05. - 07.06.2018
Power Electronics | Intelligent Motion | Renewable Energy | Energy Management
Tuesday, 05.06.2018, 11:00 - 12:40 hrs
Manfred Schrödl, Vienna University of Technology, AT
Decentralized Control of a Twelve-Phase PMSM
This paper presents a decentralized current control for a twelve-phase permanent magnet synchronous machine. The phases of the considered machine are interconnected as four sets of each 3 star-connected phases. The machine has double-layer windings, which leads to a certain magnetic coupling between coils that share one slot. In order to decide, if a decentralized control is satisfying, it is necessary to analyze the impact of the coupling. Furthermore, the proposed control is tested experimentally.
Computationally Efficient Predictive Direct Torque Control Strategy for PMSGs Without Weighting Factors
This paper proposes a computationally efficient predictive direct torque control (PDTC) technique for permanent-magnet synchronous generators (PMSGs) without weighting factors. Therefore, the proposed control scheme overcomes the following drawbacks of the classical PDTC: 1) High calculation burden, and 2) tuning of the weighting factors. Experimental results are presented to verify the feasibility of the proposed control method.
Switching Frequency Control for a DS-PWM
In 2014 Homann and Schumacher presented a new PWM-Modulator (ΔΣ-PWM). This hysteresis based modulator allows to fully utilize the advantages of the delta sigma signal processing (DSSP). Because of the hysteresis based switching cycle of the (ΔΣ-PWM) one main feature is a variable switching frequency. In this paper a method for controlling the average switching frequency will be presented. The paper will finish with an experimental verification of the concept.
Improvements on a Sensorless Controlled Synchronous Reluctance Machine Down to Standstill
In this paper a position - sensorless controlled syn. reluctance motor (SynRM) is discussed. The improvements on the sensorless behaviour are reached by using a high PWM frequency to reduce ripple current in the dc-link. This approach reduces the losses in the capacitors and provides a silent operation of the sensorless method. In order to realize that sensorless control it is necessary to reduce current sensing noise as well and improve the observer behaviour by implementation of a non-linear observer of the mechanical system.
Technical University of Munich, München, Deutschland
Mohamed Abdelrahem received the B.Sc. (with honors) and M.Sc. degrees in electrical engineering from Assiut University, Egypt, in 2007 and 2011, respectively. Since 2014, he has been working toward the Ph.D. degree at the Institute for Electrical Drive Systems and Power Electronics (EAL), Technical University of Munich (TUM), Germany. His research interests include power electronics, predictive and encoderless control of variable-speed wind generators, photovoltaic energy systems, and energy storage systems.
Hochschule Pforzheim, Pforzheim, Deutschland
Oliver Dieterle received the B.Eng. degree in electrical engineering from the Cooperative State University Baden-Württemberg in Stuttgart (Germany) in 2014 and the M.Sc. degree in Embedded Systems from the University of Applied Sciences Pforzheim (Germany) in 2016, where he is currently working as a research assistant. Additionally, he is a PhD student in the cooperative PhD program of the University of Tübingen and the University of Applied Sciences Pforzheim. His research interests include control strategies for electrical multiphase drives.
Technical University of Braunschweig, Braunschweig, Deutschland
Axel Klein received the M. Sc. degree from the Technische Universität Braunschweig, Germany, in 2014. Since then, he has been with the Institut für Regelungstechnik, Technische Universität Braunschweig. His field of research are delta sigma converters used for the control of electrical drives.
Technische Universität Wien, Wien, Österreich
Technische Universität Wien, Wien, Österreich: Mario Nikowitz received the diploma degree in electrical engineering from the University of Technology Vienna in June 2016. His current research and doctoral thesis topic is position sensorless control of synchronous reluctance motors.