Tesi esterna in azienda    

PAROLE CHIAVE SIC AND GAN INVERTER, MOTORSPORT APPLICATIONS

RIFERIMENTI IUSTIN RADU BOJOI

DESCRIZIONE Traction inverters are a cornerstone in the architecture of electric and hybrid vehicles, playing a pivotal role in converting DC power from the battery into AC power to drive the motors.
Within these systems, DC-Link capacitors are key components that significantly impact performance size and safety. These capacitors are responsible for smoothing out the DC power from the battery before it gets converted into AC power, ensuring a stable and clean energy supply to the inverter. This stability is crucial for the proper functioning of the inverter and, by extension, the entire vehicle's drivetrain. The quality of the DC power supplied to the inverter affects everything from the efficiency of power conversion to the lifespan of the inverter itself.
Last generation of drives are more and more requesting DC-Link capacitor with smalls size and capable to work at high frequency in association with Wide band gap device (SiC & Gan) and a deep characterization of them is so needed in this range.

Thesis task
The target of the thesis is to build a complete 3D design flow for a dc-link power capacitor for motorsport applications (F1, FE and others), with special focus on high frequency (>100kHz) characterization.
The design process of a DC-Link capacitor for motorsport applications begins with analytical sizing, where MATLAB is utilized for calculating the required capacitance, voltage rating, and ripple current specifications based on the demanding operational conditions of motorsport.
This critical first step ensures that the capacitor meets the high-performance standards necessary for such applications. Following this, Finite Element Method (FEM) simulations conducted in Ansys enable the detailed analysis of electromagnetic and thermal behaviours.
These simulations help in accurately estimating parasitic elements such as Equivalent Series Resistance (ESR) and Inductance (ESL), which are pivotal for understanding the capacitor's performance with special focus on high frequency switching conditions common in motorsport environments. Additionally, FEM simulations facilitate the precise calculation of losses, ensuring the capacitor's efficiency and reliability.

VEDI ANCHE  https://www.peic.polito.it/education/call_for_theses/available_topics/thesis_in_a_company/high_frequency_advanced_dc_link_modelling_for_motorsport_inverters

CONOSCENZE RICHIESTE Requirements:
• Basic knowledge of power electronics converters principles and topologies
• Background on power electronics components
• Good knowledge of MATLAB and FEM concept
• Basic knowledge of analog circuit design
• Analytical skills

SCADENZA VALIDITA PROPOSTA 31/01/2025