1. 3D Modeling of Coils for Pulsed Field Magnetization of HTS Bulk Pellets in an Electrical Machine
- Author
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Mariusz Stepien, Alexandre Colle, Kévin Berger, Thierry Lubin, Boguslaw Grzesik, Jean Lévêque, Jakub Kapek, Groupe de Recherche en Energie Electrique de Nancy (GREEN), Université de Lorraine (UL), Department of Power Electronics, Electrical Drives and Robotics, Silesian University of Technology, The authors would like to acknowledge the 'Région Lorraine' for its financial support concerning the purchase of the pulsed current source. Jakub Kapek would like to thanks the Erasmus+ program for the funding of his internship in Nancy., and The authors would like to thank Rachid Dadi from VACUUMSCHMELZE GmbH for providing us with the VACODUR 50 material, and Salah Eddine Bentridi for the English proofreading of the final version of the paper.
- Subjects
Cryostat ,Transient state ,Materials science ,Inductor ,01 natural sciences ,Magnetization ,0103 physical sciences ,Electrical and Electronic Engineering ,010306 general physics ,Inductance ,Pulse measurements ,010302 applied physics ,Superconductivity ,Condensed matter physics ,[SPI.NRJ]Engineering Sciences [physics]/Electric power ,Modeling ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,Magnetic field ,Superconducting rotating machines ,[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con] ,Very high field and NMR magnets ,[SPI.ELEC]Engineering Sciences [physics]/Electromagnetism ,Electromagnetic coil ,Bulk conductors - Abstract
International audience; In this work, we propose to study and design a coil used to magnetize, by means of a Pulsed Field Magnetization (PFM) process, an inductor of a radial flux superconducting machine with one pair of poles. Each pole contains four similar HTS bulks of 30 mm diameter arranged in a square pattern. The cryostat already exists for this application and the temperature of the HTS bulks can vary from 4.2 K to their critical temperature, in transient state. For a given primary source of energy, here a capacitor bank of 10 kJ (5 mF, 2 kV) is available, the PFM process depends strongly on the value of the coil inductance used to generate pulsed field, because it defines the waveform of the current: peak value and time constant. Thus, 3D modeling of the coil is required in order to be sure that its inductance and the magnetic field produced will provide a full magnetization of HTS bulks. From the practical point of view, we would like to achieve an average magnetization of each pole around 3 T. In this paper, numerical modeling of coils with different number of turns coupled with circuit's equations is achieved. The maximum magnetic field obtained on the HTS bulks and estimated magnetization at the top center of each HTS bulk, are presented and discussed.
- Published
- 2018