Single-phase inverter, DCAC converter and control method of DCAC converter

The invention provides a single-phase inverter, a DCAC converter and a control method of the DCAC converter. In the DCAC converter comprising a first switching tube, a second switching tube, a third switching tube, a fourth switching tube, a fifth switching tube and a sixth switching tube, the first switching tube, the fifth switching tube and the second switching tube are sequentially connected in series to form a first connection point and a second connection point; the third switching tube, the sixth switching tube and the fourth switching tube are sequentially connected in series to form a third connection point and a fourth connection point; the second connection point and the fourth connection point are connected, the first connection point and the third connection point are respectively output ends of the DCAC converter; or the first connection point and the third connection point are connected, the second connection point and the fourth connection point are respectively output ends of the DCAC convert