Darko Vračar received the Dipl.-Ing, Magister, and Ph.D. degrees in electrical engineering from the School of Electrical Engineering, University of Belgrade, Belgrade, Serbia, in 2000, 2007, and 2023, respectively. His major ﬁeld of study was power converters and drives.
He is also with BRUSA Elektronik (München) GmbH, Munich, Germany. He has 22 years of industrial experience. Areas of expertise are implementation of telecom and datacenter power supplies, and R&D of power electronics’ systems, such as solar inverters, SMPS for industrial, automotive, and telecom applications. He has published several papers related to power converters and drives and holds one patent in power conversion systems. His research interests include simulation, control, and design of power converters. In addition, he was delivering training sessions related to power electronics’ topics or industrial standards.
Mr. Vračar is a member of the following IEEE Societies: Industry Applications, Industrial Electronics, and Power Electronics. He is a Reviewer of journal Electronics.
Development of Power Electronics Hardware in Industrial and Automotive Environments
Abstract – Power electronics plays significant role in many modern applications like: home
appliances, consumer electronics, industry, transportation and automotive, power
generation, transmission and distribution. Independent of converter size, complexity
and power level, the development process is more or less similar.
This tutorial will provide an overview and address challenges in development process
of low-voltage power converters, i.e. input/output voltages are less than 1 kV ac and
1.5 kV dc. The process starts with the concept phase then goes through first
prototypes till approvals phase and release for the mass production. In addition,
some aspects of customer support will be covered as well.
The intended audience is students, academic staff, and practicing engineers that are
not familiar will development process of power electronics hardware for the mass
production. Typically academic staff and researchers are focused on the first 20% of
the total work needed to bring a product to the market. Hence, objective here is to get
a basic understanding about each phase in the development process. Tutorial is
planned as half a day tutorial or to last around 3 hours plus Q&A session.
Regina Ramos (Member, IEEE) received a B.Sc. degree in electrical engineering, an M.Sc. degree in industrial electronics, and a Ph.D. degree in electrical and electronic engineering from the Universidad Politecnica de Madrid (UPM), Madrid, Spain, in 2014, 2016, and 2021, respectively. She is a Teaching Assistant with UPM. Currently, a great part of her research activities is related to high-frequency switching-mode power supplies, power architectures, and digital control applied to power electronics. She has been involved in Power Electronics since 2012, participating in R&D projects in the industry. She is the author or co-author of 15 papers published in IEEE conferences and journals.
Overview of Wireless Power Transfer Systems and Their Control and Application in implantable medical devices
Abstract – In this tutorial, the complete process of the analysis and design of a wireless power transfer (WPT) system based on inductive coupling will be carried out including the topology and control stage. This tutorial aims to review the main solutions presented in the state of the art pointing out its main advantages and drawbacks. A methodology to design inductive power systems will be presented.
Regarding the design process, different alternatives will be presented to minimize the effect of gap variation on the overall system efficiency. Once, the different topologies are presented, the control of the complete system will be tackled during this tutorial, pointing out different alternatives to use a single-stage solution avoiding an extra stage to regulate the output port or a pre-regulator.
A case study of implantable medical devices will be used to illustrate all the points mentioned during the tutorial.
In the last years, emerging electromagnetic technologies have been proposed as novel solutions for diagnosing and treating brain-related diseases. Recent studies have shown that low-intensity electric fields, also known as Tumor Treating Fields (TTF), inhibit cancerous cell growth. Implantable devices seem to be a promising solution to improve the effectiveness of the therapy reducing the social stigma for patients, if these devices are power wireless it directly impacts the number of surgical interventions to replace the battery and therefore reduces the risk of infections.
Keywords: Wireless power transfer, implantable device, brain disease treatment, tumor treating field, digital control, tumor treating fields.
Alecksey Anuchin (Senior Member, IEEE) received the B.Sc., M.Sc., Ph.D., and Dr.Eng.Sc. degrees from Moscow Power Engineering Institute, Moscow, Russia, in 1999, 2001, 2004, and 2018, respectively.
He is the Chair of Joint Chapter IE13/PE31/PEL35/IA34, Moscow, from 2021 to 2023. He is in a head position at the Department of Electric Drives, Moscow Power Engineering Institute for the last ten years. He has more than 25 years of experience covering control systems of electric drives, hybrid powertrains, and real-time communications. He is the author of three textbooks on the design of real-time software for the microcontroller of the C28 family and Cortex-M4F, and control system of electric drives, in Russian. He has published more than 150 conference papers and journal articles. He delivers lectures on “Control Systems of Electric Drives,” “Real-time Software Design,” “Electric Drives,” and “Science Research Writing” in Moscow Power Engineering Institute.
Modern Methods for Precise Speed Measurement in Electric Drives
Incremental position encoders are widely used in industrial electric drives for both position and speed measurement. The encoder provides information about position only, and the speed can be evaluated by differentiating position in time.
The tutorial is based on the experience of developing the control system for high-performance spindle drive of a milling machine. It starts with an overview of the existing methods of speed measurement with accuracy analysis and estimation of implementation complexity. The inaccuracies of encoders will be considered together with their impact to the speed measurement methods. The precise method for high speeds will be introduced and the method of encoder calibration for low-speed measurement will be considered. All the considered methods will be supported by experimental verification.
The tutorial can be useful for students, academic staff, and practicing engineers as it provides on the shelf solution to the speed measurement with the maximum accuracy and ease of practical implementation.
The tutorial is planned for 1.5 hours plus Q&A session.
What is incremental position encoder?
Simple methods of speed measurement
Demands to the speed measurement system of high-performance electric drives
Inaccuracies of the incremental encoder
Review of the speed measurement methods and accuracy analysis
Processing signals of incremental encoder as delta-sigma modulated ones for measurement of at high speeds
Calibrating incremental encoder for speed measurement at low speeds
Computation complexity of the methods for implementation using modern microcontroller