Top academic lectures
Get to know the latest research of your university.
Top industry insights
Get to know Infineon Austria - one of the leading industrial companies in Austria.
Recreation & fun
Enjoy the wonderful landscape with lakes and mountains in Villach and have fun.
Extend your network
Get to know smart & wonderful people - students, lecturers, and employees of Infineon Austria.
Earn a Certificate
The certificate will be helpful for job applications. Regarding credits please contact your professors.
The participation at the WinterSchool is free of charge. Additionally Infineon Austria covers your accommodation costs in Villach. Travel costs are not included.
- Arrival to Villach and lunch at 1pm
- 2pm WinterSchool Welcome
- Overview applications and market trends
- Basics of power electronics
- Overview & basics of devices and technologies for power electronics
- Basics of gate drivers
- Meet & greet with Infineon experts
- Single-inductors multiple outputs (SIMO) DC-DC converters - Edoardo Bonizzoni from the University of Pavia A wide range of battery-operated portable applications, such as digital cameras, cellular phones, and medical diagnosis systems among many others demands for more and more efficient power management systems. In this area, DC-DC converters play a key role in keeping long the battery life while still providing a stable supply voltage together with the required driving capability to the load. In case of need of multiple supply voltages for different functional blocks within the same IC, an approach that became very popular in the last decade is the use of single inductor multiple output (SIMO) DC-DC converters. After a brief overview on the conventional single inductor single output (SISO) buck and boost schemes and on their key features, in this talk the challenges for designing a SIMO will be discussed: the need of an inductor time sharing technique and the required driving strategy for power transistors on the load side. The description of few design examples implemented in CMOS technologies will complete and conclude the talk.
- Switched-capacitor (SC) DC-DC converters - Piero Malcovati from the University of Pavia Switched-capacitor DC-DC converters represent a promising alternative to conventional inductor based topologies. They basically exploit capacitors and switches to convert one DC voltage to another and, therefore, they do not require any magnetic component, thus enabling the possibility of a fully-integrated implementation. Switched-capacitor DC-DC converters are intrinsically more effective in the utilization of switches and passive elements than their inductive counterparts. In the first part of the lecture, the basic theory of switched-capacitor DC-DC converters is analyzed, deriving the basic analytical expressions for the most important design parameter, such as conversion ratio, output impedance, efficiency, and discussing the most important non-idealities. Then, the state-of-the-art of switched-capacitor DC-DC converters implemented either with external or integrated capacitors is reviewed. Finally, a few actual examples are considered in detail, illustrating the most important design aspects and tricks, as well as the achieved performance.
- SMPS system solutions with digital control - Tobias Reimann from the Technical University Ilmenau with two PhD´s In the part of Marko Scherf focus is on the philosophy of the hardware design of two PFC reference design boards. Both are characterized by high optimization levels regarding power density and efficiency. After a comparison of the accomplished converter topologies, the determination of main components, operation modes and internal parameters is shown. While the power semiconductors and control ICs have to be selected properly, the inductive components can be tailor-made. The design approaches for the PFC inductors are pointed out. A special mechanical concept is required due to the high power density demands, keeping track of the EMI behavior. Furthermore, the implementation of the auxiliary supply, control and drive circuitry is shown. Finally, measurement results (efficiency, waveforms, spectral) for verification are presented.
Uwe Frank will present the requirements and the applied software concept for digital PFC (DPFC) of the developed reference design boards. Design and implementation of Software methods and functional program blocks necessary for DPFC are explained. The usage of an Infineon 32-bit XMC-family ARM® Cortex®-M0 industrial microcontroller provides an efficient means for digital power control. Its architecture and valuable features for DPFC are shown.Based on the classic approach with output-voltage and input-current control loops, enhanced methods have proven to increase the static and dynamic performance of the designed demonstration boards. Measurement results demonstrate how the performance targets are met by help of the digital concept.
- SiC MOSFET motor application - Luca Solero from the University of Rome 3
The lecture gives an overview of the advantages and disadvantages of the use of SiC devices in motor drives applications. Initially, a general overview of the electric drives is provided together with the analytical expressions of the power losses related to the semiconductor devices. Then, the strategies proposed in literature to improve the efficiency are briefly described and the advantages of using SiC devices are discussed. The negative effects of the dynamic characteristics of very fast switches are depicted and the overvoltages which occur at the terminals of electric motors and are related to the high dv/dt values are analyzed. The second part of the lecture is focused on the modeling of cables and electric motors at high frequency and the required measures to obtain the parameters of the equivalent circuits. A case study is then discussed and the actual measurements, taken with an impedance analyzer, are used to build the model of both the cable and the electric motor.
- Fire side chat
- Hands on day:
- Presentation of PhD and Master theses as well as opportunities for students at Infineon
- Lab tours
- Market place with demonstrations
- Social activity with dinner (departure: 4.30 pm @ Infineon)
- On-Board Electric Vehicle Charging: Topologies and Control for High-Efficiency High Power Density - Roberto Petrella from the University of Udine Electric vehicle (EV) and plug-in hybrid electric vehicle (PHEV) technologies are becoming increasingly popular nowadays, as demonstrated by the numerous vehicles recently made available in the market by almost all automakers. Main energy storage system of EV/PHEV are electrochemical batteries, whose capacity is the limiting factor of vehicle range autonomy. Charging time and battery life are linked to the technology and capacity of the battery itself and to the characteristics of the charger. It has to be efficient and reliable, with high power density, low cost, and low volume and weight. It must ensure that the utility current is drawn with low distortion and at high power factor, in order to be compliant with power quality issues and to maximize the real power available from a utility outlet. Battery chargers play therefore a critical role in the development of electric mobility. The lecture aims at providing some insights into high-efficiency and high power density conversion solutions for on-board electric vehicle battery charging. The adopted power conversion structures and topologies, together with control strategies, components and manufacturing technologies will be presented and discussed, aiming at highlighting the impact of the different aspects on the performance of the charger.
- Motor control & trends in integration - Hubert Berger from the University of Applied Sciences Joanneum coming soon
- Presentation Technikum Vienna - Felix Himmelstoß from the University of Applied Sciences Technikum Vienna DC/DC converters transform one /or more input DC voltage/s into one /or more output voltage/s. They are needed as power supplies for lighting devices, chargers, charge pumps, to power electronic circuits, and to drive motors and actuators. In this lecture some selected applications in medicine, data transmission, actuators, and lighting are presented. The problems concerning the design are pointed out and some nonconventional converter topologies are discussed. These are converters with limited duty cycles, modified converts, combined forward-flyback converters, quadratic converters, and converters with coupled coils. In a second part the analysis of a converter is explained for a fourth order converter. The voltage transformation rate, the relationship of the currents, and the stress of the devices are derived. Constructing the idealized curves of the voltages across and of the currents through the devices helps to get a clear comprehension of the circuit and gives valuable hints for the dimensioning.
- Low power motor drives and optimization - Klaus Krischan from the Technical University Graz With increased awareness of energy consumption and related phenomenons, such as CO2 emissions and global warming, energy efficiency moved into the focus of legislative, manufacturers and consumers. Even for low power products, energy efficiency and grid compatibility gained broad interest, as their numbers are increasing steadily. Moving from drives, operated from the mains directly, resulting in virtually constant speed, optionally controlled in an on/off regime, to continuous variable speed operation, by introducing power electronic circuits, provided the first step in efficiency enhancement. The next step is to reduce the losses in every single component, such as the driven mechanical process itself, the electric machine as well as the power electronics, needed for supplying the electric machine. Remembering the very general definition of efficiency, the presentation introduces the relevant specifications of the low power drive and moves over to loss computation and comparison for a standard topology. The main contributions to the overall losses are pointed out and some possibilities for increasing the efficiency are introduced and discussed. Additional circuitry is introduced and its contribution to the overall losses is illuminated. General thoughts on increasing efficiency for low power applications are highlighted.
- Leisure time
- Multi-objective optimization in power electronics - Johann Walter Kolar from the ETH Zurich The development of power electronics converters is driven by increasing demands on power density and efficiency as well as lower relative costs. Conventional single-objective optimizations are targeting only single performance indices, i.e. are ignoring the actual mutual coupling and/or necessary trade-offs between different performance figures. Accordingly, a multi-objective optimization approach, which allows to comprehensively explore the influence of all design parameters and to calculate the absolute performance limit in a multi-dimensional performance space is required to ensure the full utilization of a set of base technologies. The lecture will first discuss the translation of power electronics converter design and evaluation into a mapping of a design space into a performance space, explain the meaning of the Pareto surface and design space diversity and propose a specific combination of performances for characterizing the technology node of power electronics. Next, a comprehensive comparative evaluation of three-level and five-level dual active bridge DC/DC converters based on the Pareto front will be shown. Furthermore, the use of multi-objective optimization for analyzing the performance improvement of a non-isolated single-phase DC/AC converter built for the GOOGLE Little Box Challenge will be detailed, which also reveals an interesting design space diversity. In addition, results of an efficiency/power density/costs optimization of three-phase Si and SiC photovoltaics inverter topologies will be summarized, highlighting that only a system-level and life-cycle cost analysis allows to identify and quantify the advantages of SiC over Si power semiconductor technology. In the concluding part of the talk, the S-curve of modern power electronics technology will be extrapolated, key topics of future research in the area of component and converter modeling and optimization will be highlighted, and the expected convergence of power electronics simulations and measurements as well as the expected future decoupling of the design and manufacturing of highly integrated power electronics converters, i.e. the transition to "fabless" power electronics manufacturing will be discussed. Finally, an extension of the considerations of single converter systems to converter clusters and power supply chains will be proposed in combination with a new set of corresponding performance indices in order to provide a basis for a future system-oriented consideration of power electronics converters.
- Feedback & takeaways
- WinterSchool Goodbye