Discharging DC link capacitors in an NPC converter
US9837922B2 · kind B2 · utility
1Cited by
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20Claims
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Assignee
Inventors
Key dates
| Filing date | Oct 28, 2016 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Oct 28, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/322
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method is disclosed in one embodiment for discharging DC link capacitors. In one form the method includes switching a first half bridge of a first converter unit to a positive state, in which its AC output is connected with its positive DC output, and simultaneously switching a second half bridge of a second converter unit to a negative state, in which its AC output is connected with its negative DC output, such that a DC link capacitor of the first converter unit and a DC link capacitor of the second converter unit are interconnected oppositely to each other and discharged via the electrical filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.