Balancing device stresses by fundamental cancellation

A typical application is examined by simulation to illustrate that traditional methods of harmonic cancellation in power conversion circuits can result in unbalanced conditions. A method is described for deriving suitable waveforms for fundamental elimination. The method involves increasing the repetition interval of the device switching signals, so that the desired output frequency becomes a harmonic of the driving frequency. Because this lower fundamental frequency does not appear in the final output, the method is described as fundamental cancellation.<>