Koami KPOTO will defend his PhD on May 31st, 2024 at 1:30 PM.
Place : Université Claude Bernard Lyon 1, Conference room of the Science Library "BU Science"
Attention, this defense is only open to members of the Ampère Laboratory (permanent staff or doctoral students) and the candidate’s family. The defense is classified as confidential.
Jury :
Rapporteurs :
Mme Mounira BERKANI, Professeure associée, ENS Paris Saclay, SATIE
M. Huai WANG, Professeur des universités, Aalborg University, AAU Energy
Examinateurs :
M. Maurice FADEL, Professeur des universités, Université de Toulouse, Laplace
Mme Rosario FERRIGNO, Professeure des universités, Université de Claude Bernard Lyon 1, INL
Mme Marie-Cécile PERA, Professeure des universités, Université de Franche-Comté, FEMTO-ST
Encadrement :
M. Guy CLERC, Professeur des universités, Université de Claude Bernard Lyon 1, Ampère, Directeur de thèse
M. Bruno ALLARD, Professeur des universités, INSA Lyon, Ampère, Co-Directeur de thèse (Invité)
M. Federico BRIBIESCA-ARGOMEDO, Maître de Conférences, INSA Lyon, Ampère, Encadrant de thèse (Invité)
M. André MOURRIER, Ingénieur, Infineon Technologies, Encadrant de thèse
Abstract :
Throughout its lifecycle, the wire harness in a vehicle experiences changes from external factors, ageing, or unintended actions that can affect the electrical system performance and reliability. With the growing complexity of modern cars, challenges exist in accurate diagnosis of the wire harnesses, despite various methods like visual inspections, X-rays, thermal imaging, Line Impedance Resonant Analysis (LIRA), and reflectometry. Although reflectometry is promising, its sensor-based is expensive for automotive use. It becomes more and more critical to evaluate electrical wiring at the manufacturing and during the lifetime of the vehicle. This thesis introduces an impedance map concept, measuring impedance parameters (resistance and inductance) of power network lines as matrices. Accurate, chip-integrable methods are needed to estimate the wire line resistance and inductance. The developed inductance measurement method can detect 10 cm of wire length variations while the developed line resistance measurement method is capable of identifying 5 mΩ variation. The latter method also measures load capacitance value changes. The designed boards for line inductance, resistance, and load capacitance measurement are used for a wire health check system that allow to establish an impedance map for a three-line power network test.
Keywords:
Wire diagnosis, impedance measurement, inductance measurement, resistance measurement, impedance map, wire guard.