Electric motor apparatus
US-11177745-B2 · Nov 16, 2021 · US
Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases
Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02P23/28 |
| Official title | Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases |
| Display label | Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases |
| Total patents | 115 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 3 |
| 2017 | 10 |
| 2018 | 14 |
| 2019 | 7 |
| 2020 | 8 |
| 2021 | 10 |
| 2022 | 12 |
| 2023 | 12 |
| 2024 | 11 |
| 2025 | 10 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Pulse-controlled inverter with a variable speed-dependent switching frequency
US-2021257952-A1 · Aug 19, 2021 · US
Multi-inverter electronic motor controller
US-10944349-B2 · Mar 9, 2021 · US
Motor Control Device and Electric Vehicle System Using the Same
US-2021044243-A1 · Feb 11, 2021 · US
System and method of charging a buffer capacitor
US-10862472-B1 · Dec 8, 2020 · US
Electric motor apparatus
US-2020366223-A1 · Nov 19, 2020 · US
Electric motor apparatus
US-2020343849-A1 · Oct 29, 2020 · US
Motor driving control device and motor driving control method
US-2020266732-A1 · Aug 20, 2020 · US
Adapting the deceleration of a motor as a function of an average rectified voltage
US-2020204102-A1 · Jun 25, 2020 · US
Motor driving circuit and motor driving method thereof
US-10637389-B2 · Apr 28, 2020 · US
Control device of AC rotating electrical machine
US-10608569-B2 · Mar 31, 2020 · US
Motor driving circuit and motor driving method thereof
US-2020021230-A1 · Jan 16, 2020 · US
Motor driving circuit and control method thereof
US-2019356262-A1 · Nov 21, 2019 · US
Method for controlling medium-voltage inverter and system comprising the same
US-10425016-B2 · Sep 24, 2019 · US
Motor drive device
US-2019288612-A1 · Sep 19, 2019 · US
Motor driving control device and motor driving control method
US-10381964-B2 · Aug 13, 2019 · US
Electric machine comprising an alternating current electric motor and an inverter
US-10320321-B2 · Jun 11, 2019 · US
A method and controller for controlling an electric motor
US-2019165704-A1 · May 30, 2019 · US
System and Method of Synchronizing a Switching Signal
US-2019013748-A1 · Jan 10, 2019 · US
Adaptive pulse width modulation in motor control systems
US-10153714-B2 · Dec 11, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02P23/28?
- CPC H02P23/28 is the Cooperative Patent Classification code for “Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases.”
- How many patents are filed under CPC H02P23/28 (Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases)?
- Our database includes 115 publications tagged with this CPC code.
- Is patent activity under CPC H02P23/28 growing?
- Publication counts under this code: 11 in 2024 vs 10 in 2025 (latest complete years).