H02P 27/16
Using ac to ac converters without intermediate conversion to dc
Official title: using AC to AC converters without intermediate conversion to DC (H02P27/05 takes precedence)
H02P27/16 (Using ac to ac converters without intermediate conversion to dc) appears on 162 US grants and 153 published applications in this corpus.
Search patents in H02P- Granted patents
- 162
- Published applications
- 153
- Assignees
- 114
- Inventors
- 336
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 3 |
| 2002 | 3 | 2 |
| 2003 | 4 | 3 |
| 2004 | 3 | 3 |
| 2005 | 1 | 1 |
| 2006 | 5 | 6 |
| 2007 | 7 | 13 |
| 2008 | 6 | 7 |
| 2009 | 6 | 8 |
| 2010 | 5 | 5 |
| 2011 | 8 | 5 |
| 2012 | 3 | 5 |
| 2013 | 7 | 5 |
| 2014 | 7 | 8 |
| 2015 | 6 | 10 |
| 2016 | 7 | 11 |
| 2017 | 6 | 7 |
| 2018 | 9 | 8 |
| 2019 | 6 | 8 |
| 2020 | 10 | 8 |
| 2021 | 6 | 4 |
| 2022 | 5 | 10 |
| 2023 | 5 | 6 |
| 2024 | 4 | 3 |
| 2025 | 3 | 2 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Motor control device29 Sep 2026US 12,749,996 B2Lutron Technology Company LLC
- Systems and methods for seamlessly transferring a load between two AC sources of ac electrical power4 Aug 2026US 12,700,733 B2
- Control of motor soft starter using power electronic switching devices6 Jan 2026US 12,519,404 B2Eaton Intelligent Power Limited
- Method of setting up an electrical motor speed control in a fluidic system23 Dec 2025US 12,504,015 B2Schneider Toshiba Inverter Europe SAS
- Synchronous inverter22 Jul 2025US 12,368,399 B2Discovery Energy, LLC
- Independent transistor gate sequencing for precision zero-cross shutoff11 Jun 2026US 2026/0163502 A1Rockwell Automation Technologies, Inc.
- Systems and methods for seamlessly transfering a load between two ac sources of ac electrical power5 Mar 2026US 2026/0066655 A1
- Variable Frequency Drive (VFD) Controllers With Engine Failover And Systems Including The Same18 Dec 2025US 2025/0385511 A1Cattron North America, Inc.
- Ac-to-ac converter19 Jun 2025US 2025/0202377 A1Dyson Technology Limited
- Motor Control Device14 Nov 2024US 2024/0380348 A1Lutron Technology Company LLC
Most cited
By later US patents
- Method and apparatus for quiet variable motor speed control1,483US 7,330,004 B2Lutron Electronics Co., Inc. · 2008
- Modular static power converter connected in a multi-level, multi-phase, multi-circuit configuration127US 5,933,339 AElectric Boat Corporation · 1999
- Direct AC converter for converting a balanced AC polyphase input to an output voltage104US 4,468,725 ATexas Instruments Incorporated · 1984
- Modular transformer arrangement for use with multi-level power converter101US 6,340,851 B12002
- Modular AC-AC variable voltage and variable frequency power conveter system and control81US 5,909,367 AReliance Electric Industrial Company · 1999