Design of Synchronous Motor with High-temperature Superconductive Field Windings for Marine Propulsion Applications

Kashani, Mahsa Ghapandar; Hosseina, Majid; Darabi, Ahmad

doi:10.1080/15325008.2012.749552

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…Generally, it is difficult to establish analytical formulas for calculating AC losses of HTS coils like single superconducting tapes. These factors greatly aggravate the computational complexity of AC losses of HTS coils [8][9][10][11]. At present, there are still many difficulties in the simulation calculation of AC losses of HTS coils.…”

Section: Introductionmentioning

confidence: 99%

Research on AC losses of racetrack superconducting coils applied to high-temperature superconducting motors

Liu¹,

Wang²,

Wang³

et al. 2019

Supercond. Sci. Technol.

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Aiming to address the computational difficulties caused by the large width ratio of superconducting tapes, especially in calculating the AC losses of 3D superconducting coils, this paper proposes to study the AC loss laws of a 3D model of racetrack superconducting coil using the T–A equation group model. Firstly, the critical current of the superconducting coil is estimated based on the structure of the coil and the technical parameters of superconducting materials used in high-temperature superconducting (HTS) motors. The transmission AC losses of the superconducting coil under different n values, different transmission currents, different frequencies and different coil structure sizes are studied using T–A equations. Finally, the critical current test system and AC loss test system for HTS tapes and coils are set up. The critical current test and AC loss test for HTS tapes and coils are carried out, and the results are compared with those calculated by finite element method. The test results show the reliability of the T–A mathematical model, which can be used as a pre-valuation in engineering applications.

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Section: Introductionmentioning

confidence: 99%

Research on AC losses of racetrack superconducting coils applied to high-temperature superconducting motors

Liu¹,

Wang²,

Wang³

et al. 2019

Supercond. Sci. Technol.

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“…The continuous improvement of the properties of high temperature superconducting materials creates more opportunities for high power superconducting motors [1]. Compared with the conventional machines of same power, high temperature superconducting (HTS) motors have the advantages of small volume, light weight, high power density and being less expensive to operate because of their high current density, ironless design, high magnetic field, and high operating temperature [2][3][4][5][6][7]. The potentially significant size, weight, cost and efficiency benefits of superconducting machines, which are especially important factors in these applications such as electric propulsion in ships, Figure 1 shows the squirrel cage rotor exploded diagram of the proposed HTS induction motor, which is composed of cast aluminum bars, cast aluminum end rings, balance rings, silicon steel core and shaft.…”

Section: Introductionmentioning

confidence: 99%

A Superconducting Induction Motor with a High Temperature Superconducting Armature: Electromagnetic Theory, Design and Analysis

et al. 2018

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Large electric superconducting machines are being sought to solve emissions challenges in aircraft and provide a solution to >12 MW wind turbine electricity generation. Superconducting motors with only high temperature superconducting (HTS) armatures can offer advantages of high reliability, high power density, and high efficiency compared with conventional superconducting motors. In this paper, a novel HTS squirrel-cage induction motor is proposed for high speed operation, which adopts the structure of HTS windings with a certain inclination angle in the stator slots. Due to the limitation of curvature radius of superconducting tapes, the pitch of HTS windings can be only set to 1 and adopt the short pitch arrangement structure, which such design details of the HTS motor would ensure the superconducting coils can undertake larger current and reduce AC losses. In order to keep the HTS windings in superconducting state and larger current density, a special fixed cryogenic cooling system below 70 K with the method of gas extraction and decompression, which is made of aramid fiber, has been fabricated and the whole structure of the stator is placed in liquid nitrogen. According to the motor control principles and electromagnetic field theory, the electrical performances of the novel designed stator-HTS motor, which driven by the variable-voltage variable-frequency (VVVF) inverter, are analyzed including the flux density distributions, the torque, the induced electromotive force, losses and efficiency by using the finite element method. Finally, the components of HTS squirrel-cage induction motor have been manufactured according to the designed parameters. Next step, the motor will be assembled and tested.Energies 2018, 11, 792 2 of 15 all-electric aircraft propulsion, electric vehicles and wind generators, etc., will change the development direction of the electrical machinery industry [8][9][10][11][12][13][14].However, most superconducting machines adopt superconducting material as the rotor poles for the field to supply high air-gap magnetic flux density, consequently the HTS motor has high power density and has been studied by many researchers and institutions, but this structure brings some problems such as cooling, maintenance, mechanical speed and manufacture cost, etc., and this technology is also complex [15][16][17][18]. In addition, because the superconducting magnets face an air gap with a high flux density at all times, the magnetic flux density in the superconducting coils is also high. This will affect the critical current of the superconducting tapes, so the operation temperature of superconducting magnets must decrease to 20-30 K to eliminate this influence. Therefore, the costs of cooling increase.We have focused on the HTS induction motor [19][20][21][22], in which the superconducting material is only applied to the stator part. The HTS induction motors avoid the key problems of the rotor dynamic seal and the rotor mechanical strength compared with the conventional superconducting motor under the ...

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“…Number of concepts for direct drive WEC has been presented [4][5][6][7][8][9][10][11][12][13][14][15]. Caused by the relatively low vertical speeds of the marine waves and the desire for high output power, the generators share large sizes and hence, high magnetic forces such as cogging forces.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Multi-phase Tubular Permanent Magnet Linear Generator for Wave Energy Converters

Gargov

Zobaa

Pisică

2014

Electric Power Components and Systems

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Design of Synchronous Motor with High-temperature Superconductive Field Windings for Marine Propulsion Applications

Cited by 4 publications

References 13 publications

Research on AC losses of racetrack superconducting coils applied to high-temperature superconducting motors

Research on AC losses of racetrack superconducting coils applied to high-temperature superconducting motors

A Superconducting Induction Motor with a High Temperature Superconducting Armature: Electromagnetic Theory, Design and Analysis

Investigation of Multi-phase Tubular Permanent Magnet Linear Generator for Wave Energy Converters

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