Boundary Control of Inverters Using Second-Order Switching Surface

Concept of using a second-order switching surface in the boundary control of inverters is derived in this paper. The switching surface is formulated by estimating the state trajectory movement after a switching action. It results in a high state trajectory velocity along the switching surface. This phenomenon accelerates the trajectory moving towards the target operating point. Time-domain responses of the inverter with the proposed boundary control method under large-signal variations have been analyzed. The proposed control scheme has been successfully applied to a 100 W full-bridge inverter. Practical implementation of the system is provided. Dynamic responses of the inverter supplying to different kinds of loads, including a resistive load, an inductive load, and a diode-capacitor rectifying circuit, have been studied. Experimental results show that the inverter output voltage can attain a low total harmonic distortion at different load conditions and fast response to a large-signal load disturbance and an output reference voltage change