8-0-8 TRANSFORMER necessary for modified sine-wave

Thread Starter

adeel

Joined Jun 28, 2008
16
hi . friends
i want to make an inverter which will give modified sine-wave but when i research i found that only 8-0-8 or 10-0-10 volts transformer can give modified sine-wave . i want to use 12-0-12 volts transformer . for this purpose . i think if i increase the 220 volts winding of transformer i can get required volts . am i rite . please help me . thank.
 

Audioguru

Joined Dec 20, 2007
11,248
A modified sinewave inverter has a waveform like a square-wave but with a higher voltage step at each halfwave. So the peak of the step is the same voltage as the peak of a sinewave.

As I told him on another website, the transformer must have the correct ratio to produce the correct RMS output voltage.
A 12V-0V-12V transformer is used with Mosfets to produce a simple square-wave inverter. The peak voltage of a square-wave is the same as its RMS voltage.

If a 12V-0V-12V transformer is used with a modified sinewave inverter circuit then the RMS output voltage will be about 0.707 times too low.
 
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