20.500.12556/RUL-141445 Varnostno stikalo dvosmernega presmernika po standardu LV148 LV148 compliant safety switch for bidirectional DC/DC converter Pričujoče magistrsko delo podaja teoretično podlago, zasnovo, izdelavo in testiranje visoko tokovnega varnostnega stikala za avtomobilski dvosmerni stikalni presmernik. Zasnova stikala sledi smernicam 48 V napetostnega standarda in ostalim avtomobilskim aplikacijam prilagojenim zahtevam, ki se uporabljajo v vozilih z omejeno elektrifikacijo pogonskega sklopa, t. i. mehkih hibridih. Podrobneje je opisan in prikazan način sklopitve varnostnega stikala in dvosmernega pretvornika ter izbrani topologiji pripadajoče zahteve. Posamezni sklopi stikala so namenoma sestavljeni iz pretežno diskretnih komponent zaradi trenutnega stanja na trgu električnih komponent. Posebna pozornost je bila posvečena zasnovi nadtokovne zaščite, ki ščiti dvosmerni stikalni pretvornik pred kratkim stikom. Ob shemah vezij izdelanih v programu Altium Designer je predstavljeno delovanje posameznih sklopov. Sledi razlaga delovanja celotnega varnostnega stikala. Testiranje in overitev izdelanega prototipa sta pokazala, da stikalo izpolnjuje osnovne zahteve, ugotovljene pa so bile določene pomanjkljivosti. V zaključku se dotaknemo še možnih izboljšav, ki bi izpopolnile delovanje stikala. This master’s thesis provides theoretical basis, design, manufacturing, and testing of high-current safety switch for an automotive bidirectional switching converter. The design of the switch follows the guidelines of the 48 V automotive standard and other specific requirements applied to vehicles with limited powertrain electrification, i.e. mild hybrids. The coupling method of the safety switch and bidirectional converter is described in more detail along with topology specific requirements. Individual safety switch assemblies are intentionally composed of predominantly discrete components due to the current electrical component shortage. Special attention was paid to the design of the overcurrent protection, which protects the bidirectional switching converter from short circuit. Operation of individual assemblies is presented alongside circuit schematics created with Altium Designer. Operation of safety switch is presented and explained. Testing and verification of the manufactured prototype determined that the switch meets basic requirements, but certain shortcomings were identified. In conclusion, improvements are described that would enhance the operation of the switch. varnostno stikalo DC odklopnik LV148 Safety switch DC disconnector LV148 true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2022-09-29 11:50:00 2022-09-29 11:50:08 2022-10-06 14:04:59 0000-00-00 00:00:00 2022 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 61092 124547075 Ursic_Jan_-_Varnostno_stikalo_dvosmernega_presmernika_po_standardu_LV148.pdf Ursic_Jan_-_Varnostno_stikalo_dvosmernega_presmernika_po_standardu_LV148.pdf 1 C5EB78557245B5324DF7DDCE5D468255 41231e0c472f95054b953329c59dcc70d24c9858d2c984cbd84cb549a363c66d 181248f5-3fdc-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=162504 Fakulteta za elektrotehniko 0 0 0