Sliding mode and predictive current control for vienna-type rectifiers

This paper presents an improved nonlinear voltage outer-loop and current inner-loop control scheme for three phase Vienna-type rectifier, which adopted the sliding mode controller (SMC) for the outer dc voltage loop and utilized the predictive current controller (PCC) for the current inner-loop. Compared with the conventional PI, the SMC can highly enhance the dynamic performance and robustness of the dc output voltage. Additionally, the PCC can eliminate current errors caused by control delay, reduce the fluctuation of the input currents, and is well suited to digital control system. Both simulation model and experimental prototype of a 2.2-kW rectifier system are carried out and the results verify that the Vienna-type rectifier with the SMC-PCC nonlinear control strategy has an excellent stability and dynamic performances.