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Design and Control of a Buck-Boost DC-DC Power Converter


R. Vujanic

Semester/Bachelor Thesis, SS 08

The DC-DC converters are used to deliver a controlled DC voltage from an unregulated DC-supply to a load in many applications. The power is ranging from the watt (computer power supply, mobile phones) to the megawatt (traction vehicles). The converter can increase or decrease the voltage depending on its structure. There are many different DC-DC converter structures fulfilling different application requirements. The requirement of the investigated converter is to supply a load that needs a voltage (converter output voltage) that can be above or below the available DC voltage (converter input voltage). The conventional buck-boost converter fulfills this requirement however it is inverting the output voltage which can therefore only be negative. This is a limiting factor that prevents integrating the structure on silicon. A more complex structure with four switches, the H-bridge converter, can solve the problem (Fig 1.). DC-DC converterUnregulated supplyRegulated output Fig 1. Buck-boost converter with common ground The goal of the project is to derive a MPC controller such that the output voltage is regulated and the energy efficiency is maximized.


Type of Publication:

(13)Semester/Bachelor Thesis

S. Mariéthoz

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% Autogenerated BibTeX entry
@PhdThesis { Xxx:2008:IFA_3176
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