Modeling and control design of an electric vehicle powertrain

This degree project work has been carried out in the context of in the Hybrid InnovativePowertrain (HIP) project presently executed by the company Altran Technologies S.A.. Itspurpose is to provide clients with a modular platform to model and simulate their vehicleas accurately and as fast as possible. The idea is to build a custom Simulink library with ablock for each major component found in any road vehicle. The platform must enable clientsto model battery electric vehicle as well as plug-in hybrid or fuel cell vehicles with differentpowertrain topologies. It must provides component blocks for each layer of control, fromhigh-level energy efficiency algorithms embedded in high authority hardware to low-levelcomponent control solutions.The work presented here contributes to the development of the modular powertrain electricpart with the electric motor, the inverter and the chopper. It is composed of three mainsteps :• Building an electric powertrain model with its proper control schemes in order to enablefast simulations. The model must be split into blocks that become part of the projectlibrary.• Building a more realistic model that takes into account the discontinuous switchingdynamics and the discrete nature of the actual controllers, in order to verify andvalidate the control effectiveness• Designing a diagnostic method for inverter faultsThe first part of this work is dedicated to a literature review of automotive electric drivessolutions as well as the research in progress in the domain, notably in fault detection schemes.The mathematical models and controller designs used for the simulations are developed in asecond part. The last part presents the software implementation aspects and the analysedsimulation results.Detta examensarbete har utförts inom ramen för det så kallade Hybrid Innovative Powertrain(HIP)-projectet vid företaget Altran. Syftet med arbetet har varit att kunna förseolika klienter med en modulär plattform för att kunna modellera och elfordon så noggrantoch snabbt som möjligt. Huvudidén har varit att ta fram ett modellbibliotek i Simulink representerandenyckelkomponenterna i ett vägfordon. Plattformen möjliggör modellerandetav helelektriska fordon samt även plug-in hybridfordon och bränsecellsdrivna fordon. Inomramen för detta examensarbete har elmotor, omriktare samt dc-dc-omvandlare modellerats.Modeller både inkluderande och exkluderande kraftelektronikens (antaget ideala) switchförlopphar tagits fram. Modellen inkluderande switchförlopp har även använts för att studeraen metodik för att diagnostisera omriktarfel. Första delen av examensarbetet presenteraren litteraturundersökning med särskilt fokus på metoder för feldetektering. Matematiskamodeller och regulatordesign beskrivs i arbetets andra del. Arbetets sista del beskrivermjukvaruimplementeringen samt analyserar de erhållna simuleringsresultaten