Motor driving device, air conditioning device including same, and control method for motor driving device
US-10523147-B2 · Dec 31, 2019 · US
Estimation of constants, e.g. the rotor time constant
Estimation of constants, e.g. the rotor time constant · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02P21/16 |
| Official title | Estimation of constants, e.g. the rotor time constant |
| Display label | Estimation of constants, e.g. the rotor time constant |
| Total patents | 253 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 15 |
| 2016 | 11 |
| 2017 | 5 |
| 2018 | 7 |
| 2019 | 29 |
| 2020 | 29 |
| 2021 | 32 |
| 2022 | 31 |
| 2023 | 26 |
| 2024 | 23 |
| 2025 | 42 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Temperature control strategy for electric starter system with polyphase brushless starter motor
US-10487791-B1 · Nov 26, 2019 · US
Temperature control strategy for electric starter system with polyphase brushless starter motor
US-2019338745-A1 · Nov 7, 2019 · US
Method for operating an electrical machine and electrical machine
US-10469017-B2 · Nov 5, 2019 · US
Motor drive unit
US-2019334465-A1 · Oct 31, 2019 · US
Methods and systems for determining when to apply an adaptative thermal compensation in an operating region of a motor
US-10461678-B2 · Oct 29, 2019 · US
Motor control apparatus, sheet conveyance apparatus, document feeding apparatus, document reading apparatus, and image forming apparatus
US-2019312538-A1 · Oct 10, 2019 · US
Current detection apparatus and control apparatus of rotary electric machine
US-10432124-B2 · Oct 1, 2019 · US
Motor driving apparatus and method of controlling the same
US-10425033-B2 · Sep 24, 2019 · US
Methods and systems for determining when to apply an adaptative thermal compensation in an operating region of a motor
US-2019288625-A1 · Sep 19, 2019 · US
Control device
US-2019260318-A1 · Aug 22, 2019 · US
Systems and methods for acquiring measurements of rotor temperature of electric machines
US-2019229672-A1 · Jul 25, 2019 · US
Method and apparatus for characterisation of a three phase induction motor
US-2019222156-A1 · Jul 18, 2019 · US
Motor control method, motor control system, and electric power steering system
US-2019214928-A1 · Jul 11, 2019 · US
Method for controlling a synchronous machine and control device for a synchronous machine
US-2019207546-A1 · Jul 4, 2019 · US
System and method for stability control in adjustable speed drive with DC link thin film capacitor
US-10333444-B2 · Jun 25, 2019 · US
Control device for rotary machine, and electric power steering apparatus
US-10315692-B2 · Jun 11, 2019 · US
Control device
US-10320317-B2 · Jun 11, 2019 · US
Inverter device
US-2019173406-A1 · Jun 6, 2019 · US
Machine loss modeling for improved field oriented control accuracy
US-10305407-B2 · May 28, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02P21/16?
- CPC H02P21/16 is the Cooperative Patent Classification code for “Estimation of constants, e.g. the rotor time constant.”
- How many patents are filed under CPC H02P21/16 (Estimation of constants, e.g. the rotor time constant)?
- Our database includes 253 publications tagged with this CPC code.
- Is patent activity under CPC H02P21/16 growing?
- Publication counts under this code: 23 in 2024 vs 42 in 2025 (latest complete years).