Usporedba 2D i 3D proračuna metodom konačnih elemenata pri određivanju performanci sinkronih motora s permanentnim magnetima

master's thesis

• Title (english): Comparison of 2D and 3D finite element calculations in determining the performance of synchronous permanent magnet motors
• Author: Ivan Mikulić
• Mentor: Stjepan Stipetić (mentor)
• Committee member: Stjepan Stipetić (predsjednik povjerenstva)
• Committee member: Damir Žarko (član povjerenstva)
• Committee member: Zlatko Hanić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2022-02-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U ovom diplomskom radu napravljen je kratak pregled glavnih uzroka gubitaka u električnom motoru i napravljena je usporedba gubitaka u 2D i 3D simulaciji. 3D simulacija je potrebna, jer s 2D simulacijom nije moguće uočiti utjecaj 3D efekata poput aksijalnog rasipanja toka, aksijalne segmentacije magneta, skošenja rotora itd., i to je rezultiralo smanjenjem momenta i povećanjem faznog napona u odnosu na 2D simulaciju. Usporedba je napravljena i za gubitke u statoru, rotoru i magnetima. Gubici su modelirani još detaljnije koristeći PWM oblik strujnog signala, koji su povećali gubitke zbog dodatnih harmonika. Na kraju, izgrađen je 2D model za simulaciju AC gubitaka. Model je napravljen u Motor-CADu i JMAGu i napravljena je usporedba dobivenih rezultata. Pokazalo se da Motor-CAD ima relativno veliku razliku u odnosu na JMAG, zbog pretpostavke da svi vodiči imaju jednaku raspodjelu struje, što nije slučaj u stvarnosti.

Abstract (english)

In this thesis, a short overview of motor losses and their comparison in 2D and 3D simulations is performed. However, 2D simulation cannot predict the 3D effects, such as axial flux leakage, magnet segmentation, rotor skew, etc. It resulted in torque reduction and increased phase voltage compared to 3D simulation. The comparison is also made for stator, rotor, and magnet losses. Then the losses were modeled in more detail using the PWM current signal, which increased the losses due to the additional harmonics in the current waveform. In the end, the 2D model was built to simulate AC losses. These were compared in two different FEM solvers, Motor-CAD and JMAG. It was shown that assumptions made by the Motor-CAD solver are introducing a significant error in AC loss value compared to results obtained from JMAG.

• Keywords: 3D efekti; aksijalno rasipanje polja u čeonom prostoru; gubici u magnetima; 3D simulacija
• Keywords (english): 3D effects; end-region axial flux leakage; magnet losses; 3D simulation
• Language: english
• URN:NBN: urn:nbn:hr:168:821041
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-13 13:10:08