Conveners
Thu-Mo-Po4.14 - Levitation and Magnetic Bearings IV
- Toru Ogitsu (KEK)
- Nikolay Bykovskiy (CERN)
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INTRODUCTION
Recently, magnetic levitation techniques have been developed for various fields such as magnetically levitated vehicles and energy storage flywheels. Thus, there are many reports about levitation techniques using high critical temperature (Tc) superconducting magnetic bearings (SMBs) composed of superconducting (SC) bulk and permanent magnet (PM). However, there are not so...
Recently, the national interest in transportation logistics is increasing due to the population aging and metropolitanization. And, it is a big issue for ultra-high-speed rail technology to meet a lot of demand in a short period of time. Germany has commercialized a 501 km/h train in Shanghai, China (2004), and the TGV in France is operating at 570 km/h. In addition, Japan is currently...
High-temperature superconducting magnetic levitation (HTS Maglev) system has the intrinsic advantage of self-stabilizing suspension without external control, and has great potential to be a new type of rail transit. The HTS bulks are core component of the the HTS Maglev train. Many experiments show that the levitation performance of superconducting bulks have been significantly improved when...
The levitation force of high temperature superconducting (HTS) bulks can be enhanced by increasing the strength of the external magnetic field. Many researchers have reached this conclusion by doing experiments above a permanent magnet guideway (PMG). However, the experimental results have limitations because the magnetic field above the PMG is relatively low. In order to obtain more...
A high precision superconducting levitation system for gravity measurement has been developed which used the levitation of a superconducting sphere by the magnetic field of two superconducting coils. In order to obtain high stiffness in a suspension system, an electrostatic suspension system is introduced to the superconducting levitation system. The hybrid levitation system is operated in...
The superconducting joint resistance in the superconducting magnetic levitation coil leads to the continuous decrease of the closed-loop current, which causes a weakening of the levitation magnetic field in the gravity measuring device. This magnetic field attenuation will cause the falling of the superconducting sphere used to measure gravity, making the measured data larger than the real...
A device for superconducting gravity measurement with high observing precision and stability is developed. In this device the test mass and spring are in the form of a superconducting sphere and superconducting magnet which is operated in the persistent mode. Once the sphere is levitated in the field generated by the superconducting magnet and the gradient adjusted, the sphere will move...
With the rapid development of rare earth materials, the permanent magnet electrodynamic suspension (PMEDS) technology has met a new development opportunity. This paper presents a study on a special PMEDS system named as an electrodynamic wheel (EDW). In the PMEDS system, an annular Halbach permanent magnet array is designed and rotated above a flat aluminium sheet. We establish a simplified 2D...
