ABSTRACT
This chapter presents a sliding mode approach for the design of control systems for power converters. A cascaded control structure is chosen for ease of control realization and to exploit the motion separation property of power converters. Boost converters are used for applications in which the required output voltage is higher than the source voltage. Conversely, buck converters are used for applications with the output voltage being smaller than the source voltage. Traditionally, the control problems of the DC/DC converters are solved by using pulse width modulation techniques. For DC/DC converters, the input inductor (the word “inductor” is often used in the literature for DC/DC converters instead of “inductance”) current and the output capacitor voltage are normally selected as the state variables. Similar to the direct sliding mode control of DC/DC converters, the chapter investigates inductor current control and subsequently output capacitor voltage regulation based on observed states.
