Common mode filter circuit and drive device
US12308814B2 · kind B2 · utility
Inventors
Key dates
| Filing date | May 31, 2023 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Jan 18, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A common mode filter circuit comprises a common mode transformer unit, an inverter, and a capacitor unit. Each of the first common mode transformer, the second common mode transformer, and the third common mode transformer comprises a first secondary wound wire, a second secondary wound wire, a third secondary wound wire, and a primary wound wire. A ratio of a number of turns of the primary wound wire to a number of turns of the first secondary wound wire, a ratio of a number of turns of the primary wound wire to a number of turns of the second secondary wound wire, and a ratio of a number of turns of the primary wound wire to a number of turns of the third secondary wound wire are each 3:1 in each of the first common mode transformer, the second common mode transformer, and the third common mode transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.