EMC research at the University of Twente
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1 EMC research at the University of Twente Prof.dr.ir. Frank Leferink Chair EMC 1
2 First: Studies: Interference via power supply onboard naval vessels Shielding of composite structures Coupling between antennas onboard naval vessels Etc. Programs: Many, many radars to many countries New: Integrated mast (civil / MIL: CE101, CE102, CS101, so 30Hz-..MHz). Challenges (related to conducted EMI)» Many CE marked SMPS resonating: +30dB» Transients power lines coupled into ethernet» Filters with a lot of mutual parasitics: at 100MHz -100dB NSxx: new rotating active phased array radar SMART-L ELR: 1344 transmit-receive elements, many power interfaces, mast is kast principle 2
3 EMC University of Twente, 1 Frank Leferink (1~2 day/week, other: THALES) Frits Buesink (3 days/week, other: retired) Alex Blaj: Lightning and composite structures, PhD defense 2015 Olga Tereshchenko: Embedded materials for reduced EMI, defense 2015 Robert Vogt: HIRF project, 2016 Stefan van de Beek: I-EMI, Structures, 2016 Bart van Leersum: EMC for Maritime Innovation, 2016 Cees Keijer: Modern equipment EMC for Smart Cities, 2017 Niek Moonen: EMC for Multi-Level converters in Smart Grids, 2018 Dwi Mandaris: EMC Measurements, 2018 Former members dr. Anne Roc h (PhD 2012) dr. Roelof Timens (PhD 2013) Visiting researchers: Fatou Diouf-2 (PhD 2014, France), Ahmed Wefky (PhD 2013, Spain), Aizan Ubin (Malaysia), and via Marie Curie Ramiro Serra and Fatou Diouf-1 and many students 3
4 Assistentie NL industrie/samenleving Kleine bedrijven die PV installaties bouwen Bedrijven met EMI problemen in o.a. PCB en installatie Windmolens die op hol slaan door power line telecommunication (PLT) (toonfrequent) Procesbuis met RF verwarming voor voedselindustrie Gemeenten adviseren over antennebeleid Gemeente adviseren over C2000 Media: EMF, C2000, PQ Etc.etc.etc. 4
5 Power Electronics Many good results, best paper awards Chapter in an ebook (2012) Journal paper (2012) Defended thesis 12 October
6 PDS, conducted emission Requirements for high-tech systems Civil requirements 6
7 PDS, radiated emission Electric field strength [dbmv/m] Requirements for high-tech systems unshielded cable shielded cable + dv/dt + CMC+C Civil require ments Frequency [MHz] 7
8 UT, PQ&EMC Power Quality & EMC Develop models to predict interaction between modern electronic 400 equipment connected via the mains supply Cases: Carre building, high THD PV and PDS farm PV causing overvoltage Damage in windmill generator due to PLT Voltage (V) Time (s) Vhf[PE-N] Voltage (V) Time (seconds) x
9 UT, effects of lightning Nice results Example: Patent bearing Now thesis writing with pre-loading without pre-loading 9 9
10 Embedded Materials New materials to reduce EMI EBG for reducing PDN (power distribution noise) signal integrity & EMI: Noise voltage, dbµv plane line two single-cell EBG EBG with different cell sizes Frequency,MHz 10 10
11 UT, HIRF-SE High-Intensity Radiated Fields, Synthetic Environment (HIRF-SE) Develop simulation techniques for EM fields in reflecting environments April Received Voltage [dbuv] s stirring, pk 1s stirring, RMS 1s stirring, Av Frequency [MHz] 11 11
12 UT, Maritime Innovation Concept of de mast is de kast for the whole ship Period: 1 jan dec 2015 Large, complex, high-tech system 12 12
13 UT, Structures Strategies for the Improvement of Critical Infrastructure Resilience to Electromagnetic attacks 1 July Aug
14 UT, EMRP JRP-i10: Improved EMC Test Methods in Industrial Environments, from laboratory to industrial environment 1 July July 2016 WP1: Conducted emission WP2: Conducted immunity/susceptibility WP3: Radiated emission WP4: Radiated immunity/susceptibility WP5: EMC reference devices for round-robin tests WP6: Impact 14 14
15 UT, Smart Grid EMI in multi-level converters for Smart Grid 1 Jan Dec
16 UT, Measurements Broadband Microstrip Patch Array Antenna for the Application of Electromagnetic Compatibility 1 Jan Dec 2018 Funded by Ministry of Research and Technology, Indonesia 16 16
17 Trends Spring 2015, IEEE EMC Magazine, invited paper titled: Conducted interference, challenges and interference cases Example 1: number of articles in IEEE Tr. on Power Electronics and IEEE Tr. on Industrial Electronics with EMC or EMI in the title: Example 2: Japanese Agentschap Telecom complaint database Number of articles Year
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