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Losses in induction machines supplied by a frequency converter
Lípa, Miroslav ; Vítek, Ondřej (referee) ; Bárta, Jan (advisor)
Diplomová práce se zabývá měřením asynchronního motoru se dvěma různými zdroji napájení, a to s frekvenčním měničem a generátorem. Tyto dva zdroje napájení byly následně simulovány pomocí metody konečných prvků a porovnány. První kapitola se zabývá popisem asynchronního stroje napájeného frekvenčním měničem a také doporučenými úpravami pro tento druh napájení, aby se předešlo co nejvíce nežádoucím jevům. Druhá kapitola se věnuje ztrátám asynchronního stroje. Třetí kapitola popisuje přístup k měření a vyhodnocování harmonických ztrát způsobených napájením z měniče a také standardizovaný přístup podle mezinárodních norem. Druhá polovina třetí kapitoly také popisuje výpočetní analýzu, která je v této práci použita ve formě analýzy konečných prvků. Nakonec jsou popsány nejistoty měření při použití standardní metody vstup-výstup. Ve čtvrté kapitole je představeno modelování v softwaru ANSYS MAXWELL, kde je nejprve popsána tvorba modelu specifikovaného stroje, poté jeho simulace se sinusovým napájením, a v druhé polovině je vysvětlena simulace s PWM napájením a jak bylo PWM replikováno pomocí naměřených průběhů. V páté kapitole jsou prezentovány všechny výsledky měření s vyhodnocením. Na konci kapitoly je uvedeno srovnání simulace a měření a jeho nedostatečná přesnost.
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Back-to-back inverter for motors and generators
Wich, Petr ; Ctibor, Jiří (referee) ; Knobloch, Jan (advisor)
The aim of this thesis was to design and implement a back-to-back converter. It is an indirect frequency converter with a DC intermediate circuit and an active rectifier. First of all design procedure of the individual components is described with the calculation of their operating parameters. Next, the interconnection of the components and the assembly of the inverter including a virtual model is described. Subsequently, a mathematical model of the inverter was created and the control algorithm was tested on it. In the next part, the correctness of analogue value sensing by the control electronics was verified. Finally, test measurements were carried out to verify the operating parameters of the inverter, including verification of the power sizing.
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Design of special purpose tool for sag measurement
Mejzlík, Jiří ; Vetiška, Jan (referee) ; Houška, Pavel (advisor)
The aim of the thesis is to design a special purpose tool for sag measurement. Three possible solutions are proposed, for each the production cycle time is calculated and its approximate costs are estimated. The best solution in terms of a trade-off between both key quantities is suggested. Next part of the work deals with the selection of suitable drives for the manipulator as well as of the other components for the whole electrical device. Finally, a possible automated control of the complete machinery, including the electrical wiring diagram, is presented.
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Experimental workplace of controlled drive with high dynamics
Rozkošný, Miroslav ; Marada, Tomáš (referee) ; Němec, Zdeněk (advisor)
My diploma thesis deals with the basic principle of the frequency inverter and his construnction. In the next section are analyze the basic properties and characteristics of the using equipment. The main part of this thesis is to investigate the dynamic properties of asynchronous electric motor controlled by a frequency inverter using STARTER. The results of experiments are compared and analyzed.
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Control modernization of two-axis manipulator
Mejzlík, Jiří ; Vetiška, Jan (referee) ; Houška, Pavel (advisor)
The bachelor thesis addresses the modernization of two-axis manipulator that is a part of the galvanizing line. The introductory section describes and evaluates the current situation and specifies the requirements for the device modernization. The selection of the proposed control is based on the analysis of possible solutions which are described in this work. The next part deals with the selection of suitable components and describes the process of implementation.
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Remote training station
Kučera, Tomáš ; Jirgl, Miroslav (referee) ; Štohl, Radek (advisor)
The purpose of the thesis is design and contruction of remote training station for training with Schneider Electric products. Its purpose is to introduce company PLCs, familirize user with configuring variable speed drives and servo drives and prezenting Machine Advisor and EcoStruxure Augmented Operator Advisor online servives The begining is dedicated to introduction to company and a range of its products in the field of industrial automation. In second chapter, I select components for building training station. Third chapter is dedicated to assembly of station. In fourth chaper I describe programing of individual elements and example.
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Dedicated machine for forming of jerrican spouts
Podolan, Luděk ; Ing.Pavel Cícha, Evropský polytechnický institut, Kunovice (referee) ; Novák, Vítězslav (advisor)
The aim of this diploma thesis is detail description of theory, design process and final realization of single-purpose machine for pressing canister funnels. Theoretical section of this work covers manufacturing standards of the electrical cabinets, options for the single-purpose machine control with focus on the programmable logic controller e.g. PLC, PLC control program concept with definition of the main alarm states and description of two types of electrical cabinet. Practical part contains description of the electrical cabinet, its block diagram, photo documentation of the wiring (chapter 4.), chosen PLC type, its advantages and detail program description using Ladder diagram notation, communication with operator realized with touch LCD panel, programming environment for this LCD panel and program realization process. Finalized machine description and its photo documentation in manufacturing process is covered in the end. This diploma thesis is based and extends previously successfully defended semester project.
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Stroke mechanism of bridge crane
Drábík, Michal ; Sedláček, Martin (referee) ; Škopán, Miroslav (advisor)
This bachelor thesis is focused on the design stroke mechanism of bridge crane with load capacity of 10 000kg. The thesis contains a critical research of today-manufactured crane trolleys and a selection of a suitable conception. Part of the design are calculations of the lifting mechanism base parts, for example: rope diameter, pulleys diameters, complete dimensions of the rope drum, selection and the design of the electric motor, gearbox, brake, frequency inverter, gear and drum coupling. Last chapter is focused on the strength calculation of the rope drum, durability of the bearing, weld strength examination and radial load. Part of the thesis is the lifting mechanism assembly drawing documentations and the rope drum welding assembly.
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Garage door drive with idnuction machine
Lažek, Tomáš ; Cipín, Radoslav (referee) ; Pazdera, Ivo (advisor)
This thesis deals with a design of an electrical drive for a sliding side door. Goal of the thesis is to design of a frequency converter for an asynchronous motor with a gearbox. In the first part, the power supply for the freqency converter is solved in form of a single phase rectifier. Power section is solved by an integrated module IKC10H60GA manofactured by Infineon. The control board is provided with circuits for communication between the processor and the power section. Auxiliary power supply is designed as a fly - back converter. The drive of the converter is realized by STM32 Nucleo - 64 board. The design of the converter and drive algorithm are described in detail.
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