Sensorless induction motor system and control method thereof
US-2023402945-A1 · Dec 14, 2023 · US
Stator flux based control
Stator flux based control · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02P21/28 |
| Official title | Stator flux based control |
| Display label | Stator flux based control |
| Total patents | 73 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 7 |
| 2017 | 6 |
| 2018 | 7 |
| 2019 | 4 |
| 2020 | 8 |
| 2021 | 10 |
| 2022 | 8 |
| 2023 | 6 |
| 2024 | 4 |
| 2025 | 8 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Stator Flux Assistance and Overexcitation for Externally Excited Synchronous Machines
US-2023387840-A1 · Nov 30, 2023 · US
Inverter switching frequency control systems and methods
US-11689133-B1 · Jun 27, 2023 · US
Inverter switching frequency control systems and methods
US-2023198439-A1 · Jun 22, 2023 · US
Rotor position sensing system for permanent magnet synchronous motors and related methods
US-11652431-B2 · May 16, 2023 · US
Motor control method
US-11606054-B2 · Mar 14, 2023 · US
Motor control method
US-2022376640-A1 · Nov 24, 2022 · US
Estimation of the amplitude of a periodic component in a measured signal through a delta-sigma modulator
US-11349425-B2 · May 31, 2022 · US
N-phase N+1 bridge arm inverter and modulation method thereof
US-11342879-B2 · May 24, 2022 · US
Rotor position sensing system for permanent magnet synchronous motors and related methods
US-2022094286-A1 · Mar 24, 2022 · US
Driving device, driving system, and method of driving electric motor
US-11271513-B2 · Mar 8, 2022 · US
Control device and control method for induction motor
US-11271506-B2 · Mar 8, 2022 · US
Motor control device, image forming apparatus, and method for estimating initial position of magnetic pole of rotor
US-11233471-B2 · Jan 25, 2022 · US
Rotor position sensing system for permanent magnet synchronous motors and related methods
US-11228265-B2 · Jan 18, 2022 · US
Variable frequency independent speed motor control based on flux estimate
US-11146200-B2 · Oct 12, 2021 · US
Control device and control method for induction motor
US-2021297027-A1 · Sep 23, 2021 · US
Variable frequency independent speed motor control based on flux estimate
US-2021288603-A1 · Sep 16, 2021 · US
Driving device, driving system, and method of driving electric motor
US-2021281205-A1 · Sep 9, 2021 · US
Electric motor in propulsion system with auxiliary power generation
US-11095240-B2 · Aug 17, 2021 · US
Virtual voltage injection-based speed sensor-less driving control method for induction motor
US-11081992-B2 · Aug 3, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02P21/28?
- CPC H02P21/28 is the Cooperative Patent Classification code for “Stator flux based control.”
- How many patents are filed under CPC H02P21/28 (Stator flux based control)?
- Our database includes 73 publications tagged with this CPC code.
- Is patent activity under CPC H02P21/28 growing?
- Publication counts under this code: 4 in 2024 vs 8 in 2025 (latest complete years).