ANALYSIS OF A BIDIRECTIONAL COUPLED-INDUCTOR CUK CONVERTER OPERATING IN SLIDING MODE

Analytic models for a bidirectional coupled-inductor Cuk converter ope rating in sliding mode are described. Using a linear combination of th e converter four state variable errors as a general switching surface, the expression for the equivalent control is derived and the coordina tes of the equilibrium point are obtained. Particular cases of the gen eral switching surface are subsequently analyzed in detail: 1) surface s for ideal line regulation, 2) surfaces for ideal load regulation, an d 3) surfaces for hysteretic current control. Simulation results verif ying the analytical predictions are presented.