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ZVS/ZCS converter for induction heating
Gadas, Jan ; Šotner, Roman (referee) ; Theumer, Radek (advisor)
The bachelor thesis deals with the design of high-frequency inverters with low-loss switching applied as an induction heater. Four known inverter topologies are presented in the thesis. The aim of the thesis is to select a suitable topology on which the induction heating will be implemented according to the theoretical knowledge found and subsequent simulations. The result of the semester thesis is a functional low-power model of an induction heater implemented on a PCB. The result of the bachelor thesis is high-power model of an induction heater for industrial use. Functionality tests and comparison of measured data with simulations are performed for both. For industrial induction heater, a melting test was performed with analysis of element content on spectrum analyzers to demonstrate use.
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Audio amplifier with PWM for laboratory measurements
Lelek, Martin ; Dřínovský, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
This paper describes about theoretical design of class D power amplifier. Amplifier is primarily intended for laboratory measurements, i.e. measuring of major parameters of amplifier operates in this class (frequency response, slew rate, aliasing etc.). Amplifier (oncoming laboratory module) uses PWM (Pulse Width Modulation) and is constructed from separate blocks for possibility of measuring key signals trough all the structure (triangle comparation wave, analog input signal, feedback signal, PWM signal from modulator, drivers and power transistors, output signal after recontruction filters). Laboratory module is determined for laboratory power supply of safe voltage and should be produce power of several tens of watts into usual load impedance.
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Design of switching-mode regulated power supply
Zelinková, Lenka ; Kováč,, Michal (referee) ; Brančík, Lubomír (advisor)
The thesis addresses the conceptual design and implementation of the switched-mode power supply having the adjustable dc voltage output up to 25V and current output up to 15A. The half-bridge topology is used for this supply. Design features and quantities are simulated in PSpice and Micro-Cap simulation tools. The thesis covers the simulation results, assembly data and the results measured on the implemented functional sample.
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Audio amplifier with PWM for laboratory measurements
Lelek, Martin ; Dřínovský, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
This paper describes about theoretical design of class D power amplifier. Amplifier is primarily intended for laboratory measurements, i.e. measuring of major parameters of amplifier operates in this class (frequency response, slew rate, aliasing etc.). Amplifier (oncoming laboratory module) uses PWM (Pulse Width Modulation) and is constructed from separate blocks for possibility of measuring key signals trough all the structure (triangle comparation wave, analog input signal, feedback signal, PWM signal from modulator, drivers and power transistors, output signal after recontruction filters). Laboratory module is determined for laboratory power supply of safe voltage and should be produce power of several tens of watts into usual load impedance.
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Design of switching-mode regulated power supply
Zelinková, Lenka ; Kováč,, Michal (referee) ; Brančík, Lubomír (advisor)
The thesis addresses the conceptual design and implementation of the switched-mode power supply having the adjustable dc voltage output up to 25V and current output up to 15A. The half-bridge topology is used for this supply. Design features and quantities are simulated in PSpice and Micro-Cap simulation tools. The thesis covers the simulation results, assembly data and the results measured on the implemented functional sample.
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