Effects of processed parameters on the magnetic performance of a powder magnetic core

Xie, Ding-Zhou; Lin, Kuan‐Hong; Lin, Shun‐Tian

doi:10.1016/j.jmmm.2013.10.014

Cited by 61 publications

(9 citation statements)

References 20 publications

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“…Several insulating materials have been used to coat powder particles, including silicone resins [ 3 ], phosphates [ 4 , 5 , 6 , 7 ], silicate glasses [ 8 , 9 ], magnesium oxide [ 10 ], aluminum oxide [ 11 , 12 , 13 ], ferrites [ 14 , 15 , 16 ], sodium salts [ 17 , 18 ], and silica [ 19 , 20 , 21 , 22 , 23 ]. A homogeneous and thin layer can be realized by using silicone resin or phosphate, because these materials undergo chemical reactions with the particle surface.…”

Section: Introductionmentioning

confidence: 99%

Improving Powder Magnetic Core Properties via Application of Thin, Insulating Silica-Nanosheet Layers on Iron Powder Particles

et al. 2016

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A thin, insulating layer with high electrical resistivity is vital to achieving high performance of powder magnetic cores. Using layer-by-layer deposition of silica nanosheets or colloidal silica over insulating layers composed of strontium phosphate and boron oxide, we succeeded in fabricating insulating layers with high electrical resistivity on iron powder particles, which were subsequently used to prepare toroidal cores. The compact density of these cores decreased after coating with colloidal silica due to the substantial increase in the volume, causing the magnetic flux density to deteriorate. Coating with silica nanosheets, on the other hand, resulted in a higher electrical resistivity and a good balance between high magnetic flux density and low iron loss due to the thinner silica layers. Transmission electron microscopy images showed that the thickness of the colloidal silica coating was about 700 nm, while that of the silica nanosheet coating was 30 nm. There was one drawback to using silica nanosheets, namely a deterioration in the core mechanical strength. Nevertheless, the silica nanosheet coating resulted in nanoscale-thick silica layers that are favorable for enhancing the electrical resistivity.

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Section: Introductionmentioning

confidence: 99%

Improving Powder Magnetic Core Properties via Application of Thin, Insulating Silica-Nanosheet Layers on Iron Powder Particles

et al. 2016

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“…Or can also be calculated from the total loss of the motor as in the following formula. 100% x Pout) (Pin / = eff (1) loss) (power -Pin = Pout (2) Where, Pin (Watts) is the input power and Pout (Watts) is the output power of the electric motor. Power loss is the total power loss found in electric motors.…”

Section: Electric Motor Simulationmentioning

confidence: 99%

“…Purity and Fe content affect the magnetic properties, such as the value of coercivity field and magnetic permeability values. The higher the value of purity and content of the womb, then the value of the magnetic permeability will also be higher [2]. The soft-magnetic material has a permeability value saturation induction higher than the hard magnetic materials, but it has a coercivity value which is comparatively lower than the hard-magnetic material [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of core manufacture process for electric motor efficiency

Nizam¹,

Anwar²,

Hery³

et al. 2017

AIP Conference Proceedings

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Magnetic characterization of the stator core of a high-speed motor made of an ultrathin electrical steel sheet using the magnetic property evaluation system AIP Advances 8, 047603 (2018) Abstract. In this study, radial BLDC motor is the object of research. The study focused on stator core material to improve electric motor performance by replacing the laminate material with a composite material powder. The use of composite material powder for wound core material is to simplify the manufacturing process with efficiency equal or close. Wound core material was tested by using VSM, the test is intended to determine electromagnetic properties of materials. The process of preparation of the sample is done by using pressure variations. The result of electromagnetic properties of the material is in the form of remanence, permeability, and coercivity. The result of the electromagnetic character of the material is then used as input material properties of the core windings for simulation. From the simulation results obtained performance electric motors. The effect of using different wound core to the efficiency of the motor is then compared. From the study, it can be concluded that by replacing the core material obtained efficiency of the motor windings are nearing a conventional motor. Excellence wound core materials that use composite powder is the ease in the manufacturing process.

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“…[3][4][5] Therefore, the electrical insulation coating formed on the surface of the magnetic powders is the paramount feature of the SMCs technology for increasing electrical resistivity and reducing core loss. [6][7][8] Electrical insulation coatings for the SMCs are generally divided into three categories: organic, inorganic, and organicinorganic hybrid coatings. The organic coatings provide satisfactory adhesion to the powders; however, most of them including epoxy and silicone resins have poor thermal stability annealed at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Enhanced soft magnetic properties of iron powders through coating MnZn ferrite by one-step sol–gel synthesis*

Liu¹,

Gao²,

Jin³

et al. 2019

Chinese Phys. B

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The MnZn ferrite coating formed on the surface of iron-based soft magnetic powders via facile and modified sol–gel process has been fabricated to obtain better magnetic performance due to its higher permeability compared with traditional nonmagnetic insulation coatings. The influence of the MnZn ferrite contents on the magnetic performance of the soft magnetic composites (SMCs) has been studied. As the MnZn insulation content increases, the core loss first experiences a decreasing trend that is followed by progressive increase, while the permeability follows an increasing trend and subsequently degrades. The optimized magnetic performance is achieved with 2.0 wt% MnZn ferrite, which results from the decrement of inter-particle eddy current losses based on loss separation. A uniform and compact coating layer composed of MnZn ferrite and oxides with an average thickness of 0.38 ± 0.08 μ m is obtained by utilizing ion beam technology, and the interface between the powders and the coating shows satisfied adhesiveness compared with the sample directly prepared by mechanical mixing. The evolution of the coating layers during the calcination process has been presented based on careful analysis of the composition and microstructure.

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Effects of processed parameters on the magnetic performance of a powder magnetic core

Cited by 61 publications

References 20 publications

Improving Powder Magnetic Core Properties via Application of Thin, Insulating Silica-Nanosheet Layers on Iron Powder Particles

Improving Powder Magnetic Core Properties via Application of Thin, Insulating Silica-Nanosheet Layers on Iron Powder Particles

Effect of core manufacture process for electric motor efficiency

Enhanced soft magnetic properties of iron powders through coating MnZn ferrite by one-step sol–gel synthesis*

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