Technical Report No.1156

No. 1156

Trend of Fusion Technology on Electric and Mechanical Systems for Magnetic Suspension Applications

Investigating R&D Committee on Electric and Mechanical Systems Fusion Technology for Magnetic Suspension Applications

Keyword :

Magnetic Levitation, Magnetic Bearing, Electric-mechanical System, Super-conducting, Diamagnetism

Magnetic suspensions application has been succeeded in various cutting edge technologies like maglev trains, artificial hearts, power storage systems and etc. following the development of new materials, new structures of electromechanical system and new controls. We investigated current researches and developments on magnetic suspensions from the viewpoint of "fusion technology."
Many technological opportunities were discovered through this investigation. For example, ride quality and non-contact power supply were the opportunities in the induced repulsion type maglev systems. In magnetism application maglev systems like diamagnetic levitation, stabilization and propulsion were also the opportunities. Further more, Vibration control and reliability were ones in electromagnetic levitation systems and magnetic bearings. In such opportunities, electric and mechanical systems were seen integrated into an electric-mechanical system by inter-field advanced technologies. These technologies were such as stiffness and vibration analysis (e.g., 3-D structure analysis and 3-D vibration modal analysis), control technology (e.g., a generalized internal model controller and an adaptive observer), power conversion technology (e.g., a conversion for harmonic waves of a magnetic field) and so on.
Most of the technical opportunities for magnetic suspension applications are due to the principle of electromagnetic force generation. This report was categorized as bellow for convenience for researchers and engineers in the fields of linear drives and non-contact suspensions.
(i) Induced repulsion type: Magnetic suspension by magnetically repulsive force between a traveling magnetic field and the eddy current induced by it.
(ii) Magnetism application type: Suspension by magnetic force due to magnetic properties of materials.
(iii) Magnetic force control type: Suspension by controlling magnetic force acting on ferromagnetic materials or magnets with coil excitation.
(iv) Flux-pinning force type: Suspension by magnetic force between magnets and high temperature super conducting materials, which memorize the pattern of a magnetic field by flux-pinning effect.