Power conversion device canceling a common mode voltage
US10700616B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 27, 2016 |
| Grant date | Jun 30, 2020 |
| Priority date | — |
| Expiry date | Oct 27, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/4815
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power conversion device that converts electric power by having a power semiconductor element perform a switching operation includes a voltage detector detecting a common mode voltage generated in the switching operation of the power semiconductor element, a voltage control power supply that generates a voltage opposite in polarity to and as high as the common mode voltage with a circuit that amplifies power of the common mode voltage detected by the voltage detector, and a voltage superimposition structure canceling the common mode voltage not lower than a switching frequency generated in the switching operation of the power semiconductor element, by superimposing the voltage generated by the voltage control power supply on an output from the power conversion device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.