Magnetic core model

Guerra, Francisco; Mota, W.S.

doi:10.1049/iet-smt:20060054

Cited by 20 publications

(9 citation statements)

References 14 publications

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“…9 (c)) to be Vsig_max=+4 V and Vsig_min=-4 V. And as shown in Fig. 9 (c), with R4=51 KΩ, R5=47 KΩ, D1 and D2 using the precision Zener diode IN5226 produced by Motorola, the thresholds can be uniquely determined by (19).…”

Section: B Circuits Design For the Optimized Rtd Methodsmentioning

confidence: 99%

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Performance Degradation Effect Countermeasures in Residence Times Difference (RTD) Fluxgate Magnetic Sensors

Zhang

Shi

et al. 2019

IEEE Sensors J.

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This paper aims to explore the detection defect of residence times difference (RTD) fluxgate working in low-power mode. It presents the countermeasures for sensor resolution improvement and linearity enhancement. The main defects are amplitude and symmetry changes induced in the output spikes of fluxgate probe due to the magnetic field. These defects lead to thresholds deviation and asymmetry, then causes severe performance degradation especially on detection resolution and linearity according to the RTD theory. To overcome such effects, the optimized RTD method based on voltage extraction and feedback technology is proposed to implement magnetic field compensation and achieve a zero-field running regime of the RTD fluxgate. In this regard, the sensor linearity is improved by a factor of 38, and the resolution degradation effect is suppressed more than 6 times, verified by the laboratory experiments. The optimized detection method proposed in this paper demonstrated a great potential to achieve lower power consumption, will make the RTD fluxgate more promising technology among bio-magnetic applications.

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Section: B Circuits Design For the Optimized Rtd Methodsmentioning

confidence: 99%

“…1 (a) is the key theoretical support of fluxgate design. Based on the shape features of the hysteresis loop shown in Fig.1, the arc tangent model is established via its trigonometric function [17] - [19], as shown in the following equation…”

Section: B Magnetic Hysteresis Of the Magnetic Corementioning

confidence: 99%

Performance Degradation Effect Countermeasures in Residence Times Difference (RTD) Fluxgate Magnetic Sensors

Zhang

Shi

et al. 2019

IEEE Sensors J.

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“…More details on the model can be found in [31]. From the analytical FORCs, the Everett function for the scalar PHM was calculated according to [30].…”

Section: Identification Of Core Materialsmentioning

confidence: 99%

Experimental determination and numerical evaluation of core losses in a 150‐kVA wound‐field synchronous machine

Rasilo¹,

Belahcen²,

Arkkio³

2013

IET Electric Power Applications

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The losses in the laminated core of a 150-kVA wound-field synchronous machine are investigated with calorimetric measurements and a numerical iron-loss model for steel laminations. Both grid supply and pulse-width modulated inverter supply with 1 kHz and 6 kHz switching frequencies are studied. The effect of rotor lamination material on total core losses is studied by measuring and simulating the machine with three prototype rotors, the first one being stacked of insulated 0.5-mm Fe-Si sheets and the last two of uninsulated 1-mm and 2-mm steel sheets, respectively. At no load, the losses in the frame of the machine are shown to be extremely significant with voltages above the rated one. The results on load operation show that the additional inverter-induced core losses are significantly larger with the thicker sheets. The rotor eddy-current loss is the most affected component because of loading and the distorted supply voltage. However, unlike expected and predicted by the model, the differences in the losses between the 1-mm and 2-mm rotors are negligible in no-load operation and relatively small also at load operation.

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“…Characteristics of electrical steels [8,9], such as those used in transformers and motors have been well addressed. However, such data could not be used directly for structural steels in the lightning transient analysis.…”

Section: Introductionmentioning

confidence: 99%

Model of ferromagnetic steels for lightning transient analysis

Chen

2018

IET Science, Measurement & Technology

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Magnetic core model

Cited by 20 publications

References 14 publications

Performance Degradation Effect Countermeasures in Residence Times Difference (RTD) Fluxgate Magnetic Sensors

Performance Degradation Effect Countermeasures in Residence Times Difference (RTD) Fluxgate Magnetic Sensors

Experimental determination and numerical evaluation of core losses in a 150‐kVA wound‐field synchronous machine

Model of ferromagnetic steels for lightning transient analysis

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