Balancing parallel inverter systems
US6452290B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 11, 2001 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Jul 11, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0085
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inverter parallel operation system includes a first inverter adapted to control the output frequency thereof by controlling a control element. The system includes the inverter, and a second inverter and subsequent inverters adapted to control the output frequency thereof by controlling control elements comprising the inverters. Power being fed to a common load after a choke coil provided on the output-side end of a first filter provided on the output side of the first inverter has been connected to a choke coil provided on the output-side end of the second filter on the output side of the second and subsequent inverters. The improvement comprising controlling effective powers output by the first inverter, and the second and subsequent inverters by detecting the effective powers output by both the inverters and controlling any one or both of the output frequencies predetermined in accordance with the effective powers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.