VERGLEICHMAESSIGUNG DER SPANNUNGSAUFTEILUNG BEIM ABSCHALTEN EINER REIHENSCHALTUNG GATEGESTEUERTER HALBLEITER

To equalise the distribution of voltage at a series circuit of gate-controlled semiconductors (V1, V2) having turn-off times of different length, it is first determined by delivering the turn-off signals at the same time, with a low current flowing through the series circuit, which of the semiconduc...

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Bibliographic Details
Main Authors NIEHAGE, HELMUT, BEINHOLD, GEORG
Format Patent
LanguageGerman
Published 15.07.1993
Edition5
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
PULSE TECHNIQUE
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Summary:To equalise the distribution of voltage at a series circuit of gate-controlled semiconductors (V1, V2) having turn-off times of different length, it is first determined by delivering the turn-off signals at the same time, with a low current flowing through the series circuit, which of the semiconductors (V1, V2) is the last one to turn off. Then the deliveries of the turn-off signals to the semiconductors (V1, V2) which previously turned off earlier are in each case delayed at higher currents until, finally, at full operating current, until these semiconductors turn off at the same time as the semiconductor with the longest turn-off time. This delay can be compensated via load-current-dependent correction elements (K1, K2) at the ratio of the instantaneous turn-off current values of two successive conductive phases of the series circuit.
Bibliography:Application Number: AT19880730088T