Trifazni SiC-razsmernik za sinhronski stroj s permanentnimi magneti

ZUPIN, MATEVŽ (author), Zajec, Peter (mentor)

V pričujočem delu je prikazan razvoj namenskega razsmernika za vodenje trifaznega sinhronega motorja v električnih vozilih. Cilj tega projekta je bil izdelati razsmernik, ki bi ga lahko uporabljali za pogon motorjev v dirkalniku na tekmovanjih Formula Student. V uvodnih poglavjih je prikazana primerjava med učinkovitostmi različnih tehnologij preklopnih elementov in izbira najprimernejše za naše potrebe. Delo zajema razvoj močnostne stopnje razsmernika z uporabo diskretnih tranzistorjev iz silicijevega karbida (SiC), in pripadajočega krmilnega vezja, ki pa temelji na uporabi odprtokodnega projekta VESC. Krmiljenje uporablja metodo vodenja motorja z orientacijo polja (ang. field oriented control – FOC), ki temelji na merjenju vseh treh faznih tokov in kota motorja preko resolverja. Podrobneje je predstavljena problematika uporabe učinkovitejših tranzistorjev na osnovi silicijevega karbida. Izboljšana revizija močnostnega in krmilnega tiskanega vezja demonstrira zanesljivo delovanje razsmernika, ki poganja obremenjen motor nameščen na preizkusno stojalo z zavoro.

• Language: Slovenian
• Keywords: Razsmernik, sinhron motor s permanentnimi magneti, električna vozila, pogonski sistem, SiC, FOC
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2023
• PID: 20.500.12556/RUL-149505
• COBISS.SI-ID: 165448963
• Publication date in RUL: 07.09.2023

Secondary language

• Language: English
• Title: Three-phase SiC-inverter for permanent magnet synchronous machine

Abstract

In the following work, a development of 3-phase inverter for driving a permanent magnet synchronous motor is presented. The goal of this project was to develop an inverter which could be used in the traction system of our race car for the Formula Student competition. First a comparison between efficiencies of different switching element technologies is presented together with selection of the best one for our use case. This document covers development of the power stage circuit with the use of silicon carbide (SiC) switching devices, together with its dedicated control circuit which is based on opensource project VESC. Control algorithm of this project is using Field Oriented Control (FOC) to spin the motor, which requires precise reading of all three phase currents and angle of the motor with the use of resolver. Presented is facing with the problems of using high efficiency fast switching transistors of the new SiC technology. Through multiple iterations of power stage and control printed circuit boards, a reliable working of the inverter is achieved when driving loaded motor on a testbench.

• Keywords: Inverter, Permanent magnet synchronous motor (PMSM), electric vehicle, traction system, SiC, FOC