Secondary magnetic excitation generator-motor device
US-11942873-B2 · Mar 26, 2024 · US
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Self-excitation by current derived from rectification of both output voltage and output current of generator
Self-excitation by current derived from rectification of both output voltage and output current of generator · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02P9/38 |
| Official title | Self-excitation by current derived from rectification of both output voltage and output current of generator |
| Display label | Self-excitation by current derived from rectification of both output voltage and output current of generator |
| Total patents | 23 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 6 |
| 2018 | 3 |
| 2019 | 4 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 1 |
| 2024 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Secondary magnetic excitation generator-motor device
US-2022231615-A1 · Jul 21, 2022 · US
Electromagnetic induction power generator
US-2021384854-A1 · Dec 9, 2021 · US
Electrical isolation of an alternator
US-10693340-B2 · Jun 23, 2020 · US
Smart load bank and excitation control
US-10476267-B2 · Nov 12, 2019 · US
Installation and method for generating a three-phase ac voltage to be fed into a power supply system
US-2019190420-A1 · Jun 20, 2019 · US
Field winding synchronous machine drive system
US-10250175-B2 · Apr 2, 2019 · US
System and method for an inverter for self-excitation of an induction machine
US-10224849-B2 · Mar 5, 2019 · US
Power generator system, power generator control device, and power-generation balance control method for power generator system
US-10141876-B2 · Nov 27, 2018 · US
Electrical isolation of an alternator
US-2018109160-A1 · Apr 19, 2018 · US
Auxiliary winding for a generator
US-9882518-B2 · Jan 30, 2018 · US
Reconfigurable multi-permanent magnet generator based power generating system
US-2017359011-A1 · Dec 14, 2017 · US
System and method for an inverter for self-excitation of an induction machine
US-2017353135-A1 · Dec 7, 2017 · US
Power generator system, power generator control device, and power-generation balance control method for power generator system
US-2017317629-A1 · Nov 2, 2017 · US
Self-Excitation Traction Alternator for Locomotive
US-2017194888-A1 · Jul 6, 2017 · US
Field winding synchronous machine drive system
US-2017179864-A1 · Jun 22, 2017 · US
Smart Load Bank and Excitation Control
US-2017133847-A1 · May 11, 2017 · US
Wound-field generator including electrically isolated engine alternator
US-9467083-B1 · Oct 11, 2016 · US
Generator excitation apparatus and power conversion system
US-9374030-B2 · Jun 21, 2016 · US
Resonant commutation system for exciting a three-phase alternator
US-9369075-B2 · Jun 14, 2016 · US