Magnetic Forces Between a Magnet and a Solenoid

Kwon, Minho; Jung, JoongWoo; Jang, Taehun; Sohn, Sang Ho

doi:10.1119/1.5145528

Cited by 15 publications

(8 citation statements)

References 12 publications

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“…It can be seen that a smaller sensor signal-input slope appears with a greater distance between the solenoid and the sensor structure. This could be explained by calculating the magnetic force between a solenoid and a magnet; the magnetic force would decrease monotonically with the increasing separation distance [22]. A solenoid-sensor distance less than 1 cm is not applicable in this experiment due to the deformed sensing hole structure at such distance, which also confirms the magnetic force explanation above.…”

Section: Resultssupporting

confidence: 68%

A Low-Frequency Magnetic Field Sensor Based on Fiber Bragg Gratings

et al. 2022

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A new type of low-frequency magnetic-field sensor based on fiber Bragg gratings (FBGs) was experimentally demonstrated for measuring the DC to low-frequency magnetic field. The operating mechanism of this AC magnetic sensor is based on the strain exerted by a loaded magnet on the sensing structure, which causes center-wavelength shifts of FBG. The achieved sensitivity was 8.16 pm/G with a resolution of 3 Gauss at ambient conditions. The proposed FBG magnetic sensor is easy to use, compact, and suitable for DC to low-frequency magnetic sensing applications.

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Section: Resultssupporting

confidence: 68%

A Low-Frequency Magnetic Field Sensor Based on Fiber Bragg Gratings

et al. 2022

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“…Meanwhile, the magnetic fields of the magnet were measured at the different positions of the cylindrical magnet on the central axis using a magnetic field sensor (PS-2162, PASCO). The value of = ´-M 7.907 10 A m 5 1 was obtained by fitting the results for the magnetic fields, using the FindFit function (equation (3) in [22]) according to the solenoid model [22]. The turns of the solenoid were = N 110.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…where I m is Ampere's current of the magnet, and n I m m equals to M [22]. As seen in equation ( 16), F d depends on various experimental factors.…”

Section: ̈( )mentioning

confidence: 99%

Theory and experiment for a solenoid based currents and the magnetic drag

Jang

et al. 2023

Eur. J. Phys.

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In this study, we derived formulas for the current waveforms induced by a magnet oscillating at arbitrary positions on the axis of a solenoid. We also conducted an experiment for measuring the currents induced in a solenoid by a magnet oscillating in the inner or outer region of a solenoid and compared the results with the theoretical predictions. It was confirmed that the magnitude and shape of waveforms of induced currents that were obtained from the derived formulas fit well with experimental results. In addition, the magnetic drag force exerted on the magnet by the induced current is formulated and compared with the prediction estimated by the attenuation coefficient and velocity.

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“…In the experiment, the distance h between the magnet and coil near the equilibrium point was 10 mm, and the resistance of the coil used was W 0.5 . Further, the magnetization M of the magnet used in the experiment was obtained through theoretical fitting using the FineFit function introduced in a previous study [24], and it was calculated to be =…”

Section: Methodsmentioning

confidence: 99%

Analysis of the current induced by the motion of a magnet pendulum with a large initial angle

Seo

Jang²,

Ha³

et al. 2022

Eur. J. Phys.

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In this study, formulae for the waveform of an induced current, I(t), generated when a magnet traverses along a rectangular coil with a narrow width were theoretically obtained considering the relative motion of the magnet and coil. Consequently, an experiment was performed under experimental conditions that matched the formulas, and the results obtained were compared with the theoretical predictions. The dependence of I(t) on the initial angle ϕ 0 of the magnet pendulum and the width w of the rectangular coil was found to be consistent with the theoretical prediction. Thus, the formulae obtained in this study are expected to be useful in addressing temporal variations in the waveform of the induced current produced by a magnet moving in a polar coordinate space.

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Magnetic Forces Between a Magnet and a Solenoid

Cited by 15 publications

References 12 publications

A Low-Frequency Magnetic Field Sensor Based on Fiber Bragg Gratings

A Low-Frequency Magnetic Field Sensor Based on Fiber Bragg Gratings

Theory and experiment for a solenoid based currents and the magnetic drag

Analysis of the current induced by the motion of a magnet pendulum with a large initial angle

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