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Clarifying how DC bias fields affect the magnetic properties of soft magnetic composites (SMCs) plays a vital role in optimizing the material design of magnetic components. In this paper, composite SMCs composed of FeSi with high DC-bias performance and FeSiAl with low loss were fabricated using the phosphating process.
Therefore, researchers should pay more attention to the magnetic properties under the influence of the DC bias field. Due to their high saturation flux density (Bs) and good DC bias performance, gas-atomized FeSi SMCs are generally selected as cores of inductors or reactors for high-power applications in a large DC bias field.
The influence of FeSi content on the comprehensive magnetic properties of FeSiAl/FeSi SMCs in DC bias fields was investigated. The DC bias performance, saturation magnetic field and saturation flux density of samples are gradually enhanced with the content increase of FeSi with higher K, λ and Bs.
Obviously, a higher FeSi content gives rise to a larger Bs and corresponding saturation field strength. In other words, when the FeSi content increases, the anti-saturation ability of FeSiAl/FeSi SMCs is gradually enhanced, keeping the magnetization state away from saturation. This is why the sample with more FeSi owns better DC bias performance.
Meanwhile, special emphasis has been placed on the magnetic properties of SMCs with superimposing DC bias fields. The dependence of the SMCs’ magnetization state on the DC bias field and FeSi content, which can be revealed by Maxwell simulation, were found to be the key factors determining core loss.
This indicates that the DC bias field can obviously change the magnetization state of FeSiAl/FeSi SMCs. Meanwhile, the magnetization state can determine the core loss when samples are subjected to greater DC bias excitations.
However, DC bias can also cause CT saturation, and the resultant measurement errors may lead to relay mal-operation during steady states and through-faults. The impact of …
Due to the coupling effects of the compressive stress σ, DC bias magnetic field H dc, and excitation frequency f, it is challenging to directly determine the expressions for k h and k e. To address this issue, a symbolic …
By optimizing the CIP content and preparation process parameters, the composites with 25 wt% CIP compacted at 1200 MPa and heat treated at 500℃ has the …
Core Loss Under DC Bias Conditions C. A. Baguley, U. K. Madawala, and B. Carsten Department of Electronics and Computer Engineering,University of Auckland, Auckland 48 …
Block diagram of the dynamic model. ... Conference on Magnetism in 2003, for the 2DM in 2014, and for the Soft. ... We remark that the role of the DC bias, like the one imposed by the load in a ...
A maximum operation distance of 160mm is demonstrated with the DC magnetic field bias, 2.67 times of the maximum operation distance of the antenna without DC magnet …
The resulting SMCs demonstrated exceptional DC bias performance, achieving a power loss of 2629.50 kW/m 3 at a magnetic induction of 20 mT and a magnetic field …
The soft magnetic performances including frequency-dependent permeability, core loss, and DC-bias properties of the Fe-6.5 wt.%Si (FeSi) soft magnetic composites …
Applications of Forward Bias. Some of the most common appliactions of forward bias are: Rectification: Forward-biased diodes are essential in rectifiers, converting alternating …
Figure 2 shows the distribution of basic magnetization curve of power transformer core under the conditions of no DC bias and DC bias invasion. In the linear region …
In all amplifier circuit, the DC bias is provided by the voltage divider circuit of resistances R 1 and R 2 and emitter resistor R E provides stabilization. the value of R 1 and R 2 are such that the current through them is …
The relaxation phenomenon observed in the hysteresis loop with increasing frequency under a dynamic magnetic field explains the mechanism of power loss variation in soft magnetic …
Download scientific diagram | Simulation of permanent magnet biased DC inductor performing on AC by the use of thyristor switching arrangement. Top curve is voltage AC stimuli; Middle …
Here, the expressions for other voltages and currents are given as. Collector Feedback Bias. In this circuit (Figure 2), the base resistor R B is connected across the collector …
Under the rapid development of the power system, China has built a complex DC and AC hybrid transmission system. The scale of DC transmission system construction has gradually …
Abstract: In order to analyze the temperature rise of the transformer body under AC-DC conditions, this paper investigates the transformer losses under DC bias magnetism based on …
Clarifying how DC bias fields affect the magnetic properties of soft magnetic composites (SMCs) plays a vital role in opti-mizing the material design of magnetic components. In this paper, …
During operation, the converter transformer may experience DC bias, leading to increased vibration. In order to solve this problem, this paper comprehensively considers the …
magnetic field22). Theoretical analysis of the relaxation time under the applied DC bias magnetic field either perpendicularly (Fig. 1(a)) or parallel (Fig. 1(b)) to an AC magnetic field of low …
Download scientific diagram | DC bias magnetic field dependence of a DME and b CME coefficient loops and their phases of the layered composite at a frequency of 1 kHz from …
Transient DC bias current (TDCBC) is a design challenge for the DAB and PSFB converters due to the transient voltage imbalance applied to the transformer [].The effect of …
ARM is proportional to the DC bias field, therefore, it is frequently expressed as the susceptibility of ARM (χ ARM = ARM/DC bias field). The different behaviors of χ and ARM …
Figure 6 shows the direction of the magnetic field lines and the magnetic flux density distribution of the transformer core under the normal operation when the DC bias …
The function (widetilde{varPsi }) represents the double wavelet transform, which is equivalent to (varPsi ) in the case of orthogonality.. When the excitation current is …
The grades of domain refined high magnetic induction GO steels used for analysis of DC bias magnetic properties are shown in Table 1.The size of single sheet sample …
Download scientific diagram | Magnetostriction without and with a bias magnetic field. ... when a ≈6 Oe amplitude ac magnetic field and a ≈3 Oe dc magnetic bias field were applied. The ...
Permanent magnet bias magnetic bearing system is a closed-loop system composed of magnetic bearing stator body, magnetic bearing rotor, sensor and controller …
If we connect the positive terminal of a battery with the p-side of the diode and the negative terminal of the battery with the n-side of the diode, then the biasing is called …
The influence of FeSi content on the comprehensive magnetic properties of FeSiAl/FeSi SMCs in DC bias fields was investigated. The DC bias performance, saturation …