Analysis of the Mechanical Characteristics of a 17-MW-Class High-Temperature Superconducting Synchronous Motor

Kim, Ji Hyung; Park, Sail; Le, Thanh Dung; Jo, Hyun Chul; Jo, Young-Sik; Choi, Yoon Hyuck; Lee, Haigun; Kim, Ho Min

doi:10.1007/s10948-014-2810-y

Cited by 13 publications

(7 citation statements)

References 5 publications

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“…Generator efficiency considering the electrical losses and mechanical loss was approximately 96.3 % and volume and weight of generator related to wind turbine construction in economic and technical aspects were estimated to 127.45 ton, 40.74 m 3 , respectively. As results of electrical characteristics analysis of HTS generator, THD and voltage regulation of generator were 2.36 and 3.65%, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…A mechanical shield which accounts for the large volumes among configuring part of generator and a rotating shaft with a high mass density material for the mechanical strength of rotor take up about 65% of the generator weight. Also, the total volume of generator is calculated to 40.74 m 3 . One HTS field pole for the 10-MW-class synchronous generator consists of eight layers of double-pancake (DP) coils with an insulating plate in between two pancake coils and is shown in Fig.…”

Section: Electromagnetic Designmentioning

confidence: 99%

“…From the direction of the HTS wire width (ab-plane), the Lorentz force generated in the HTS field coil caused by the magnetic field in the -parallel direction (B//ab) creates a radial stress and hoop stress along the curve parts HTS field coil. Additionally, the compressive force acts as a shear stress because of the perpendicular (B//c) magnetic field [3]. Lorentz force (F r ) acts as a radial direction at the curve part of HTS field coils because of maximum value of parallel magnetic flux density (11.15 T) as shown in Fig.…”

Section: Electromagnetic Analysismentioning

confidence: 99%

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3D electromagnetic design and electrical characteristics analysis of a 10-MW-class high-temperature superconducting synchronous generator for wind power

Kim¹,

Park²,

Le³

et al. 2014

Progress in Superconductivity and Cryogenics

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In this paper, the general electromagnetic design process of a 10-MW-class high-temperature superconducting (HTS) synchronous generator that is intended to be utilized for large scale offshore wind generator is discussed. This paper presents three-dimensional (3D) electromagnetic design proposal and electrical characteristic analysis results of a 10-MW-class HTS synchronous generator for wind power. For more detailed design by reducing the errors of a two-dimensional (2D) design owing to leakage flux in air-gap, we redesign and analyze the 2D conceptual electromagnetic design model of the HTS synchronous generator using 3D finite element analysis (FEA) software. Then electrical characteristics which include the no-load and full-load voltage of generator, harmonic contents of these two load conditions, voltage regulation and losses of generator are analyzed by commercial 3D FEA software.

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Section: Discussionmentioning

confidence: 99%

Section: Electromagnetic Designmentioning

confidence: 99%

Section: Electromagnetic Analysismentioning

confidence: 99%

See 1 more Smart Citation

3D electromagnetic design and electrical characteristics analysis of a 10-MW-class high-temperature superconducting synchronous generator for wind power

Kim¹,

Park²,

Le³

et al. 2014

Progress in Superconductivity and Cryogenics

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“…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.…”

mentioning

confidence: 99%

“…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.…”

mentioning

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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Distribution of Trapped Magnetic Flux in Superconducting Stacks Magnetised by Angled Field

Smara

Climente-Alarcón

Glowacki

2019

J Supercond Nov Magn

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Some novel energy applications require the use of complex shapes of stacks of superconducting tapes as trapped-flux magnets. A trapped-flux magnet magnetised in a superconducting motor may experience an angled magnetising field rather than a field normal to its surface. This will affect the trapped magnetic flux distribution. This work presents the results of the numerical and experimental analyses of the stacks magnetised in an angled magnetic field. The finite element model using H-formulation is developed to compute the induced superconducting currents. The measurements are performed on stacks with different thicknesses and with different orientations against a magnetising field. The resulting distribution of the magnetic flux as well as the electric currents is computed, presented and discussed in details. The importance of the observed distribution patterns is assessed in the context of the implementation of such stacks in a fully superconducting electric motor.

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Analysis of the Mechanical Characteristics of a 17-MW-Class High-Temperature Superconducting Synchronous Motor

Cited by 13 publications

References 5 publications

3D electromagnetic design and electrical characteristics analysis of a 10-MW-class high-temperature superconducting synchronous generator for wind power

3D electromagnetic design and electrical characteristics analysis of a 10-MW-class high-temperature superconducting synchronous generator for wind power

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

Distribution of Trapped Magnetic Flux in Superconducting Stacks Magnetised by Angled Field

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