Dynamic analysis of a new single-switch AC-AC converter for induction heating applications

In this paper the dynamic analysis of the open- and closed-loop systems of a new single-switch AC-AC frequency converter is presented. The main advantages of the proposed converter are that it provides a sine wave input current and a close to unit power factor. The converter circuit dynamic analysis is performed in small-signal quantities. The analytical expressions of the transfer function of the open and closed-loop systems with the integrator regulator are obtained. The results of the theoretical analysis were checked on the PSPICE-model and on the laboratory prototype and they are in good agreement with the experiments.