Controller for permanent magnet synchronous motor, control method, and image forming apparatus
US-10141877-B2 · Nov 27, 2018 · US
Rotor flux based control
Rotor 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 | H02P21/26 |
| Official title | Rotor flux based control |
| Display label | Rotor flux based control |
| Total patents | 216 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 18 |
| 2016 | 8 |
| 2017 | 16 |
| 2018 | 26 |
| 2019 | 29 |
| 2020 | 26 |
| 2021 | 28 |
| 2022 | 25 |
| 2023 | 12 |
| 2024 | 14 |
| 2025 | 13 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Drive apparatus for oil-pump motor and drive control method for oil-pump motor
US-2018337620-A1 · Nov 22, 2018 · US
Motor system with current sensorless control and method of controlling the same
US-2018287537-A1 · Oct 4, 2018 · US
A motor controller and a motor system
US-2018219497-A1 · Aug 2, 2018 · US
Control device of induction motor
US-2018212543-A1 · Jul 26, 2018 · US
Synchronous motor control device, compressor driving device, air conditioner, and method of controlling synchronous motor
US-2018208023-A1 · Jul 26, 2018 · US
Drive system and inverter
US-2018191285-A1 · Jul 5, 2018 · US
Motor control apparatus for vector-controlling sensorless motor
US-9998048-B2 · Jun 12, 2018 · US
Sheet conveying apparatus and image forming apparatus
US-2018152126-A1 · May 31, 2018 · US
Steering control apparatus
US-9975571-B2 · May 22, 2018 · US
Controller for permanent magnet synchronous motor, control method, and image forming apparatus
US-2018123492-A1 · May 3, 2018 · US
System and method for sensorless control of electric machines using magnetic alignment signatures
US-2018109219-A1 · Apr 19, 2018 · US
System and method for sensorless control of electric machines using magnetic alignment signatures
US-2018109218-A1 · Apr 19, 2018 · US
System and method for sensorless control of electric machines using magnetic alignment signatures
US-9948224-B1 · Apr 17, 2018 · US
Rotation angle estimation apparatus for rotating electric machine
US-9948220-B2 · Apr 17, 2018 · US
Rotation angle estimation apparatus for rotating electric machine
US-2018026559-A1 · Jan 25, 2018 · US
Controller for permanent magnet synchronous motor, image forming apparatus, and control method
US-2018019700-A1 · Jan 18, 2018 · US
Motor control apparatus, sheet conveying apparatus, document feeding apparatus, document reading apparatus, and image forming apparatus
US-2018013366-A1 · Jan 11, 2018 · US
Steering control apparatus
US-2017355395-A1 · Dec 14, 2017 · US
Motor control apparatus, sheet conveyance apparatus, and image forming apparatus
US-2017346974-A1 · Nov 30, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02P21/26?
- CPC H02P21/26 is the Cooperative Patent Classification code for “Rotor flux based control.”
- How many patents are filed under CPC H02P21/26 (Rotor flux based control)?
- Our database includes 216 publications tagged with this CPC code.
- Is patent activity under CPC H02P21/26 growing?
- Publication counts under this code: 14 in 2024 vs 13 in 2025 (latest complete years).