A piezoelectric wind energy harvester excited indirectly by a coupler via magnetic-field coupling

2021 ◽  
Vol 240 ◽  
pp. 114250
Author(s):  
Junwu Kan ◽  
Weilin Liao ◽  
Shuyun Wang ◽  
Song Chen ◽  
Xin Huang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Wind Energy ◽  
Energy Harvester ◽  
Field Coupling ◽  
Magnetic Field Coupling

Internal magnetic field tests and magnetic field coupling model of a three-coil magnetorheological damper

2020 ◽  
Vol 31 (19) ◽  
pp. 2179-2195 ◽  
Author(s):  
Yang Yang ◽  
Zhao-Dong Xu ◽  
Ying-Qing Guo ◽  
Yan-Wei Xu ◽  
Jie Zhang
Keyword(s):  
Magnetic Field ◽  
Finite Element ◽  
Field Tests ◽  
Coupling Model ◽  
Magnetorheological Damper ◽  
Internal Magnetic Field ◽  
Magnetorheological Dampers ◽  
Element Analysis ◽  
Field Coupling ◽  
Magnetic Field Coupling

Magnetorheological damper is a typical semi-active control device. Its output damping force varies with the internal magnetic field, which is a key factor affecting the dynamic performance of the magnetorheological dampers. Existing studies about the magnetic field of magnetorheological dampers are limited to theoretical analysis; thus, this study aims to experimentally explore the complicated magnetic field distribution inside the magnetorheological dampers with multiple coils. First, the magnetic circuit of a three-coil magnetorheological damper was theoretically analyzed and designed, and the finite element model of the three-coil magnetorheological damper was set up to calculate the magnetic induction intensities of the damping gaps in different currents and numbers of coil turns. A three-coil magnetorheological damper embedded with a Hall sensor was then manufactured based on the theoretical and finite element analysis, and internal magnetic field tests under different conditions were carried out to obtain the actual magnetic induction intensities. At last, the magnetic field coupling model of the three-coil magnetorheological damper was proposed by introducing a coupling coefficient to describe the complex magnetic field distribution due to the strong coupling effect of the three coils, and the results calculated by the proposed model agreed well with the finite element analysis and magnetic field test data. The proposed model lays a foundation for the optimal design of the magnetic circuit and the mathematical model of multi-coil magnetorheological dampers.

Electromagnetic Design of a Novel DC Lorentz Motor for Micromanipulation

2012 ◽  
Vol 157-158 ◽  
pp. 106-109
Author(s):  
Xin Yan Qin
Keyword(s):  
Magnetic Field ◽  
Finite Element ◽  
Design Method ◽  
Element Model ◽  
Electromagnetic Design ◽  
Field Coupling ◽  
Model And Simulation ◽  
Simulation Results ◽  
3D Finite Element Method ◽  
Magnetic Field Coupling

In this paper, an electromagnetic design method for a novel DC Lorentz Motor for micromanipulation is described. To optimize permanent magnet (PM) array and minimize the magnetic field coupling among PMs, the distribution of magnetic field and the fluctuation of Lorentz force are obtained by the 3D finite-element method (FEM). Through the electromagnetic analysis, an optimized distribution and shape of PMs are found. Finally, the optimized DC Lorentz motor is manufactured. These simulation results are verified by those of the experiment results, which presents the finite element model and simulation results are reasonable.

Multilayered Electromagnetic Interference Shielding Structures for Suppressing Magnetic Field Coupling

2018 ◽  
Vol 47 (9) ◽  
pp. 5243-5250 ◽  
Author(s):  
Atom O. Watanabe ◽  
Pulugurtha Markondeya Raj ◽  
Denny Wong ◽  
Ravi Mullapudi ◽  
Rao Tummala
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Interference ◽  
Electromagnetic Interference Shielding ◽  
Field Coupling ◽  
Magnetic Field Coupling

Near Magnetic Field Coupling Prediction Using Equivalent Spherical Harmonic Sources

2014 ◽  
Vol 56 (6) ◽  
pp. 1457-1465 ◽  
Author(s):  
Thi Quynh Van Hoang ◽  
Arnaud Breard ◽  
Christian Vollaire
Keyword(s):  
Magnetic Field ◽  
Spherical Harmonic ◽  
Field Coupling ◽  
Magnetic Field Coupling
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