Synopsis This course will provide students with knowledge on the concept of superconducting materials, on their electromagnetic modelling and its main applications in electrical systems. To accomplish this, the course is divided in: 1) Concept of superconducting state: (1.5h) Definition of main electromagnetic characteristics of superconductors. Definition of superconducting state and critical region. The Meissner effect. Comparison between type I and type II superconductors. State-of-the-art high-temperature superconductors (HTS). 2) High-Temperature Superconductors (HTS) modelling: (2.5h) Electromagnetic characterization of HTS materials through a non-linear E-J power law (nonlinear electrical resistivity). Bean’s and Kim’s HTS models. Approximated lumped parameter models. Simulation of HTS materials using Finite-Element tools. Introduction to HTS bulks and tapes. 3) HTS bulks magnetization: (3h) Definition of different types of HTS bulks magnetization: Zero-Field-Cooled (ZFC), Field- Cooled (FC) and pulse-field magnetization (PFM). Examples of magnetization with simulation and experimental results: Pulse-field magnetization for electrical machines, Zero- Field-cooled and Field-cooled magnetizations for levitation systems. 4) HTS applications in electrical systems: (5h) a. HTS bulks applications. Using HTS bulks in levitation systems. Examples: Maglev (superconducting magnetic levitation vehicle) and levitation bearings for high-speed flywheels. Electromagnetic modelling using Finite-elements tools. Comparison with experimental results. Levitation forces and levitation stability. Using HTS bulks in electrical machines. Air-core and ferromagnetic-core electrical machines. Trends in aircraft applications. Main challenges and opportunities. b. HTS cables applications: HTS cables and different configurations. Concept of critical current. Application in power transmission lines and in electrical machines (as armature or field windings). Main challenges and opportunities.

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Concept of superconducting state. Electromagnetic modelling. Applications in electrical systems: Levitation systems, electrical machines and power cables.

A distanza in modalità sincrona

Presentazione orale

P.D.1-1 - Dicembre

• Virtual Classroom - Martedì 12/01/2021 - ore: 14.30-17.30 - Giovedì 14/01/2021 - ore: 14.30-17.30 - Martedì 19/01/2021 - ore: 14.30-17.30 - Giovedì 21/01/2021 - ore: 14.30-17.30