A light weight, simple design NMR apparatus consists of 24 identical magnets arranged inHalbach array was designed and built. The homogeneity of the magnetic field B0 can be improved bydividing a long magnets into several rings. The size of the useful volume depends on both the gapbetween each ring and some others shim magnets. Our aim is to enhance the sensitive volume and toma...

The paper deals with the design and optimization of a novel magnetic switchable device based on Halbach array. The magnetic field in air gap is adjustable by rotating the center axis of adhesion mechanism so that the magnetic adhesion force is variable, and it is convenient for device to adsorb on and detach from the ferromagnetic workpiece or surface. The magnetic field model is established by...

We optimized the magnetic field homogeneity of two canonical designs for mobile microfluidic nuclear resonance (NMR) applications: parallel magnets with an air gap and a modified Halbach array. Along influence sample length, general design guidelines will be presented. For fair comparison, sensitive length has been chosen to same as size between ensure enough space transmitting receiving unit, ...

An eccentric harmonic magnetic gear (EHMG) is better suited for situations requiring larger transmission ratios than magnetic-field-modulated gears. In the meantime, to increase torque density even further, a new structure EHMGs presented in this paper. The stator’s permanent magnets (PMs) are irregularly distributed, while rotor’s PMs applied fan-shaped structure. Moreover, Halbach array adopt...

This study is concerned with the magnetic force models of magnetic bearing in a flywheel energy storage system (FESS). The magnetic bearing is of hybrid type, with axial passive magnetic bearing (PMB) and radial hybrid magnetic bearing (HMB). For the PMB, a pair of ring-type Halbach arrays of permanent magnets are arranged vertically to support the rotor weight. For the HMB, a set of ring-type ...

Abstract Magnetic nanoparticles are used in a wide range of medical applications. However, the accurate steering particles through vascular system is still an open research question. Thus, this paper introduces novel hybrid magnetic array for bifurcation. The consists permanent plus electromagnets and based on Halbach structure. It combines advantages strong field low-cost magnets with adjustab...

A methodology is proposed for optimal shaping of permanent magnets with non-conventional and complex geometries, used in synchronous motors. The algorithm includes artificial neural network-based surrogate model and multi-objective search based optimization method that will lead to Pareto front solutions. An interior permanent magnet topology with crescent-shaped magnets is also introduced as t...

Two types of passive magnetic lift bearings were evaluated in terms of thrust force and eddy current losses. The first type of bearings were based on two sets of segmented Halbach arrays mounted in repulsive mode, and the second type was based on ring-magnets. The eddy-currents studied arose in the bearing due to manufacturing variations of magnetic remanence, and due to non-radial magnetizatio...