Patent ID: 6690592
Filing Date: 2004-02-10
Classification: H02M

Abstract:
An inverter, comprising:a first self-commutated pulse current converter having an AC input side connected to a power mains and a DC output side, said first converter having a first gate-turn-off converter valve of a first circuit topology and implemented as a semiconductor switch operating at a first pulse frequency; at least one second self-commutated pulse current converter having a DC input side and an AC output side connected to a load, said at least one second converter comprising a second gate-turn-off converter valve of a second circuit topology and implemented as a semiconductor switch operating at a second pulse frequency different from the first pulse frequency; and a DC intermediate circuit electrically connecting the DC output side of the first converter to the DC input side of the at least one second converter, wherein the first gate-turn-off converter valves include an insulated gate bipolar transistor (IGBT) and the second gate-turn-off converter valves include a self-blocking field-effect transistor (MOSFET).