System and method for ground fault detection of static starter circuitry
US-2023417842-A1 · Dec 28, 2023 · US
by progressive increase of frequency of supply to motor
by progressive increase of frequency of supply to motor · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H02P1/52 |
| Official title | by progressive increase of frequency of supply to motor |
| Display label | by progressive increase of frequency of supply to motor |
| Total patents | 70 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 14 |
| 2017 | 8 |
| 2018 | 4 |
| 2019 | 5 |
| 2020 | 5 |
| 2021 | 6 |
| 2022 | 5 |
| 2023 | 6 |
| 2024 | 2 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods of protecting motors driven by variable frequency drives and variable frequency drive systems employing the same
US-11811345-B1 · Nov 7, 2023 · US
Electrically driven distributed propulsion system
US-2023238799-A1 · Jul 27, 2023 · US
Power conversion apparatus
US-11489475-B2 · Nov 1, 2022 · US
Low acoustic noise open loop motor startup
US-11476784-B1 · Oct 18, 2022 · US
Current-sourced motor drive control for AC motors
US-11329590-B2 · May 10, 2022 · US
Thyristor starter
US-11239769-B2 · Feb 1, 2022 · US
Thyristor starter
US-11233466-B2 · Jan 25, 2022 · US
Thyristor starter
US-11211882-B2 · Dec 28, 2021 · US
Operating circuit for coupling a synchronous machine with a voltage network and method for operating it
US-11201558-B2 · Dec 14, 2021 · US
Power conversion apparatus
US-2021234491-A1 · Jul 29, 2021 · US
Thyristor starter
US-2021152104-A1 · May 20, 2021 · US
Thyristor starter
US-2021083602-A1 · Mar 18, 2021 · US
Thyristor starter
US-10951144-B2 · Mar 16, 2021 · US
Connecting device for motor and supply network
US-10778122-B2 · Sep 15, 2020 · US
Thyristor starter
US-2020177111-A1 · Jun 4, 2020 · US
Current-Sourced Motor Drive Control for AC Motors
US-2020177120-A1 · Jun 4, 2020 · US
Frequency converter, bypass frequency conversion control system and switching control method thereof
US-10601356-B2 · Mar 24, 2020 · US
Thyristor starter
US-2020076339-A1 · Mar 5, 2020 · US
Variable-speed operation control apparatus and hydroelectric power generation system
US-10425027-B2 · Sep 24, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H02P1/52?
- CPC H02P1/52 is the Cooperative Patent Classification code for “by progressive increase of frequency of supply to motor.”
- How many patents are filed under CPC H02P1/52 (by progressive increase of frequency of supply to motor)?
- Our database includes 70 publications tagged with this CPC code.
- Is patent activity under CPC H02P1/52 growing?
- Publication counts under this code: 2 in 2024 vs 5 in 2025 (latest complete years).