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Unipolar switching scheme (USS) and bipolar switching scheme (BSS) are popular choices of switching techniques for most inverter applications. Ideally, the output waveform with USS has lower switching loss and harmonic distortion than that with BSS. However, due to the narrow pulses generated around the zero-crossing region, the practical output waveform with USS exhibits pulse-dropping phenomenon...
A hybrid pulsewidth modulation (PWM) scheme that hybridizes the advantages of unipolar switching scheme (USS) and bipolar switching scheme (BSS) for grid-connected current source inverter (CSI) is presented. The former switching scheme has the advantage of low switching losses while the latter one has the advantage of generating output with low total harmonic distortion (THD). The inverter bridge...
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