Optimized Design of 8-Figure Null-Flux Coils in EDS Maglev.

Murai, Toshiaki; Iwamatsu, Masaru; Yoshioka, Hiroshi

doi:10.1541/ieejias.123.9

Cited by 15 publications

(5 citation statements)

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“…The sets are not to be continually inserted but in facing pairs as it is shown in Fig. (2), (4) and (5). The other magnetic field is induced from the changes of the field that occur as the SCMs moves relative to the radial set of conductors located in the guideway.…”

Section: A Unified Propulsion and Guidance Systemmentioning

confidence: 99%

Electrodynamic Gravity Generator

Jevtovic¹,

Monte-Toledo²

2011

AIAA SPACE 2011 Conference &Amp; Exposition

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Weightless environment is causing numerous deleterious effects on human health. It complicates activities and material handling in space. It is necessary to design a kind of artificial gravity generators as life support systems to enable space exploration and colonization. Rotation is in the focus of all artificial-gravity research as generated centripetal acceleration can be substitute for gravity. The aim is to obtain controlled rotation in order to achieve at least partial levels of artificial gravity. A very effective way to spin objects in space is to use electrodynamic technologies suitable to be optimized and applied in favourable conditions of cold vacuum without gravity. Artificial gravity will provide opportunities for life sciences and advanced technology research. It will enable sustainable exploration and colonization of deep space. 

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Section: A Unified Propulsion and Guidance Systemmentioning

confidence: 99%

Electrodynamic Gravity Generator

Jevtovic¹,

Monte-Toledo²

2011

AIAA SPACE 2011 Conference &Amp; Exposition

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“…Moreover, as shown in Ref. 3, when an analytical method using a Fourier series is used, the electromotive force F ik (i = x, y, z) acting on the superconducting coils where x = kτ (k = . .…”

Section: Electronics and Communications Inmentioning

confidence: 99%

“…When using a coil with a 120-degree pitch, the pulsation to the superconducting magnets due to the harmonic magnetic field generated by the ground coils increases. Consequently, the phenomenon of superconducting magnet oscillation at this point has been analyzed, and countermeasures to reduce oscillation have been evaluated [3,4]. On the other hand, the analysis of the harmonics above is for conventional superconducting magnets that are the same length; it has not been performed for an arrangement of superconducting magnets with reduced leakage flux and a decreased terminal coil length.…”

Section: Introductionmentioning

confidence: 99%

Harmonic characteristics of SC coil configuration for EDS maglev to reduce leakage flux

Murai

Sakamoto

Fujiwara

et al. 2008

Elect Comm in Japan

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An improved configuration of SC coils, whose end coils are small, is studied to reduce their leakage flux. This paper examines the harmonic characteristics when the improved configuration of SC coils is applied to the 120‐degree coil pitch ground coil. An adequate combination of length and mmf in the end coils can provide proper performance of harmonics and basis. © 2009 Wiley Periodicals, Inc. Electron Comm Jpn, 91(10): 20– 27, 2008; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/ecj.10163

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“…Therefore, in order to improve the computational efficiency of levitation devices with null-flux electric circuits, the dynamic circuitry theory, which analyzes the levitation coil as a rectangular shape using the Fourier series, has been developed and widely utilized [17,18]. In addition, the characteristics of nonlinearly optimized coil designs were previously compared [19,20], and the dynamic characteristics of EDS systems were also investigated using simplified suspension models [21]. However, the dynamic circuitry still has a high computation load related to the induced electromotive force (EMF) and inductance.…”

Section: Introductionmentioning

confidence: 99%

Design Model of Null-Flux Coil Electrodynamic Suspension for the Hyperloop

Lim

Lee

et al. 2020

Energies

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The Hyperloop has been developed using various technologies to reach a maximum speed of 1200 km/h. Such technologies include magnetic levitation technologies that are suitable for subsonic driving. In the Hyperloop, the null-flux electrodynamic suspension (EDS) system and superconducting magnets (SCMs) can perform stable levitation without control during high-speed driving. Although an EDS device can be accurately analyzed using numerical analysis methods, such as the 3D finite element method (FEM) or dynamic circuitry theory, its 3D configurations make it difficult to use in various design analyses. This paper presents a new design model that fast analyzes and compares many designs of null-flux EDS devices for the Hyperloop system. For a fast and effective evaluation of various levitation coil shapes and arrangements, the computational process of the induced electromotive force and the coupling effect were simplified using a 2D rectangular coil loop, and the induced current and force equations were written as closed-form solutions using the Fourier analysis. Also, levitation coils were designed, and their characteristics were analyzed and compared with each other. To validate the proposed model, the analyzed force responses for various driving conditions and the changed performance trend by design variables were compared with analyzed FEM results.

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Optimized Design of 8-Figure Null-Flux Coils in EDS Maglev.

Cited by 15 publications

References 1 publication

Electrodynamic Gravity Generator

Electrodynamic Gravity Generator

Harmonic characteristics of SC coil configuration for EDS maglev to reduce leakage flux

Design Model of Null-Flux Coil Electrodynamic Suspension for the Hyperloop

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