1Rivian IP Holdings, LLC
- Control device8 May 2025US 2025/0149877 A1SITEMA GmbH & Co. KG
- Safety status monitoring system and method for motor drive control system1 May 2025US 2025/0141211 A1ZF Friedrichshafen AG
Most cited
By later US patents
- Motor drive apparatus475US 6,094,021 AHonda Giken Kogyo Kabushiki Kaisha · 2000
- Direct current motor safety circuits for fluid delivery systems321US 6,259,587 B1MiniMed Inc. · 2001
- Systems and methods for reducing runaway resistance on an exercise device79US 10,207,148 B2ICON Health & Fitness, Inc. · 2019
- Motor control fail-safe circuit55US 4,833,379 ASherwood Medical Company · 1989
- PWM driver for an inductive load with detector of a not regulating PWM condition40US 5,757,214 A1998