A NOVEL SWITCH-MODE DC-TO-AC INVERTER WITH NONLINEAR ROBUST-CONTROL

A switch-mode dc-to-ac inverter based on a dc-to-dc converter topology using a novel nonlinear robust control to generate a sinusoidal outpu t waveform is presented. The control scheme is based on simultaneous f eedback of the output voltage and feedforward of the input voltage and inductor voltage. As a result, the output voltage remains dynamically unchanged when there are large disturbances in input voltage pr load current. The nature of the control law is explained, Computer simulati on results show the robustness and fast dynamical response of the cont rol system. The experimental results are presented to verify the analy sis and demonstrate the feasibility of the control strategy.