Loading...
Publication
Caracterização e Implementação de um Conversor Dual Active Bridge e Respetivo Controlo
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 142.01 MB | Adobe PDF |
Advisor(s)
Abstract(s)
Este trabalho tem como objetivo apresentar o desenvolvimento de um conversor
Dual Active Bridge (DAB).
Numa primeira parte, é apresentado o enquadramento da necessidade do desenvolvimento
deste projeto para a Addvolt, no seu contexto empresarial (eletrificação
de camiões de frio).
É apresentado o Estado da Arte sobre este tipo de conversores. Aqui são abordados
conceitos teóricos sobre vários tipos de conversores de corrente contínua, no
sentido de perceber a necessidade da utilização de isolamento galvânico em aplicações
de alta potência. Ao mesmo tempo, é aprofundado o estudo do conversor
DAB devido à sua robustez e possibilidade de fluxo de potência bidirecional. A par
disto, são apresentados alguns dos componentes utilizados e abordadas algumas das
técnicas de modulação e controlo mais utilizadas neste tipo de conversores.
Após a decisão do tipo de modulação a utilizar no conversor, são efetuados
cálculos e simulações para verificar se, com o material já adquirido, o conversor
consegue atingir o nível de transito de potências para o qual foi dimensionado num
estudo anterior. Foi definido um novo nível de potência e testado o funcionamento
a vários níveis de temperatura.
Posteriormente, é feita a montagem do conversor onde são identificados e resolvidos
alguns problemas e finalizadas todas as etapas de condicionamento de sinal para
a leitura de valores de tensão, corrente e temperatura. Em paralelo com isto, foi
desenvolvido um código em C e uma interface gráfica para o controlo do conversor.
Por ultimo, é testado o funcionamento do conversor, anotados os resultados e
tiradas as conclusões.
This thesis aims to present the development of an DAB converter. The first part presents the background needed to develop this project for Addvolt, in its business context (electrification of refrigeration trucks). The State of the Art on this type of converter is presented. Theoretical concepts on various types of direct current converters are covered in order to understand the need for galvanic isolation in high-power applications. At the same time, the DAB converter is studied in depth due to its robustness and the possibility of bidirectional power flow. In addition, some of the components used are presented and some of the modulation and control techniques most commonly used in this type of converter are discussed. After deciding the type of modulation to be used in the converter, calculations and simulations are carried out to check whether, with the material already acquired, the converter can achieve the power transit level for which it was dimensioned in a previous study. A new power level was defined and the operation was tested at various temperature levels. Subsequently, the converter was assembled, where some problems were identified and solved, and all the signal conditioning stages for reading voltage, current and temperature values were finalised. In parallel with this, C code and a graphical interface were developed to control the converter. Finally, the entire operation of the converter was tested, the results noted and conclusions drawn.
This thesis aims to present the development of an DAB converter. The first part presents the background needed to develop this project for Addvolt, in its business context (electrification of refrigeration trucks). The State of the Art on this type of converter is presented. Theoretical concepts on various types of direct current converters are covered in order to understand the need for galvanic isolation in high-power applications. At the same time, the DAB converter is studied in depth due to its robustness and the possibility of bidirectional power flow. In addition, some of the components used are presented and some of the modulation and control techniques most commonly used in this type of converter are discussed. After deciding the type of modulation to be used in the converter, calculations and simulations are carried out to check whether, with the material already acquired, the converter can achieve the power transit level for which it was dimensioned in a previous study. A new power level was defined and the operation was tested at various temperature levels. Subsequently, the converter was assembled, where some problems were identified and solved, and all the signal conditioning stages for reading voltage, current and temperature values were finalised. In parallel with this, C code and a graphical interface were developed to control the converter. Finally, the entire operation of the converter was tested, the results noted and conclusions drawn.
Description
Keywords
Comutação suave Controlo phase-shift Dual active bridge Isolamento galvânico Modulação SiC MOSFET