Fast and Precise Calculation of Mutual Inductance for Electrodynamic Suspension: Methodology and Validation

Su, Zhenhua; Luo, Jun; Ma, Guangtong; Liu, Kang; Cui, Libin; Wang, Yiyu

doi:10.1109/tie.2021.3088362

Cited by 22 publications

(4 citation statements)

References 28 publications

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“…The measurement method used was as described in the literature. 39 The five pairs of coils shown in Figure 12 were fixed on the test platform with an identical separation Δz ¼ 25mm and misalignment Δx ¼ 0, Δy ¼ 15mm, respectively. Then, the mutual inductance between the above five pairs of coils was measured, and the values were recorded in the right column of Table 2.…”

Section: Experimental Verificationmentioning

confidence: 99%

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A novel method for calculating the mutual inductance between two perpendicular coils in wireless power transfer

Feng

2023

Circuit Theory & Apps

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SummaryThe perpendicular coil is increasingly applied in some wireless power transfer (WPT) systems where space position is limited. The existing method of calculating the mutual inductance between perpendicular coils is mainly applied to rectangular and circular coils. However, the practical rectangular coil often has rounded corners, so it unavoidably introduces systematic errors. Concerning this issue, this paper proposed an analytical method to calculate the mutual inductance between mutually perpendicular round‐corner rectangular (RCR) coils. The proposed method is based on a second‐order vector potential (SOVP) model where the mutual inductance between the coils is described as a double integral formula. In this formula, a novel shape and position function is introduced. This shape and position function describes not only RCR coils but also rectangular (including square), circular, and runway ones. A series of experiments were used to validate the proposed method. According to the consistency validation, the proposed method can be more generalized for calculating the mutual inductance of rectangular and circular coils. Through experimental comparison, the proposed method computes the mutual inductance between the perpendicular coil in excellent agreement with the measured ones. Therefore, the proposed method unifies the mutual inductance calculation of mutually perpendicular circular, rectangular (square), runway, and RCR coils and can provide an important basis for designing WPT systems using the above coils.

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Section: Experimental Verificationmentioning

confidence: 99%

“…All relative misalignments ( ∆x , ∆y , ∆z ) between the coils were initially calibrated. The measurement method used was as described in the literature 39 …”

Section: Experiments and Verificationmentioning

confidence: 99%

A novel method for calculating the mutual inductance between two perpendicular coils in wireless power transfer

Feng

2023

Circuit Theory & Apps

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“…In this part, we will analyze the influence of the stepped winding shape and critical current increasing on the levitation performance of the EDS system with the analytical model from [25,26]. The basic parameters are shown in table 4.…”

Section: Analysis Of the Levitation Performancementioning

confidence: 99%

Design optimization of a stepped HTS magnet for electrodynamic suspension train

Li,

Liu,

Zhou

et al. 2023

Supercond. Sci. Technol.

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High-temperature superconducting (HTS) magnets are promising candidates for transportation and power systems, such as the electrodynamic suspension (EDS) train, ultra-high field magnet and magnetic resonance imaging, because of its large current-carrying capacity and low power loss. The critical current depending on magnetic flux density is an essential factor assessing the application performance of HTS magnet. The existing HTS magnet is wound with rectangular cross-section as usual, which results in magnetic field concentration inside winding. In this paper, we proposed a novel HTS magnet structure with stepped cross-section to alleviate the magnetic field concentration, and resultantly improve the critical current. From this point, this paper is aimed to design and optimize a stepped HTS magnet with the critical current maximized. Firstly, the structure design of the stepped HTS magnet is performed with a consideration of the application scenario of EDS train. Then, the critical current of the HTS magnet is estimated with a homogenized self-consistent model. Afterwards, an HTS magnet with stepped cross-section is optimized, fabricated and finally tested. The critical current was experimentally measured to verify the simulation results, followed by the electromagnetic investigations of the stepped HTS magnet in the EDS train.

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“…However, the on-board magnets have a complex support and present a large geometry size such that a large number of moving meshes are needed. Though its predictions are more precise, it is quite time-consuming [21,22]. Therefore, we proposed a semi-analytical method, combination of the dynamic circuit method and FEM, to analyze the electromagnetic force distribution of the on-board magnet under motion state.…”

Section: Electromagnetic Force Analysis During Travelingmentioning

confidence: 99%

R&D of on-board metal-insulation REBCO superconducting magnet for electrodynamic suspension system

Liu

Wang

Chen

et al. 2023

Supercond. Sci. Technol.

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Metal-insulation (MI) REBCO high-temperature superconducting (HTS) magnet has the advantages of short charging delay, low contact losses, and self-protection abilities, which shows important application prospects in many fields. Recently, Institute of Electrical Engineering, Chinese Academy of Sciences developed a prototype on-board MI HTS coil used for electrodynamic suspension (EDS) system working with an acceleration of beyond 8 g. To design a reliable engineering on-board magnet, specific Ic angle dependence data of short sample under different fields were fully considered to estimate the operating margin and losses accurately of the on-board magnet. A semi-analytical method, combination of the dynamic circuit method and finite element method (FEM), was used to analyze the dynamic electromagnetic force distribution inside the on-board magnet under motion state, in which the effect of the propulsion coils and the figure-eight-shaped coils were taken into considerations. Finally, a full-size MI DP racetrack coil was fabricated and tested in a liquid nitrogen bath. The test results meet the design requirements and verify the feasibility of the design, which provides an important reference for the experiment of on-board EDS with high acceleration in the future.

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Fast and Precise Calculation of Mutual Inductance for Electrodynamic Suspension: Methodology and Validation

Cited by 22 publications

References 28 publications

A novel method for calculating the mutual inductance between two perpendicular coils in wireless power transfer

A novel method for calculating the mutual inductance between two perpendicular coils in wireless power transfer

Design optimization of a stepped HTS magnet for electrodynamic suspension train

R&D of on-board metal-insulation REBCO superconducting magnet for electrodynamic suspension system

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