National Repository of Grey Literature 48 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
GSM gate for PLC systems
Kadaňka, Karel ; Cipín, Radoslav (referee) ; Knobloch, Jan (advisor)
The master´s thesis describes the initial design of communication module for industrial automation purposes which can transmit short status messages via the GSM network informing about the status of the connected device to a predefined telephone number. In the first part, the communication protocols are describe and a market survey is carried out. Then follows the evaluation of the market survey and the justification of construction of the device. The following chapters are devoted to the description of the device being developed, its individual components and program description and testing prototype.
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.
Problems of measurement and evaluation of transient resistance in electrical engineering
Štěpanovský, Libor ; Cipín, Radoslav (referee) ; Veselka, František (advisor)
The aim of the Bachelor Thesis is to introduce the revisions to electrical wirings and equipment, to get familiarized with the problems of transient resistance and with measurement of transient resistance in electrical engineering. The first part of the Thesis describes various types of revisions, the procedure to carry out revisions and the methodology that must be followed during the revision. The second part is dedicated to transient resistance. It mentions factors which influence the magnitude of transient resistance, methods used to determine the magnitude of transient resistance and a practical demonstration of a transient resistance measurement.
Step down DC/DC converter with high efficiency
Chudý, Andrej ; Cipín, Radoslav (referee) ; Procházka, Petr (advisor)
This bachelor's thesis deals with design and realization of several versions of DC/DC buck converter. The theoretical part of the bachelor's thesis is focused on the general analysis of DC/DC converters with a detailed description of the buck converters. Another part specializes in the analysis of the current state in this field, where the basic differences between the synchronous and diode rectifier are explained, electromagnetic interference and GaN transistors are described. Subsequently, the thesis involves the design and calculations of necessary parameters of the buck converter. Calculations are verified by simulation and subsequent production of the first prototype. The basic measurements are performed on the prototype. Detected deficiencies of the prototype are removed in version 1.0. In order to achieve higher efficiency, innovated version 2.0 and version with GaN transistors are produced. The thesis is finished by comparing created buck converters.
Dynamic Li-ion battery model
Loucký, Vojtěch ; Cipín, Radoslav (referee) ; Toman, Marek (advisor)
The main aim of this work is to compare mathematical models of Li-Ion batteries and for the chosen mathematical model create dynamic model in MATLAB. Different mathematical models are compared based on their weakness. There is detailed description of Improved Thevenin model, which is then created in Simulink and is tested for various discharging currents. This model is adjusted to work with parameters obtained from measuring data on real Li-ion cell and the results from simulations are compared with results from real measurements.
Capacity meter for Li-Ion and NiMH accumulators
Pinďák, Lukáš ; Cipín, Radoslav (referee) ; Huták, Petr (advisor)
The goal of this bachelor thesis is primarily theoretical analysis of battery problems, analysis tester capacity of Li-ion and NiMH accumulators and its subsequent construction. The work consists of three main. The first part deals with the electrochemical current sources and their division, a brief description of their charging and final comparison commonly most used batteries. The second part of the thesis is already focused on the practical design of the capacity meter. In this section is explained the issue of measuring voltage, current and temperature of the battery and determination of their capacity. The last part describes the device software. The proposed devices allow measurement capacity Li-ion and NiMH cells at three different load modes and can be recharged after discharge.
Optimization of magnetic circuit of induction motor for frequency up to 210 Hz
Binek, Martin ; Cipín, Radoslav (referee) ; Vítek, Ondřej (advisor)
This master’s thesis first deals with the theory concerning induction motor. It briefly desbribes the construction of three-phase induction motors, the generation of tractive force, power flow with loss distribution and also torque characteristic. In the next part an analytical calculation of the parameters of equivalent circuit for an existing induction motor with known dimensions is performed. After the calculation it is possible to find out the rated parameters of the motor, which makes it possible to further compare results with the values obtained by other methods. The next step was to create a model of the motor in RMxprt program, which is later also translated to ANSYS Maxwell 2D model. Simulations were carried out in both interfaces. As the next step the results obtained by the three methods are compared with measured values and also evaluated. The final part of the thesis focuses on the optimization of the magnetic circuit for higher frequencies. Efficiency of the modified induction motor is examined for higher frequencies using RMxprt Optimetrics and this procedure is performed for both default and alternative electrical steel materials.
Experimental stand for properties verify of heat pipe in the electric machine shaft
Kučera, Jaroslav ; Cipín, Radoslav (referee) ; Vlach, Radek (advisor)
My bachelor thesis follows my semestral work, which was devoted to the design of the measuring station simulating the cooling of the rotor of the electric machine using a thermal tube in the shaft, and extends it to a practical test, where the measurement verifies the correctness of my design and the proper functioning of all its parts. During the measurement, the software was modified to provide more accurate temperature control in the heated chamber. The basic assumptions have been confirmed. As has been demonstrated during the experiments, greater attention should be paid to the material for the formation of chambers.
Matlab Models of DC/DC Converters
Macík, Tomáš ; Cipín, Radoslav (referee) ; Pazdera, Ivo (advisor)
The Bachelor’s thesis is focused on modeling of DC/DC converters without a transformer using Matlab Simulink software. The first part is dedicated to general explanation of function of selected switch mode power supplies. The second part contains the deduction of equations for every selected switch mode power supply and design of circuit components based on required converter parameters. The models of converters have been created in Matlab Simulink using deduced equations. The models of STEP UP and STEP DOWN converters have been created also using Simscape Power Systems Toolbox and the control of current and voltage has been designed for them.
Thermal calculation of induction motor using thermal networks
Čáp, Martin ; Cipín, Radoslav (referee) ; Toman, Marek (advisor)
This thesis deals with thermal calculation of asynchronous motor. The theoretical part deals with principles of heat transfer, which are important for thermal calculation. Another theoretical part describes asynchronous motor analysis and its loss. In the practical part, these losses together with the electromagnetic circuit are calculated. Subsequently, two thermal networks are created to calculate the warming of individual machine parts. To ensure the correctness of the result, a bound model of partial calculations of the asynchronous machine is created. The next step is to compare the calculated electrical quantities and the calculated temperatures with respect to the measured values.

National Repository of Grey Literature : 48 records found   1 - 10nextend  jump to record:
Interested in being notified about new results for this query?
Subscribe to the RSS feed.