This study proposes an improved design of eddy-current speed sensor (ECSS) by adding a ferromagnetic core to the stator, resulting in sensitivity enhancement ranging from three sixty times compared reference model according shaft materials. An analytical (AM) based on harmonic modeling (HM) is developed account for effects permeability, validated through finite element analysis (FEA), demonstrating excellent agreement between two methods. Based this model, optimal dimensions proposed are...

This study proposes an innovative approach that integrates the subdomain method with sequential quadratic programming (SQP) to optimize volume of a high-speed surface-mounted permanent magnet synchronous motor in air compressor operating at 110 000 rpm. Unlike conventional optimization tools often rely on finite element analysis (FEA) software, by leveraging for electromagnetic modeling, we obtain analytical solution rapidly represents behaviors motor. Subsequently, SQP technique is applied...

This study presents an approach to optimizing the output power in a magnetically geared generator by employing subdomain modeling and particle swarm optimization. Accordingly, analytical method is utilized obtain induced voltage, inductance which are used predict power. Afterward, intelligence optimization technique applied reach maximum point. The 12/17/15 prototype evaluated proposed model comparing calculated results finite element simulation.

This study presents an approach to calculating the temperature increase in internal components of permanent magnet synchronous machines by applying lumped-parameter thermal networks and analytical methods. Accordingly, equivalent circuit method is employed obtain temperatures machine’s components. Furthermore, this predicts distribution slot area. The 24/6 prototype was used evaluate proposed model comparing calculated finite element simulation.

This paper focuses on proximity losses prediction in conductors of power electronics transformers. The method is based the concept equivalent complex permeability applied to rectangular conductors. A 1-D analytical model analyzed. It has been shown that does not take into account edge effects. Two complementary approaches have proposed. One treats scattered conductors; other deals with package Both are compared a good accuracy and economic computation time

This paper describes the route, from simulations toward experiments, for optimizing magnetoelectric (ME) geometries vortex magnetic field sensors. The research is performed on base of Metglas/Piezoelectric (PZT) laminates in both open and closed circuit (OMC CMC) with different widths (W), lengths (L), diameters (D). Among these geometries, CMC demonstrate advantages not only their flux distribution, but also sensitivity independence position center. In addition, ME voltage signal found to...

Distance magnetic nanoparticle detections were investigated by using a magnetoelectric based sensor with long type bilayer Metglas/PZT laminate composite. In homogeneous fields, the exhibits sensitivity of 307.4 mV/Oe, which is possible for detection limit 2.7 × 10−7 emu. This can detect an amount 0.31 μg superparamagnetic Fe3O4-chitosan fluid at 2 mm height above surface. To spot nanoparticles distance about 7.6 mm, it should contain least 50 iron oxide. approach develop local depth...

Anisotropic magnetoresistive (AMR) sensors have long been used for specific industrial applications. Their field detection sensitivity can be improved using magnetic flux concentrators to amplify the strength sensed at sensor. We report on design and fabrication of a micrometer-size meander AMR bridge sensor with an effective branch length 150. This geometry has enabled us achieve as high 1.25 mV/Oe (or 0.45 mV/V/Oe), which is enhancement by factor about 300 compared conventional thin...

The approach of magnetic scalar potential T/sub 0//spl phi/-/spl phi/ is widely popular for solving problems coupled with electric circuits. However, cuts are required to preserve the Ampere's law case ferromagnetic circuits holes surrounded by coils. manual definition might not be evident even experimented finite-element (FE) users. This paper presents a new automatic generation algorithm. First, we present tool that allows determining if region has or not. If found, then inflated get...

This study presents an approach for calculating the stress and deformation increase in modulation of magnetically geared machines using a mathematical method. An analytical method is employed to obtain magnetic force density acting on components. Afterward, proposed predicts mechanical characteristics. The 9 slots/32 poles/19 modulations model was evaluated via comparison with finite element simulation.

To ensure the magnetostrictive softness, homogeneity, decrease of shear-lag effect and space-saving construction narrowed longitudinal-transverse L-T magnetoelectric (ME) composites, a novel parallel-connected-multi-bars (PCMB) geometry PZT/Metglas is proposed investigated by simulation experiment. In this case, Metglas layers are structured in different geometries from conventional single bar (c-SB) to separated multiple bars (c-SMB), elongated separate multi-bar (e-SMB) n-magnetic-bar...

La prise en compte des pertes dans les bobinages comprenant un grand nombre de conducteurs est rapidement hors portée logiciels par éléments finis trois dimensions.Nous proposons comme alternative une technique d'homogénéisation l'intermédiaire propriétés macroscopiques complexe.Un exemple test valide la démarche proposée.ABSTRACT.The calculation of eddy current losses in the windings, which have a big number conductors, is very quickly out FEM software capacity 3D.We introduce one by using...

2D multipolar expansion is extended to account for externally created field and numerous relations are derived. The most general outside or inside a cylinder can be by current density flowing axially on the surface of cylinder. Such also cancel generated either external sources internal sources. Knowing 1 component 2 coaxial cylinders allows both internally fields identified

To reach the goal mentioned in title, an intuitive solution using two pieces of ferrite is first proven to be effective. Then, removed and externally applied field that minimizes losses searched. This done a new optimization tool (GOT) taking advantage multipolar expansion external

This paper proposes a methodology to predict proximity losses in conductors of power electronics transformers working at high frequencies. The method is based on the concept equivalent complex permeability applied rectangular conductors. Two different approaches are compared with good accuracy and economic computation time

Currently, research on life cycle and product management is of interest in many countries, especially for products high complexity long service life. One the issues calculation determination costs. Calculating costs will allow managers users to know cost that needs be spent acquiring (purchase cost), as well corrective maintenance cost, preventive operation disposal also indicates economic efficiency purchasing, operating using this product.This paper presents mathematical model allowing a...

Poly(N-vinyl caprolactam) (PNVCL) is a thermally responsive polymer. Its temperature-responsive properties make it an attractive candidate for various applications. A series of temperature-sensitive PNVCL were synthesized through free radical polymerization, using amount Azobisisobutyronitrile (AIBN) as initiator agent and with reaction temperatures set at 60oC, 70oC, 80oC. The percent conversion polymerization was determined the Hubl method to investigate effects three factors:...

In this study, the Cu/TiB2 composite coating was successfully prepared by laser cladding on H13 hot work die steel. The experimental results show that microstructure of is relatively homogeneous distributed and TiB2 hard particles are dispersed in copper Cu coating. thickness approximately 500‒600 μm. Scanning electron microscopy (SEM) analysis showed there a metallurgical bond between substrate, which ensure strong binding ability. maximum microhardness up to 700 HV0.2, significantly...