Modeling the Buck Converter from Measurements of Its Harmonic Transfer Function

Sanda Lefteriu ()
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Sanda Lefteriu: IMT Lille Douai, Insitut Mines-Télécom, Center for Digital Systems

A chapter in Realization and Model Reduction of Dynamical Systems, 2022, pp 175-196 from Springer

Abstract: Abstract Buck converters are DC-DC converters which provide a step-down of the input voltage produced by the supply to the output voltage delivered to the load. They contain two semiconductor devices (typically a transistor and a diode) acting as switches which open and close periodically, together with an output filter in the form of an RLC circuit. These considerations render the buck converter as a periodically switched linear system. Thanks to the periodic nature, the Harmonic Transfer Function (HTF) is a suitable tool for modeling the buck converter. This chapter shows how to identify a frequency domain model for the buck converter from measurements of the HTF through the Loewner framework. The measurements are obtained by computing the Fast Fourier Transform (FFT) of the outputs in a small signal analysis. The model corresponds to a single-input multiple-output system with the the number of outputs given by the desired number of harmonics.

Keywords: Periodically switched linear system; Harmonic transfer function; Loewner framework (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-030-95157-3_10

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DOI: 10.1007/978-3-030-95157-3_10

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