Switching Frequency Control for a DS-PWM

Konferenz: PCIM Europe 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05.06.2018 - 07.06.2018 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2018

Seiten: 8Sprache: EnglischTyp: PDF

Persönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt

Klein, Axel; Thielmann, Malte; Schumacher, Walter (Technical University of Braunschweig, Germany)

In 2014 Homann and Schumacher presented a new PWM-modulator (ΔƩ-PWM). This hysteresis based modulator allows to fully utilize the advantages of the δ σ signal processing (DSSP). Because of the hysteresis based switching cycle of the ΔƩ-PWM one main feature is a variable switching frequency. In this paper a method for controlling the average switching frequency is presented. In order to guarantee a lower PWM frequency boundary, an frequency guard is presented. The paper finishes with an experimental verification of the presented PWM frequency controller and frequency guard.