Soft magnetic composite materials (SMCs)

Shokrollahi, H.; Janghorban, K.

doi:10.1016/j.jmatprotec.2007.02.034

Cited by 887 publications

(326 citation statements)

References 55 publications

(25 reference statements)

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“…One of the ways to prepare bulk material is compaction of powder produced by milling of amorphous or nanocrystalline ribbons [2]. Soft magnetic composites (SMCs) are typically produced by powder processing methods, allowing a net-shape production for a wide variety of shapes and sizes [3]. Magnetic powder parts are produced from powder particles each covered by insulating coatings, which cause a barrier to particle-to-particle eddy current paths under ac magnetization hence minimizing eddy current losses.…”

Section: Introductionmentioning

confidence: 99%

Iron Based Soft Magnetic Compacted Materials

Füzer

Füzerová²,

Kollář³

et al. 2013

Acta Electrotechnica Et Informatica

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Section: Introductionmentioning

confidence: 99%

Iron Based Soft Magnetic Compacted Materials

Füzer

Füzerová²,

Kollář³

et al. 2013

Acta Electrotechnica Et Informatica

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“…[1][2][3] The isotropic magnetic property bring crucial benefits for electromagnetic devices as the magnetic flux path in the devices can be three dimensional (3-D), and hence different topologies can be exploited to obtain high performances. 4 Typical application of SMC materials are claw pole and transverse flux machines, in which 3-D magnetic flux density improve performance and simplify the machine structure.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional magnetic properties of soft magnetic composite material at different frequencies

Li¹,

Lin²,

Liu³

et al. 2011

Journal of Applied Physics

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2Due to the intrinsic isotropic magnetic properties, soft magnetic composite (SMC) materials are applied in electrical machines in which the magnetic energy can be transported in three dimensional (3-D). However, in real application, complicated magnetic properties, such as anisotropy and nonlinearity, are found, in particular, at the high frequency range. This paper studies the 3-D magnetic properties of SMC materials under complicated magnetization, such as circular, elliptical, and spherical excitations. The magnetic flux density vector B loci and magnetic field strength vector H loci and core losses at magnetization frequencies ranged from 50 Hz to 1000 Hz were measured and discussed using an improved 3-D testing system. Experimental results show that rotational core losses are greater than alternating losses at the same magnitude of flux density. In addition, rotational loss increases sharply after saturation point, but it is not observed in alternating loss.3

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“…In order to manufacture the bearing stator in the most compact way possible with the most complete insulation against stator-based eddy currents, the core is fabricated from Soft Magnetic Composite (SMC). A good overview of the properties and uses of SMCs is provided by Shokrollahi and Janghorban (2007), and a specific example of their use in a magnetic bearing application made by Hofmann (2011, 2015). A brass touchdown disk is mounted adjacent to the magnetic bearing to protect it in the event of excessive vibration or instability.…”

Section: Test Rigmentioning

confidence: 99%

Vibration reduction in a hollow-shaft rotor using flexibly-mounted internal-stator magnetic bearings

Lusty

Keogh

2017

Mechanical Engineering Journal

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A topology composed of a hollow-shaft rotor on rolling element bearings coupled with internal-stator magnetic bearings mounted on independently supported flexible shafts is considered for the purposes of vibration reduction. Details of a bespoke test rig constructed to assess this topology are presented. The rig makes use of customdesigned internal-stator magnetic bearings fabricated from Soft Magnetic Composite material. Results from standard numerical analysis of the rig are given to demonstrate the expected behaviour of the system, with a particular focus on its potential to reduce synchronous vibration seen in the rotor while passing critical speeds. These behaviours are then confirmed via a series of experimental tests. These results show that the proposed topology can be used effectively to alter the system vibration behaviour.

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Soft magnetic composite materials (SMCs)

Cited by 887 publications

References 55 publications

Iron Based Soft Magnetic Compacted Materials

Iron Based Soft Magnetic Compacted Materials

Three-dimensional magnetic properties of soft magnetic composite material at different frequencies

Vibration reduction in a hollow-shaft rotor using flexibly-mounted internal-stator magnetic bearings

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