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Power_electronics Features

GaN-based switcher ICs empower next-generation power products - issue 1/2020
There have been a number of disruptive advances in the power electronics community over the last 20 years....
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Linear voltage regulators operate at automotive temperatures
Designed for high reliability, high temperature applications, the CMT-Antares is Cissoid's latest regulator.
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Power Electronics Europe Events
 
PCIM Europe 2020 postponed until 28.07 - 30.07.2020
February 25, 2020 - July 31, 2020

After a slowdown of the power electronics market in 2019 an increase of around ten percent is expected in the running year, mainly caused by e-mobility. Thus PCIM Europe 2020 takes place in a favorable econonic environment.

Half-day seminars

Already on the Sunday afternoon Seminars will be given. Jacques Laeuffer from French Dtalents will educate the attendees on “Basics for Electromagnetic Compatibility (EMC) of Power Electronics”. Fast semiconductors commutations are required for efficiency of high frequency power converters and drives, together with wide bandwidth of their control electronics. But sudden front edges generate perturbations in control circuits, and on utility power networks. Seminar shows and calculates step by step how perturbations propagate, as Differential Mode (DM) and Common Mode (CM), how to reduce noisy oscillations from the beginning, how to design and implement on PCB robust control electronics, how to calculate and optimize DM and CM filters for EMC standards compliance, how to avoid expensive shielding and improve reliability. Number of practical designs are analytically calculated, and showing numbers for a wide range of powers and frequencies.

EPC (USA) will talk with three speakers (Alex Lidow, Michael de Rooij, John Glaser) on their “2020 Vision for Maximizing GaN FET and IC Performance”. GaN power semiconductors have seen increased adoption in many power electronic applications. The performance of GaN FETs continues to evolve and improve and so do the challenges of maximizing their benefits. This tutorial provides engineers the tools and understanding needed to fully utilize the potential of GaN FETs and emerging GaN integrated circuits and teaches how to maximize those advantages.

Seminar 3 on May 3 entitled “Ceramic Capacitors: Characterization and Use as Control Elements” is given by Shmuel Ben-Yaakov, Ben-Gurion University (Israel). Ceramic capacitors are widely used in electronic design and are essential in power electronics systems. Despite the widespread use of these elements, many of their intrinsic parameters are poorly understood or even known. Following an introduction on ferroelectricity and basic parameters of ferroelectric ceramic capacitors, the seminar unveils yet unrecognized features of ceramic capacitors while the control application section focuses on the voltage dependent capacitor’s ability to change the resonant frequency of resonant networks and help to better tune WPT systems.

Seminar 4 by Ionel Dan Jitaru, Rompower (USA) covers the “Latest Trends in Magnetic Technologies for High Efficiency and High Power Density”. There was a significant progress in semiconductor technology in the last twenty years which pushed the power conversion efficiency from low to middle 80% to low to middle 90% over the last twenty years. During the same time period the progress in magnetic technology was practically negligible. We all were waiting for a “miracle” new core material which will allow us to make the next jump. Though not much publicized, in magnetic technology there were many new technologies but these technologies did capture just fragments of the market due their proprietary nature. Some of these new ideas are in public domain these days but many of the engineers were not exposed to them. The goal of the seminar is to bring some light into the modern magnetic technologies and to teach the engineers how to rethink the magnetic design for high efficiency and high power density.

Full-day tutorials

On the Monday (May 4) four full-day Tutorials are offered. Again Ionel Dan Jitaru from Rompower will educate attendees about “A Novel Soft Switching Technology which can Convert any Hard Switching PWM Topology into a True Soft Switching Topology”. The goal of this tutorial is to present a new soft switching technology which can be applied to any of the classical hard switching topology and converting them to a “true soft switching” topology. In “true soft switching” technology, the primary switching devices turn on at zero voltage and the secondary switching devices turn off at zero current. There is no ringing or spikes across any of the switching devices in primary or secondary. The new technology uses a self-adjusting current injection solution which ensure that all the switching elements in the secondary turn off at zero current and all the primary switching turn on at zero voltage. Using the methodology familiar topologies such as flyback, boost, two-transistor forward, half bridge and conventional full bridge into “a true soft topology” can be converted. This technology can be also applied to more traditional soft switching technologies such as acti ve clamp forward, asymmetrical half bridge and phase shifted full bridge topology and improve their performances an ensure that the soft switching occurs under any input-output operating conditions. These new soft switching technologies offer an avenue to increase the efficiency and power density in power converters.

Tutorial 2 is entitled “Demystifying GaN HEMT: From Theory to Practice” and will be held by Miroslav Vasic, University of Madrid (Spain) and Shmuel Ben-Yaakov, Ben-Gurion University.The tutorial covers the two fundamental aspects of modern GaN devices: device theory, and practical design issues. The theoretical section discusses and clarifies the characteristics and fundamental advantages of wide bandgap devices over traditional Si devices, while the application section covers the engineering issues that must be tackled when a GaN based design is performed. The morning session covers the device-material aspects, comparison to, and benefit over, Si devices, as well as a multitude of design examples that implement GaN devices. The afternoon session is engineering oriented and discussed practical issue that need to be considered and tackled in industrial designs that include GaN devices - demonstrated by circuit designs and experimental results.

Tutorial 3 “A New Design Approach for EMC and Faster Power Electronics” complements the mentioned Seminar 1.

Tutorial 4, given by Christian Peter Dick and Jens Onno Krah, both from Cologne University of Applied Sciences (Germany) will talk on “High Performance Control of Power Converters”.

Utilizing power electronic based converter technology is a key approach to build energy efficient solutions. Due to the innovation cycles of the semiconductor suppliers the size and the cost of the more and more complex inverter systems is not increasing. However, especially new and fast switching wide bandgap devices (SiC & GaN) are challenging the control hardware. The advanced control architectures are covered by discussing algorithms and possible implementations using µC, DSP and FPGA technology. Robust controller designs with well-defined set up procedures or reliable self-tuning algorithms can help to use these innovations utilizing a reasonable set-up time.

Four keynotes on three days

After the official opening and award ceremony for the young engineers and best paper on the Tuesday morning, May 5, Ahmed Elasser, GE Global Research Center (USA), will give the first keynote on “Battery Energy Storage Systems: Past, Present and Future”. In this talk, the speaker will draw on his extensive experience as a key member of the GE Global Research Center Renewable Reservoir team that worked for three years (2017-2019) to conceive, design, prototype, and productize the GE 4 MWh Li-Ion Battery Energy Storage System (BESS) dubbed the Renewable Reservoir. In addition to being a key member of the power electronics team that extensively tested the various power conversion components, the speaker worked closely with the co-located GE Energy Storage Team on the testing of the prototype 1 MWh energy storage boxes, and on the commissioning and energization of a 12 MVA test bed for testing the 4 MWh energy storage boxes. The speaker also worked with GE Solar to design, commission, and energize a solar PV array that is used to charge the batteries. In this talk the speaker will talk about the history of BESS systems from a research and industrial perspective, address the present situation of AC and DC coupled BESS. In particular DC coupled BESS that enables solar and storage integration will be discussed from a practical point of view. Topics like architecture type, dc/dc converters topologies, short circuit testing, integration with solar arrays using dc/dc optimizers, as well as overall safety, reliability, economical benefits, cost, and deployment will also be addressed. Other topics such as container requirements, battery technology, digital tools, unit controller, and grid requirements will also be discussed. Finally, the speaker will address the challenges facing BESS and the various hurdles to its extensive deployment and adoption by utilities and commercial customers. The challenges at the battery, power conversion, and grid level will be highlighted.

On the Wednesday two keynotes are scheduled - “Electric Cars” by Robert Plikat, who will introduce Audi’s first electric drive train, and “The Future of Work”. The latter, given by Hanne Caspersen, Senior Innovation Advisor and Speaker at TRENDONE (Germany), will deal with trends of future work. Digital devices now enable us to work from anywhere in the world, access information everywhere and at all times. The education sector also benefits from the new possibilities offered by this form of knowledge transfer. Game-like applications are already teaching nursery school children the basics of programming,while students attend their lectures virtually and adults take part in further training courses at online universities. Besides hyper-specialization and the transfer of artificial intelligence to the world of knowledge work, highly individual work styles will also influence the world of work in the future. For companies, both knowledge of and about their employees will become a competitive factor. Who works when and how well, what kind of teams make most sense and how many new employees do we need – these questions will not be answered by a mere gut feeling in future, but by way of strategic data analysis.

The fourth keynote by Roland Hümpfner, Huawei Technologies (Germany) on the Thursday morning is entitled “Innovative Data Centers Power Infrastructure Solutions”. Driven by Digitalization the demand for Data Centers will increase significantly in the next few years. The power demand of information and communication technology will grow substantially into the double digit percentage range. High availability Data Centers have a sophisticated power and cooling infrastructure substantially supported by power electronics. Looking into the historical evolution, considering the state of the art and have an outlook in to potential future solutions. Power Usage Effectiveness (PUE) is a traditional measure to evaluate energy efficiency, integration of renewable and providing grid services, sustainability and eco design will be in the future more and more interesting.AS

https://pcim.mesago.com/nuernberg/en.html

 

 

 
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