Nadzorno vezje za avtomatizirano močnostno cikliranje

JEJČIČ, TILEN (author), Puhan, Janez (mentor)

Magistrska naloga opisuje izdelavo vezja, ki omogoča nadzor nad avtomatiziranim postopkom testiranja, ki ga imenujemo močnostno cikliranje. To se izvaja na močnostnih pretvornikih oziroma krmilnikih, ki so uporabljeni za krmiljenje sinhronskih in asinhronskih motorjev. V prvem delu naloge je predstavljen trenutni testni postopek in testno okolje, na katerem se ta izvaja. Ugotovimo, da se pojavi potreba po nadzornem vezju, saj si želimo, da bi bilo testno okolje čim bolj univerzalno in primerno za različne tipe krmilnikov. Drugi del naloge opisuje izdelavo vezja, ki ga v osnovi sestavljajo trije izhodi. Dva sta uporabljena za nadzor nad vhodnimi in izhodnimi priključki testnega primerka, zadnji pa za krmiljenje hladilnega sistema oziroma za nadzor pretoka hladilnih medijev. Sledi opis programske opreme, ki se nahaja na vgrajenem mikrokrmilniku. Ta je zasnovana na avtomatu stanj, ki omogoča, da se procesi izvajajo v pravilnem in varnem zaporedju. Ker moramo imeti do nadzornega vezja dostop prek osebnega računalnika, smo za komunikacijsko povezavo izbrali vodilo CAN. Uporabljeni protokol za urejanje in prenos sporočil je nastavek za protokol CANopen, ki je pogosto uporabljen v različnih aplikacijah za avtomatizacijo procesov. Izdelan je tudi programski modul, ki nadzorni aplikaciji na osebnem računalniku omogoča vključitev in uporabo vezja v testnem okolju. Zadnji del naloge opisuje rezultate meritev in zaključke o različnih možnostih uporabe nadzornega vezja.

• Language: Slovenian
• Keywords: nadzorno vezje, močnostno cikliranje, vodilo CAN
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2019
• PID: 20.500.12556/RUL-107907
• Publication date in RUL: 04.06.2019

Secondary language

• Language: English
• Title: Control circuit for automated power cycling tests

Abstract

The thesis describes the development of a circuit that enables the control over the automated testing procedure called power cycling. The test procedure is executed on power converters a.k.a. controllers that are used to control synchronous and asynchronous motors. In the first part of the thesis, we describe current test procedures and test environment for power cycling tests. We realize the need for a control circuit as we wish the test environment to be as universal as possible and therefore suitable for different types of controllers. The second part of the thesis describes circuit development procedure. The circuit consists of three outputs, two are used to control the input and output connections of the test specimen; the third one is used to control the cooling system, or better formulated to control the flow of the coolant. A description of the software follows. It runs on the built-in microcontroller and is built as a state machine that allows processes to be performed in the correct and safe order. PC access to the control circuit is established by the CAN bus. The CANopen protocol was chosen as an additional protocol layer enabling editing and transmitting messages, which is frequently used in various process automation applications. Program module for the main control application which runs on the PC has also been developed. It can be included in the main application and used to control the test environment. The last part delivers test results and conclusions about different usage possibilities of the control circuit.

• Keywords: control circuit, power cycling, CAN bus