Coupled inductor for interleaved multi-phase three-level DC-DC converters
US10396684B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2015 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Dec 27, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/123
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Output current ripple is reduced in a three-level DC-DC power converter by connecting a plurality of phase legs in parallel between a source of input power and an output of the power converter and conducting power from the source of input power to the power converter output in an interleaved manner. The large current that results from such interleaved operation is reduced to acceptable levels, potentially less than the output current ripple of the power converter by providing inversely coupled inductors having a mutual inductance preferably greater than the inductor of the power converter in respective phase legs and in series in the circulating current path to avoid any need to increase the power converter inductance due to the circulating current. The inductor and inversely coupled inductors are preferably integrated into a single magnetic element of compact design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.