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Conception et réalisation des convertisseurs de puissance dédiés aux véhicules électriques

Abstract : Even being far from spared by the new challenges, the automotive sector is at the heart of changes as it produces near to 22% of greenhouse gas emissions and it is responsible for air pollution and global warming. So, moving towards electricity productions based on green/clean energy has become increasingly important. The fuel cell (FC) produces electrical energy from hydrogen and oxygen without the release of pollutants. Its use in the automotive sector is therefore considered in the long term to address the problem of sustainable mobility. However, some issues are still arising because of the low voltage produced at the fuel cell output. Subsequently, a DC/DC converter becomes essential to rise up this voltage to the suitable level of the DC bus voltage. In order to fulfill all requirements for electrical vehicle applications using fuel cell as main energy, the interleaved boost DC/DC and isolated DC/DC converters were adopted to provide better performance: low mass and small volume, high energy efficiency, high power density, low cost, low electromagnetic distribution and reduced current ripple in order to lengthen the fuel cell life. This research work focuses on the design and realization of two new topologies of DC / DC power converters that interface a fuel cell to the drive system of an electric vehicle. The first converter is the parallel resonant dc/dc boost converter which provides a wide voltage range for the DC bus and it offers protection for the fuel cell. The second converter is the interleaved DC /DC boost converter which ensures the minimization of the output current ripple of the fuel cell and guarantees the reliability of the system.
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Submitted on : Monday, August 17, 2020 - 12:41:20 AM
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Farhani Slah. Conception et réalisation des convertisseurs de puissance dédiés aux véhicules électriques. Energie électrique. École Nationale Supérieure d'Ingénieurs de Tunis, 2019. Français. ⟨tel-02915929⟩

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