Vysokoteplotná supravodivá cievka pre motory elektrických a hybridných lietadiel
High temperature superconducting coils in motors for electric and hybrid aircrafts
Program: SRDA
Project leader: Mgr. Pardo Enric PhD.
Annotation: Full superconducting electric motors are very promising to provide therequired power density to enablecommercial hybrid and electric airplanes. These can reduce emissions by75 % in CO2 and 90 % in NOx, followingthe ACARE Flightpath 2050 targets of the European Union. Superconductingmotors can also be applied to cleanersea or sweet water transport. In spite of the extensive research in thearea, the electro-magnetic and electro-thermal properties of superconducting coils in the motor magneticenvironment remain largely unknown, partiallybecause of the lack of measurements of the relevant temperatures(between 20-40 K) and modeling methods forfull superconducting motors.The aim of this project is to gain this understanding and develop numerical modeling methods to enable the design of future superconducting motors. These methods will be compared to experiments in the relevant temperature range for motor applications.
Duration: 1.7.2020 – 30.6.2023
Pokrokový MgB2 supravodič bez difúznej bariéry
Advanced MgB2 superconductor without diffusion barrier
Program: VEGA
Project leader: Ing. Kováč Pavol DrSc.
Annotation: The essence of the project is to prepare and optimize the method of preparation of superconducting composite wire (filaments) by the method of magnesium infiltration or diffusion into boron. The main emphasis will be focused on the simplicity of preparation (without the diffusion barrier), the availability and suitability of the sheath materials and their electro-mechanical properties. The properties of the MgB2 superconducting core will be controlled by technological preparation, annealing conditions, and possible doping. Selection of suitable materials and technological processes allows monitoring of effects on micro-structure, mechanical properties and superconductive properties: critical current density at temperatures in the range of 4.2 – 20 K, critical temperature, connectivity or losses in alternating magnetic field. The role of the project will be also to examine the possibility of creating superconducting links.
Duration: 1.1.2020 – 31.12.2021
Supravodivé vinutia z homogénnych MgB2 drôtov s trubičkovými vláknami
Superconducting coils made of uniform MgB2 wires with tubular filaments
Program: SRDA
Project leader: Ing. Kováč Pavol DrSc.
Annotation: The aim of this project is to develop the process of infiltration/diffusion (IMD) for long and uniform superconducting wires with tubular MgB2 filaments resulting in high engineering current densities measured in coils cooled by solid nitrogen in persistent mode. The main aim is to increase three times the engineering current density in long IMD MgB2 wires in comparison to those commercially obtained by powder-in-tube (PIT) process, especially in the range of magnetic fields 1-5T and temperatures around 20K
Duration: 1.7.2019 – 30.11.2021
MAPKO – Magnetické plášte z kompozitov supravodič/feromagnetikum
Magnetic cloaks from superconductor/ferromagnet composites
Program: SRDA
Project leader: doc. Ing. Gömöry Fedor DrSc.
Annotation: Realization of a magnetic cloak allowing to hide objects from being observed by a magnetic detector enables the experimental study of several fundamental problems of electromagnetism as well as the searching for innovative solutions of practical problems of magnetic field shielding and shaping. Main aim of the project is the development of methods for design and realization of magnetic cloaks that would provide the possibility to investigate these topics. Basic property we will pursue is the magnetic invisibility when a detector placed outside the cloak will not notice the cloak itself nor a “magnetic cargo” it would contain. Theoretical predictions for reaching perfect invisibility assume unrealistic properties of the used materials and work with ideal and simple shapes without any limitation of dimensions. That is why an important part of the project will be the search and testing of new numerical modelling methods able to include these substantial aspects of real objects. With help of these novel methods we plan to demonstrate the 99% perfection in magnetic invisibility at frequencies from DC to 1000 Hz. Our research could help to reach the following goals: a) Creation of space for experiments in biology shielding the Earth magnetic field as well as that produced in urban environment. Room temperature cylindrical space with at least 50 mm diameter and 150 mm height should allow easy sample exchange and manipulation. b) Design and manufacturing of the cloak for magnetic fields in the 0.1 T range with the volume exceeding 1000 cm3 for the purpose of protecting a sensitive electronic circuitry or e.g. formation of working space for DC arc welding in vicinity of electrical machines generating the stray field at this level. c) Investigation of force exerted on the cloak by a non-uniform magnetic field, in particular the possibility of a magnetic propulsion with help of controlling the magnetic moment of the superconductor/ferromagnet composite.
Duration: 1.7.2017 – 28.2.2021