Control Design Techniques in Power Electronics Devices by Hebertt Sira-Ramírez PhD, Ramón Silva-Ortigoza PhD (auth.)

By Hebertt Sira-Ramírez PhD, Ramón Silva-Ortigoza PhD (auth.)

Control layout strategies in strength Electronics Devices bargains in particular with keep an eye on theories appropriate to the layout of keep watch over devices for switched energy electronics units, for the main half represented by means of DC–DC converters and provides, through rectifiers of alternative forms and by way of inverters with various topologies. The theoretical equipment for designing controllers in linear and nonlinear platforms are observed through a number of case reviews and examples exhibiting their software within the rising box of strength electronics. The booklet is brought during the vitally important subject of modeling switched energy electronics as managed dynamical platforms. specific circuit layouts, schematics and real closed-loop keep watch over responses from a consultant crew of the crops less than dialogue and generated via employing the idea are included.

The keep watch over theories which characteristic within the ebook are: sliding mode keep watch over and suggestions keep an eye on by way of approximate linearization (linear kingdom suggestions, static and dynamic proportional-integral-differential (PID control), output suggestions trough observer layout, Lyapunov-based keep an eye on and passivity-based control). Nonlinear regulate layout tools represented contain: special suggestions linearization, input-output linearization, differential flatness, generalized PID keep an eye on and, back, passivity-based control.

This monograph can be of curiosity to researchers in energy platforms and their similar regulate difficulties. it's going to additionally support tutors and scholars in those fields with its dydactic type and its wealthy resource of worked-out software examples from a vast spectrum of keep an eye on theories.

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28. The Sepic DC-to-DC power converter. 29 depicts the ideal switch realization of the Sepic converter. 7 The Sepic Converter i1 L1 C1 39 u v1 L2 E i2 u v2 C2 R Fig. 29. Sepic converter realization with ideal switches. 53) where υ1 and i1 are, respectively, the voltage across capacitor C1 and the current through the inductor L1 , υ2 and i2 are, respectively, the voltage across the capacitor C2 and the load R, and the inductor current L2 . The source voltage E is constant. The control input u is the switch position function taking values in {0, 1}.

In other words, the dynamics contains as nonlinearities, only the products of the form xi u. 17) where the parameter Q, representing the inverse of a circuit quality factor, is obtained by the relation: Q = R C/L. The variable x1 is the normalized inductor current while x2 represents the normalized output voltage. The switch position function is invariant with respect to the normalization process. 3 Equilibrium Point and Static Transfer Function One of the control objectives, which we desire to achieve when using or designing a DC-to-DC power converter, is to regulate the output voltage so as to stabilize it to a constant value or to track a given reference signal.

43 depicts the tandem connection of two Buck-Boost DC-to-DC power converters. 11 The Double Buck-Boost Converter Q1 Q2 D1 E i1 L1 v1 C1 51 D2 R1 L2 i2 v2 C2 RL Fig. 43. Double Buck-Boost converter circuit. 12 Power Converter Models with Non-ideal Components In this chapter, we have emphasized ideal components in the constitution of dynamical average DC-to-DC power converter models. For instance, we have not considered resistances in series with the inductors, we have neglected parallel conductances in combination with capacitors and have also assumed that the switches have no imperfections attached.

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