Stall detection in field-oriented sensorless motor control
US-2025357873-A1 · Nov 20, 2025 · US
specially adapted for optimising the efficiency at low load
specially adapted for optimising the efficiency at low load · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02P21/02 |
| Official title | specially adapted for optimising the efficiency at low load |
| Display label | specially adapted for optimising the efficiency at low load |
| Total patents | 53 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 2 |
| 2017 | 8 |
| 2018 | 2 |
| 2019 | 3 |
| 2020 | 9 |
| 2021 | 7 |
| 2022 | 5 |
| 2023 | 6 |
| 2024 | 3 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Power Converter
US-2025062708-A1 · Feb 20, 2025 · US
Methods of reducing vibrations for electric motors
US-12199532-B2 · Jan 14, 2025 · US
Device and method for controlling rotary electric machine
US-11863107-B2 · Jan 2, 2024 · US
Boosted converter for pulsed electric machine control
US-11863096-B2 · Jan 2, 2024 · US
Air conditioner and driving device
US-11863099-B2 · Jan 2, 2024 · US
Method, control device for controlling asynchronous induction motor and motor system
US-2023361702-A1 · Nov 9, 2023 · US
Pulsed electric machine control
US-2023253911-A1 · Aug 10, 2023 · US
Methods of Reducing Vibrations for Electric Motors
US-2023208330-A1 · Jun 29, 2023 · US
Methods of optimizing waveforms for electric motors
US-11637513-B2 · Apr 25, 2023 · US
Methods of reducing vibrations for electric motors
US-11557996-B1 · Jan 17, 2023 · US
Methods of reducing vibrations for electric motors
US-2023011334-A1 · Jan 12, 2023 · US
Driving device, driving system, and method of driving electric motor
US-11456689-B2 · Sep 27, 2022 · US
Methods of optimizing waveforms for electric motors
US-2022294368-A1 · Sep 15, 2022 · US
Motor driving device and air conditioner
US-11368118-B2 · Jun 21, 2022 · US
Controller for rotary electric machine apparatus
US-11296630-B2 · Apr 5, 2022 · US
Energy-efficient asynchronous machine
US-11283383-B2 · Mar 22, 2022 · US
Pulse modulated control with field weakening for improved motor efficiency
US-11167648-B1 · Nov 9, 2021 · US
Pulse modulated control with field weakening for improved motor efficiency
US-2021323415-A1 · Oct 21, 2021 · US
Control device and control method for AC motor and AC motor drive system
US-11139771-B2 · Oct 5, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02P21/02?
- CPC H02P21/02 is the Cooperative Patent Classification code for “specially adapted for optimising the efficiency at low load.”
- How many patents are filed under CPC H02P21/02 (specially adapted for optimising the efficiency at low load)?
- Our database includes 53 publications tagged with this CPC code.
- Is patent activity under CPC H02P21/02 growing?
- Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).