In this paper, a novel maglev coupling based on the opposed Halbach array is proposed as interface between linear electro-mechanical converter and 2D valve body. This non-contact possesses several advantages over existing mechanical couplings such zero friction wear, low vibration noise, no lubrication, which expected to greatly improve control accuracy life cycle of valve. A detailed analytica...

The new APPLE X undulators are novel elliptically-polarised undulators, which have a highly symmetric geometry. Theoretically, all the elliptical polarisation states expected to same deflection parameter if magnetic and geometrical errors negligible. Nonetheless, measurements of first ten performed at Paul Scherrer Institut (PSI) contradicted this simple statement numerical simulations were req...

Abstract. Considering the irregularity of wave motion, a energy converter (WEC) based on 6-UCU parallel mechanism has been investigated. A buoy connected to moving platform is used harvest energy. Each chain equipped with linear generator same structure, which can convert absorbed into electrical Based inverse kinematics analysis mechanism, position solved by using space closed-loop vector meth...

Better torque performance and higher reliability have long been the focus of research for slotted limited-angle motors (LATMs), which are primarily used to position first-stage valves in electrohydraulic servosystems. This paper presents a high axial-flux LATM with quasi-Halbach array improvement including constant range (CTR) output torque. Firstly, structure two sets windings operation princi...

In this paper we discuss the design choices and construction strategy of tapered undulator system designed for a high energy extraction efficiency experiment in ultraviolet region electromagnetic spectrum planned installation at Argonne National Laboratory Linac Extension Area (LEA) beamline. The is comprised 4 sections pure permanent magnet Halbach array separated by short break sections, each...

In this paper, the subdomain analysis model of eddy current brake (ECB) is established. By comparing with finite element method, accuracies and are verified. Furthermore, resistance characteristics radial, axial, Halbach arrays under impact load calculated compared. The axial array has a large braking force coefficient but low critical velocity. radial high advantages first two arrays. Not only...

Magnetic fields are a standard tool in the toolbox of every physicist, and required for characterization materials, as well polarization spins nuclear magnetic resonance or electron paramagnetic experiments. Quite often static field sufficiently large, but fixed magnitude is suitable these tasks. Here we present permanent magnet assembly that can achieve strengths up to 1.5T over an air gap len...

This document deals with the design of a Permanent Magnet Synchronous Motor (PMSM) to peripherally drive counter-rotating pump inducer. The motor/pump is associated using rim-driven principle where motor’s active parts are located at periphery inducer blades. It proposes Halbach array permanent magnets for rotor motor. solution allows generation Sinusoidal Electromotive Force (EMF). Therefore, ...

The purpose of this paper is to investigate the effect alternate flux bridge combining Halbach array in Vernier machines. key novelty that integrated with PM, design can not only provide a path for low-order harmonics but also effectively improve torque density machine. Together other three traditional structures under same overall size, current density, and PM usage, proposed structure optimiz...

Permanent magnet variable flux sources are produced by rotating two nested N-segment, permanent magnet, Halbach cylinders. Torque is primarily an end effect, determined by field non-uniformities due to the fmite length and' segmented structure of the cylinders. Due to symmetry, one cylinder experiences zero torque In a uniform applied field. Experiment and numerical simulation reveal that the t...