Computer Simulation of a Radial Contactless Magnetic Suspension 
on a Permanent Magnet System

The distributions of magnetic induction and magnetic field strength are obtained. It was found that with a parallel arrangement of toroidal rings of elliptical cross-section in a magnetic suspension, the magnetic induction is 1.7 times higher than with a perpendicular arrangement of the same rings. The calculation of the ponderomotive and magnetomotive forces between two toroidal annular permanent magnets with a radial magnetization of an elliptical section in a contactless magnetic suspension system is carried out. Quasi-elastic stiffness coefficients and static load capacity were calculated for both models. It is shown that the rigidity of the suspension decreases monotonically with a decrease in the size of the gap, regardless of the model.

Download Full-text

Magnetic suspension mechanism using rotary permanent magnets

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209412 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 977-983

Author(s):

Koichi Oka ◽

Kentaro Yamamoto ◽

Akinori Harada

Keyword(s):

Permanent Magnets ◽

Suspension System ◽

Magnetic Suspension ◽

Horizontal Force ◽

Mechanical Contact ◽

New Type ◽

Magnetic Suspension System

This paper proposes a new type of noncontact magnetic suspension system using two permanent magnets driven by rotary actuators. The paper aims to explain the proposed concept, configuration of the suspension system, and basic analyses for feasibility by FEM analyses. Two bar-shaped permanent magnets are installed as they are driven by rotary actuators independently. Attractive forces of two magnets act on the iron ball which is located under the magnets. Control of the angles of two magnets can suspend the iron ball stably without mechanical contact and changes the position of the ball. FEM analyses have been carried out for the arrangement of two permanent magnets and forces are simulated for noncontact suspension. Hence, successfully the required enough force against the gravity of the iron ball can be generated and controlled. Control of the horizontal force is also confirmed by the rotation of the permanent magnets.

Download Full-text

A Low Frequency Permanent Magnet Passive Vibration Isolator

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.586.328 ◽

2012 ◽

Vol 586 ◽

pp. 328-336

Author(s):

Qiang Li ◽

Deng Feng Xu ◽

Jin Chun Hu ◽

Liu Hao

Keyword(s):

Permanent Magnet ◽

Permanent Magnets ◽

Load Capacity ◽

Semiconductor Industry ◽

Low Frequency ◽

Magnetic Suspension ◽

Experimental Results ◽

Vibration Isolator ◽

Rubber Membrane ◽

Guide Device

Magnetic suspension vibration isolators have attracted significant attention in the field of semiconductor industry and high precision equipments. However, it is impossible to levitate an object by only permanent magnet due to instability of permanent magnets. It needs a guide device or active control to hold the magnetic suspension passive vibration isolator (MSPVI) at equilibrium position. In order to overcome the instability of the permanent magnets, the linear bearing, rubber O-ring and rubber membrane are applied in the MSPVI. The transmissibility of the MSPVI was calculated and subsequently measured. The experimental results show that the MSPVI can achieve low natural frequency with the help of the rubber membrane which is superior to the linear bearing and o-ring. Beside, the vibration isolating performance of the MSPVI is measured. The experimental results reveal that the MSPVI achieves the lowest resonant frequency when the load capacity of the MSPVI reaches maximum value.

Download Full-text

Proposal of Noncontact Operation Robotic Hand Using Permanent Magnetic Suspension

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.712-715.2277 ◽

2013 ◽

Vol 712-715 ◽

pp. 2277-2280

Author(s):

Zhong Xu ◽

Feng Sun ◽

Jun Jie Jin ◽

Koichi Oka

Keyword(s):

Permanent Magnet ◽

Permanent Magnets ◽

Suspension System ◽

Magnetic Suspension ◽

Robotic Hand ◽

Magnetic Suspension System ◽

Metal Body ◽

And Performance

This paper proposes a noncontact operation robotic hand using magnetic suspension system. This robotic hand will consist of a noncontact catching part and four movable fingers. The noncontact catching part will be realized by a permanent magnetic suspension system, and will be used to pick up and catch the metal body. There is a permanent magnet on the top of each moveable finger, which operates the suspended metal body without contact. This paper focuses on the feasibility and performance of the noncontact operation using the movable fingers with permanent magnets.

Download Full-text

2A22 Application of Switching Stiffness Control to Magnetic Suspension System for Increasing Load Capacity

The Proceedings of the Symposium on the Motion and Vibration Control ◽

10.1299/jsmemovic.2010._2a22-1_ ◽

2010 ◽

Vol 2010 (0) ◽

pp. _2A22-1_-_2A22-13_

Author(s):

Yuji ISHINO ◽

Takeshi MIZUNO ◽

Masaya TAKASAKI

Keyword(s):

Load Capacity ◽

Suspension System ◽

Magnetic Suspension ◽

Magnetic Suspension System ◽

Stiffness Control ◽

Increasing Load

Download Full-text

Neodymium Magnetic Shock Absorber for Two Wheelers Automobiles

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.i1135.0789s219 ◽

2019 ◽

Vol 8 (9S2) ◽

pp. 660-662

Keyword(s):

Magnetic Flux ◽

Permanent Magnets ◽

Shock Absorber ◽

Research Work ◽

Suspension System ◽

Magnetic Suspension ◽

Maintenance Cost ◽

Damping Force ◽

Suspension Systems ◽

Magnetic Suspension System

This paper presents a research work on magnetic suspension system of two wheelers Automobiles, which are usually depending on spring type, Hydraulic and Pneumatic suspension systems. In this proposed magnetic suspension system, two permanent magnets made of Neodymium material are placed inside the shock absorber cylinder such that both facing same pole. So they produce a repulsive magnetic flux force, when they come closer due to shocking load. This repulsive magnetic flux force is used as shock absorbing media and provides damping force. Proposed suspension system proves to be more efficient over other type of suspension systems, absorb more number of shocks with high accuracy, has no leakage problem unlike in Hydraulic and Pneumatic system. So all these beneficial qualities make the magnetic suspension system to work efficiently with less maintenance cost and hence the Automobile.

Download Full-text

Application of Switching Stiffness Control to Magnetic Suspension System for Increasing Load Capacity(Mechanical Systems)

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.76.415 ◽

2010 ◽

Vol 76 (762) ◽

pp. 415-421

Author(s):

Yuji ISHINO ◽

Takeshi MIZUNO ◽

Masaya TAKASAKI

Keyword(s):

Load Capacity ◽

Mechanical Systems ◽

Suspension System ◽

Magnetic Suspension ◽

Magnetic Suspension System ◽

Stiffness Control ◽

Increasing Load

Download Full-text

Dynamic Magnetic Field and Oscillating Simulations of a Hybrid Magnetic Suspension System Utilizing Permanent Magnets

Materials Science Forum ◽

10.4028/www.scientific.net/msf.792.171 ◽

2014 ◽

Vol 792 ◽

pp. 171-176

Author(s):

Kenshiro Utsunomiya ◽

Takashi Todaka ◽

Masato Enokizono

Keyword(s):

Permanent Magnets ◽

Three Dimensional ◽

Magnetic Suspension ◽

Step Method ◽

Dynamic Simulations ◽

Model Combining ◽

Magnetic Suspension System ◽

The Time Domain ◽

Suspension Model ◽

Dynamic Magnetic Field

This paper presents vibration characteristics of a hybrid magnetic suspension model combining functions of a magnetic spring and a magnetic damper. Dynamic simulations considering the moving equation are performed with the step-by-step method based on the time-domain three-dimensional axisymmetric finite element method. The results demonstrate that the proposed hybrid model is effective to improve the performance to attenuate vibrations.

Download Full-text