Pre-charge circuit and photovoltaic inverter
US9912252B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2016 |
| Grant date | Mar 6, 2018 |
| Priority date | — |
| Expiry date | May 25, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/56
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a pre-charge circuit and a photovoltaic inverter. The pre-charge circuit includes an alternating current power source, a half-bridge rectifier, an auxiliary charging capacitor, a current limiting device and a controllable switch. The pre-charge circuit is connected to a target charging capacitor to form a voltage doubling rectifier circuit. A direct current side of the half-bridge rectifier is connected in parallel to the target charging capacitor, and an alternating current side of the half-bridge rectifier is connected to one end of the alternating current power source. One end of the auxiliary charging capacitor is connected to any one end of the target charging capacitor, and the other end of the auxiliary charging capacitor is connected to the other end of the alternating current power source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.