Characteristic investigation of permanent magnet actuator for vacuum contactors operating with an intrinsically safe low voltage

Fang, Shuhua; Lin, Heyun; Ho, S. L.; Wang, Xianbing; Jin, Ping

doi:10.1007/s11431-012-4745-5

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…The full hysteresis loop was obtained from -17 kOe to 17 kOe. 7 | P a g e Figure 4 shows the magnetic properties of a pure iron oxide reference sample and the CAPAD processed iron oxide composite with an addition of 5 wt. % of graphite (red line), and iron oxide composites with an addition of 2.5 wt.…”

Section: Materials Synthesis and Characterizationmentioning

confidence: 99%

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Thermal and magnetic properties of nanostructured densified ferrimagnetic composites with graphene - graphite fillers

et al. 2017

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We report the results of an experimental study of thermal and magnetic properties of nanostructured ferrimagnetic iron oxide composites with graphene and graphite fillers synthesized via the current activated pressure assisted densification. The thermal conductivity was measured using the laser-flash and transient plane source techniques. It was demonstrated that addition of 5 wt. % of equal mixture of graphene and graphite flakes to the composite results in a factor of ×2.6 enhancement of the thermal conductivity without significant degradation of the saturation magnetization.The microscopy and spectroscopic characterization reveal that sp 2 carbon fillers preserve their crystal structure and morphology during the composite processing. The strong increase in the thermal conductivity was attributed to the excellent phonon heat conduction properties of graphene and graphite.The results are important for energy and electronic applications of the nanostructured permanent magnets. management 3 | P a g e

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Section: Materials Synthesis and Characterizationmentioning

confidence: 99%

“…Permanent magnets, used in a variety of applications, ranging from power sources to switches and actuators [6][7], can be exposed to temperatures higher than or approaching the Curie temperature.…”

Section: Introductionmentioning

confidence: 99%

Thermal and magnetic properties of nanostructured densified ferrimagnetic composites with graphene - graphite fillers

et al. 2017

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Design, Optimization, and Intelligent Control of Permanent-Magnet Contactor

Lin

Wang

Fang

et al. 2013

IEEE Trans. Ind. Electron.

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This paper presents the design method of a permanent-magnet (PM) actuator and an intelligent control module for the associated PM contactor. The original design parameters of the PM actuator are obtained using magnetic circuit method. The optimization model for the PM actuator is solved by genetic algorithm and simulated annealing algorithm. A monostable cylindrical 140-A PM contactor is designed, and the corresponding intelligent control module of the actuator is developed. A dedicated control technique based on voltage feedback is proposed to realize the intelligent dynamic adjustment of the making process for the PM contactor. The electromagnetic force calculation model, the dynamic making model of the iron core and contact, the buffering model for the iron core, and the contact bounce model are all built using MATLAB. Experimental results are reported to showcase the correctness of the simulation method and the effectiveness of the feedback control technique to decrease the closing velocities of both the movable contact and the moving iron core that, in turn, will reduce the first and the second contact bounces significantly to lengthen the life span of the device.

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Thermal and Magnetic Properties of Nanostructured Ferrimagnetic Composites with Graphene - Graphite Fillers

Ramirez¹,

Chan²,

Rojas-Hernández³

et al. 2016

Preprint

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Characteristic investigation of permanent magnet actuator for vacuum contactors operating with an intrinsically safe low voltage

Cited by 3 publications

References 13 publications

Thermal and magnetic properties of nanostructured densified ferrimagnetic composites with graphene - graphite fillers

Thermal and magnetic properties of nanostructured densified ferrimagnetic composites with graphene - graphite fillers

Design, Optimization, and Intelligent Control of Permanent-Magnet Contactor

Thermal and Magnetic Properties of Nanostructured Ferrimagnetic Composites with Graphene - Graphite Fillers

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