Anordning för styrning av spännings-laddningsstyrda krafthalvledarelement

摘要

An apparatus for controlling voltage-charge controlled power semiconductor devices in converting electric power comprises members (18-25) adapted to detect selected parameters describing the function of the power semiconductor device through the connection to the power semiconductor device. The apparatus has also means (26) adapted to compare the value of the selected function parameters detected with reference levels thereof, a programmable circuit (16) adapted to generate said reference levels for comparison and process data resulting from the comparison so as to on the basis thereof on its output deliver a digital signal corresponding to an order of a predetermined current level to or from the gate of the device, and a current stiff amplifier (30) being digitally controlled and adapted to receive the digital signal from the programmable circuit and on the basis thereof generate a current to or from the gate of the power semiconductor device with said predetermined current level for controlling the device.