Electromagnet design for ultra-low-field MRI

Shen, Sheng; Wu, Jiamin; Guo, Pan; Hongyi, Wang; Chen, Fangge; Meng, Fanqin; Xu, Zheng

doi:10.3233/jae-190051

Cited by 1 publication

(2 citation statements)

References 13 publications

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“…The permeance corresponding to the area of penetration of the magnetic flux into the lower disk (bar) is named P3,4. The value of this permeance depends on the thickness of the disk and will be calculated with the help of relations ( 5) to (8) and integration in the range 0≤φ≤π, i.e., for half of the disk. P4,5 shows the permeance in the middle of the lower half of the disk and its value is equal to: Where Se is the cross-section area of half of the surrounding cylinder and is equal to: P10,11 is the permeance of the area of the upper disk where the flux path rotates to enter the central cylinder.…”

Section: -2-magnetic Equivalent Circuitmentioning

confidence: 99%

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Cylindrical Electromagnets: An Accurate Magnetic Equivalent Circuit

Hashemi,

Qaraei

2024

Preprint

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Cylindrical electromagnets are used in various industries. The geometric structure and circular symmetry of these electromagnets reduce flux leakage and increase their efficiency. In this paper, a precise magnetic equivalent circuit for the cylindrical electromagnet is presented and its permeance relations are proved. In order to evaluate the proposed model, the magnetic field in different parts of the cylindrical electromagnet was calculated and compared with the simulation results. The highest error between the results of the two methods is related to the calculation of the magnetic field under the coil, which is equal to 3%. Also, the platform of a laboratory crane was built using a cylindrical electromagnet. The results of the lifting force measurement in comparison with the results of the analysis of the proposed model show an error of less than 2%, which indicates the high accuracy of the proposed model.

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Section: -2-magnetic Equivalent Circuitmentioning

confidence: 99%

“…This comparison shows that the proposed MEC for cylindrical electromagnets has high accuracy. Figure (8) shows the top view of the magnetic field behavior inside the upper disk. In this simulation, the coil is excited by a current of 5 A.…”

Section: Fig 6: B-h Curve Of Steel-1008 In DC Modementioning

confidence: 99%

Cylindrical Electromagnets: An Accurate Magnetic Equivalent Circuit

Hashemi,

Qaraei

2024

Preprint

View full text Add to dashboard Cite

show abstract

Electromagnet design for ultra-low-field MRI

Cited by 1 publication

References 13 publications

Cylindrical Electromagnets: An Accurate Magnetic Equivalent Circuit

Cylindrical Electromagnets: An Accurate Magnetic Equivalent Circuit

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