scholarly journals Enhanced magnetic flux density mapping using coherent steady state equilibrium signal in MREIT

AIP Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 035121
Author(s):  
Woo Chul Jeong ◽  
Mun Bae Lee ◽  
Saurav Z. K. Sajib ◽  
Hyung Joong Kim ◽  
Oh In Kwon ◽  
...  
Keyword(s):  
Steady State ◽  
Magnetic Flux ◽  
Flux Density ◽  
Magnetic Flux Density ◽  
State Equilibrium ◽  
Density Mapping

Alternating steady state free precession for estimation of current-induced magnetic flux density: A feasibility study

2015 ◽  
Vol 75 (5) ◽  
pp. 2009-2019 ◽  
Author(s):  
Hyunyeol Lee ◽  
Woo Chul Jeong ◽  
Hyung Joong Kim ◽  
Eung Je Woo ◽  
Jaeseok Park
Keyword(s):  
Steady State ◽  
Magnetic Flux ◽  
Flux Density ◽  
Feasibility Study ◽  
Steady State Free Precession ◽  
Magnetic Flux Density ◽  
Free Precession

scholarly journals Design of a New 1D Halbach Magnet Array with Good Sinusoidal Magnetic Field by Analyzing the Curved Surface

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2522
Author(s):  
Guangdou Liu ◽  
Shiqin Hou ◽  
Xingping Xu ◽  
Wensheng Xiao
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Permanent Magnet ◽  
Flux Density ◽  
Permanent Magnets ◽  
Air Gap ◽  
Curved Surface ◽  
Magnetic Flux Density ◽  
Sinusoidal Magnetic Field ◽  
The Magnetic Field

In the linear and planar motors, the 1D Halbach magnet array is extensively used. The sinusoidal property of the magnetic field deteriorates by analyzing the magnetic field at a small air gap. Therefore, a new 1D Halbach magnet array is proposed, in which the permanent magnet with a curved surface is applied. Based on the superposition of principle and Fourier series, the magnetic flux density distribution is derived. The optimized curved surface is obtained and fitted by a polynomial. The sinusoidal magnetic field is verified by comparing it with the magnetic flux density of the finite element model. Through the analysis of different dimensions of the permanent magnet array, the optimization result has good applicability. The force ripple can be significantly reduced by the new magnet array. The effect on the mass and air gap is investigated compared with a conventional magnet array with rectangular permanent magnets. In conclusion, the new magnet array design has the scalability to be extended to various sizes of motor and is especially suitable for small air gap applications.

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