Simulation of magnetic attraction force in thermomagnetic engine

2015 ◽  
Vol 58 (3) ◽  
pp. 355-358
Author(s):  
D. A. Gabrielyan ◽  
V. V. Semenov ◽  
A. A. Uteshev
Keyword(s):  
Attraction Force ◽  
Magnetic Attraction

Modeling of Magnetic Attraction Force of Electromagnetic Module in a Relative Base – Air-Gap – Absolute Base System

2008 ◽  
Vol 144 ◽  
pp. 53-58 ◽  
Author(s):  
Tomasz Huścio ◽  
Krzysztof Falkowski
Keyword(s):  
Physical Model ◽  
Mathematical Description ◽  
Permanent Magnets ◽  
Air Gap ◽  
Base System ◽  
Attraction Force ◽  
Magnetic Attraction

In this paper a formula of estimation of magnetic attraction force in the relative base – air-gap – absolute base system is presented. The attraction force of the relative base (forcer) to the ferromagnetic absolute base (stator) is a result of the attraction of permanent magnets, which are the components of the electromagnetic modules. The physical model and mathematical description of the particular electromagnetic module are presented.

scholarly journals Study for a Wall-Climbing Robot Magnetic Attraction Force of An Electronically Controlled Permanent Magnet

CONVERTER ◽  
2021 ◽  
pp. 119-132
Author(s):  
Xin Chen, Wuwei Feng, Yulian Zhang, Minglei Li, Shifei Wu
Keyword(s):  
Permanent Magnet ◽  
Outer Surface ◽  
Magnetic Force ◽  
Pulse Current ◽  
Resistance Force ◽  
Climbing Robot ◽  
Attraction Force ◽  
Magnetic Attraction ◽  
Magnetizing Force ◽  
Magnetic Adsorption

With the advancement in science and technology, a wall-climbing robot attached to the ship's outer surface is increasingly replacing humans in the rust removal. The magnetic force is not just the adsorption force but also the moving resistance force, which is currently the technological bottleneck in wall-climbing robotics based on magnetic adsorption. This paper proposes a novel wall-climbing robot based on electrically controlled permanent magnet technology to solve this problem. An electrically controlled permanent magnetic wall-climbing robot is proposed to realize the function of magnetization and demagnetization by changing the pulse current. The results of the experiments reveal that the magnetizing force is adequately adsorbed on the ship's outer surface. The magnetic attraction force is close to 0 N during demagnetization, meaning that the system is fully unloaded, as predicted by the theoretical analysis.

scholarly journals Analysis of the Vertical Driving Performance of Multiple Connected Pipe-Climbing Microrobots with Magnetic Wheels

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 524
Author(s):  
Munehisa Takeda ◽  
Isao Shimoyama
Keyword(s):  
External Force ◽  
Driving Performance ◽  
Attraction Force ◽  
Magnetic Attraction ◽  
Small Cylinder ◽  
Vertical Climbing

In this study, we analyzed the vertical driving performance of multiple connected magnetic wheel-driven microrobots when moving up and down a small cylinder that simulated a pipe. The dynamics of pipe climbing by the magnetic wheel-driven microrobot were analyzed considering the magnetic attraction force and slip; a vertical climbing simulator was developed considering the hoop force and external force from the adjacent microrobots to determine the magnetic attraction force required for multiple connected microrobot pipe climbing. A prototype of an independent vertical climbing microrobot, 5 mm long, 9 mm wide, and 6.5 mm high, and prototypes of 10 microrobots were manufactured to evaluate the vertical driving performance. The usefulness was verified by showing that three driving microrobots can move seven non-driving microrobots comprising 60% of their own weight up and down along a small cylinder.

Enhancing the Color Performance of Pigment Inkjet Printing of Cotton Fabric by Electrostatic Attraction Force

2017 ◽  
Vol 61 (5) ◽  
pp. 505051-505057 ◽  
Author(s):  
Zundong Liu ◽  
Kuanjun Fang ◽  
Hongguo Gao ◽  
Xiuming Liu ◽  
Jianfei Zhang ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Inkjet Printing ◽  
Electrostatic Attraction ◽  
Attraction Force

scholarly journals The Impact of the Electric Field on Surface Condensation of Water Vapor: Insight from Molecular Dynamics Simulation

Nanomaterials ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 64 ◽  
Author(s):  
Qin Wang ◽  
Hui Xie ◽  
Zhiming Hu ◽  
Chao Liu
Keyword(s):  
Molecular Dynamics ◽  
Water Vapor ◽  
Electric Field ◽  
Intermolecular Forces ◽  
Dynamics Simulation ◽  
Water Molecules ◽  
Attraction Force ◽  
Condensation Rate ◽  
Shape Transformation ◽  
The Impact

In this study, molecular dynamics simulations were carried out to study the coupling effect of electric field strength and surface wettability on the condensation process of water vapor. Our results show that an electric field can rotate water molecules upward and restrict condensation. Formed clusters are stretched to become columns above the threshold strength of the field, causing the condensation rate to drop quickly. The enhancement of surface attraction force boosts the rearrangement of water molecules adjacent to the surface and exaggerates the threshold value for shape transformation. In addition, the contact area between clusters and the surface increases with increasing amounts of surface attraction force, which raises the condensation efficiency. Thus, the condensation rate of water vapor on a surface under an electric field is determined by competition between intermolecular forces from the electric field and the surface.

Mechanism of Boundary Lubrication and the Edge Effect

1965 ◽  
Vol 87 (3) ◽  
pp. 735-739 ◽  
Author(s):  
Y. Tamai ◽  
B. G. Rightmire
Keyword(s):  
Thin Film ◽  
Acid Solution ◽  
Palmitic Acid ◽  
Boundary Lubrication ◽  
Frictional Resistance ◽  
Copper Surface ◽  
Bulk Liquid ◽  
Attraction Force ◽  
Thin Film Lubrication ◽  
Film Lubrication

Experimental work was carried out on the boundary lubrication of a copper-copper couple with pure cetane, palmitic acid solution of cetane, and some other organic materials. The purpose was to get information about α and μlube, which appear in the friction equation: μ=αμsolid+(1−α)μlube, by using two different kinds of copper surface, a clean surface, and an oxidized surface. α was found to be small with palmitic acid solution, and the estimated shear strength of palmitic acid was high under the examined condition. α and μlube seemed to be properties which are independent of each other. α is closely related to the attraction force between the lubricant and the substrate, whereas μlube is related to the complexity of molecular structure of the lubricant. A comparison was made of bulk-liquid and thin-film lubrication. μlube was smaller in thin-film lubrication than it was in bulk-liquid lubrication. This suggests that the frictional resistance may be partly contributed by liquid in the edge space around the real contact.

Sign in / Sign up

Export Citation Format

Share Document