Electrical characteristics of fully superconducting synchronous generator in persistent excitation mode

Muta, Itsuya; Tsukiji, Hiroshi; Hoshino, Tsutomu; Mukai, Eiichi

doi:10.1109/20.119904

Cited by 9 publications

(4 citation statements)

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“…There were several suggestions towards large utility fully superconducting generators using LTS (86,87) and a very limited number of laboratory scale projects of fully superconducting machines using HTS conductors (88). The obvious advantage of fully HTS SM is higher electric loading of HTS armature (89).…”

Section: Fully Hts-smmentioning

confidence: 99%

Superconducting wind turbine generators

Abrahamsen¹,

Mijatović

Seiler³

et al. 2010

Supercond. Sci. Technol.

196

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We have examined the potential of 10 MW superconducting direct drive generators to enter the European offshore wind power market and estimated that the production of about 1200 superconducting turbines until 2030 would correspond to 10% of the EU offshore market. The expected properties of future offshore turbines of 8 and 10 MW have been determined from an up-scaling of an existing 5 MW turbine and the necessary properties of the superconducting drive train are discussed. We have found that the absence of the gear box is the main benefit and the reduced weight and size is secondary. However, the main challenge of the superconducting direct drive technology is to prove that the reliability is superior to the alternative drive trains based on gearboxes or permanent magnets. A strategy of successive testing of superconducting direct drive trains in real wind turbines of 10 kW, 100 kW, 1 MW and 10 MW is suggested to secure the accumulation of reliability experience. Finally, the quantities of high temperature superconducting tape needed for a 10 kW and an extreme high field 10 MW generator are found to be 7.5 km and 1500 km, respectively. A more realistic estimate is 200–300 km of tape per 10 MW generator and it is concluded that the present production capacity of coated conductors must be increased by a factor of 36 by 2020, resulting in a ten times lower price of the tape in order to reach a realistic price level for the superconducting drive train.

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Section: Fully Hts-smmentioning

confidence: 99%

Superconducting wind turbine generators

Abrahamsen¹,

Mijatović

Seiler³

et al. 2010

Supercond. Sci. Technol.

196

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“…The models with rating power of the order of 10 kW have been built until now. 26,47,48) 6.4 Superconducting Linear Induction Motor (SLIM) A superconducting linear induction motor (SLIM) can provide much higher trust in devices with wide air gap than a conventional linear induction motor. This is due to the same reason as in superconducting and con ventional magnet with big working volume i.e.…”

Section: Superconducting Power Trans Former (Spt)mentioning

confidence: 99%

AC Applications of Superconductors at 50/60 Hz Frequency.

Hlasnik

Ito

1993

Journal of the Cryogenic Society of Japan

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This paper presents a review of the research and development of low loss AC composites with very fine superconducting filaments as well as of their applications at 50/60Hz frequency. At first a review of formulae for calculating AC losses in a superconducting multifilamentary composite (MFC) placed in an AC external transverse magnetic field is given and the energetical feasibility criterion for an AC superconducting winding is formulated. Then it is shown how this criterion has influenced the development of AC MFC. Short description of the technology and of characteristic parameters of actually produced AC MFC, cables and windings is presented. The results of feasibility studies and of R & D works on superconducting AC devices and ma chines such as superconducting fault current limiter, power transformer, fully superconducting generator, linear induction motor, magnetic energy storage system and thermally controlled super conducting switches are reviewed. The quench current degradation of several kA-class cables as well as of epoxy impregnated windings with non-cylindrical form is the most important issue of the further development of superconductor applications at 50/60Hz frequency.

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“…Another way is to introduce current compensator that does not affect current stability and regulation. We selected the later approach because we already presented a linear-type magnetic flux pump (LTMFP) to achieve the superconducting power supply [4].…”

Section: Introductionmentioning

confidence: 99%

Current Pumping Performance of Linear-Type Magnetic Flux Pump With Use of Feedback Control Circuit System

Chung

Hoshino

Nakamura

2006

IEEE Trans. Appl. Supercond.

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It has already been investigated that current pumping of the linear-type magnetic flux pump (LTMFP) is controlled by frequency of 3-phase inverter. In this paper, based on these operating characteristics, a current compensator, which is composed of a LTMFP and a feedback control circuit system, has been introduced to compensate for the persistent current decay of the superconducting magnet. From the experiment, the current compensator has been demonstrated with the toroidal assembly of six Nb-Ti magnets 543 mH under the operating load current at 10 A.

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Electrical characteristics of fully superconducting synchronous generator in persistent excitation mode

Cited by 9 publications

References 0 publications

Superconducting wind turbine generators

Superconducting wind turbine generators

AC Applications of Superconductors at 50/60 Hz Frequency.

Current Pumping Performance of Linear-Type Magnetic Flux Pump With Use of Feedback Control Circuit System

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