Superconducting Synchronous Motors for Electric Ship Propulsion

Torrey, D.A.; Parizh, Michael; Bray, J. W.; Stautner, W.; Tapadia, Nidhishri; Xu, Minfeng; Wu, Anbo; Zierer, Joseph

doi:10.1109/tasc.2020.2980844

Cited by 22 publications

(14 citation statements)

References 17 publications

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“…We have developed 3 MW HTS motor for ship propulsion [14][15][16][17][18][19][20][21][22][23][24]. The quench protection circuit was tested using one field pole of a rotor as shown in figure 3.…”

Section: Test Of a Quench Protection Circuit 31 Field Pole Of A 3 Mw ...mentioning

confidence: 99%

“…Therefore, the conventional quench protection method depends on the withstand voltage of the system. Generally, an extremely high withstand voltage is required for quench protection [14]. A method that can quickly attenuate the current flowing through the HTS coils even at lower applied voltages is required.…”

Section: Introductionmentioning

confidence: 99%

“…The electromagnetic energy stored in the HTS coils is absorbed in the dispersed parts and the dump resistors can be made smaller and easier to install on a HTS ship propulsion motor. We have fabricated a quench protection circuit for the HTS field pole of a 3 MW HTS motor developed by Kawasaki Heavy Industries [14][15][16][17][18][19][20][21][22][23][24]. The fabricated quench protection circuit was tested successfully and demonstrated to be effective in quench protection.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and test results of a novel quench protection circuit for a HTS ship propulsion motor

Murase¹,

Izumi²,

Umemoto³

et al. 2021

Eng. Res. Express

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This paper describes a novel configuration of a quench protection circuit for a high-temperature superconducting (HTS) ship propulsion motor that can protect the HTS coils from an unexpected outage in its cryogenic cooling system. The quench protection circuit consists of conductor parts placed adjacent to the HTS coils and dump resistors and diodes placed in the cryogenic-temperature and normal-temperature areas, respectively. The conductor parts are shaped and arranged such that the magnetic coupling with the HTS coil is extremely large. Thereby, the current of the HTS coils can be instantaneously attenuated immediately after the quench protection is activated. With this configuration, the electromagnetic energy of the HTS coils can be absorbed in the dispersed parts. This can make the dump resistors smaller and make it easier to install them on a HTS ship propulsion motor. By analysing the equivalent electric circuit model of the protection circuit, we derived the conditions under which instantaneous current attenuation of the HTS coil occurs. In accordance with the conditions, we have fabricated a quench protection circuit that protects one HTS field pole of the 3 MW HTS motor developed by Kawasaki Heavy Industries. The fabricated circuit was empirically evaluated and proved to be highly effective in quench protection. The present quench protection circuit technology contributes to the practical application of HTS ship propulsion motors.

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Section: Test Of a Quench Protection Circuit 31 Field Pole Of A 3 Mw ...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and test results of a novel quench protection circuit for a HTS ship propulsion motor

Murase¹,

Izumi²,

Umemoto³

et al. 2021

Eng. Res. Express

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show abstract

“…The development of High-Temperature Superconductors (HTSs) such as the cuprate family with the REBaCuO superconductors (Rare Earth elements (RE)), the Iron-Based Superconductors (IBS) with the Pnitide and Chalcogen families and the MgB 2 compound allow a quick evolution of superconducting devices for many applications. Among them, lead by ecological, economical, and practical needs, the electrical machines associated with superconducting materials such as electromagnet [1], permanent magnets [2][3][4][5], or windings [6,7] look increasingly more attractive for future transports such as electrical ships [8], aircraft [9][10][11], and levitation trains [12] for the high specific power potential of HTS machines. Indeed, for the aviation sector in particular, the growing need for electrical power on board requires the development of electrical machines with a target power-to-weight ratio of 20 kW/kg for MW class machines [4,13,14].…”

Section: Introductionmentioning

confidence: 99%

Review on the Use of Superconducting Bulks for Magnetic Screening in Electrical Machines for Aircraft Applications

et al. 2021

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High-Temperature Superconductors (HTS) considerably accelerate the development of superconducting machines for electrical engineering applications such as fully electrical aircraft. This present contribution is an overview of different superconducting materials that can be used as magnetic screens for the inductor of high specific power electrical machines. The impact of the material properties, such as the critical temperature (Tc) and the critical current density (Jc), on the machine performances is evaluated. In addition, the relevance to flux modulation machines of different HTS bulk synthesis methods are addressed.

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“…In addition, the HTS homopolar machine has been studied for an aircraft application because it is suitable for high-speed operation [9]. In general, HTS coils are used as field windings in HTS motors and generators, and among them, they are being studied as field windings of synchronous machines due to the characteristics of superconductors that cause AC Energies 2021, 14, 5658 2 of 17 loss in time-varying currents [10][11][12]. The most common HTS-synchronous machine is a type in which HTS field coils are installed on a non-magnetic rotor core.…”

Section: Introductionmentioning

confidence: 99%

Design and Characteristic Analysis of a Homopolar Synchronous Machine Using a NI HTS Field Coil

Hwang

2021

Energies

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This paper deals with a homopolar synchronous machine (HSM) applying high-temperature superconducting (HTS) field coils. Superconductors, especially high-temperature superconductors, have high potential as advanced materials for next-generation electrical machines due to their high critical current density and excellent mechanical strength. However, coils made with high-temperature superconductors have a high risk of being damaged in the event of a quench due to the intrinsic low normal zone propagation velocity (NZPV). Therefore, the coil protection issue has been regarded as one of the most important research fields in HTS coil applications. Currently, the most actively studied method for quench protection of the HTS coils is the no-insulation (NI) winding technique. The NI winding technique is a method of winding an HTS coil without inserting an insulating material between turns. This method can automatically bypass the current to the adjacent turn when a local quench occurs inside the HTS coil, greatly improving the operating stability of the HTS coils. Accordingly, many institutions are conducting research to develop advanced electrical machines using NI HTS coils. However, the NI HTS coil has its intrinsic charge/discharge delay problem, which makes it difficult to successfully develop electrical machines using the NI HTS coil. In this study, we investigated how this charging/discharging problem appeared when the NI HTS coil was used in an HTS homopolar synchronous machine (HSM) which is one of the electrical machines with a high possibility of applying the HTS coil in the future because it has a stationary field coil structure. For this, the characteristic resistances of HTS coils were experimentally obtained and applied to the simulation model.

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Superconducting Synchronous Motors for Electric Ship Propulsion

Cited by 22 publications

References 17 publications

Design and test results of a novel quench protection circuit for a HTS ship propulsion motor

Design and test results of a novel quench protection circuit for a HTS ship propulsion motor

Review on the Use of Superconducting Bulks for Magnetic Screening in Electrical Machines for Aircraft Applications

Design and Characteristic Analysis of a Homopolar Synchronous Machine Using a NI HTS Field Coil

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