Design and implementation of an output feedback controller for the Cuk converter

The Cuk converter is a non-isolated DC-DC converter having fourth-order and non-linear dynamic characteristics. In this paper, an output feedback controller is proposed for the regulation of the negative output Cuk converter. The main advantage of the proposed controller is only the output voltage state variable is used for feedback purposes. This eliminates the use of the current sensor. Various issues concerning the controller design like the detailed stability and feasibility analysis are also discussed to get some insight into the controlled system. Experimental results showing the feasibility of the proposed controller under the load and reference input variations are also provided to validate the theoretical design.