|
| |
|
| |
|
|
Model of electric vehicle in SIMULINK/SIMSCAPE program
Kachlík, Jan ; Klíma, Bohumil (referee) ; Huzlík, Rostislav (advisor)
The topic of this diploma thesis is mathematical model of electric vehicle. The traction drive consists of Li-Ion battery, free-phase DC/AC converter and permanent magnet synchronous machine. The main goal of the thesis is development of function model and making simulations in SIMULINK/SIMSCAPE program. Work is divided into three main parts. The first part is dedicated to the theoretical description of the main drive components. The second part describes partial subsystems of the model. In the last part is build a complete model of electric vehicle and simulated different driving mode.
|
|
|
Utilization of MERS in heavy current engineering
Vetiška, Vojtěch ; Procházka, Petr (referee) ; Huzlík, Rostislav (advisor)
This graduation thesis is aimed in usage of MERS circuits in high-current electroengineering. The MERS circuit is a serial variable capacitor which capacity is possible to change by the help of switching of semiconductor components. On beginning of the thesis I shall acquaint you with usage of the MERS circuit. It will be sketched out their basic circuitry, the operating method, possibilities of transistors switching and calculation of the capacity capacitors for particular controlling method. On the prepared device we shall accomplish the predefined measurement. Furthermore we shall create the simulation by means of the Matlab programme. In the end we shall compare the results of the simulation with measured values.
|
|
|
Dynamic simulation of DC motor using FEM
Gottwald, Michal ; Huzlík, Rostislav (referee) ; Vítek, Ondřej (advisor)
My diploma thesis deals with a specific dynamic model of DC motor with the parameters obtained from the calculation and from the program using the finite element method. It shows how much accurate results can be achieved in the model, if you use only the values which can be measured, recorded and calculated on the engine. This thesis contens three parts. First part describes the structure and function of DC motor and the basic principle and the use of FEM. Next is calculation analytical and numerical parameters. The search parameters include torque, resistance and inductance of armature winding, resistance and inductance of excitation windings. The last part is dedicated to creating a dynamic model. Results from the dynamic model and measured values are compared in the conclusion of my thesis.
|
|
|
Measurement and analysis of single-phase transformer
Princ, Pavel ; Huzlík, Rostislav (referee) ; Vítek, Ondřej (advisor)
The aim of that diploma thesis is low power transformer simulation via its substitutitional circuitry.As Instrument for matematical description of model and simulation of various operating situations with different amplitude and types of load was used Labview software. The software was simultaneously used for real transformer measurement and to compare these results with calculated values. The created program is also applied for measuring excercise for students. In The thesis is described measured transformer in terms of final elements method in FEMM software and there is showed the procedure of its design.
|
|
|
Program for calculation of ventilation and heating in synchronous machine
Kolář, Pavel ; Ondrůšek, Čestmír (referee) ; Huzlík, Rostislav (advisor)
This master´s thesis deals with ventilation of synchronous generators with a cylindrical rotor. For the design of ventilation we apply basic physical laws in the field of hydromechanics and thermomechanics. Therefore the first chapters are devoted to these subjects. They are followed by the description of ventilation systems and a thermal net is created and solved for one of them consisting of the thermal resistance and sources. The final part deals with a program, which I developed in Visual Basic 2008 Express Edition. This program enables to calculate the ventilation and heating of individual parts of the machine after entering basic machine dimensions and losses.
|
|
|
Automated measurement of transient phenomena of synchronous generators
Hvězda, Jindřich ; Huzlík, Rostislav (referee) ; Vítek, Ondřej (advisor)
My master´s thesis named “Automated measurement of transient phenomena of synchronous generators“ deals with transient phenomena appearing during a three-phase short-circuit on output clips of synchronous generators. Introduction of my master´s thesis named “Theory of transient phenomena of synchronous generators” deals with a theoretic description of transient phenomena appearing during a three-phase short-circuit on output clips of synchronous generators. This part treats the existence of direct and alternating components of short-circuit currents flowing in stator winding during a three-phase short circuit. Afterwards it treats reactances of stator windidng for the duration of a three-phase short-circuit on clips of synchronous generators. Theme of the following part of the master´s thesis is “Technical setting of measuring system for analysis of transient phenomena of synchronous generators”. This part deals with an analysis of technical setting that characterizes measuring sensors. These sensors scan measured electrical magnitudes that describe transient phenomena. Measuring hardware by a firm National Instruments is designed on the basis of technical setting. Following part of the master´s thesis named “Measuring hardware for measuring of transient phenomena of synchronous generators as a platform PXI/SCXI” deals with a description of technical characteristics of designed measuring hardware for measuring transient phenomena. Practical part of the master´s thesis named “Software TransientVIEW for analysis of transient phenomena of synchronous generators” describes in detail a software conception of user interface of software TransientVIEW that is developed in a developing interface LabVIEW 8.6 by the firm National Instruments. Afterwards it treats implemented user functions that allows exact and effective work with analysis of transient phenomena of synchronous generators.
|
|
|
System engineering innovation with patent search
Mrkvan, Pavel ; Huzlík, Rostislav (referee) ; Bušov, Bohuslav (advisor)
The diploma thesis deals with engineering system innovation using TRIZ methodology. This methodology uses algorithmic approach to problem solving and divides innovation into two parts, the analysis and synthesis part. The analytical part consists of steps to help find the problem and its essence, by contrast, offers a part of synthetic procedures to deal with them. The general aim is the utilization of steps and procedures contained in the analysis and synthesis part of the TRIZ methodology to a specific engineering system innovation.
|
|
|
The electronic commutation motor
Bláha, Martin ; Huzlík, Rostislav (referee) ; Melichar, Petr (advisor)
This work discusses about nowadays problematic of the electronic comutation motors.This work also describes the opportunity of electronic control of these motors. The result of this work is realization of electronic control circuit from discreet components. There also are mentioned is proposal of electronic control board from SMD components. This control board include temperature control with ventilator switching , commutation logic, PWM speed control. In the last part of this paper are results of evaluation measurements of EC motor.
|
guest ::
