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`ABSTRACT
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`A powerinverter, such as a synchronous buck powerinverter, that is configured with a
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`high frequency switching control having a (PWM)controller and sensing circuit.
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`Controller provides a low frequencyoscillating wave to effect switching control on a
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`synchronous-buckcircuit portion that includesa plurality of switches to invert every half
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`cycle of the frequency provided by controller. The inverting process thus creates a positive
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`and negative transition of the oscillating wave signal. A low frequency switching stage
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`includesa further plurality of switches configured to operate as zero voltage switching
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`(ZVS) and zero current switching (ZCS) drives Charge on an output capacitoris
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`discharged to zero on every zero crossing of low frequency switching stage and
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`advantageously discharges energy every half cycle. During this discharge of energy, the
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`zero crossing distortion in the low frequency sine waveis greatly reduced.
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`44
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