How Does DC to AC Inverter Circuit Works

Posted on Feb 6, 2014

DC to AC inverter`s function is to convert Direct Current (DC) voltage to Alternating Current (AC) voltage. DC to AC inverter is commonly used for converting High Voltage DC (HVDC) transmission voltage back to AC, and for converting the DC output voltage of a photovoltaic (PV) solar panel to suitable AC voltage. The output AC voltage of the invert

How Does DC to AC Inverter Circuit Works
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er can be a 60 Hz square wave or a pure sine wave. Of course, an inverter with pure sine wave output is more expensive than with a square wave output because of additional filters used. Basically, the power amplifier circuit just amplifies the output 60 Hz signal of the signal generator to approximately 24 V (peak-to-peak) square wave voltage. If this is to be use to convert a DC voltage to AC like in PV system or in HVDC to AC conversion, the DC voltage input will be connected in the DC 24V  terminals. Note that the above circuit doesn`t have a filter yet to filter out the high frequency component of the square wave to come up with a pure sine wave signal. At load side, the voltage should like this; In commercially available DC to AC inverters, a sophisticated filter is used to produce a pure sine wave output. These kind of filters is, basically, a high pass filter that completely remove all of the signal with frequencies more than 60 Hz.

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