Protection arrangement for an inverter
US4063302A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1976 |
| Grant date | Dec 13, 1977 |
| Priority date | — |
| Expiry date | Mar 22, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/1216
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protection arrangement for an inverter having fuses connected in series with its d-c inputs is disclosed. In particular, in one form of the arrangement, an electronic voltage monitoring device is provided for monitoring the input d-c voltage to the inverter at the connection points of the inverter inputs and the fuses. If the voltage monitored by the monitoring device falls below a predetermined level, the monitoring device delivers a protection signal to the control unit of the inverter directing the latter to release firing pulses for extinguishing the valves in the valves branches of the inverter. In another form of the arrangement, the voltage monitoring device monitors the voltage across each of the fuses at the d-c inputs of the inverter, and, if a monitored voltage exceeds a predetermined value, delivers a protection signal to the control unit of the inverter. Additionally, where the inverter being protected is included in a cycloconverter, provision is made for ensuring that a protection signal is not delivered before sufficient time has elapsed for the intermediate d-c link voltage of the converter to reach a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.