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Precise LED lamps dimming for stage technology
Šojdr, Marek ; Šteffan, Pavel (referee) ; Levek, Vladimír (advisor)
This bachelor´s thesis discusses the problems of dimming of LED bulbs using DC voltage. It explains basic converters topologies and power factor correction options. Part of the thesis deals with the subharmonic oscillation and possibilities of its elimination. Describes the design of the circuitry of dimmer module for precise dimming of selected types of LED bulbs, revival and testing of the dimmer module. Part of the work is basic for realization of the dimmer (printed circuit board, list of components).
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Design of audio power amplifier with Bluetooth connectivity
Bartoň, Jan ; Šotner, Roman (referee) ; Brančík, Lubomír (advisor)
This bachelor‘s thesis deals with the task of designing an audio amplifier, operating in class D, with a nominal output power of 2 x 80 W with Bluetooth connectivity, supplemented by an equalizer and a state display. A power supply and a user interface are designed as well. At first, research regarding audio amplifiers is made, followed by a more thorough description of class D operating principles. Afterwards the actual synthesis of the desired amplifier is presented, followed by the power supply design procedure. The correctness of the synthesis is later verified by simulations in PSpice and LTSpice. Theoretical design is then practically built, and its parameters are confronted with expected values by measurements.
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High effective switched power supply
Rástočný, Martin ; Kledrowetz, Vilém (referee) ; Pavlík, Michal (advisor)
This bachelor’s thesis analyses theoretical basis of switched mode power supplies. Selections of right topology for implementation, design of power and control circuits are discussed. The thesis also contains a brief summary of switched mode power supplies. Subsequently it focuses on calculations and selection of appropriate power components. A result of the thesis lies in development and practical design of switched mode power supply and its optimization for high effectivity of conversion. To achieve these theoretical calculations of parameters for chosen topology were made.
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Power audio amplifier with AC/DC converter
Melša, Vojtěch ; Kováč, Michal (referee) ; Kubíček, Michal (advisor)
The aim of this work was to design and construct a simple audio amplifier, which would be based of involvement and components used in switching power sources on the maximum degree (for example from usual ATX sources for computer). The main motivation for development is the existence of many old sources that do not use and big interest of users for the construction of home audio amplifiers for small and medium power. Amplifiers based on switching power sources with greater efficiency and less weight than comparable classic amplifiers (working in classes A, B or AB). Their disadvantage is the complicated design and introduction of distortion and spurious signals to the amplified signal. This work will be described a design of simple amplifier, which will minimize these negative effects. For shortcomings and wrong parameters this proposed involvement will be eventually described and implemented design of amplifier in class D.
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Power supply for space application
Hrubý, Lukáš ; Bohrn, Marek (referee) ; Pavlík, Michal (advisor)
The following work deals with a design of switched mode power supply. In this essay, there is detailed description of non-isolated and isolated topologies of SMPS, used in industry. Next, there are calculations for design and analysis which are needed for space design. There will also be selected devices, which could be used in final device. Based on experience and ECSS requirements, there will be chosen parameters of SMPS, which could be then used as a module for future space design. Chosen topology of SMPS will be created as engineering model assembled with commercial components. One part of this work is dedicated to design and realization of planar transformer and coupled inductor.
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Laboraty Pulse Power Supply Using Output Linear Stabilization
Lednický, Marek ; Dušek, Martin (referee) ; Šebesta, Jiří (advisor)
This thesis deals with switched mode power supplies. The theoretic part of the thesis consists of historical development and the elementary schemes of switched mode power supplies. It also includes the comparing with linear regulators. Next, it contains the description of individuals parts switched mode power supplies as a rectifiers, power supplies and stabilizers. There is a proposal and fixing of laboratory pulse power supply using output linear stabilization in the practical part of the paper.
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Switching power supply with zero voltage switching
Pešl, Jiří ; Pavlík, Michal (referee) ; Boušek, Jaroslav (advisor)
Diploma thesis describes the design of an switched mode power supply with switching at zero voltage for driving the anode of Anode-layer type ion source. First aim of thesis is ion sources and specialy Anode-layer type of ion source in detail. Main aim of thesis are important aspects of the design of switching mode power supply, which comes later the detailed construction of an switched mode power supply with output voltage 2800 V at output power 2800 W.
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General-purpose power supply with microcontroller
Jorda, Ivo ; Vyskočil, Pavel (referee) ; Brančík, Lubomír (advisor)
The aim of this thesis is design of adjustable switched mode power supply with symmetrical output of 25 V, and switched mode power supply with fixed output voltage of 5 V. Required maximum output current of each outputs is 3 A. At the beginning of the paper function of the basic SMPS topologies is described. Next all reqiured SMPSs are designed and chosen parts of the design are simulated. In the second half of the thesis assembly and testing of PCB are described as well as functions of programs. Last chapter contains results of meassurement of power supply paramters.
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Switched power supply testbench
Zatloukal, Tomáš ; Bohrn, Marek (referee) ; Pavlík, Michal (advisor)
The following work deals with a design of power supply testbench with design of their replaceable modules and circuits for their measurement. The final product should be used for faster design and tuning of switching power supplies. In this essay, there is detailed description of switching power supplies, analysis of support circuits and calculations for design. Based on theoretical background and selected parameters, a connection concept will be created. This concept will be validated by a device that will consist of main board, changeable modules and measurement circuits.
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Laboraty Pulse Power Supply Using Output Linear Stabilization
Lednický, Marek ; Dušek, Martin (referee) ; Šebesta, Jiří (advisor)
This thesis deals with switched mode power supplies. The theoretic part of the thesis consists of historical development and the elementary schemes of switched mode power supplies. It also includes the comparing with linear regulators. Next, it contains the description of individuals parts switched mode power supplies as a rectifiers, power supplies and stabilizers. There is a proposal and fixing of laboratory pulse power supply using output linear stabilization in the practical part of the paper.
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