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The magnetoelastic deformations of soft and hard magnetic materials are evaluated by employing the body force calculating methods incorporating the virtual air-gap concept along with the finite-element method. By introducing the virtual air-gap scheme, we have recently developed generalized methods for calculating body force field such as the generalized magnetic charge force density method, the g...Show More
The paper presents some aspects of soft magnetic composite (SMC) material application in electrical machines. The stator core of the analyzed permanent magnet synchronous motor (PMSM) is made of magnetic iron sheets. Three types PMSM stators are analyzed: laminated with open slots, laminated with closed slots using SMC, and SMC stators. The comparative analysis is based on the magnetic properties ...Show More
The aim of this paper is to compare the properties of cores designed for medium voltage current transformers. The cores were made of SiFe, NiFe polycrystalline strips, and nanocrystalline strips. The properties of cores combined of two different soft magnetic materials, i.e., grain-oriented electrical steel SiFe and NiFe polycrystalline strip (SiFe+NiFe) or grain-oriented electrical steel and Fe-b...Show More
This paper presents a 3-Dimensional (3-D) magnetic property model of soft magnetic composite material called the Della Torre, Pinzaglia and Cardelli (DPC) Model. We verify the DPC model with 3-D magnetic property experiments. Moreover, we improve the identification method according to the experimental data instead of the computed one.Show More
This paper investigates the simultaneous compaction of soft magnetic composite materials and permanent magnet powders together. The final target is the construction of multilayer magnetic blocks, which can be used for various applications, specifically in electrical machines. This approach provides more freedom to build special electrical machines with very complex magnetic structures. In fact, mu...Show More
This paper presents the design and prototyping of low-cost analog circuitry to characterize the ac magnetization profile of soft magnetic materials. Soft magnetic materials prepared as ring cores are wound with equal number of turns for the primary and secondary windings. The primary winding is excited with sinusoidal supply of varying voltage amplitude. The secondary winding is interfaced with th...Show More
This article analyzes the magnetization rotation behavior of Fe-based soft magnetic materials and soft magnetic composites (SMMs and SMCs, respectively) samples. Room temperature measurements of the complex permeability until frequencies near 20 MHz and isothermal M(H) magnetization curves obtained from room to low temperatures (down to 20 K) show very similar soft magnetic behavior for both type ...Show More
A new application in measuring the coercivity of a soft magnetic material (nanocrystalline alloy, lk107) by atomic magnetometer based on pump-probe nonlinear magneto-optical rotation is proposed. The magnetization states of the soft magnetic sample magnetized or demagnetized by a pulse current are successfully measured after the magnetizing current being closed. The hysteresis loops with good repe...Show More
Past decade has seen significant development in the field of Soft magnetic composite (SMC) materials and their application in electrical machines. This is due to their advantageous nature, isotropic magnetic and thermal properties as well as low eddy current loss specifically at medium and higher frequencies. SMC has opened the arena for innovative electrical machine designs with three-dimensional...Show More
In this paper, first we present the structure and fabrication of a new linear actuator made of Soft Magnetic Composite material with mechanical springs. Next we study the simulation model of the linear actuator, and the simulation result is given and compared with the experimental result. The calculated result corresponds with the measured one well.Show More
The paper proposes an overview of traditoional and some specific applications, of nanocrystalline and amorphous soft magnetic materials with different types of hysteresis loops. The basic requirements for the magnetic materials are given and the advantages of the specific applications are explained. A comparison between the traditional and specific applications of nanocrystalline and amorphous sof...Show More
This work deals with the investigation on the anisotropy of soft magnetic materials. The particular focus is on measuring the material properties for different magnetization angles by utilizing a 2D measurement setup with a disc-shaped specimen. Thereby, the material properties are determined for different magnetization angles and compared with each other. Based on the measurement results, it is s...Show More
Magnetic properties and fine structure of Fe-Si-B-P-Cu nanocrystalline alloy ribbons have been investigated. The Fe84.8(Si,B,P)14Cu1.2 alloy ribbons using industrial materials are produced by a single-roller melt-spinning method in air. The Fe84.8(Si,B,P)14Cu1.2 nanocrystalline alloys exhibit low coercivity Hc of 7-20 A/m in the compositional range of Si=0-2 at% and P=2-8 at% and high saturation m...Show More
The methodology presented in this paper is using a modeling approach based on the observation of the real microscopic material structure to predict the global macroscopic magnetization curve of the soft magnetic composites (SMCs) materials. It can be used to investigate the influence of the variability of all parameters of the microstructure on the global macroscopic magnetization curve of the equ...Show More
This paper deals with results on preparation and magnetic characterization over a wide frequency range of (Fe,Co,Ni)/sub 70/Nb/sub 10/B/sub 20/ new bulk amorphous and nanocomposite alloys. Their structure is either fully amorphous or consisting of very fine 5-10 nm /spl alpha/-Fe(Co) particles dispersed within the amorphous matrix. Saturation inductions of about 0.85 T, relative permeabilities of ...Show More
Amorphous and nanocrystalline magnetic cores allow lighter, smaller and more energy efficient designs of many industrial high frequency applications such as: adjustable speed drives (ASD), invertors, uninterruptible and switched-mode power supply (UPS and SMPS). The aim of this paper is to present a complex comparison between two soft magnetic materials, frequently used in electromagnetic devices,...Show More
A key property for high-frequency inductive applications is the magnetic softness, ideally characterized by complete reversibility of the hysteresis curve. Magnetic softness of alloys depends on the dimensional ratio of grain size to the correlation length. The random anisotropy model predicts the optimum magnetic softness if the crystallite size is well below the correlation length. Based on this...Show More
Soft magnetic materials play an important role in broad applications, such as transformers and electrical motors. There is an interest in Soft magnetic composites (SMC) materials because of the demand for miniaturization of cores for power electronic applications, transformers, stators and rotors of electromotors. Soft magnetic composites, which are used in electromagnetic applications, can be des...Show More
A factorable Preisach distribution function is a reasonable assumption in modeling soft magnetic materials. With this assumption it is possible to define and employ a single-input Preisach function for easier implementation and identification of a scalar Preisach model. On the basis of this simplification, we developed a new method for identification and implementation of the isotropic vector Prei...Show More
Soft magnet devices have a wide variety of applications in aerospace, military, and industrial sectors. Generally, devices used in industrial applications are required to operate satisfactorily under ambient temperatures of +10 degC to +50 degC under normal pressure, whereas those used in aerospace and military applications will face a wider range of temperatures from -60 degC to +80 degC and gene...Show More
High-saturation magnetic flux density and low iron loss soft magnetic materials as passive components in modern power-electronics systems has attracted much attention due to the compelling global demand of carbon neutrality. For this purpose, many elemental studies on iron loss have been undergone, such as multi-dimensional iron loss map, iron loss component analysis, broad-band iron loss measurem...Show More
This paper proposes a new variable field wind generator with soft magnetic composite material and the basic theories were presented. Basically, the overlapping of the two magnetic fields is applied to its machine operation. The fundamental theory of the new wind generator is the same as traditional generators. Its bias of magnetic fields and two stator partitions increase iron and copper losses. S...Show More
Magnetic properties of some nanocrystalline soft magnetic alloys are evaluated by means of a model obtained from literature. The influence of alloy elements in grain diameter, crystalline fraction and anisotropies are investigated in order to obtain information for the design of nanocrystalline soft magnetic materials. The study concerns materials with nanocrystalline composition of Fe, Fe-Si, Fe-...Show More
Fe-Si-B-P-Cu-C nanocrystalline alloys are soft magnetic materials with high saturation magnetic flux density and low loss. Since the magnetic properties change depending on the heat treatment conditions, there has been interested in the close correlation between the heat treatment meathod and the magnetic property. In order to obtain excellent magnetic properties, it is important to derive the opt...Show More
Soft magnetic cores are the core components of fluxgate sensors, and the performance of fluxgate sensors is limited due to the general foreign embargo of ultra-thin ultra-fine cobalt-based amorphous materials. To address these problems, this paper establishes a parametric model of high-performance magnetic cores and prepares the cores in terms of composition design and heat treatment process. The ...Show More