The role of new materials in the development of magnetic sensors and actuators

Jiles, David; Lo, C. C. H.

doi:10.1016/s0924-4247(03)00255-3

Cited by 103 publications

(55 citation statements)

References 11 publications

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“…Application of RE-TM (Rare earth-Transition) type magnets allow to obtain good magnetic properties, to improve mass-to-performance ratio and to simplification the construction of devices. [6][7][8][9].The permanent magnetic system is a better alternative braking of an electrical drive, when compared with that of the existing electromagnetic brakes and eddy current brakes. The characteristics and properties vary with the different kinds of an alloy which are used in the manufacture of different permanent magnets and play a vital role in applications.…”

Section: Permanent Magnetic Brake System-critical Analysismentioning

confidence: 99%

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MaruthiRatnaKishore¹

2013

IJCA

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In this work an attempt is made to show that the braking of an electric drives in industries and automobiles using permanent magnets which produce energy while braking and it is a similar one to that of the existing electric regenerative braking. Also to show permanent magnetic system is a better one than existing electromagnetic brake, eddy current brake and electric brakes, etc. KeywordsMagnetic braking of electric drives, braking of motor with permanent magnets, magnetic field braking, magnetic repulsion braking, electric regenerative braking, contactless braking system with permanent magnets.

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Section: Permanent Magnetic Brake System-critical Analysismentioning

confidence: 99%

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MaruthiRatnaKishore¹

2013

IJCA

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“…The magnetization is increased when tensile force was applied to ferromagnetic materials on magnetized condition. Therefore B-H hysteresis curve is changed as shown in figure 3 [8]. By using this property, the stress of steel cable can be monitor by capturing variation of relative permeability.…”

Section: Theorical Backgroundsmentioning

confidence: 99%

Real-Time NDE of Steel Cable Using Elasto-Magnetic Sensors Installed in a Cable Climbing Robot

Park

Kim²,

Lee³

et al. 2011

28th International Symposium on Automation and Robotics in Construction (ISARC 2011)

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ABSTRACT:Recently, the steel cable used infrastructures are improved with progress in construction technology. In particular, the steel cable in long span bridges such as cable stayed bridges and suspension bridges are critical members which suspend dead load due to the main girders and bridge floor slabs. Damage at cable members can occur in the form of cross-sectional loss caused by corrosion and fracture, and it can lead structural failure due to concentrated stress of the cable.Therefore, nondestructive examination for steel cables is necessary so that the cross-sectional loss can be detected. This study proposes a steel cable health monitoring technique using an elasto-magnetic (E/M) sensor installed in a cable climbing robot. The E/M sensor is applied to detect the cross-sectional loss in this study while it was originally developed for measuring the tensile force in the previous works. To verify the feasibility of the proposed damage detection technique, steel bars which have 4-different diameters were fabricated and the output voltage value was measured at each diameter by the E/M sensor. Optimal input voltage and working point are chosen so that the linearity and resolution of results can ensure through repeated experiments, and then the E/M sensor scans the output voltage of the specimens based on the selected optimal condition. This E/M sensor based monitoring technique will be incorporated into the cable climbing robot in the further research. This proposed approach can be an effective automated tool for steel cable health monitoring.

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“…It possesses some specific properties, such as large strain derivative good corrosion resistance, no eddy current loss and low cost (rare-earth free) [6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, investigation on structural and electrical properties of cobalt doped Mn–Zn ferrite nanocrystalline powders

Bhuvaneswari¹,

Sendhilnathan

Kumar³

et al. 2016

Materials Science-Poland

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Synthesis of Co x Mn y Zn y Fe 2 O 4 (x = 0.1, 0.5, 0.9 and y = 0.45, 0.25, 0.05) nanocrystalline powders was done by chemical co-precipitation method. The crystal structure was determined by using X-ray diffraction (XRD) studies. The crystallite size and lattice parameters were calculated from the XRD data. The XRD results revealed that the crystallite size of the nanocrystalline powder was found to decrease from 37 nm to 28 nm with the substitution of cobalt. The effect of cobalt ions on the crystallization process, the lattice parameters and electrical properties of Mn-Zn ferrites has been also investigated. The AC conductivity increased with an increase in frequency but it decreased with an increase in cobalt content. The complex impedance analysis of the data showed that the resistive and capacitive properties of the Co-Mn-Zn ferrite are predominant due to the fact that the processes are associated with the grains and grain boundaries. The dielectric constant and dielectric loss dependence on doping level and frequency at room temperature were also studied.

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The role of new materials in the development of magnetic sensors and actuators

Cited by 103 publications

References 11 publications

Untitled

Untitled

Real-Time NDE of Steel Cable Using Elasto-Magnetic Sensors Installed in a Cable Climbing Robot

Synthesis, investigation on structural and electrical properties of cobalt doped Mn–Zn ferrite nanocrystalline powders

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