AC Loss in High-Temperature Superconducting Bulks Subjected to Alternating and Rotating Magnetic Fields

Abstract

High-temperature superconductor (HTS) bulks have demonstrated extremely intriguing potential for industrial and commercial applications due to their capability to trap significantly larger magnetic fields than conventional permanent magnets. The magnetic field in electrical rotating machines is a combination of alternating and rotational fields. In contrast, all previous research on the characterization of electromagnetic properties of HTS have solely engrossed on the alternating AC magnetic fields and the associated AC loss. This research paper gives a thorough examination of the AC loss measurement under various conditions. The obtained results are compared to the finite element-based H-formulation. The AC loss is measured at various amplitudes of circular flux density patterns and compared with the AC loss under one-dimensional alternating flux density. The loss variation has also been studied at other frequencies. The findings in this research paper provide more insights into material characterization, which will be useful in the design of future large-scale HTS applications.

Enhancing Performance of Permanent Magnet Motor Drives through Equivalent Circuit Models Considering Core Loss

“…To tackle these challenges, numerous research endeavors have been undertaken. These include the application of novel and advanced electromagnetic materials exhibiting lower specific power loss and improved high-frequency characteristics , advanced modeling of material properties that account for the actual operational conditions of electric motors [38][39][40][41][42], the implementation of application-oriented, system-level, multi-disciplinary, multi-objective robust design and optimization considering various factors, manufacturing uncertainties, and operational conditions [43][44][45][46][47][48], as well as the development of advanced control methods to optimize operational performance [49][50][51][52][53][54][55].…”

“…This becomes particularly crucial given the relatively nascent nature of these materials, where their behaviors are not yet fully known. Consequently, some researchers have delved into investigating these material properties under varied conditions, encompassing two-dimensional (2D) and three-dimensional (3D) rotational magnetic flux densities of different magnitudes and frequencies, alongside diverse operational temperatures and mechanical stress factors [38][39][40][41][42].…”