Z-Source inverters, consisting of both inductors and capacitors as DC-link components, provide unique boost capability in contrast to conventional inverters. The simple structure needs no additional switching elements and only small step-up chokes. The authors describe how to enhance the new drive topology for regenerating operation in conjunction with a 3-phase supply. Derived from waveforms and characteristics, a simple open-loop control scheme for the line side rectifier is presented. The suitability for standard drives applications is verified by experimental results.
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