DIRECT CURRENT SWITCHING DEVICE AND CONTROL METHOD

摘要

The present invention relates particularly to a direct current switching device comprising at least one switching unit which can be mounted between two terminals. The device can further comprise at least one control unit for controlling the switching unit. The switching unit can comprise at least a first and a second semiconductor switching element, which can be mounted in parallel to each other, and the first switching element can be a high-voltage switching element and the second switching element can be a switching element with little power loss. The switching unit can be controlled by the control unit such that when the switching unit is switched off, first the second switching element can be switched to nonconductive and then the first switching element can be switched to nonconductive, and when the switching unit is switched on, first the first switching element can be switched to conductive and then the second switching element can be switched to conductive.