H02M 5/27
For conversion of frequency
Official title: for conversion of frequency
H02M5/27 (For conversion of frequency) appears on 248 US grants and 123 published applications in this corpus.
Search patents in H02M- Granted patents
- 248
- Published applications
- 123
- Assignees
- 124
- Inventors
- 371
- Latest grant
- 22 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 19 | 0 |
| 1988 | 2 | 0 |
| 1989 | 9 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 6 | 2 |
| 2002 | 4 | 2 |
| 2003 | 4 | 12 |
| 2004 | 11 | 7 |
| 2005 | 3 | 11 |
| 2006 | 5 | 5 |
| 2007 | 6 | 3 |
| 2008 | 6 | 10 |
| 2009 | 3 | 4 |
| 2010 | 5 | 3 |
| 2011 | 7 | 4 |
| 2012 | 4 | 3 |
| 2013 | 3 | 8 |
| 2014 | 5 | 3 |
| 2015 | 7 | 8 |
| 2016 | 6 | 3 |
| 2017 | 5 | 5 |
| 2018 | 7 | 6 |
| 2019 | 4 | 6 |
| 2020 | 5 | 3 |
| 2021 | 4 | 5 |
| 2022 | 4 | 4 |
| 2023 | 6 | 1 |
| 2024 | 0 | 2 |
| 2025 | 3 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Synchronous inverter22 Jul 2025US 12,368,399 B2Discovery Energy, LLC
- Method for operating a converter, converter and computer program product27 May 2025US 12,316,236 B2Hitachi Energy Ltd
- Multi-port subsea high-voltage power modulation and stored energy distribution system28 Jan 2025US 12,212,144 B2Raytheon Company
- Motor control device and motor control method26 Dec 2023US 11,855,560 B2Delta Electronics, Inc.
- Apparatus and methods for supplying DC power to control circuitry of a matrix converter19 Dec 2023US 11,848,619 B2ITT Manufacturing Enterprises, Inc.
- Resonant power conversion systems and methods2 Jul 2026US 2026/0189151 A1B. G. Negev Technologies and Applications Ltd.
- Integrated Transformer Power Supply System for Multiphase Plasma Generation Devices13 Mar 2025US 2025/0087446 A1Beijing Oriental Yanzhong Industrial Development Group Co., Ltd.
- Power supply system for a plurality of electrolyzers and associated facility and method16 Jan 2025US 2025/0023482 A1GE Energy Power Conversion Technology Limited
- Multi-port subsea high-voltage power modulation and stored energy distribution system24 Oct 2024US 2024/0356336 A1Raytheon Company
- Method for operating a converter, converter and computer program product16 May 2024US 2024/0162828 A1Hitachi Energy Ltd
Most cited
By later US patents
- Direct AC converter for converting a balanced AC polyphase input to an output voltage104US 4,468,725 ATexas Instruments Incorporated · 1984
- Power supply frequency converter103US 4,894,766 AHazeltine Corporation · 1990
- Modular AC-AC variable voltage and variable frequency power conveter system and control81US 5,909,367 AReliance Electric Industrial Company · 1999
- Multiphase power converter73US 6,014,323 ARobicon Corporation · 2000
- Three-phase matrix converter and method for operation thereof66US 5,949,672 AABB Patent GmbH · 1999