Control Method of the Semi-Active Damper Coil System in the Superconducting Magnetically Levitated Bogie Against Vertical and Pitching Oscillation

Ohashi, Shigeru; Ueshima, Takayuki

doi:10.1109/tmag.2012.2202378

Cited by 27 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The levitation force is generated by the SC coil on the bogie and the levitation coil. For the connection of the levitation coil, the eight-figure null-flux is used to generate levitation and guidance force [7].…”

Section: Analysis Methods 21 Eds Systemmentioning

confidence: 99%

Improvement of Damping Factor by Optimal Shape and Installation Position of the Damper Coils at Low Velocity Range in Electrodynamic Suspension System

Yamamoto

Betsunoh

Ohashi

2022

J. Phys.: Conf. Ser.

Self Cite

View full text Add to dashboard Cite

The electrodynamic suspension system (EDS) realizes stable levitation without the gap control. One of its application is JR Maglev. The EDS system has basically no damping factor against the disturbance. The damping factor is improved by installing the additional coil. However, the damping factor is needed especially at the low velocity. The normal operation velocity in the JR Maglev is the velocity vx = 120[m/sec]. The optimal shape and installation position of the damper coils at the low velocity range such as vx < 80[m/sec] is discussed. The type of the damper coil system and the velocity do not affect the optimal height of the coil. The optimal width of the damper coil in the semi-active system is 8.9% smaller than that in the passive one. The optimal installation position is higher at the low velocity than that at the normal operation velocity in both damper system type. By this optimization, the vertical oscillation is up to 13.6% smaller and the pitching oscillation is up to 11.0% smaller.

show abstract

Section: Analysis Methods 21 Eds Systemmentioning

confidence: 99%

Improvement of Damping Factor by Optimal Shape and Installation Position of the Damper Coils at Low Velocity Range in Electrodynamic Suspension System

Yamamoto

Betsunoh

Ohashi

2022

J. Phys.: Conf. Ser.

Self Cite

View full text Add to dashboard Cite

show abstract

“…If the bogie passes through the center of the eight-figure coils, levitation force is generated by the passing of the SC coils that are fixed on the bogie. Current induced in the levitation coils is calculated as follows [9]: the EDS system is given as an air-core coil system, and modeled as electric circuits. The mutual inductance between the SC coils and levitation ones in Fig.…”

Section: A Numerical Analysis Methodsmentioning

confidence: 99%

Influence of the Damper Coil System on the Levitation Characteristics in the Superconducting Magnetically Levitated System in Case of SC Coil Quenching

Ohashi

Ueda

2014

IEEE Trans. Magn.

Self Cite

View full text Add to dashboard Cite

Numerical simulation of the superconducting magnetically levitated bogie (JR Maglev) has been studied. The electrodynamic suspension is used for levitation and guidance. Although no gap control is needed for this suspension system, the damping factor of the system is shown to be small. Therefore, an additional damping system is considered. The damper coil system is introduced to increase damping of the levitation system. In this levitation system, superconducting (SC) coil quenching is a serious problem. It is important to show the influence of the damper coils in the case of SC coil quenching. The running simulation program that calculates the rotational motion of the bogie is developed, and the effect of the damper coils on the bogie motion is shown. From the result, the damper coil system decreases vibration of the bogie after SC coil quenching, and reduces unstable electromagnetic force.

show abstract

“…Alternatively, the major design concern of this research is to seek feasible arrangement that can both generate the maximum required damping force and convert the mechanical vibration to electric energy directly [7], [8]. A hybrid suspension system, which consists of a permanent magnet (PM) shock absorber for providing the maximum suspension force and a slotless permanent magnet linear generator (PMLG) for generating both the electricity and the controllable damping, is designed to fulfill the system requirements.…”

Section: Introductionmentioning

confidence: 99%

Design and operational analyses of an electromagnetic hybrid shock absorber system for scooter application

Liu

Hwang

Lin

2014

2014 17th International Conference on Electrical Machines and Systems (ICEMS)

View full text Add to dashboard Cite

To effectively harvest the inherent vibration energies, feasibility of replacing those common mechanical shock absorbers that are mounted between the wheels and bogie of a scooter with electromagnetic motion device will be assessed. Instead of consuming additional energies to control the vibration patterns, the main design objectives are to produce the suspension forces to meet the maximum encountered force specifications, and to convert the input mechanical vibrations to electric energies directly. Based on proper emulation designs and electric output controls, the operational fluxes and dynamic characteristics of this hybrid suspension system at various operational conditions will be thoroughly investigated, and the satisfactory performances of the proposed system can then be systematically validated.

show abstract

Control Method of the Semi-Active Damper Coil System in the Superconducting Magnetically Levitated Bogie Against Vertical and Pitching Oscillation

Cited by 27 publications

References 3 publications

Improvement of Damping Factor by Optimal Shape and Installation Position of the Damper Coils at Low Velocity Range in Electrodynamic Suspension System

Improvement of Damping Factor by Optimal Shape and Installation Position of the Damper Coils at Low Velocity Range in Electrodynamic Suspension System

Influence of the Damper Coil System on the Levitation Characteristics in the Superconducting Magnetically Levitated System in Case of SC Coil Quenching

Design and operational analyses of an electromagnetic hybrid shock absorber system for scooter application

Contact Info

Product

Resources

About