Power conditioning for high-speed machine generator
US-2025210982-A1 · Jun 26, 2025 · US
by variation of reluctance of magnetic circuit of generator
by variation of reluctance of magnetic circuit 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 | H02P9/40 |
| Official title | by variation of reluctance of magnetic circuit of generator |
| Display label | by variation of reluctance of magnetic circuit of generator |
| Total patents | 30 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2017 | 8 |
| 2018 | 2 |
| 2019 | 10 |
| 2020 | 3 |
| 2021 | 1 |
| 2022 | 1 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electrical generator and method of operating the same
US-11984259-B2 · May 14, 2024 · US
An electrical generator and method of operating the same
US-2024038428-A1 · Feb 1, 2024 · US
Permanent magnet energized motor with rotatable bar magnets
US-11223251-B2 · Jan 11, 2022 · US
Rotary electrical machine
US-11146158-B2 · Oct 12, 2021 · US
Rotary electrical machine
US-2020161950-A1 · May 21, 2020 · US
Permanent magnet energized motor with rotatable bar magnets
US-2020127510-A1 · Apr 23, 2020 · US
Alternator flux shaping
US-10581358-B2 · Mar 3, 2020 · US
Generator and method for controlling a generator
US-10516357-B2 · Dec 24, 2019 · US
Current supply system, electric power supply system, and control device
US-10493833-B2 · Dec 3, 2019 · US
Switched reluctance machine and power converter
US-10491150-B2 · Nov 26, 2019 · US
Transmission, control device, and vehicle
US-10449846-B2 · Oct 22, 2019 · US
Vehicle and engine generator unit for driving vehicle
US-10434859-B2 · Oct 8, 2019 · US
Electric power supply system, control device, vehicle, and engine generator unit for driving vehicle
US-10434858-B2 · Oct 8, 2019 · US
Alternator Flux Shaping
US-2019305704-A1 · Oct 3, 2019 · US
Vehicle having a generator with inductance-adjustable windings
US-10358022-B2 · Jul 23, 2019 · US
Switched reluctance machine and power converter
US-2019149075-A1 · May 16, 2019 · US
Method of efficiently operating an engine and a generator for increased load
US-10224847-B2 · Mar 5, 2019 · US
Drive system and vehicle
US-10081238-B2 · Sep 25, 2018 · US
Method of operating an engine and a generator
US-2018041152-A1 · Feb 8, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02P9/40?
- CPC H02P9/40 is the Cooperative Patent Classification code for “by variation of reluctance of magnetic circuit of generator.”
- How many patents are filed under CPC H02P9/40 (by variation of reluctance of magnetic circuit of generator)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC H02P9/40 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).