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The Structure Principle Of Pv Inverter
Jan 30, 2018

The pv inverter is a power adjusting device composed of semiconductor devices, which is mainly used for direct current power.

Convert to ac power. Generally consists of the booster circuit and the inverter bridge circuit. The booster circuit increases the dc voltage of the solar cell to the dc voltage required by the inverter output control; The inverter bridge circuit converts the dc voltage of the booster to the ac voltage of the common frequency. The pv inverter is mainly composed of transistor and other switch elements, and by means of the rules, the switch element is repeatedly opened -OFF (on-off), so that the dc input becomes ac output. Of course, the output waveform of the inverter produced by the open and closed loop is not practical. Generally need to adopt high-frequency pulse width modulation (SPWM), make the near at the ends of the sine wave voltage width narrow, central sine wave voltage width wider, and always let the switch element in half cycle according to certain frequency moves in one direction, thus formed a pulse wave train (quasi sine wave). Then let the pulse wave form a sine wave through a simple filter.

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