Vertical-axis-type wind turbine equipped high-temperature superconducting generator with batch impregnation cooling structure using cryogen
US-2024060471-A1 · Feb 22, 2024 · US
with rotating field windings
with rotating field windings · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02K55/04 |
| Official title | with rotating field windings |
| Display label | with rotating field windings |
| Total patents | 148 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 18 |
| 2016 | 10 |
| 2017 | 14 |
| 2018 | 10 |
| 2019 | 9 |
| 2020 | 13 |
| 2021 | 18 |
| 2022 | 17 |
| 2023 | 9 |
| 2024 | 15 |
| 2025 | 12 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Cryocooler
US-10520226-B2 · Dec 31, 2019 · US
Rotary machine
US-10476365-B2 · Nov 12, 2019 · US
High temperature superconducting synchronous machine with rotating armature
US-2019296629-A1 · Sep 26, 2019 · US
Helical Winding with More Uniform Field Utilization
US-2019238020-A1 · Aug 1, 2019 · US
Superconducting rotating machine
US-10367406-B2 · Jul 30, 2019 · US
Cooling assembly for electrical machines and methods of assembling the same
US-10224799-B2 · Mar 5, 2019 · US
Cooling medium supply/discharge device and superconducting rotary machine including cooling medium supply/discharge device
US-10199905-B2 · Feb 5, 2019 · US
Support structures for hts magnets
US-2018286551-A1 · Oct 4, 2018 · US
Wedges with q-axis damper circuits
US-2018278112-A1 · Sep 27, 2018 · US
Apparatus and method for in-situ charging of superconductors
US-10084366-B2 · Sep 25, 2018 · US
Vibrating motor
US-2018248458-A1 · Aug 30, 2018 · US
Rotary machine
US-2018248464-A1 · Aug 30, 2018 · US
Superconducting rotating machine and cooling method thereof
US-10041711-B2 · Aug 7, 2018 · US
Stator winding arrangement of superconducting rotating machine
US-9941759-B2 · Apr 10, 2018 · US
Cryocooler
US-2018094837-A1 · Apr 5, 2018 · US
Synchronous generator for wind turbine
US-2018062484-A1 · Mar 1, 2018 · US
Cooling Device For A High Pole-Count Rotor
US-2018041105-A1 · Feb 8, 2018 · US
Magnetic field generating device and superconducting rotary machine comprising magnetic field generating device
US-9799434-B2 · Oct 24, 2017 · US
Superconducting field pole
US-9768652-B2 · Sep 19, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02K55/04?
- CPC H02K55/04 is the Cooperative Patent Classification code for “with rotating field windings.”
- How many patents are filed under CPC H02K55/04 (with rotating field windings)?
- Our database includes 148 publications tagged with this CPC code.
- Is patent activity under CPC H02K55/04 growing?
- Publication counts under this code: 15 in 2024 vs 12 in 2025 (latest complete years).