NPC circuit capable of improving reactive efficiency

The invention relates to the technical field of inverter circuits, in particular to an NPC circuit for improving reactive efficiency, which is characterized in that a first end of an upper bridge arm is connected with a positive end, a second end is connected with a bus output end, and a third end is connected with a zero line end; the first end of the lower bridge arm is connected with the negative end, the second end of the lower bridge arm is connected with the bus output end, and the third end of the lower bridge arm is connected with the zero line end; the anode of the backward diode is connected with the bus output end, and the cathode of the backward diode is connected with the positive end or the negative end; the reverse diode is used for forming a reverse recovery current path when the NPC circuit is in a reactive working condition. The reverse recovery circuit has the beneficial effects that the reverse diode which is conducted from the bus to the positive end or the negative end is introduced, and