Optimization of a csi inverter and dc/dc elevator with silicon carbide devices, for applications in electric traction systems
- Autores: Efrén Esteban Fernández Palomeque
- Directores de la Tesis: José Luis Romeral Martínez (dir. tes.), Vicente Miguel Sala Caselles (codir. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2019
- Idioma: español
- Tribunal Calificador de la Tesis: Eduardo Galván Díez (presid.), Juan Manuel Moreno Eguilaz (secret.), Harold Saavedra Ordóñez (voc.)
- Programa de doctorado: Programa de Doctorado en Ingeniería Electrónica por la Universidad de las Illes Balears y la Universidad Politécnica de Catalunya
- Materias:
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- Resumen
The applications of electric traction systems currently focus on developing technologies with greater energy efficiency and lower environmental impact. Manufacturers of hybrid and electric vehicles are looking for ways to improve and optimize the efficiency of their models.
Manufacturers are looking for more efficient and more compact converter topologies. The use of new band gap materials in the construction of these topologies has generated many debates and new lines of research especially in the optimization of these topologies. The silicon carbide (SiC) based switching devices provide significant performance improvements in many aspects, including lower power dissipation, higher operating temperatures, and faster switching, compared with conventional Si devices, all these features make that these devices generate interest in applications for electric traction systems.
This work presents a method for improving total harmonic distortion (THD) in the currents of output and efficiency in SiC current source inverter for future application in an electric traction system. The method proposed consists in improving the coupling of a bidirectional converter topology V-I and CSI. The V-I converter serves as a current regulator for the CSI and allows the recovery of energy. The method involves an effective selection of the switching frequencies and phase angles for the carriers signals present in each converter topology. With this method, it is expected to have a reduction of the total harmonic distortion THD in the output currents. In addition, an analysis of the losses in the motor and topologies of power converters is developed considering the optimization method previously analyzed. The weighted average efficiency of the whole system (power converters + motor) in differents conditions of operations is presented.
