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Načrtovanje, izdelava in testiranje zaščite za pogon sinhronskega stroja s trajnimi magneti
ID PERŠIČ, ŽAN (Author), ID Nemec, Mitja (Mentor) More about this mentor... This link opens in a new window

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Abstract
V tem delu je opisan koncept izolacijskega vezja, ki ob nepredvidenem nevarnem dogodku varno izolira krmilnik od stroja in ga tudi ustavi. Cilj naloge je bila študija pojavov, ki so s tem povezani, ter na koncu izdelava prototipnega vezja, ki potrdi teoretične napovedi in simulacije. Ideja je, da se pri krmilniku najprej odklopi vse tri faze, ki ga povezujejo s strojem, nato pa se še stroj kratkostiči in tako zagotovi varno ustavitev. Naloga se je izvedla v dveh delih. Najprej smo idejo potrdili v simulacijskem programu LTspice, kjer smo se poskušali v omejenem času in v mejah zmožnosti programa, čim bolj približati realnim pogojem. Koncept se je že v simulacijah pokazal za izvedljiv, treba je bilo le poskrbeti za dovolj natančno časovno uskladitev odklopnih signalov. Nadaljevali smo z izdelavo tiskanega vezja. Nato smo z meritvami na testnem stroju in krmilniku potrdili, da za dane pogoje vezje deluje in varno odklopi. Na koncu ovrednotimo zahteve ter podamo še ideje za popravke in nadgradnje koncepta ali vezja.

Language:Slovenian
Keywords:Zaščitno vezje, sinhronski stroj s trajnimi magneti, PMSM, krmilnik, MOSFET, prenapetost, preklopi, kratek stik
Work type:Master's thesis/paper
Organization:FE - Faculty of Electrical Engineering
Year:2019
PID:20.500.12556/RUL-111312 This link opens in a new window
Publication date in RUL:27.09.2019
Views:946
Downloads:217
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Secondary language

Language:English
Title:Design, construction and testing of protection circuit for permanent magnet synchronous drive
Abstract:
In this thesis we describe the concept of protection circuit, that safely isolates inverter from the machine. The purpose was simulation of such circuit, design of a prototype and test measurements. The idea is to safely disconnect all motor phases from inverter, and also make a three phase short circuit to stop the machine rotation. We confirm this with simulations in LTspice, where we also test the limits of the concept. After designing the prototype we confirm the importance of the delay between the moment of breaking the phase connection and performing short circuit, on the over-voltage generated by breaking current connection. In the end we confirm the operation of the circuit with measurement results and suggest possible corrections and improvements of the concept or prototype.

Keywords:Protection circuit, permanent magnet synchronous machine, PMSM, controller, MOSFET, over-voltage, switching, short circuit

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