Lumbreras Magallón, DavidBarrios Rípodas, ErnestoNavarrete, ManuelBalda Belzunegui, JuliánGonzález Senosiain, RobertoSanchis Gúrpide, Pablo2021-09-142021-11-302020D. Lumbreras, E. L. Barrios, M. Navarrete, J. Balda, R. Gonzalez and P. Sanchis, 'Active control for medium-frequency transformers flux-balancing in a novel three-phase topology for cascaded conversion structures,' 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), 2020, pp. 1-6, doi: 10.1109/COMPEL49091.2020.9265754.978172817160910.1109/COMPEL49091.2020.9265754https://academica-e.unavarra.es/handle/2454/40475Efficiency and power density are important parameters in the design of power electronics converters. In many applications, low-frequency transformers are being substituted for medium-frequency and high-frequency transformers in order to reduce the volume and therefore the cost of the transformer. However, preventing their saturation is a complex task. This paper studies the medium-frequency transformers' flux balancing in a novel three-phase topology for cascaded conversion structures.Based on the modulation technique of the converter, a method to directly measure the magnetizing current of the medium-frequency transformers is proposed in this paper. A control loop to regulate the dc value of the magnetizing current is also designed and developed. Simulation results validate the correct operation of the control loop, which prevents the transformer saturation.6 p.application/pdfeng© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work.High-frequency transformerMagnetizing currentMedium-frequency transformerPhotovoltaic systemSaturationinfo:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/openAccessAcceso abierto / Sarbide irekia