EXTERNAL PARALLEL-CONNECTED TIME-SHARING SELECTIVE SWITCHING VOLTAGE-TYPE SINGLE-STAGE MULTIPLE-INPUT LOW-FREQUENCY LINK INVERTER

The present invention relates to an external parallel-connected time-sharing selective switching voltage-type single-stage multiple-input low-frequency link inverter, the circuit structure thereof is constituted by one external parallel-connected time-sharing selective four-quadrant power switch multiple-input single-output high-frequency inverter circuit connecting multiple commonly-grounded input filters to one shared output low-frequency isolated transformer filter circuit, input ends of the multiple-input single-output high-frequency inverter circuit are correspondingly connected one-to-one to output ends of the input filters, and an output end of the multiple-input single-output high-frequency inverter circuit is connected to an input end of the output low-frequency isolated transformer filter circuit. The inverter has the characteristics of multiple input sources sharing a ground and supplying electricity in a time-sharing manner, output and input being isolated by a low frequency, a shared output low-f