The Simulation of Soft Magnetic Materials’ Shielding Characteristic in the near Field Communication System

2013 ◽  
Vol 668 ◽  
pp. 715-718
Author(s):  
Yi Zeng ◽  
Shuo Qing Yan ◽  
Qi Fan Li ◽  
Ze Kun Feng ◽  
Jie Wu ◽  
...  
Keyword(s):  
Magnetic Material ◽  
Resonance Frequency ◽  
Magnetic Materials ◽  
Communication System ◽  
Simulation Analysis ◽  
Near Field ◽  
Soft Magnetic Materials ◽  
Near Field Communication ◽  
Soft Magnetic ◽  
Coil Antenna

A square coil antenna with a resonance frequency of 13.56MHz was proposed. Simulation analysis has been made to evaluate how the soft magnetic materials’ dimensions and the real part of permeability affect the shielding performance. The results show that the soft magnetic material with a larger or thicker dimension or with a higher real part of permeability has a better performance in shielding metals.

Loss Separation Model: A Tool for Improvement of Soft Magnetic Materials

2016 ◽  
Vol 869 ◽  
pp. 596-601 ◽  
Author(s):  
Marcos Flavio de Campos
Keyword(s):  
Magnetic Material ◽  
Magnetic Materials ◽  
High Frequency ◽  
Eddy Currents ◽  
Soft Magnetic Materials ◽  
Barkhausen Noise ◽  
Magnetic Barkhausen Noise ◽  
Soft Magnetic ◽  
Physical Reasoning ◽  
Separation Model

Loss separation has fundamental importance for optimizing the magnetic material for a given frequency of operation. The loss separation model assumes the existence of two main terms: one due to the hysteresis at the quasi-static situation with frequency less than 0.01 Hz and another dynamic, due to high frequency eddy currents. In this study, it is discussed the physical reasoning behind the loss separation model. Magnetic Barkhausen Noise can be a valuable tool for better understanding the physics of loss separation.

Fe-P Soft Magnetic Properties of Iron for A.C. Applications

2012 ◽  
Vol 585 ◽  
pp. 289-293
Author(s):  
S.K. Chaurasia ◽  
Ujjwal Prakash ◽  
P.S. Misra ◽  
K. Chandra
Keyword(s):  
Magnetic Material ◽  
Magnetic Properties ◽  
Magnetic Materials ◽  
High Frequency ◽  
Eddy Current Loss ◽  
Soft Magnetic Materials ◽  
Soft Magnetic Properties ◽  
Wide Spread ◽  
Soft Magnetic ◽  
Final Density

Silicon steels and ferrites dominate soft magnetic materials. However, Soft magnetic materials using powder metallurgical techniques are gaining wide spread use in motor, compressors and other rotating devices. High-density Fe-P soft magnetic materials have been developed using hot powder forging route. It was observed that phosphorous addition (ranging from 0.30P-0.80P) enhances the soft magnetic properties of iron for AC applications. This new soft magnetic material offers many manufacturing advantages. Because of its low eddy current loss, it has good high frequency magnetic properties comparable to other soft magnetic materials. Also, it has been observed that phosphorous addition improves the final density of the resulting product.

Design of Composite Electromagnetic Wave Absorber Made of Soft Magnetic Materials Dispersed and Isolated in Polystyrene Resin

2008 ◽  
Vol 388 ◽  
pp. 257-260 ◽  
Author(s):  
Kenji Sakai ◽  
Yoichi Wada ◽  
Shinzo Yoshikado
Keyword(s):  
Magnetic Material ◽  
Electromagnetic Wave ◽  
Magnetic Materials ◽  
Soft Magnetic Materials ◽  
Soft Magnetic Material ◽  
Complex Permeability ◽  
Frequency Range ◽  
Soft Magnetic ◽  
Mixture Ratio ◽  
Polystyrene Resin

Composite electromagnetic wave absorbers made of a soft magnetic material (permalloy or sendust) and polystyrene resin were investigated [1]. The volume mixture ratio of magnetic material was varied in the range from 18 vol% to 75 vol%. The composites with the low volume mixture ratio of soft magnetic material absorbed more than 99 % of electromagnetic wave power in the frequency range from 1 GHz to 10 GHz. The values of the real part r’ of the relative complex permeability r * for both magnetic materials were less than unity at frequencies above approximately 6 GHz as the volume mixture ratio of magnetic material increased. This result suggests the possible realization of an electromagnetic wave absorber that can operate above 10 GHz.

Modeling of the Temperature Dependence of Soft Magnetic Materials

2020 ◽  
Author(s):  
Gereon Goldbeck ◽  
Gerd Bramerdorfer ◽  
Wolfgang Amrhein ◽  
Josef Hinterdorfer ◽  
Bernhard Weis
Keyword(s):  
Temperature Dependence ◽  
Magnetic Materials ◽  
Soft Magnetic Materials ◽  
Soft Magnetic

scholarly journals Effect of the Temperature on the Magnetic and Energetic Properties of Soft Magnetic Composite Materials

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4400
Author(s):  
Luca Ferraris ◽  
Fausto Franchini ◽  
Emir Pošković ◽  
Marco Actis Grande ◽  
Róbert Bidulský
Keyword(s):  
Magnetic Materials ◽  
Eddy Currents ◽  
Electrical Machines ◽  
Soft Magnetic Materials ◽  
Magnetic Composite ◽  
Soft Magnetic ◽  
Soft Magnetic Composite ◽  
Magnetic Performance ◽  
Magnetic Circuits ◽  
Energetic Characterization

In recent years, innovative magnetic materials have been introduced in the field of electrical machines. In the ambit of soft magnetic materials, laminated steels guarantee good robustness and high magnetic performance but, in some high-frequency applications, can be replaced by Soft Magnetic Composite (SMC) materials. SMC materials allow us to reduce the eddy currents and to design innovative 3D magnetic circuits. In general, SMCs are characterized at room temperature, but as electrical machines operate at high temperature (around 100 °C), an investigation analysis of the temperature effect has been carried out on these materials; in particular, three SMC samples with different binder percentages and process parameters have been considered for magnetic and energetic characterization.

Sign in / Sign up

Export Citation Format

Share Document