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High Performance Digital Hysteresis Control for Single Source Cascaded Inverters

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3 Author(s)
Attaianese, C. ; Univ. of Cassino & South Lazio, Cassino, Italy ; Di Monaco, M. ; Tomasso, G.

A digital modulation technique for cascaded inverters, which allows achieving high performance with low power losses, is proposed in this paper. It consists in a variable slope-fixed band current hysteresis control applied to a cascaded voltage source inverter structure, fed by a single dc source. The proposed technique can be used to supply ac motors, as well as generic ac loads. A considerable reduction of the switching losses is achieved, without increasing the total harmonic distortion on the load side. This result has been validated by means of a preliminary numeric analysis and confirmed by an experiment implementation.

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Industrial Informatics, IEEE Transactions on  (Volume:9 ,  Issue: 2 )