Technique for dissipating heat in electric work machine
US-12519376-B2 · Jan 6, 2026 · US
using supply voltage with constant frequency and variable amplitude
using supply voltage with constant frequency and variable amplitude · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02P27/02 |
| Official title | using supply voltage with constant frequency and variable amplitude |
| Display label | using supply voltage with constant frequency and variable amplitude |
| Total patents | 48 |
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 | 4 |
| 2016 | 8 |
| 2017 | 3 |
| 2018 | 4 |
| 2019 | 7 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 5 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Tool brownout management
US-12476569-B2 · Nov 18, 2025 · US
Motor controller
US-11932233-B2 · Mar 19, 2024 · US
Control device for electric vehicle
US-11881803-B2 · Jan 23, 2024 · US
Clothes treating apparatus and the control method for the same
US-11821131-B2 · Nov 21, 2023 · US
Electrical system testing processes
US-11782097-B2 · Oct 10, 2023 · US
Technique for dissipating heat in electric work machine
US-2023011554-A1 · Jan 12, 2023 · US
Control device for electric vehicle
US-2022231630-A1 · Jul 21, 2022 · US
Electrical System Testing Processes
US-2022214406-A1 · Jul 7, 2022 · US
Motor controller
US-2022212652-A1 · Jul 7, 2022 · US
Clothes treating apparatus and the control method for the same
US-2022195656-A1 · Jun 23, 2022 · US
Tool brownout management
US-2022190767-A1 · Jun 16, 2022 · US
Detection of the type of an electric motor for the configuration of a variable speed drive
US-11095236-B2 · Aug 17, 2021 · US
Electric machine controlling method and electric machine controlling device
US-11056994-B2 · Jul 6, 2021 · US
System and method for driving a motor to rotate at a high speed
US-10998839-B2 · May 4, 2021 · US
Motor control device and motor control method
US-10897220-B2 · Jan 19, 2021 · US
System and method for driving a motor to rotate at a high speed
US-2021013819-A1 · Jan 14, 2021 · US
Electric machine controlling method and electric machine controlling device
US-2020343844-A1 · Oct 29, 2020 · US
Detection of the type of an electric motor for the configuration of a variable speed drive
US-2020295679-A1 · Sep 17, 2020 · US
Controller of electrically powered vehicle
US-10723233-B2 · Jul 28, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02P27/02?
- CPC H02P27/02 is the Cooperative Patent Classification code for “using supply voltage with constant frequency and variable amplitude.”
- How many patents are filed under CPC H02P27/02 (using supply voltage with constant frequency and variable amplitude)?
- Our database includes 48 publications tagged with this CPC code.
- Is patent activity under CPC H02P27/02 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).