Magnetic Composites in Electric Motors

Najgebauer, Mariusz; Szczygłowski, J.; Ślusarek, B.; Przybylski, Marek; Kaplon, Andrzej; Rolek, Jarosław

doi:10.1007/978-3-319-63949-9_2

Cited by 7 publications

(5 citation statements)

References 10 publications

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“…The properties of the polymer bonded magnets depend on the type of magnetic filler used, the polymer binder and the distribution of the filler [4].Magnetic composites with magnetically hard and soft fillers find applications in electrical machines due to their favorable mechanical, magnetic and physical properties. Electric motors are devices utilized to convert electrical energy to mechanical energy with high conversion efficiency [5]. One such application is a flywheel energy storage system (FESS), which utilizes an electrical machine that functions both as a motor and generator [6].…”

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confidence: 99%

Development and Characterization of Stable Polymer Formulations for Manufacturing Magnetic Composites

Nagarajan

Kamkar

Schoen

et al. 2020

JMMP

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Polymer bonded permanent magnets find significant applications in a multitude of electrical and electronic devices. In this study, magnetic particle-loaded epoxy resin formulations were developed for in-situ polymerization and material jetting based additive manufacturing processes. Fundamental material and process issues like particle settling at room temperature and elevated temperature curing, rheology control and geometric stability of the magnetic polymer during the thermal curing process are addressed. Control of particle settling, modifications in rheological behavior and geometric stability were accomplished using an additive that enabled the modification of the formulation behavior at different process conditions. The magnetic particle size and additive loading were found to influence the rheological properties significantly. The synergistic effect of the additive enabled the developing of composites with engineered magnetic filler loading. Morphological characterization using scanning electron microscopy revealed a homogenous particle distribution in composites. It was observed that the influence of temperature was profound on the coercive field and remanent magnetization of the magnetic composites. The characterization of magnetic polymers and composites using rheometry, scanning electron microscopy, X-ray diffraction and superconducting quantum interference device (SQUID) magnetometry analysis enabled the correlating of the behavior observed in different stages of the manufacturing processes. Furthermore, this fundamental research facilitates a pathway to construct robust materials and processes to develop magnetic composites with engineered properties.

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confidence: 99%

Development and Characterization of Stable Polymer Formulations for Manufacturing Magnetic Composites

Nagarajan

Kamkar

Schoen

et al. 2020

JMMP

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“…Advantages of magnetic composites include the ability to be produced with complicated shapes, high dimensional accuracy, and good mechanical, magnetic, and physical properties. Magnetic composites are divided into hard magnetic and soft magnetic composites [ 1 ]. Hard magnetic composites, also known as polymer bonded permanent magnets, find significant applications in motors, sensors and actuators in automation equipment and medical devices.…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of Field Structured Magnetic Composites

et al. 2021

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Polymer composites containing ferromagnetic fillers are promising for applications relating to electrical and electronic devices. In this research, the authors modified an ultraviolet light (UV) curable prepolymer to additionally cure upon heating and validated a permanent magnet-based particle alignment system toward fabricating anisotropic magnetic composites. The developed dual-cure acrylate-based resin, reinforced with ferromagnetic fillers, was first tested for its ability to polymerize through UV and heat. Then, the magnetic alignment setup was used to orient magnetic particles in the dual-cure acrylate-based resin and a heat curable epoxy resin system in a polymer casting approach. The alignment setup was subsequently integrated with a material jetting 3D printer, and the dual-cure resin was dispensed and cured in-situ using UV, followed by thermal post-curing. The resulting magnetic composites were tested for their filler loading, microstructural morphology, alignment of the easy axis of magnetization, and degree of monomer conversion. Magnetic characterization was conducted using a vibrating sample magnetometer along the in-plane and out-of-plane directions to study anisotropic properties. This research establishes a methodology to combine magnetic field induced particle alignment along with a dual-cure resin to create anisotropic magnetic composites through polymer casting and additive manufacturing.

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“…lower saturation induction), because of the content of dielectric binders. On the other hand, dielectric layers on powder grains reduce eddy currents, as well as corresponding power loss (Hultman and Jack, 2003; Périgo et al , 2011; Shokrollahi and Janghorban, 2007a; Shokrollahi and Janghorban, 2007b; Najgebauer et al , 2018). For this reason, the analysis of magnetic composite’s properties, such as saturation induction, permeability or power loss, is crucial in assessing their suitability for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Scaling algorithms in modelling of power loss in soft magnetic composites

Najgebauer

Szczygłowski

Ślusarek

et al. 2019

COMPEL

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Purpose The purpose of this paper is to examine scaling algorithms in the description and modelling of power loss in soft magnetic composites (SMCs). Design/methodology/approach Three scaling algorithms are examined to determine the most appropriate description of power loss in magnetic composites. The scaling coefficients are estimated in such a way that all measurement data should be collapsed onto a single curve, given in the scaled coordinates. The coefficient estimation is based on a non-linear optimization using the generalized reduced gradient method. The obtained formulae are then used in the power loss modelling. Findings It is revealed that only two-component formulae are suitable for the scaling analysis of power loss because these allow obtaining of the collapse of measurement data. Research limitations/implications This study considers just one type of SMC (Somaloy 700). Further research will be devoted to the verification of the scaling approach to the power loss modelling for other types of magnetic composites. Practical implications The power loss is a basic property of soft magnetic materials, which determines their practical applications. The scaling approach to the power loss modelling gives quite simple models that require a reduced number of measurement data to estimate coefficients. Originality/value The scaling algorithms can be a useful tool in the analysis and designing of magnetic circuits made of SMCs.

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Magnetic Composites in Electric Motors

Cited by 7 publications

References 10 publications

Development and Characterization of Stable Polymer Formulations for Manufacturing Magnetic Composites

Development and Characterization of Stable Polymer Formulations for Manufacturing Magnetic Composites

Development and Characterization of Field Structured Magnetic Composites

Scaling algorithms in modelling of power loss in soft magnetic composites

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