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Sources for electric fence
Surovec, Vojtěch ; Murina, Milan (referee) ; Steinbauer, Miloslav (advisor)
Bachelor’s project is divided to two parts. The First part is focused theoretically and the second part is focused practically. In the theoretically part we met the standartds of properties and application commercially avaible sources as well as of principle pulse (switch-mode) sources and circuit realization. In practically part is suggestion of circuit design and realization of source for electric fence, enebling becked up power 230 VAC / 12 VDC. The source have to contain control circuit for reliable function.
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Optimization of EMI filter Circuitry
Surovec, Vojtěch ; Soldán, Josef (referee) ; Dřínovský, Jiří (advisor)
In introduction of work, I presented the state of the art of measuring insertion loss of the EMI filter and the description of individual methods of measuring is also included. After that I dealt with global optimization methods and some of them I theoretically described. Mainly PSO method was studied carefully, and the principle of optimization in details are presented in the thesis, because this method was used for optimization of the filters parameters in the thesis. Next part of work deals with theoretical and mathematical expression of insertion loss of the EMI filters. Due to the mathematical expression of the insertion loss, the values of parasitic elements of given filter have been optimized in different measuring systems. This optimization was applied on synthetic data. By this step the functionality of optimization was proved and also the fitness function has been tuned and optimised. The last part of thesis works with optimization on measured data of given filters. I found out inaccuracy in mathematical expression of given model of EMI filter, therefore it was necessary to come up with the new filter model. The accuracy increases by using the new filter model. In next step the new model was enlarged by new spurious components.
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Sources for electric fence
Surovec, Vojtěch ; Murina, Milan (referee) ; Steinbauer, Miloslav (advisor)
Bachelor’s project is divided to two parts. The First part is focused theoretically and the second part is focused practically. In the theoretically part we met the standartds of properties and application commercially avaible sources as well as of principle pulse (switch-mode) sources and circuit realization. In practically part is suggestion of circuit design and realization of source for electric fence, enebling becked up power 230 VAC / 12 VDC. The source have to contain control circuit for reliable function.
|
|
|
Optimization of EMI filter Circuitry
Surovec, Vojtěch ; Soldán, Josef (referee) ; Dřínovský, Jiří (advisor)
In introduction of work, I presented the state of the art of measuring insertion loss of the EMI filter and the description of individual methods of measuring is also included. After that I dealt with global optimization methods and some of them I theoretically described. Mainly PSO method was studied carefully, and the principle of optimization in details are presented in the thesis, because this method was used for optimization of the filters parameters in the thesis. Next part of work deals with theoretical and mathematical expression of insertion loss of the EMI filters. Due to the mathematical expression of the insertion loss, the values of parasitic elements of given filter have been optimized in different measuring systems. This optimization was applied on synthetic data. By this step the functionality of optimization was proved and also the fitness function has been tuned and optimised. The last part of thesis works with optimization on measured data of given filters. I found out inaccuracy in mathematical expression of given model of EMI filter, therefore it was necessary to come up with the new filter model. The accuracy increases by using the new filter model. In next step the new model was enlarged by new spurious components.
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