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Magnetic Ball and Socket
Research Mentor
The Jisan Research Institute has developed a novel magnetic assembly called the magnetic ball and socket assembly. This assembly is designed to use static magnetic fields to suspend a magnetic cone assembly a distance from a single magnet or magnet assembly. The suspension provides support both vertically and tangentially. The assembly is pictured here.
In this orientation, the floating piece is the socket, while the bottom piece is the ball. As can be seen, the separation can be maintained when the system is vertical or horizontal.
JRI research groups are currently in the process of developing a variety of applications for this technology.
Research Papers
Invited Book Chapter:
- S. Kazadi, C. Koh, K. Kim, K. Jung, B. Kim, and H. Wang. The ε -Axle and its Application to a Floating Windmill, (Expanded conference paper) Advances in Electrical and Electronics Engineering - IAENG Special Edition of the World Congress on Engineering and Computer Science 2008, pp. 175-181, 2008.
(Postscript) (PDF)
Abstract
We describe and analyze a magnetic bear ing built using a permanent magnet assembly. The magnetic bearing comprises a co nical female magnet assembly and a rotationally symmetric identically polarized male piece. The opposition of the two parts produces a force between them which tends to hold them apart and aligned along an axis of symmetry. We describe the bearing and its use in generating an ε-axle, or an axle having a friction of some ε>0 . Finally, we integrate this ε-axle into a windmill d esign in which a single point of contact exists on the main axle.
Conference Papers:
- S. Kazadi and H. Shin. A magnetically levitated motor, Proceedings of the International Symposium on Power Electronics Electrical Drives Automation and Motion (SPEEDAM), 2010, Pisa, Italy, pp. 1776-1782, June 12-14, 2010.
(PDF)
Abstract
We describe a motor which is built on a floating axle technology. The motor has exactly one point of friction and the weight of the motor can be balanced against the magnetic field supporting it. We report the design, a model of operation, and the real performance. Limitations in sensor reaction speed and the effect of drag tend to limit speed. Real performance shows good agreement to expected theoretical performance.
- S. Kazadi, K. Kim, C. Koh, K. Jung, H. Wang, and B. Kim. A Magnetic Ball and Socket, an ε -Axle, and a Floating Windmill, Proceedings of the International Conference on Intelligent Automation and Robotics, San Francisco, California, USA, October 2008.
(Postscript) (PDF)
Abstract
We describe and analyze a magnetic bearing built using a permanent magnet assembly. The magnetic bearing comprises a conical female magnet assembly and a rotationally symmetric identically polarized male piece. The opposition of the two parts produces a force between them which tends to hold them apart and aligned along an axis of symmetry. We describe the bearing and its use in generating an ε-axle, or an axle having a friction of some ε>0 . Finally, we integrate this ε-axle into a windmill design in which a single point of contact exists on the main axle.
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