Soft switching three-phase gird-connected inverter additionally provided with freewheeling path
A soft-switching and inverter technology, applied in the field of soft-switching three-phase grid-connected inverters, can solve the problems of large switching loss of devices, reduced circuit efficiency, large electromagnetic interference, etc., to improve power density, improve circuit efficiency, The effect of increasing the working frequency
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[0022] refer to figure 2 , the soft-switching three-phase grid-connected inverter with additional freewheeling path of the present invention includes the inverter DC side power supply V dc , consisting of six fully controlled main switches S with anti-parallel diodes 1 , S 2 , S 3 , S 4 , S 5 and S 6 The three-phase bridge arms formed are respectively connected to the output filter inductance L between the midpoint of each phase bridge arm and the AC grid a , L b and L c , a fully controlled switch S with anti-parallel diodes is connected in parallel on the three-phase bridge arm 8 , full control switch S 8 Parallel capacitance C 8 , the six main switches S of the three-phase bridge arm 1 , S 2 , S 3 , S 4 , S 5 and S 6 Parallel capacitor C 1 、C 2 、C 3 、C 4 、C 5 and C 6 , power supply V on the DC side of the inverter dc The auxiliary switch S with anti-parallel diode is connected between the DC bus of the three-phase bridge arm 7 with clamp capacitor C...
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