Research on Control Strategy of High-power Three-phase Combined Inverter = 고전력 삼상 복합 인버터 제어 전략 연구 -BY ZHANG HUAYING-Department of Electrical Engineering Graduate School of Konkuk University

Research on Control Strategy of High-power Three-phase Combined Inverter = 고전력 삼상 복합 인버터 제어 전략 연구 -BY ZHANG HUAYING-Department of Electrical Engineering Graduate School of Konkuk University 

ABSTRACT Research on Control Strategy of High-power Three-phase Combined Inverter Zhang Hua Ying Department of Electrical engineering Graduate School of Konkuk University 

Three-phase voltage-type inverters are used in various occasions, such as static reactive power compensator, uninterruptible power supply distribution network development system, motor control, etc. In today's world where energy is scarce, research on inverters and their control technology is of great significance and is gaining more and more attention. People have higher and higher requirements for inverter power supplies. High-performance, high-reliability high-power inverters are one of the development trends of inverter power supplies. In the high-power inverter power supply, the current on the main circuit power device is relatively large, which can reach hundreds of amps, or even thousands of amps. There are two main ways to increase the capacity of the inverter power supply. And parallel technology using inverters to achieve power modularity. This article takes 30kVA combined three-phase inverter as the research object, adopts PID control method, mainly studies the waveform control of high-power three-phase inverter, and focuses on the main circuit structure and system of high-power three-phase inverter. The mathematical model and waveform control were analyzed and studied in detail. The structure of the three-phase combined inverter suitable for high power is analyzed, the main circuit design of the combined threephase inverter with 30KVA is given, and the combined three-phase inverter established and analyzed under different coordinate systems The mathematical model of the model is simulated and studied according to vi the parameter settings.

ORIGINAL LINK :https://www.riss.kr/search/detail/DetailView.do?p_mat_type=be54d9b8bc7cdb09&control_no=ef54d3a0876fa98cffe0bdc3ef48d419&keyword=INVERTER 

65 anos de UFSM: entrevista com o reitor Luciano Schuch-Reitor entre 2022 e 2025, Schuch destacou-se por investimentos na inovação, qualidade de trabalho na universidade e incentivo no aumento de índices

 

Em celebração aos 65 anos da Universidade Federal de Santa Maria (UFSM), comemorados em 14 de dezembro de 2025, a Agência de Notícias e a TV Campus, vinculadas à Coordenadoria de Comunicação Social, lançaram a série “Direto do Gabinete”, um conjunto de entrevistas com as ex-reitorias da instituição. Publicadas em formato multimídia, as produções buscam valorizar a memória da Universidade e salientar os principais avanços na trajetória de cada gestão. O sétimo entrevistado da série é o professor Luciano Schuch, décimo segundo reitor da UFSM, entre 2022 e 2025. Formado em Engenharia Elétrica pela Instituição, Schuch foi vice-reitor na gestão de Paulo Burmann, entre 2018 e 2021. Sua gestão buscou fortalecer o ecossistema de inovação da UFSM, implementou o Programa de Gestão e Desempenho (PGD) e incentivou o aumento dos índices de qualidade dos cursos.

 ORIGINAL LINK:https://www.ufsm.br/2025/12/22/65-anos-schuch

Do Brasil para Kassel: Três estudantes conquistam o Prêmio Estadual de Energia-colaboração entre a Universidade de Kassel, a Universidade Federal do Ceará (UFC) e a Universidade Federal de Campina Grande (UFCG), no Brasil

 

Do primeiro encontro em 1998 ao Prêmio Estadual de Energia de Hesse 2026: A longa colaboração entre a Universidade de Kassel, a Universidade Federal do Ceará (UFC) e a Universidade Federal de Campina Grande (UFCG), no Brasil, culminou com o primeiro lugar na categoria Jovens Talentos para os estudantes internacionais Vitor Dourado, Eduardo Simões e Arthur de Queiroz. A equipe desenvolveu uma nova abordagem para transformadores de rede, tornando-os mais compactos e inteligentes, além de integrar o armazenamento em baterias. Utilizando transformadores de alta frequência, inversores modulares no nível da bateria e controle descentralizado, o volume e o peso do sistema foram significativamente reduzidos, possibilitando modos de operação mais flexíveis. O excesso de energia armazenada pode ajudar a estabilizar a rede elétrica em áreas com alta proporção de energia renovável. Além disso, pode ser utilizado para carregar veículos elétricos ou para operação fora da rede. No ano passado, os alunos trabalharam na Universidade de Kassel sob a supervisão do Prof. Jens Friebe, tanto presencialmente quanto no Brasil, sob a supervisão dos Profs. Fernando Antunes, Demercil de Souza e Montie Vitorino. Durante o período em Kassel, os alunos adquiriram experiência e ampliaram seus conhecimentos na área, contribuindo significativamente para o desenvolvimento do primeiro protótipo em escala laboratorial. O Prêmio Estadual de Hesse para Soluções Inovadoras em Energia reconhece conceitos para a geração, armazenamento, distribuição e utilização de energia. O prêmio em dinheiro para os vencedores na categoria jovens talentos é de € 2.500.

FONTE ORIGINAL : https://www.uni-kassel.de/uni/aktuelles-aus-der-universitaet/meldung-startseite/2026/09/11/von-brasilien-nach-kassel-drei-studierende-gewinnen-hessischen-staatspreis-energie.html?cHash=f809fdb4f7e1bbbd9acb07d58274d665

Trends in Isolated Power Converters Using High-Frequency Transformers Takaharu Takeshita*,a, Fellow Wataru Kitagawa*, Senior Member Kohei Budo-Department of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan

Trends in Isolated Power Converters Using High-Frequency Transformers Takaharu Takeshita*,a, Fellow Wataru Kitagawa*, Senior Member Kohei Budo**, Member 

Department of Electrical and Mechanical Engineering, Nagoya Institute

of Technology, Gokiso, Showa, Nagoya 466-8555, Japan

**Department of Electrical, Electronic and Computer Engineering, Gifu

University, 1-1 Yanagido, Gifu City 501-1193, Japan

This paper surveys recent trends in isolated power converters using high-frequency transformers, which are used in DC power distribution systems and chargers for electric vehicles, etc. This paper explains the trends in the magnetic materials used in highfrequency transformers for galvanic isolation, the circuit configurations of DC-DC and AC-DC converters using high-frequency transformers, and isolated modular multilevel converters for large capacity applications. © 2026 Institute of Electrical Engineers of Japan and Wiley Periodicals LLC.

ORIGINAL LINK :https://onlinelibrary.wiley.com/doi/epdf/10.1002/tee.70259

Evaluation of Magnetic Materials for Very High Frequency Power Applications Yehui Han, Member, IEEE, Grace Cheung, An Li, Charles R. Sullivan, Member, IEEE, and David J. Perreault, Senior Member, IEEE

 Evaluation of Magnetic Materials for Very High Frequency Power Applications Yehui Han, Member, IEEE, Grace Cheung, An Li, Charles R. Sullivan, Member, IEEE, and David J. Perreault, Senior Member, IEEE

 Abstract—This paper investigates the loss characteristics of rf magnetic materials for power conversion applications in the 10 MHz to 100 MHz range. A measurement method is proposed that provides a direct measurement of inductor quality factor QL as a function of inductor current at rf frequencies, and enables indirect calculation of core loss as a function of flux density. Possible sources of error in measurement and calculation are evaluated and addressed. The proposed method is used to identify loss characteristics of several commercial rf magnetic core materials. The loss characteristics of these materials, which have not previously been available, are illustrated and compared in tables and figures. The use of the method and data are demonstrated in the design of a magnetic-core inductor, which is applied in a 30 MHz inverter. The results of this paper are thus useful for design of magnetic components for very high frequency (VHF) applications. Index Terms—Magnetic materials, resonant inductor, very high frequency (VHF), Steinmetz parameters. I. INTRODUCTION There is a growing interest in switched-mode power electronics capable of efficient operation at very high switching frequencies (e.g., 10 – 100 MHz). Power electronics operating at such frequencies include resonant inverters [1]–[10] (e.g., for heating, plasma generation, imaging, and communications) and resonant dc-dc converters [1], [3], [11]–[20] (which utilize high frequency operation to achieve small size and fast transient response.) These designs utilize magnetic components operating at high flux levels, and often under large flux swings. Moreover, it would be desirable to have improved magnetic components for rf circuits such as matching networks [21]–[25]. There is thus a need for magnetic materials and components suitable for operation under high flux swings at frequencies above 10 MHz. Unfortunately, most magnetic materials exhibit unacceptably high losses at frequencies above a few megahertz. Moreover, the few available bulk magnetic materials, which are potentially suitable for frequencies above 10 MHz, are typically only characterized for small-signal drive conditions, and Y. Han is with the University of Wisconsin-Madison, 2559C Engineering Hall, 1415 Engineering Drive, Madison, WI 53706 USA (e-mail: yehui@engr.wisc.edu). G. Cheung is with Intersil Corp (e-mail: gmcheung@gmail.com). A. Li is with Massachusetts Institute of Technology, MA 02139 USA (email: anli@mit.edu). C. R.

FULL PAPER: https://dspace.mit.edu/entities/publication/886eec02-daf1-451f-ab37-e797d79313b8