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Energetic problems of induction electroheat equipments
Milka, Jiří ; Paar, Martin (referee) ; Lázničková, Ilona (advisor)
Induction heating is mostly used for melting metal materials in metallurgy. The principle of induction heating comes from electromagnetic induction which generates eddy currents heating the charge in electrically conducting material. The first part of the bachelor thesis is devoted to the principle of induction heating. Further, there are possibilities of applying the induction heating in electro heat devices mentioned. As the paper is focused on energy problems appearing when getting connected to the grid, the second part of the paper contains explanation – both theoretical and on examples - of compensation and symmetrization of induction electro heat devices.
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Machine Tool Spindle Units: Active Tool Deflection Compensation
Zarboch, Jaromír ; Vetiška, Jan (referee) ; Březina, Tomáš (advisor)
Cutting forces during milling process cause tool deflection. There are several methods for compensation of this deflection. This paper is focused on the active method of tool deflection compensation which angles adaptronic spindle by piezoactuators to compensate the tool deflection. For this method the simulation model was built in programe Matlab / Simulink. The effectiveness of this model was validated by search simulations.
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Proposals Of Effective Motivation Program In a Selected Company
Hrbáčková, Kristýna ; Skočík, Lukáš (referee) ; Konečný, Štěpán (advisor)
This thesis deals with the current incentive system in society and the subsequent proposal for its improvement. In the theoretical part, I will explain the basic concepts of employee motivation and will focus on the characteristics of different types of motivational means. In the practical part I will introduce T Machinery a. S and I will also deal with the analysis of the motivation system. To get information from employees, I used a questionnaire survey. On the basis of the analysis I will develop proposals that will increase the satisfaction of the employees.
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Legal Regulation of Expropriation from the Investor's and Expert's Perspective
Tesařová, Zdeňka ; Superatová, Alena (referee) ; Hanák, Jakub (advisor)
The thesis deals with the institution of expropriation and explanation of basic terms. Subsequently is explained the enactment of the institution of expropriation focusing the role of the investor and the expert. Expert sets according to the expertise report the amount of compensation for expropriation and expenses connected with it. It also specifies the participation and tasks of the investor, who enters the expropriation. The aim of this thesis is to take into account questionable aspects of participation of the investor and the expert in the expropriation proceedings and to adumbrate their possible solutions.
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The Proposal on Implementation the Motivation System in the Company
Dedíková, Diana ; Samek, David (referee) ; Novák, Petr (advisor)
This thesis deals with an issue of creating an incentive system in a company Stavlux invest, s. r. o. It mainly deals with themes of rewarding staff and what benefits the company will provide its employees. Ideas of the employees and the company director about employee benefits were detected by an interview with the manager and by using a survey (questionnaire). You can find a suggestion how to introduce/implement benefits or more precisely comprehensive program of motivation for employees which should lead to increasing satisfaction and work efficiency of employees and their greater motivation in the performance of work orders.
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The Optical Fibre Dispersion Effects on Multiplex Transmission Systems
Kyselák, Martin ; Filka, Miloslav (advisor)
This doctoral thesis deals with present trend to turn up the bit rate of the optical fibres making use of wavelenght multiplex systems. There are new theoretical and practical problems caused by the new technologies. Except the known modal dispersion there exist problems caused by chromatical and polarization mode dispersion. In the opening of the thesis the known effects, which influence the payload signal, are introduced. The polarization mode dispersion has the main attention. Within the scope of this thesis there has been programmed the statistical calculator which can analyses the measured values of differential group delay by Monte Carlo calculation. Next meaningful output is the designating application of the optical routes. It is possible to mathematicaly unambiguously define the polarization mode dispersion by Jones, Stokes and Poynting vectors. This complicated calculations are mechanized and in the simulation application make possible to simulate the signification of the PMD influence at different input parameters. The thesis includes the study of the PMD modulation format impact with the results of simulations and confrontation with other scientists results. The significant output are the final practical results examinations, which can be implemented thanks to the possibility of using the FTB-5500B measuring device.
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Proposal of the Motivation System in the Company
Vejnarová, Michaela ; Moravcová, Jana (referee) ; Novák, Petr (advisor)
This diploma thesis focuses on the analysis and improvement of company Zebra Technologies CZ s.r.o. First part of thesis is devoted to theoretical concepts related to this topic. In second analytical part, the company is introduced, analysis of motivation program and evaluation program of the company is carried out. Last part is focused on proposed measures to improve the company’s motivation system based on the results from analysis part of thesis.
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Power engineering issues of electrothermal devices
Popelář, Vojtěch ; Radil, Lukáš (referee) ; Lázničková, Ilona (advisor)
Electric furnaces are one of the largest consumers of elektricity. They have a large negative impact on the electricity grid. Therefore, it is necessary to optimize their work process. The thesis deals with energetic problems of high power electric furnaces. The first part provides a theoretical overview of types of electric furnaces, their types, properties and possibility of connecting to the electricity grid. For this work were selected resistance furnaces, induction furnaces and arc furnaces. The second part analyzes the problem of correcting power factor cos and the problem of unbalanced electricity consumption. For both these problems are given the possibilities for removing or reducing the negative characteristics of these phenomena. At the end of this section is an example of compensating equipment design and symmetrizating device design for selected types of electric furnaces.
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