The bearings of the flywheel energy storage system play an important role in supporting the flywheel, reducing frictional resistance, and ensuring the stability of the whole system. It is a key component that determines the energy storage capability, charging and discharging efficiency, and lifetime of the flywheel. The electromagnetic bearing is a multi-variable time-varying coupling...
As we all know, the motor equipped with hybrid magnetic bearings (HMB) is easier to get higher speed and higher power because HMB not only has the advantages of no friction and wear, but also has the advantages of high suspension force density and low power consumption. Therefore, HMB has important application value, especially in the field of high-speed direct drive. Until now, domestic and...
The named fully superconducting magnetic bearing (SMB) consists of a rotor of high temperature superconducting (HTS) bulk of YBaCuO and a stator wind of HTS coated conductor tapes. The fully SMB has been developed a prototype and under operation in Japan. The dynamics of fully SMB under long term operation is vital to engineering applications, however, the experimental and theoretical studies...
We are presenting a detailed study of the magnetization of CC-tapes stacks by the flux pump method. Magnetization of a CC-tapes stack was carried out using repeated cyclical impact of a local magnetic field source. The size of the localized area of the external magnetic field was five times smaller than the size of the HTSC sample.
A commercially available 12 mm wide CC-tape from SuperOx was...
Due to the use of high-performance permanent magnet, hybrid magnetic bearing (HMB) has the advantages of compact structure, high levitation force density and low power consumption. In particular, the six-pole AC HMB can be driven by a three-phase inverter to generate radial two degrees of freedom (2-DOF) suspension force with low cost, symmetrical structure, good linear force current...
The ground semi-physical simulation experiment is essential for the reliability verification of micro satellites equipped with micro thrusters. The HTS translational system based on the complete diamagnetism of superconductors is a feasible scheme. In order to explore the levitation force, translational characteristics and the factors affecting the performance of superconducting translational...
Superconducting magnetic bearing (SMB) is a promising candidate for flywheel energy storage systems due to its great advantages of low friction loss, long-life operation, and maintenance-free. Since the amount of the SMB stored energy is strongly related to its levitation force, in this work, we have proposed a novel structure of hybrid superconducting stator which combines the HTS bulks and...
Superconducting flywheel energy storage system (SFESS) has the advantages of fast response, high power density, long life, unlimited charge and discharge and pollution-free. With the improvement of the mechanical properties of superconducting magnetic bearings（SMBs）, it will be a better choice for SFESS to adopt fully-superconducting bearing composed of HTS coil stator and HTS bulk rotor. Due...
The stability of a levitation transport system using a bulk superconductor levitated above a permanent magnet rail has been studied. We investigated the inclination of the superconducting shuttle to improve the stability of the superconducting levitation transport system. The roll angle of the superconductor shuttle was estimated by measuring the magnetic force acting on each part of the...
The homopolar hybrid magnetic bearing (HHMB) has the characteristics of the same air gap magnetic field direction, simple manufacture and assembly, low hysteresis and eddy current loss because the axial magnetized permanent magnet is often used to provide bias flux. Therefore, the HHMB has often adopted to suspend the rotor of the high-speed motorized spindle to obtain good performances of...
The magnetic bearing using the pinning effect of the high-temperature superconductor (HTS) has been developed. The rotor composed of the permanent magnet levitates without control with levitation gap g = 10 mm due to the pinning effect of HTS. In order to give the function of the secondary side of the induction motor (IM) to the magnetic bearing, a force other than the rotation direction due...
Recently, radial hybrid magnetic bearings (RHMBs)，which can suspend the rotor stably by electromagnetic forces in radial two degrees of freedom (2-DOF), have received more and more attentions. Besides, RHMBs have the advantages, such as no wear, no lubrication, long life and free maintenance. Therefore, RHMBs have broad application prospects in industrial rotating machineries, especially in...
As a novel type of rail transit system, high temperature superconducting (HTS) maglev has entered the research and development stage of engineering application. During the future practical engineering, the dynamics performance of HTS maglev system is very important. Because its vibration characteristics will affect the safety and comfort of vehicle operation. Although, lots of previous...
