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US 4,063,302 AGranted
Protection arrangement for an inverter
AssigneeSiemens Aktiengesellschaft
InventorsGerhard Donig, Manfred Muller
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AssigneeSiemens Aktiengesellschaft
InventorsGerhard Donig, Manfred Muller
Estimating the term…
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.
A protection arrangement for use in protecting the valves in the valve branches of an inverter, the inverter being of a type having first and second fuses connected in series with its respective first and second d-c inputs, which inputs are adapted to receive a d-c input voltage, and of a type having a control unit for delivering firing pulses to said valve branches, said protection arrangement comprising:
A protection arrangement for use in protecting the valves in the valve branches of an inverter, the inverter being of a type having first and second fuses connected in series with its respective first and second d-c inputs, which inputs are adapted to receive a d-c input voltage, and of a type having a control unit for delivering firing pulses to said branches, said protection arrangement comprising:
Dependencies are inferred from the claim text.