Design of a 10-MW-Class HTS Homopolar Generator for Wind Turbines

Jeong, Jihoon; An, Dong-kyun; Hong, Jung-Pyo; Kim, Hae-Joong; Jo, Young-Sik

doi:10.1109/tasc.2017.2669140

Cited by 30 publications

(14 citation statements)

References 8 publications

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“…Therefore, in order to develop a robust electric motor using an NI coil, the effects by these charge and discharge delays should be considered. Various researchers have attempted to apply HTS coils to electrical machines, such as motors and generators [26][27][28][29][30][31][32][33]. Specifically, these studies are more actively carried out in relation to electrical rotating machines, which require high output power levels, such as those used for wind power generation and in electric vehicle applications.…”

Section: Introductionmentioning

confidence: 99%

“…In electrical rotating machines with an air-core structure, the superconducting field coils are positioned in the rotor to create a rotating field. Therefore, in the rotating field coil structure, the cooling system and the excitation system are inevitably complicated, and require a highly reliable design [31][32][33][34]. In the rotor excitation machine, the field current must be fed through the slip ring and brushes, and the cooling system requires dynamic seals for cryogenic transfer coupling.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the FSM with stationary HTS field coils is becoming more attractive, given its advantages of a robust rotor and a reliable machine structure [32][33][34][35][36][37][38]. Various researchers have attempted to apply HTS coils to electrical machines, such as motors and generators [26][27][28][29][30][31][32][33]. Specifically, these studies are more actively carried out in relation to electrical rotating machines, which require high output power levels, such as those used for wind power generation and in electric vehicle applications.…”

Section: Introductionmentioning

confidence: 99%

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A Flux-Controllable NI HTS Flux-Switching Machine for Electric Vehicle Applications

2020

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This paper deals with a flux-controllable NI HTS flux-switching machine (FSM) for electric vehicle (EV) applications. In a variable-speed rotating machine for EVs, such as electric buses, electric aircraft and electric ships, an electric motor capable of regulating the flux offers the advantage of constant output operation. In general, conventional HTS rotating machines have excellent flux-regulation performance, because they excite an HTS field coil. However, it is difficult to ensure any flux-regulation capabilities in HTS rotating machines using HTS field coils that apply the no-insulation (NI) winding technique, due to the inherent charge and discharge delays in these machines. Nevertheless, the NI winding technique is being actively researched as a key technology for the successful development of HTS rotating machines, because it can dramatically improve the operational stability of HTS field coils. Therefore, research to implement an HTS rotating machine with flux-regulation capabilities, while improving the operating stability of the HTS field coil using the NI winding technique, is required for EV applications. In this paper, we propose an HTS rotating machine with a flux switching structure, a type of topology of a rotating machine that is being actively studied for application to the electric motors used in EVs. The proposed HTS flux-switching machine (FSM) uses NI field coils, but additional field windings are applied for flux regulation, which enables flux control. In this study, an NI HTS field coil was also fabricated and tested because the characteristic resistance value should be used for the design and characteristic analyses of machines which utilize an NI coil. The simulation model used to analyze the flux-regulation performance capabilities of the NI HTS FSM were devised based on the characteristic resistance values obtained from a charging test of the fabricated NI HTS field coil. This study can provide a good reference for further research, including work on the manufacturing of a prototype NI HTS FSM for EV applications, and it can be used as a reference for the development of other HTS rotating machines, such as those used in large-scale wind power generation, where flux-regulation capabilities are required.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Flux-Controllable NI HTS Flux-Switching Machine for Electric Vehicle Applications

2020

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“…A cryogenic vessel structure has been proposed for cooling HTS field coils [15]. In recent years, extensive research has been carried out toward the performance improvement of the HTS generator both (i) in the electrical and mechanical design [16], (ii) in increasing the operating temperature [17], (iii) in developing totally or partially superconducting generator [18]. The analysis of the technical performance and the life cycle assessment have also been analyzed and explored in [19].…”

Section: Introductionmentioning

confidence: 99%

Future Power Distribution Grids: Integration of Renewable Energy, Energy Storage, Electric Vehicles, Superconductor, and Magnetic Bus

Muttaqi

Islam

Sutanto

2019

IEEE Trans. Appl. Supercond.

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This paper focuses on a review of the state of the art of future power grids, where new and modern technologies will be integrated into the power distribution grid, and will become the future key players for electricity generation, transmission, and distribution. The current power grids are undergoing an unprecedented transformation from the original design, changing the way how energy has been produced, delivered, and consumed over the past century. This new energy era includes the integration of renewable sources such as wind and solar, supported by the distributed or community energy storage, to power distribution grids through innovative high-frequency magnetic links and power-electronic converters. The use of emission free transportation, such as electric vehicles, and energy efficient technologies, such as superconducting generators and storage systems, are also rapidly emerging and will be integrated into the power grids in the foreseeable future. However, it is necessary to reconsider the current paradigms of system analysis and plan with a focus on how to achieve the most flexible, efficient, and reliable power grid for the future-the one that enables operation in a domain which is very different than the current one to deliver the services to consumers at an affordable cost.

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“…The properties of superconductors, such as high current density, diamagnetic behavior and magnetic flux trapping, opened the door to large possibilities in terms of electrical machines design [1][2][3][4][5][6]. Their feasibility, however, is not trivial because of many constraints imposed by such materials.…”

Section: Introductionmentioning

confidence: 99%

New Type of Oversaturated Superconducting Machine

Smara¹,

Rezzoug²,

Lévêque³

et al. 2017

PIER M

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Abstract-This paper presents the principle and design of an experimental bench of an inductor of an oversaturated superconducting machine with radial flux density. A designed experimental bench is under construction to validate the computation and the principle of the inductor. Also, this work describes the encountered problems and lays out the tools that permit to study a high power oversaturated superconducting machine.

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Design of a 10-MW-Class HTS Homopolar Generator for Wind Turbines

Cited by 30 publications

References 8 publications

A Flux-Controllable NI HTS Flux-Switching Machine for Electric Vehicle Applications

A Flux-Controllable NI HTS Flux-Switching Machine for Electric Vehicle Applications

Future Power Distribution Grids: Integration of Renewable Energy, Energy Storage, Electric Vehicles, Superconductor, and Magnetic Bus

New Type of Oversaturated Superconducting Machine

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