A power electronic circuit, comprising a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor, a fifth switching transistor, a sixth switching transistor, a first capacitor, a second capacitor, a first inductor, and a second inductor, wherein: the first capacitor and the second capacitor are serial connected between an input positive bus (+BUS) and an input negative bus (-BUS), wherein the first capacitor and the second capacitor are connected to a fifth node; the first switching transistor, the second switching transistor, the third switching transistor, and the fourth switching transistor are serial connected between the input positive bus (+BUS) and the input negative bus (-BUS); the first switching transistor and the second switching transistor are connected to a first node, the second switching transistor and the third switching transistor are connected to a second node, and the third switching transistor and the fourth switching transistor are connected to a third node; the fifth switching transistor and the sixth switching transistor are connected to a fourth node, the fifth switching transistor is connected to the first node through the first inductor, and the sixth switching transistor is connected to the third node through the second inductor; and the second node is connected to the fifth node, characterized in that the power electronic circuit further comprises a seventh diode and an eighth diode; an anode of the seventh diode is connected to a common terminal of the first inductor and the fifth switching transistor, and a cathode of the seventh diode is connected to the input positive bus (+BUS); and an anode of the eighth diode is connected to the input positive bus (+BUS), and a cathode of the eighth diode is connected to a common terminal of the second inductor and the sixth switching transistor. the first capacitor and the second capacitor are serial connected between an input positive bus (+BUS) and an input negative bus (-BUS), wherein the first capacitor and the second capacitor are connected to a fifth node; the first switching transistor, the second switching transistor, the third switching transistor, and the fourth switching transistor are serial connected between the input positive bus (+BUS) and the input negative bus (-BUS); the first switching transistor and the second switching transistor are connected to a first node, the second switching transistor and the third switching transistor are connected to a second node, and the third switching transistor and the fourth switching transistor are connected to a third node; the fifth switching transistor and the sixth switching transistor are connected to a fourth node, the fifth switching transistor is connected to the first node through the first inductor, and the sixth switching transistor is connected to the third node through the second inductor; and the second node is connected to the fifth node, characterized in that the power electronic circuit further comprises a seventh diode and an eighth diode; an anode of the seventh diode is connected to a common terminal of the first inductor and the fifth switching transistor, and a cathode of the seventh diode is connected to the input positive bus (+BUS); and an anode of the eighth diode is connected to the input positive bus (+BUS), and a cathode of the eighth diode is connected to a common terminal of the second inductor and the sixth switching transistor.