Analysis of Thrust and Core Loss of Linear Motor with Magnetic Powder Core

The Fe-Si-Al soft magnetic composites were produced by cold pressing of water-atomized Fe-Si-Al powder using organic binder. The effect of shaping pressure, annealing temperature, magnetic annealing and dielectric content on properties of Fe-Si-Al soft magnetic composites was investigated. The results showed that increasing shaping pressure increases density and radial crushing strength of Fe-Si-Al soft magnetic cores, and decreases coercivity and total loss. Increasing annealing temperature can increase effective permeability and decrease total loss owing to decreasing hysteresis loss, and over-annealing (＞660°C) can deteriorate magnetic properties. The magnetic annealing can decrease total loss of Fe-Si-Al magnetic powder core. Increasing dielectric content can reduce the eddy current loss of Fe-Si-Al magnetic powder core and decrease the real part of permeability. Fe-Si-Al magnetic powder core with shaping pressure of 1800 MPa, annealing temperature of 660 °C and dielelctric content of 0.7% presented the optimum magnetic properties with an effective permeability of 127, a total loss of 78mW/cm3 and a radial crushing strength of 18MPa.

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Three-dimension core loss analysis of transverse flux linear motor based on the improved Steinmetz equation

2017 Australasian Universities Power Engineering Conference (AUPEC) ◽

10.1109/aupec.2017.8282472 ◽

2017 ◽

Author(s):

Syed Q. Ali ◽

Hany M. Hasanien ◽

S. M. Muyeen

Keyword(s):

Core Loss ◽

Linear Motor ◽

Three Dimension ◽

Loss Analysis ◽

Transverse Flux

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Development of Low Iron Loss Soft Magnetic Powder Core

Journal of the Japan Society of Powder and Powder Metallurgy ◽

10.2497/jjspm.63.643 ◽

2016 ◽

Vol 63 (7) ◽

pp. 643-646 ◽

Cited By ~ 1

Author(s):

Hijiri TSURUTA ◽

Tomoyuki UENO ◽

Kouji YAMADA

Keyword(s):

Iron Loss ◽

Magnetic Powder ◽

Soft Magnetic ◽

Magnetic Powder Core

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Fe-6.5 wt%Si Powder Cores with Low Core Loss by Optimizing Particle Size Distribution

Metals ◽

10.3390/met10121699 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1699

Author(s):

JianJun Huang ◽

Lixin Jiao ◽

Yu Yang ◽

Yaqiang Dong ◽

Yiqun Zhang ◽

...

Keyword(s):

Particle Size ◽

Particle Size Distribution ◽

Size Distribution ◽

Effective Permeability ◽

Fine Particles ◽

Core Loss ◽

Eddy Current Loss ◽

Magnetic Powder ◽

Soft Magnetic ◽

Separation Density

The effect of different particle size distribution of Fe-6.5 wt%Si powder on the microstructure and soft magnetic properties of the corresponding soft magnetic powder cores (SMPCs) was investigated. By optimizing particle size distribution, the density of SMPCs increased and the total core loss significantly decreased. According to the result of loss separation, density of SMPCs is inversely proportional to hysteresis loss, while with increasing the content of the fine particles, the eddy current loss significantly decreased. It was found that with magnetic powder of particle size-grading as 10%, 10%, 60%, and 20% for particles with size between −75 to +38, −38 to +23, −23 to +13, and −13 μm, respectively, the Fe-6.5 wt%Si SMPCs exhibit optimal comprehensive magnetic performances with the effective permeability of about 60, the percent permeability at 100 Oe is up to 70%, and the lowest core loss of 553 mW/cm3.

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The Effect of Ball Milling on Magnetic Properties of Iron-Based Nanocrystalline Magnetic Powder Core

International Conference on Mechanical and Electrical Technology, 3rd, (ICMET-London 2011), Volumes 1–3 ◽

10.1115/1.859810.paper254 ◽

2012 ◽

pp. 1571-1575

Author(s):

Jian Tang ◽

Fa-Zeng Lian ◽

Cao-Wei Lu

Keyword(s):

Magnetic Properties ◽

Ball Milling ◽

Magnetic Powder ◽

Iron Based ◽

Magnetic Powder Core

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Eddy current loss evaluation of magnetic powder core based on electric and magnetic networks

AIP Advances ◽

10.1063/1.4978587 ◽

2017 ◽

Vol 7 (5) ◽

pp. 056678 ◽

Cited By ~ 3

Author(s):

Shigeru Konda ◽

Yukihiro Yoshida ◽

Osamu Ichinokura

Keyword(s):

Eddy Current ◽

Eddy Current Loss ◽

Magnetic Powder ◽

Current Loss ◽

Magnetic Powder Core

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Modelling and Measurement of a Moving Magnet Linear Motor for Linear Compressor

Energies ◽

10.3390/en13154030 ◽

2020 ◽

Vol 13 (15) ◽

pp. 4030

Author(s):

Xinwen Chen ◽

Hanying Jiang ◽

Zhaohua Li ◽

Kun Liang

Keyword(s):

Pressure Ratio ◽

Core Loss ◽

Cooling Capacity ◽

Linear Motor ◽

Element Analysis ◽

Linear Compressor ◽

Copper Loss ◽

Fea Model ◽

Motor Efficiency ◽

Moving Magnet

For the purpose of efficiency improvement, a linear motor that performs a linear reciprocating motion can be employed to directly drive the piston in a reciprocating refrigeration compressor without crankshaft mechanism. This also facilitates the modulation of cooling capacity as the stroke and frequency can be readily varied in response to heat load. A novel design of moving magnet linear motor for linear compressor was analyzed in the paper. A finite element analysis (FEA) model was built to simulate the characteristics of the linear motor. Current and displacement signals were measured from a test rig and were defined in the transient FEA model. Transient motor force was simulated with the FEA model and good agreements are shown between the results from the FEA model and interpolated shaft force from static force measurements. Major Losses, such as copper loss and core loss were also computed. Motor efficiency decreased from 0.88 to 0.83 as stroke increased from 9 mm to 12 mm, while the pressure ratio remained unchanged. Comparisons were made between the present moving magnet linear motor and moving coil linear motors. Generally, the moving magnet linear motor demonstrates higher efficiency than moving coil motors, which have significantly higher copper loss. The present moving magnet design with simple structure could be further optimized to improve motor efficiency.

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