We have already reported an advanced method for producing a radially-anisotropic rare earth composite bonded magnet with continuously controlled direction of anisotropy. The magnet has been applied to an inner rotor as a practical usage. In this study, the outstanding preparation method was adopted into the preparation of a magnet applied for an outer rotor. An optimized condition of extrusion ...

A scalable concept to prepare high current density windings with high-temperature superconducting material is introduced. The covers miniaturized high-current and large coils for applications in energy technology as well. principle based on a circular disk-up-down-assembly ('DUDA') extended rectangular coils. First measurements the assemblies (?40 turns) liquid nitrogen are presented proof-of-c...

Booklet Funded by the Alfried Krupp von Bohlen und Halbach-Stiftung, Essen and the Deutsche Forschungsgemeinschaft, Bonn

Permanent magnet (PM) array affects flux field distribution of electromagnetic linear machines significantly. A novel dual Halbach array is proposed in this paper to enhance flux density in air gap, and thus to improve output performance of linear machines. Magnetic field in three-dimensional (3D) space of a tubular linear machine with dual Halbach array is formulated based on Laplace’s and Poi...

To enhance the output torque and minimize ripple of coaxial magnetic gear (CMG), a novel auxiliary flux modulator CMG with unequal poles is proposed. This design incorporates an inner rotor asymmetric sector trapezoidal combined N-S pole structure, featuring Halbach arrays for arrangement permanent magnets (PMs). The outer PMs adopt Spoke-type configuration. optimize high low ripple, sensitivit...

Introduction Development of mobile NMR and MRI has been pursued since the pioneering work on well-logging, in order to reach the performance of high-resolution systems. Permanent magnets are the key to such mobile systems and the development of rare earth NdFeB and SmCo materials allows the generation of high strength magnets. However, most systems currently used are based on bar magnets or Hal...

Obtaining a highly homogeneous magnetic field is desired for field-controlled applications. For example, the resolution of analysis methods can be improved by generating stronger and more over region interest (ROI). A set 3D-printed passive shims fabricated using additive manufacturing to improve homogeneity Halbach magnet assembly. The feedstock custom acrylonitrile butadiene styrene (ABS)-har...

An experimental project aimed at demonstrating Free Electron Maser (FEM) operation with prebunching is under way at Tel-Aviv university. The FEM utilizes a 1.0 A prebunched electron beam obtained from a microwave tube. The electron beam is bunched at 4.87 GHz and is subsequently accelerated to 70 keV. The bunched beam is injected into a planar wiggler (B, = 300 G, A, = 4.4 cm) constructed in a ...

High performance force sensors often encounter the problem of vibrations during the process of calibration and measurement. To address this problem, this paper presents a novel passive eddy current damper (ECD) for vibration suppression. The conceived ECD utilizes eight tubular permanent magnets, arranged in Halbach array, and a conductive copper rod to generate damping. The ECD does not requir...