EMC research at the University of Twente. Prof.dr.ir. Frank Leferink Chair EMC
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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 day/week, other: THALES) Frits Buesink (3 days/week) Projects: 2 researchers obtained their PhD IOP-EMVT : EMI and power drive systems), Anne Roc h, promotie 12 oktober 2012 IOP-EMVT: Power Quality & EMC, Roelof Timens, promotie 8 november 2013, Electromagnetic Interference of Equipment in Power Supply Networks Currently: 7 PhD projects (1 vacancy) 1 Postdoc Visiting researchers: Fatou Diouf (France), Ahmed Wefky (Spain), Aizan Ubin (Malaysia) 3
4 EMC University of Twente, 2 Current projects THALES: Lightning w.r.t. composite structures, Alex Blaj, thesis in finalization phase, now Hitec, UPS systems IOP-EMVT: Embedded Passives, Olga Tereshchenko, started writing thesis FP7 EU: High Intensity Radiated Fields, Robert Vogt-Ardatjew Maritime Innovation, Bart van Leersum KP7 EU: Protection of Civil Infrastruct. against EM Attack, Stefan van de Beek Moderne gebruikers en opwekkers van elektrische energie in de slimme stad, Cees Keyer KP7 EU: Improved EMC Test Methods in Industrial Environments, Postdoc: Roelof Timens + Frits Buesink NWO Smart Grid: EMI in multi-level converters, vacancy 4
5 Assistentie NL industrie/samenleving Kleine bedrijven die PV installaties bouwen Personen die problemen hebben met smart meters 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. Kennismarkt, 23 mei
6 Power Electronics Many good results, best paper awards Chapter in an ebook (2012) Journal paper (2012) Defended thesis 12 October
7 PDS, conducted emission Requirements for high-tech systems Civil requirements 7
8 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] 8
9 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] 8 6 Status: 8 Nov 2013 defence Voltage (V) EMC=incl. PQ Time (seconds) x
![Damage in windmill generator due to PLT Voltage (V) 300 200 100 0-100 -200-300 -400 Time (s) Vhf[PE-N] 8 6](/docs-images/40/1356068/images/page_9.jpg "Status: 8 Nov 2013 defence Voltage (V) 4 2 0-2 EMC=incl. PQ. -4-6 -8-2.5-2 -1.5-1 -0.5 0 0.5 1 1.5 2 2.")
10 UT, effects of lightning Nice results Example: Patent bearing Now thesis writing with pre-loading without pre-loading 10 10
11 Embedded Materials New materials to reduce EMI EBG for reducing PDN (power distribution noise) signal integrity & EMI: 11 11
12 UT, HIRF-SE High-Intensity Radiated Fields, Synthetic Environment (HIRF-SE) Develop simulation techniques for EM fields in reflecting environments Jan Dec Received Voltage [dbuv] s stirring, pk 1s stirring, RMS 1s stirring, Av Frequency [MHz] 12 12
![2015 105 100 Received Voltage [dbuv] 95 90 85 80 1s stirring, pk 1s stirring, RMS 1s](/docs-images/40/1356068/images/page_12.jpg "stirring, Av 75 1100 1110 1120 1130 1140 1150 1160 1170 1180 1190 1200 Frequency [MHz]")
13 UT, Maritieme Innovation Concept of de mast is de kast for the whole ship Period: 1 jan dec 2015 Large, complex, high-tech system 13 13
14 UT, Structures Strategies for the Improvement of Critical Infrastructure Resilience to Electromagnetic attacks 1 July Aug
15 UT, EMRP JRP-i10: Improved EMC Test Methods in Industrial Environments, from laboratory to industrial environment 1 July July 2017 WP1: Conducted emission WP2: Conducted immunity/susceptibility WP3: Radiated emission WP4: Radiated immunity/susceptibility WP5: EMC reference devices for round-robin tests WP6: Impact 15 15
16 UT, Smart Grid EMI in multi-level converters for Smart Grid 16 16
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