Abstract
This work deals with the novel application of the sliding mode (discontinuous) output regulation theory to a nonlinear electrical circuit, the so-called boost power converter. This theory has excelled due to the fact that trajectory tracking plays a central role. The control of a boost power converter for the output tracking of a DC biased sinusoidal signal is a challenging problem for control engineers. The main difficulties are the computation of a proper reference signal for the inductor current, and the stabilization of the inductor current dynamics or to guarantee the correct output tracking of the capacitor voltage. With the application of the discontinuous output regulation these problems are solved in this work. Simulations and real time experiments were carried out with an unknown variation of the DC input voltage, where the good output tracking of the capacitor voltage was verified along with the stabilization of the inductor current. The discontinuous output regulation theory has proven to be a suitable tool in the output tracking for the boost power converter.
Highlights
Switched mode DC-DC power converters [1], are mainly used as constant current sources for LEDs, industry lighting, mobile phones, and photovoltaic systems [2,3]
Despite the tremendous effort by researchers, this problem have not been addressed by output regulation theory
An enhanced version of this theory is obtained when combined with sliding modes, known as discontinuous output regulation
Summary
Switched mode DC-DC power converters [1], are mainly used as constant current sources for LEDs, industry lighting, mobile phones, and photovoltaic systems [2,3]. After the work presented in [17], the control design for the output tracking of a DC biased sinusoidal signal for a single boost power converter, became popular among researchers, where two control methods are distinguished: the direct and indirect methods. These control methods are characterized by the following problems:. Based on the direct control method principle, the aims of this work are the application of an improved state feedback discontinuous output regulator for the output tracking problem of a DC biased sinusoidal signal on a DC-DC boost power converter, and the validation of the proposed controller by means of real time experimentation.
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