Distributed phase-shifting transforming power supply system
US-12573942-B2 · Mar 10, 2026 · US
for changing the number of phases
for changing the number of 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 | H01F30/14 |
| Official title | for changing the number of phases |
| Display label | for changing the number of phases |
| Total patents | 42 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 4 |
| 2019 | 4 |
| 2020 | 6 |
| 2021 | 9 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Autotransformer, autotransformer-rectifier unit and method for connecting a piece of electrical equipment to a three-phase grid by means of an autotransformer-rectifier unit
US-12266469-B2 · Apr 1, 2025 · US
High-frequency transformer
US-12057256-B2 · Aug 6, 2024 · US
High-frequency transformer
US-2024120144-A1 · Apr 11, 2024 · US
Distributed phase-shifting transformer power supply system
US-2023386738-A1 · Nov 30, 2023 · US
Autotransformer, autotransformer-rectifier unit and method for connecting a piece of electrical equipment to a three-phase grid by means of an autotransformer-rectifier unit
US-2023274877-A1 · Aug 31, 2023 · US
Auto-balancing transformers
US-11309933-B2 · Apr 19, 2022 · US
Power system architecture with reduced common mode voltage
US-11277075-B2 · Mar 15, 2022 · US
Autotransformer rectifier unit winding arrangement
US-2021319945-A1 · Oct 14, 2021 · US
Ten-phase auto transformer rectifier unit
US-11120939-B2 · Sep 14, 2021 · US
Multi-phase shift transformer based ac-dc converter
US-2021234469-A1 · Jul 29, 2021 · US
Power system architecture with reduced common mode voltage
US-2021218340-A1 · Jul 15, 2021 · US
Multi-phase shift transformer based AC-DC converter
US-10978963-B2 · Apr 13, 2021 · US
Ten-Phase Auto Transformer Rectifier Unit
US-2021098188-A1 · Apr 1, 2021 · US
Autotransformer rectifier unit with multiple alternating current level outputs
US-10950382-B1 · Mar 16, 2021 · US
Regenerative cascaded H bridge power supply
US-10924025-B2 · Feb 16, 2021 · US
Regenerative cascaded H bridge power supply
US-10924026-B2 · Feb 16, 2021 · US
Regenerative cascaded h bridge power supply
US-2020343820-A1 · Oct 29, 2020 · US
Regenerative cascaded h bridge power supply
US-2020343821-A1 · Oct 29, 2020 · US
Multi-pulse constant voltage transformer for a variable speed drive in chiller applications
US-10707800-B2 · Jul 7, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F30/14?
- CPC H01F30/14 is the Cooperative Patent Classification code for “for changing the number of phases.”
- How many patents are filed under CPC H01F30/14 (for changing the number of phases)?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC H01F30/14 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).