NPC NEUTRAL POINT CLAMPED TYPE MULTI-LEVEL INVERTER HAVING NO DEAD-TIME

摘要

According to the present invention, there is provided an NPC type multi-level inverter comprising: a multi-level power supply unit to which at least one voltage source is connected; A first switching unit connected to both ends of the voltage source for interrupting a path of a forward current output from the voltage source; And a second switching unit connected to both ends of the voltage source and interrupting a path of a reverse current flowing to the voltage source. The first switching unit or the second switching unit selectively operates according to the direction of the output current, The circuit is not short-circuited.According to the present invention, since the first switching unit and the second switching unit are connected to the branched line and the forward output current and the reverse output current flow in different paths, the circuit is not short-circuited at the moment of switching the output voltage, And has an inverter circuit configuration of an NPC type that can operate without time.;