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Design and Implementation of Active Loudspeaker System with Digital Input
Uchytil, Filip ; Balík, Miroslav (referee) ; Schimmel, Jiří (advisor)
The work is focused on a design of an active loudspeaker system with a bi-amp amplifier and a digital input. There is described the theory of a loudspeaker enclosure design and its practical implementation. Furthermore the work deals with a design and construction of input circuits such as a preamplifier, Baxandall tone control, active crossover, all-pass filter and S/PDIF. On the basis of the amplifier´s theory the optimal construction of amplifiers and their design are selected. The complex design of the loudspeaker box is devised so that it would reach a maximum acoustic power during the preservation of a low distortion.
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Design efective power speed controller for 3-phase motor
Uchytil, Filip ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
This paper deals with the regulation of revolution of the asynchronous three phase engine with the frequency transformer. Firstly we will look into individual types of engines, the ways of regulation of the engines, the measuring of contemporary voltage and current at the engine and programming the ATMEGA64 microprocessor. The supervision is beeing handled by the PWM signal, which ensures low consumption of our circuit. The outputting part is comprised by the MOSFET transistors. The thesis devotes to communication of the ATMEGA64 processor via the USB port. The transmission ratio, voltage and even the contemporary current is displayed on the LCD monitor. The outcome of this thesis is the effective regulation of the asynchronous three phase engine, with the possibility of tracking all of the parameters mentioned above which are shown on the LCD display.
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Design efective power speed controller for 3-phase motor
Uchytil, Filip ; Hanák, Pavel (referee) ; Lattenberg, Ivo (advisor)
This paper deals with the regulation of revolution of the asynchronous three phase engine with the frequency transformer. Firstly we will look into individual types of engines, the ways of regulation of the engines, the measuring of contemporary voltage and current at the engine and programming the ATMEGA64 microprocessor. The supervision is beeing handled by the PWM signal, which ensures low consumption of our circuit. The outputting part is comprised by the MOSFET transistors. The thesis devotes to communication of the ATMEGA64 processor via the USB port. The transmission ratio, voltage and even the contemporary current is displayed on the LCD monitor. The outcome of this thesis is the effective regulation of the asynchronous three phase engine, with the possibility of tracking all of the parameters mentioned above which are shown on the LCD display.
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|
|
Design and Implementation of Active Loudspeaker System with Digital Input
Uchytil, Filip ; Balík, Miroslav (referee) ; Schimmel, Jiří (advisor)
The work is focused on a design of an active loudspeaker system with a bi-amp amplifier and a digital input. There is described the theory of a loudspeaker enclosure design and its practical implementation. Furthermore the work deals with a design and construction of input circuits such as a preamplifier, Baxandall tone control, active crossover, all-pass filter and S/PDIF. On the basis of the amplifier´s theory the optimal construction of amplifiers and their design are selected. The complex design of the loudspeaker box is devised so that it would reach a maximum acoustic power during the preservation of a low distortion.
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