Aboutcleggsan Expertise All technical areas of Electronics Engineering.
Experience BSEE, MBA, Design, R&D, University Research.
Senior Life Member of IEEE. Life Fellow of AES.
Organizations IEEE, Consumer Electronics Society, Audio Engineering Society.
Broad teaching experience; work experience mostly in consumer electronics and conversion from analog to digital technologies. Pioneer in digital audio at all levels.
Expert: cleggsan Date: 12/19/2006 Subject: PWM concept and inverter
Question Most inverter use PWM concept.TYhe output of itis a square wave, but how can it(squarewave) relates to inverter fucntion.Meaning to say whenwe have the square wave, what and when the inverter use it and for what purpose?
Answer PWM or pulse width modulation is a means whereby the amount of energy is controlled by the width of the pulses. They can easily be converted, by rectification and filtering, back to a dc power level. The dc is then converted back to an ac output. Or, in some systems the PWM output is kept at the right frequency, 60 Hz, and converted directly to ac with filters.
NOTE: A square wave is the product of a series of sine waves. Filtering out the unwanted sine waves will leave on the sine wave of interest.
