Project of a HTS Synchronous Machine Emulated by a Linear Motor

Martins, Flávio Goulart dos Reis; Dias, D. H. N.; Ferreira, A.C.; Andrade, R. de

doi:10.1109/tasc.2014.2382340

Cited by 12 publications

(4 citation statements)

References 9 publications

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“…The total voltage across the terminals of the simulated coil is the multiplication of each turn electric field by its length, considering they are concentric circles, and summing, according to equation (8),…”

Section: Coil Experimental and Simulated V-i Curvesmentioning

confidence: 99%

“…Racetrack pancake coils are widely employed in superconducting machines [8][9][10][11] and active magnetic bearings [12][13][14] applications, where FE simulations are also a main step in designing prototypes. This justifies the development of a reliable alternative to model the anisotropic characteristics of 2G wires with respect to the magnetic flux density influence.…”

Section: Introductionmentioning

confidence: 99%

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Using the integral equations method to model a 2G racetrack coil with anisotropic critical current dependence

Martins

Sass

Barusco

et al. 2017

Supercond. Sci. Technol.

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Second-generation (2G) superconducting wires have already proved their potential in several applications. These materials have a highly nonlinear behavior that turns an optimized engineering project into a challenge. Between several numerical techniques that can be used to perform this task, the integral equations (IE) method stands out for avoiding mesh problems by representing the 2G wire cross-sectional area by a line. While most applications need to be represented in a 3D geometry, the IE is limited to longitudinal or axisymmetric models. This work demonstrates that a complex 3D geometry can be modeled by several coupled simulations using the IE method. In order to prove this statement, the proposed technique was used to simulate a 2G racetrack coil considering the self-field magnitude (B) and incidence angle (θ) on the tape. The J c characteristic was modeled in terms of parallel and normal to the tape plane magnetic field components (J c (B P , B ⊥ )) obtained from a V-I(B, θ) characterization of a tape segment. This result was implemented using commercial software with both A-V (vector magnetic potential and scalar voltage potential) and IE coupled simulations solved by finite elements. This solution bypasses the meshing problem due to the tapes slim geometry, considering each turn a single 1D model, all magnetically interacting in two 2D models. The simulations results are in good agreement to what was both expected and observed in the literature. The simulation is compared to the measured V-I characteristic for a single pancake racetrack coil built with same geometry as its simulation models, and a theoretical study demonstrates the possibilities of the proposed tool for analyzing a racetrack coil current density and electric field behavior in each of its turns.

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Section: Coil Experimental and Simulated V-i Curvesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using the integral equations method to model a 2G racetrack coil with anisotropic critical current dependence

Martins

Sass

Barusco

et al. 2017

Supercond. Sci. Technol.

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“…IGH temperature superconducting (HTS) technology has been attracted much attention worldwide in recent years due to its promising potential applications in power systems and transportation. For the application in transportation, it can be used to design HTS linear motors to provide linear motion drive for magnetic levitation trains [1][2][3][4][5]. An HTS linear motor with the integration of a magnetic suspension subsystem is able to provide merits of HTS magnetic suspension and linear motion drive.…”

Section: Introductionmentioning

confidence: 99%

Robust Design Optimization of a High-Temperature Superconducting Linear Synchronous Motor Based on Taguchi Method

Lei

Liu

et al. 2019

IEEE Trans. Appl. Supercond.

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This paper investigates the efficient robust design and optimization of a high-temperature superconducting (HTS) linear synchronous motor by using the Taguchi parameter design approach. The manufacturing tolerances of the HTS magnets, primary iron core and the air gap are considered in the robust design to ensure that the optimal design is less sensitive to these uncertainties. To overcome the disadvantages of the conventional Taguchi parameter design approach, a sequential Taguchi robust optimization method is presented for improvement of the motor performance and manufacturing quality. The proposed method is efficient because it holds the advantages of both Taguchi method and sequential optimization strategy. It can significantly increase the average thrust and decrease the thrust ripple of the investigated HTS linear synchronous motor.  Index Terms-High-temperature superconducting linear synchronous motor, manufacturing tolerances, optimization method, robust design, Taguchi method.

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“…More recently, De Bruyn et al presented a numerical modeling method based on the H-formulation for AC losses calculation in highly dynamic linear actuators with coated superconducting tapes [19]. In 2014, Martins et al fabricated a single pancake racetrack coil made of the coated superconducting tapes as field windings and the thrust against position under the quasi-static condition has been measured over a conventional copper stator [20]. These studies examined the basic characteristics of LSM with coated superconductor as a constituent and pointed us a promising way to upgrade the performance of LSM via replacing traditional field magnet mover with the coated superconducting coils.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical studies of a linear synchronous motor with the secondary made of coated superconductor

Liu

Cai

Gong

et al. 2019

Trans. Electr. Mach. Syst.

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Thrust tests of a linear synchronous motor (LSM) with its secondary made of coated superconducting coils were conducted via the built prototype over the traditional copper windings. A numerical model of the superconducting LSM was made and the measured data of experiment validate its reliability. The nonlinear resistivity of coated superconductor was electromagnetically modeled by resorting to the power law in conjunction with the constitutive relationship of conductor. Based on the numerical model, we carried out a set of transient studies to make a forecast about the superiority of the proposed high temperature superconducting (HTS) LSM, such as magnetic field distribution and the time evolution of thrust together with the speed in different loads and frequencies. The achieved results clearly confirm that the proposed HTS LSM has the advantages to work as a candidate for developing the high-thrust LSM with a large air gap.

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Project of a HTS Synchronous Machine Emulated by a Linear Motor

Cited by 12 publications

References 9 publications

Using the integral equations method to model a 2G racetrack coil with anisotropic critical current dependence

Using the integral equations method to model a 2G racetrack coil with anisotropic critical current dependence

Robust Design Optimization of a High-Temperature Superconducting Linear Synchronous Motor Based on Taguchi Method

Experimental and numerical studies of a linear synchronous motor with the secondary made of coated superconductor

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