DIRECT CURRENT-ALTERNATING CURRENT VOLTAGE CONVERTING CIRCUIT

摘要

A direct current-alternating current voltage converting circuit is used for converting a direct current low voltage to output an alternating current output voltage. The voltage converting circuit includes a boost circuit (201) for inverting and boosting the direct current low voltage into a high frequency alternating current high voltage, a bridge rectifier circuit (202) for rectifying the high frequency alternating current high voltage to obtain a direct current high voltage, a first capacitor (C1) and a second capacitor (C2) connected in series across the output ends of the bridge rectifier circuit (202), a first switch (S1) and a second switch (S2) connected in series across the output ends of the bridge rectifier circuit (202), a waveform generation circuit (206) for controlling the first switch (S1) and the second switch (S2), and an alternating current output circuit (204) for outputting the alternating current output voltage. A first output end (A) of the alternating current output circuit (204) is connected to a common node (5) of the first capacitor (C1) and the second capacitor (C2), and a second output end (B) is connected to a common node (6) of the first switch (S1) and the second switch (S2). Since the voltage converting circuit utilizes only two switch elements at the output side and does not need a high voltage drive circuit, the circuit is simple relatively and can save cost and space.