Pulse modulated control with field weakening for improved motor efficiency
US-2021323415-A1 · Oct 21, 2021 · US
using field weakening
using field weakening · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02P23/009 |
| Official title | {using field weakening} |
| Display label | using field weakening |
| Total patents | 89 |
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 | 5 |
| 2017 | 11 |
| 2018 | 14 |
| 2019 | 11 |
| 2020 | 8 |
| 2021 | 11 |
| 2022 | 7 |
| 2023 | 8 |
| 2024 | 5 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Motor control device
US-11139762-B2 · Oct 5, 2021 · US
Boosted electric propulsion system for electric truck and high performance vehicles
US-2021237587-A1 · Aug 5, 2021 · US
System and method for integrated battery charging and propulsion in plug-in electric vehicles
US-2021170890-A1 · Jun 10, 2021 · US
Method for adjusting high efficiency region of permanent magnet motor
US-2021167652-A1 · Jun 3, 2021 · US
Motor control apparatus
US-2021067079-A1 · Mar 4, 2021 · US
Motor and method of controlling motor, washing machine having motor
US-10927491-B2 · Feb 23, 2021 · US
Motor device
US-2020406761-A1 · Dec 31, 2020 · US
Method and device for operating an electric machine for outputting a predefined torque and a predefined rotational speed
US-2020313600-A1 · Oct 1, 2020 · US
Adjustable Frequency Drive Systems and Methods of Employing Power Compensation
US-2020191878-A1 · Jun 18, 2020 · US
Driving device, air conditioner, and driving method
US-2020186073-A1 · Jun 11, 2020 · US
Power tool
US-10658957-B2 · May 19, 2020 · US
Driving device, compressor, air conditioner, and driving method
US-2020144951-A1 · May 7, 2020 · US
Motor-control device
US-10601359-B2 · Mar 24, 2020 · US
Hybrid surface magnet machine
US-10581307-B1 · Mar 3, 2020 · US
Pump assembly and controlling method
US-10367439-B2 · Jul 30, 2019 · US
Motor control device
US-2019199250-A1 · Jun 27, 2019 · US
Motor
US-2019199160-A1 · Jun 27, 2019 · US
Hybrid surface magnet machine
US-10305408-B2 · May 28, 2019 · US
Power Tool
US-2019131899-A1 · May 2, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02P23/009?
- CPC H02P23/009 is the Cooperative Patent Classification code for “using field weakening.”
- How many patents are filed under CPC H02P23/009 (using field weakening)?
- Our database includes 89 publications tagged with this CPC code.
- Is patent activity under CPC H02P23/009 growing?
- Publication counts under this code: 5 in 2024 vs 4 in 2025 (latest complete years).