Monitoring device for a reluctance machine and method for monitoring
US-11201575-B2 · Dec 14, 2021 · US
specially adapted for very low speeds
specially adapted for very low speeds · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02P21/04 |
| Official title | specially adapted for very low speeds |
| Display label | specially adapted for very low speeds |
| Total patents | 86 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 5 |
| 2017 | 10 |
| 2018 | 10 |
| 2019 | 12 |
| 2020 | 11 |
| 2021 | 7 |
| 2022 | 12 |
| 2023 | 5 |
| 2024 | 1 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Starting method and apparatus for permanent magnet synchronous motor, power system, and unmanned aerial vehicle
US-11005396-B2 · May 11, 2021 · US
Motor drive system and method capable of suppressing heat generation during low speed operation
US-2020358389-A1 · Nov 12, 2020 · US
Control device
US-10749456-B2 · Aug 18, 2020 · US
Motor controller and electric power steering apparatus
US-2020255067-A1 · Aug 13, 2020 · US
Monitoring device for a reluctance machine and method for monitoring
US-2020259441-A1 · Aug 13, 2020 · US
Apparatus and method for detecting bldc motor overload
US-2020169213-A1 · May 28, 2020 · US
Electric motor system
US-10644638-B2 · May 5, 2020 · US
Control device of synchronous electric motor, integrated motor system, pump system, and positioning system
US-10644627-B2 · May 5, 2020 · US
Self-commissioning of a bearingless-motor drive
US-2020076255-A1 · Mar 5, 2020 · US
Torque current limiting vector control system and method for window regulator brushless motor
US-2020031207-A1 · Jan 30, 2020 · US
Sensorless commutation method
US-10541632-B2 · Jan 21, 2020 · US
Starting method and apparatus for permanent magnet synchronous motor, power system, and unmanned aerial vehicle
US-2020007055-A1 · Jan 2, 2020 · US
Sheet conveying apparatus, document reading apparatus and image forming apparatus
US-2019386596-A1 · Dec 19, 2019 · US
Variable magnetization machine controller
US-10483892-B2 · Nov 19, 2019 · US
Starting method and apparatus for permanent magnet synchronous motor, power system, and unmanned aerial vehicle
US-10447185-B2 · Oct 15, 2019 · US
Inverter control apparatus
US-10411630-B2 · Sep 10, 2019 · US
Control device
US-2019260318-A1 · Aug 22, 2019 · US
Method and apparatus for operating a starter for an internal combustion engine
US-10330070-B2 · Jun 25, 2019 · US
Closed Loop Torque Compensation for Compressor Applications
US-2019186480-A1 · Jun 20, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02P21/04?
- CPC H02P21/04 is the Cooperative Patent Classification code for “specially adapted for very low speeds.”
- How many patents are filed under CPC H02P21/04 (specially adapted for very low speeds)?
- Our database includes 86 publications tagged with this CPC code.
- Is patent activity under CPC H02P21/04 growing?
- Publication counts under this code: 1 in 2024 vs 3 in 2025 (latest complete years).