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Abstract(s)
Nesta dissertação foi desenvolvido um conversor ressonante LC série com um transformador, composto por um primário e quatro secundários independentes para alimentação dos circuitos de comando (drivers) dos estágios de um gerador de Marx, que se encontram a potenciais elevados. Este conversor foi simulado e ensaiado experimentalmente.
A frequência de comutação do conversor encontra-se perto da frequência de ressonância com o objetivo de diminuir as perdas por comutação e consequentemente transferindo o máximo de energia possível.
Foi feita uma análise de todos os elementos constituintes deste circuito e seu funcionamento em vários regimes. Também são apresentadas outras topologias que são usadas para alimentar os drivers do gerador de Marx, tais como o bootstrap, o inversor com transformador e secundários independentes, e o inversor com transformador e secundários em cascata.
Demonstra-se o dimensionamento e simulação do circuito, em que a sua análise pode ser usada posteriormente para diferentes números de estágios.
Os ensaios experimentais foram feitos com variações de carga nos drivers, e com a aplicação de uma condição adversa no driver de um estágio do gerador de Marx.
In this master thesis a LC series resonant converter with transformer was developed, composed by one primary winding and four independent secondary windings to supplying drivers stages of Marx generator, that are at floating potentials. This converter has been simulated and experimentally tested. The switching frequency of the converter is close to the resonant frequency in order to reduce the switching losses and therefore transferring as much energy as possible. An analysis was made of all elements of this circuit and their operation in various regimes. Other topologies that are used to supply Marx generator drivers are also presented, such as the bootstrap, inverter with independent transformer and inverter with transformer and cascade secondary. It is shown the design and simulation of the circuit, where its analysis can be used later for different numbers of stages. The experimental tests were done with load variations on the drivers, and with the application of an adverse condition on the one stage driver of the Marx generator.
In this master thesis a LC series resonant converter with transformer was developed, composed by one primary winding and four independent secondary windings to supplying drivers stages of Marx generator, that are at floating potentials. This converter has been simulated and experimentally tested. The switching frequency of the converter is close to the resonant frequency in order to reduce the switching losses and therefore transferring as much energy as possible. An analysis was made of all elements of this circuit and their operation in various regimes. Other topologies that are used to supply Marx generator drivers are also presented, such as the bootstrap, inverter with independent transformer and inverter with transformer and cascade secondary. It is shown the design and simulation of the circuit, where its analysis can be used later for different numbers of stages. The experimental tests were done with load variations on the drivers, and with the application of an adverse condition on the one stage driver of the Marx generator.
Description
Dissertação de mestrado para obtenção do grau de Mestre em Engenharia Eletrotécnica – ramo Automação e Eletrónica Industrial
Keywords
Potência pulsada Pulsed power Gerador de marx Marx generator Inversor com transformador Inverter with transformer Conversor ressonante LC série Resonant converter LC series ZVS-Zero voltage switching ZCS-Zero current switching
Citation
LOPES, Filipe Alexandre Pires - Circuito de alimentação de semicondutores colocados a potenciais elevados num gerador de Marx. Lisboa: Instituto Superior de Engenharia de Lisboa, 2019. Dissertação de mestrado.
Publisher
Instituto Superior de Engenharia de Lisboa