Scaling of Minor Hysteresis Loops in Soft Magnetic Amorphous Alloy

2018 ◽  
Vol 792 ◽  
pp. 3-7
Author(s):  
Vladimir Tsepelev ◽  
Yuri Starodubtsev ◽  
Nadezhda Tsepeleva ◽  
Kai Ming Wu ◽  
Ke Lin Zhang ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
Hysteresis Loops ◽  
Initial Permeability ◽  
Maximal Growth ◽  
Soft Magnetic ◽  
Weak Magnetic Fields ◽  
Good Accordance ◽  
Analytical Expressions ◽  
Minor Hysteresis Loops ◽  
Very High

Scaling of minor hysteresis loops in the amorphous alloy Co66Fe3Cr3Si15B13with a very high initial permeability (more than 150000) and low coercivity (about 0.1 А/m) has been studied. In weak magnetic fields and in the region of maximal growth of permeability a similarity of minor loops was detected. Analytical expressions for hysteresis losses are derived which provide a good accordance of calculations with the results of measurements.

DIAGNOSTICS OF AMORPHOUS ALLOY MAGNETIC PROPERTIES AFTER THERMOMAGNETIC PROCESSING

2019 ◽  
pp. 30-37
Author(s):  
V. Yu. Vvedensky ◽  
G. A. Nuzhdin ◽  
S. V. Frolov ◽  
A. A. Gavrilov
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloy ◽  
Coercive Force ◽  
Magnetic Permeability ◽  
Hysteresis Loops ◽  
Soft Magnetic Materials ◽  
Magnetic Characteristics ◽  
Soft Magnetic ◽  
Low Field ◽  
Small Times

Hysteresis magnetic properties formation and plasticity of Fe&Co-based amorphous alloy tapes (brand 30KCP, the Fe–Co–Si–B system) for improvement increase in its properties and ensuring its competitive application on the control basis have been investigated. In researches magnetomeasuring installation have been used. It is intended for automatic magnetic characteristics measurement of soft magnetic materials ring samples by GOST 8.377 techniques. Defined degree of a flexural tension relaxation when annealing tapes. It was established that even at five-minute annealing at a temperature of 360 °C processes of a relaxation manage to take place almost completely. Further change in time of parameter of a relaxation is insignificant. The received dependences of magnetic characteristics on time of thermomagnetic processing at the enclosed field of 10 A/m and their comparison with usual annealing showed that coercive force changes on the same types of curves with insignificant deviations. After thermomagnetic processing in the enclosed field of 21 A/m coercive force in big fields increased approximately by 30 %, in small Hc failure observed around 5 … 15 min of processing as well as Br values increased. This observed result is very interesting in terms of magnetic reversal processes. The lack of stabilization mobile 180° domains borders, at simultaneous course stabilization 90° borders, is reflected in the form of recession of residual induction and growth of magnetic permeability. It is shown that thermomagnetic processing of amorphous alloy of brand 30KCP in not sating longitudinal field with small times of endurance 5…15 min at 360 °C leads to the drawn hysteresis loops, the lowered squareness of hysteresis loops and high values of low-field magnetic permeability 10.

NILOMAG 77

Alloy Digest ◽  
1995 ◽  
Vol 44 (10) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Initial Permeability ◽  
Magnetic Alloy ◽  
Soft Magnetic ◽  
Soft Magnetic Alloy ◽  
High Level

Abstract NILOMAG ALLOY 77 is a 77 Ni soft magnetic alloy with a high level of initial permeability. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on heat treating. Filing Code: Ni-488. Producer or source: Inco Alloys International Inc.

MUMETAL

Alloy Digest ◽  
1991 ◽  
Vol 40 (12) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Magnetic Alloy ◽  
High Permeability ◽  
Soft Magnetic ◽  
Soft Magnetic Alloy ◽  
Very High ◽  
Specialty Metals

Abstract MUMETAL is a very high permeability soft magnetic alloy. (See also Alloy Digest Ni-25, April 1956.) This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on heat treating. Filing Code: Ni-398. Producer or source: Spang Specialty Metals.

Influence of Magnetoelastic Anisotropy on Properties of Nanostructured Microwires

2013 ◽  
Vol 646 ◽  
pp. 59-66 ◽  
Author(s):  
Arcady Zhukov ◽  
Margarita Churyukanova ◽  
Lorena Gonzalez-Legarreta ◽  
Ahmed Talaat ◽  
Valentina Zhukova ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Hysteresis Loops ◽  
Magnetic Behaviour ◽  
Soft Magnetic ◽  
Magnetoelastic Anisotropy ◽  
Thermal Expansion Coefficients ◽  
Magnetoelastic Energy ◽  
Expansion Coefficients ◽  
The Difference ◽  
Magneto Resistance

We studied the effect ofthe magnetoelastic ansitropy on properties of nanostructured glass-coated microwires with soft magnetic behaviour (Finemet-type microwires of Fe70.8Cu1Nb3.1Si14.5B10.6, Fe71.8Cu1Nb3.1Si15B9.1 and Fe73.8Cu1Nb3.1Si13B9.1 compositions) and with granular structure (Cu based Co-Cu microwires). The magnetoelastic energy originated from the difference in thermal expansion coefficients of the glass and metallic alloy during the microwires fabrication, affected the hysteresis loops, coercivity and heat capacity of Finemet-type microwires. Hysteresis loops of all as-prepared microwires showed rectangular shape, typical for Fe-rich microwires. As expected, coercivity, HC, of as-prepared microwires increases with decreasing of the ratio ρ defined as the ratio between the metallic nucleus diameter, d to total microwire diameter, D. On the other hand we observed change of heat capacity in microwires with different ratio ρ. In the case of Co-Cu microwires ρ- ratio affected the structure and the giant magneto-resistance of obtained microwires.

scholarly journals Instantaneous Electromagnetic Torque Components in Synchronous Motors Fed by Load-Commutated Inverters

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3223
Author(s):  
Gabriel Ekemb ◽  
Fouad Slaoui-Hasnaoui ◽  
Joseph Song-Manguelle ◽  
P. M. Lingom ◽  
Issouf Fofana
Keyword(s):  
High Efficiency ◽  
Air Gap ◽  
International Standards ◽  
Synchronous Motors ◽  
Gas Compression ◽  
Variable Frequency Drives ◽  
Torsional Analysis ◽  
Analytical Expressions ◽  
Very High ◽  
Excitation Circuit

This paper proposes time-domain analytical expressions of the instantaneous pulsating torque components in a synchronous machine air gap when supplied by a load-commutated-inverter (LCI) system. The LCI technology is one of the most used variable frequency drives when very high power and low speed are required in applications such as pipeline recompression and decompression, as well as liquefied natural gas compression. In such applications, synchronous motors are used because of their high efficiency resulting from a separated supply of the current to their rotor through the excitation circuit. These applications usually have long and flexible shafts, which are very sensitive to torsional vibration excitation when their natural frequencies interact with any external torque applied to the shaft. A torsional analysis is required by international standards to assess the survivability of the shaft through the overall speed range of the motor. Therefore, the magnitude and frequencies of the motor air-gap torque are needed for such evaluation. The proposed developments are supported by numerical simulations of LCI systems in a large range of operation range. From the simulation results, torque harmonic families are derived and expressed in a parametric form, which confirm the accuracy of the proposed relationships.

Soft magnetic properties of the Fe72Co10Nb6B12 amorphous alloy

2006 ◽  
Vol 423 (1-2) ◽  
pp. 77-80 ◽  
Author(s):  
A. Chrobak ◽  
G. Haneczok ◽  
P. Kwapuliński ◽  
D. Chrobak ◽  
Z. Stokłosa ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloy ◽  
Soft Magnetic Properties ◽  
Soft Magnetic

scholarly journals Optimization of Magnetic Properties of Magnetic Microwires by Post-Processing

Processes ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 1006
Author(s):  
Valentina Zhukova ◽  
Paula Corte-Leon ◽  
Lorena González-Legarreta ◽  
Ahmed Talaat ◽  
Juan Maria Blanco ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Chemical Composition ◽  
Hysteresis Loops ◽  
Structural Features ◽  
Post Processing ◽  
Soft Magnetic ◽  
Magnetic Microwires ◽  
Prepared State ◽  
Induced Magnetic Anisotropy ◽  
Selection Of

The influence of post-processing conditions on the magnetic properties of amorphous and nanocrystalline microwires has been thoroughly analyzed, paying attention to the influence of magnetoelastic, induced and magnetocrystalline anisotropies on the hysteresis loops of Fe-, Ni-, and Co-rich microwires. We showed that magnetic properties of glass-coated microwires can be tuned by the selection of appropriate chemical composition and geometry in as-prepared state or further considerably modified by appropriate post-processing, which consists of either annealing or glass-coated removal. Furthermore, stress-annealing or Joule heating can further effectively modify the magnetic properties of amorphous magnetic microwires owing to induced magnetic anisotropy. Devitrification of microwires can be useful for either magnetic softening or magnetic hardening of the microwires. Depending on the chemical composition of the metallic nucleus and on structural features (grain size, precipitating phases), nanocrystalline microwires can exhibit either soft magnetic properties or semi-hard magnetic properties. We demonstrated that the microwires with coercivities from 1 A/m to 40 kA/m can be prepared.

scholarly journals An Analysis of Minor Hysteresis Loops Behavior under PWM Voltage - Electromagnetic Device at No-Load and Loaded Conditions

2021 ◽  
Vol 20 (4) ◽  
pp. 745-762
Author(s):  
Ricardo de A. Elias ◽  
Carlos A. C. Wengerkievicz ◽  
Guilherme H. Souza Reis ◽  
Nelson Sadowski ◽  
Nelson J. Batistela ◽  
...  
Keyword(s):  
Hysteresis Loops ◽  
Electromagnetic Device ◽  
Minor Hysteresis Loops
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