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Main Title: Adaptive control of a boost-buck converter for thermoelectric generators
Author(s): Carstens, Jan Hendrik
Gühmann, Clemens
Type: Conference Object
Language Code: en
Abstract: Thermoelectric generators (TEGs) are used to recover waste heat of the exhaust gas and convert it into electric energy in automotive applications. The temperature of the waste heat influences the voltage and internal resistor of a TEG. For the electric linking of TEGs to the on-board power supply, a DC-DC converter may be used. The control of the DC-DC converter must be robust against dynamic changes and additionally has to track the maximum power point (MPP) of the TEG. This paper presents a digital cascade controller for a boost-buck converter to charge a vehicle battery and to supply the load. To track the MPP, a hill climbing (HC) algorithm is implemented, which is also used for photovoltaics. The conversion time of the HC is minimized with an adaptive step size. Width variations of electric parameters of TEG influence the dynamic and stability of the controllers. With a closed loop identification, the parameter variation is estimated, and the control parameters can be redesigned. An experimental result show the efficiency of the adaptive control.
Issue Date: 2014
Date Available: 11-Jan-2016
DDC Class: 600 Technik, Technologie
Subject(s): DC-DC converter
thermoelectric generators
maximum power point trackers
thermoelectric conversion
thermoelektrischer Generator
thermoelektrische Umwandlung
Sponsor/Funder: BMBF, 03X3553E, Thermoelektrische Generatoren 2020
Proceedings Title: 2014 European Control Conference (ECC 2014) : Strasbourg, France, 24 - 27 June 2014
Publisher: IEEE
Publisher Place: Piscataway, NJ
Publisher DOI: 10.1109/ECC.2014.6862328
Page Start: 2121
Page End: 2126
ISBN: 978-3-9524269-1-3
Appears in Collections:FG Elektronische Mess- und Diagnosetechnik » Publications

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