Inverter system
US7492162B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 2006 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Dec 27, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/122
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inverter system which converts DC input into AC output and supplies the AC output to a load such as an FL tube detects change in a circuit current due to anomaly such as discharge without contacting with a current route. Relating to an inverter which converts DC input into AC output and supplies the AC output to a load, change in a circuit current of the inverter is detected through the medium of magnetic flux change due to the change in the circuit current caused by discharge. For example, if change in a current occurs in the circuit current of the inverter by disconnection discharge or ground-fault discharge occurring in a current route including a load of the inverter, magnetic flux change occurs in circuit wiring and a space of a core gap of a transformer of the inverter. The change in the circuit current is detected through the medium of the magnetic flux change without contacting with the circuit wiring or the transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.