Design and Modeling of 2G HTS Armature Winding for Electric Aircraft Propulsion Applications

Zhang, Min; Eastham, Fred; Yuan, Weijia

doi:10.1109/tasc.2016.2539548

Cited by 43 publications

(31 citation statements)

References 11 publications

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“…Experimental results are also compared with simulated results. The coils considered are intended to be used in a prototype axial flux motor; a model for considering the AC loss by coupling a machine model with a HTS model was proposed by M. Zhang et al [17]and will be used to verify the machine results in high-frequency propulsion situation.…”

Section: Introductionmentioning

confidence: 99%

AC Loss Comparison Between Multifilament and Nonstriated YBCO Coils Designed for HTS Propulsion Motors

Xing

Patel

Sun

et al. 2017

IEEE Trans. Appl. Supercond.

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In this paper, the properties of current capacity and AC transport loss of striated HTS coil is compared with ordinary HTS coil by using both experimental and simulation methods. The measurements were carried out by transporting a sinusoidal varying current at 77K, with an amplitude range of 10-50A in frequency from 70Hz up to 300Hz. Measurement facilities and methods are explained in more detail in the paper. The critical current of the 4mm width multi-filament coil made with 4 filaments at a spacing 0.03mm was found to be lower than that of the non-striated coil. The frequency dependent characteristics agreed well in both experimental and simulated results. Reducing AC loss of HTS is one enabling factor for widespread adoption of the technology and therefore understanding its characteristics is important and discussed in this paper. Future plans based on this preliminary work is the testing of multi-filament tapes in an axial flux motor field environment. 

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Section: Introductionmentioning

confidence: 99%

AC Loss Comparison Between Multifilament and Nonstriated YBCO Coils Designed for HTS Propulsion Motors

Xing

Patel

Sun

et al. 2017

IEEE Trans. Appl. Supercond.

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“…The high temperature superconductor (HTS) (RE)Ba2Cu3Ox (REBCO) is a widely applied on many industrial applications because of its high current density and cost reduction potential [1][2][3][4][5][6]. HTS machines shows great advantages on high power density, compact structure and lightweight, thus is a promising candidate for wind generator and future electrical aircraft propulsion [7][8][9][10][11]. However, REBCO coils have always suffered the problem of low thermal stability and quench damages [12,13].…”

Section: Introductionmentioning

confidence: 99%

AC losses of no-insulation high temperature superconductor (RE)Ba2Cu3Ox coils induced by ripple magnetic fields in machines

Wang¹

2020

Preprint

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<p>No-insulation high temperature superconductor (NI HTS) (RE)Ba2Cu3Ox coil technology is effective in enhancing the thermal stability of HTS coils. Applying the NI technique on the rotor windings of HTS machines can improve the stability and reliability of the machines. However, the NI HTS rotor windings experience ripple magnetic fields, which leads to induced eddy currents through the turn-to-turn contacts. The accompanying turn-to-turn losses will considerably affect the machine efficiency. In this study, we compared experimentally the losses of NI HTS coils subjected to external AC magnetic fields with those of insulated coils. Measurement system based on calibration-free method is developed for the AC loss measurement on HTS coils exposed to external AC magnetic fields. The results show that the AC loss of NI HTS coils can be 20 times higher than that of insulated HTS coils, and lowering turn-to-turn resistivity can significantly reduce this AC loss. Modeling analysis shows that most of induced current flows in the outer turns of the NI HTS coil because of skin effect, and lower turn-to-turn resistivity leads to higher induced current in superconducting layers and more significant accumulation of turn-to-turn loss. This will increase quench risk. Optimization of turn-to-turn resistivity is required when the NI HTS coil is applied in the machines environments. </p>

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“…EVERAL high temperature superconducting (HTS) materials, including Bi-2212, Bi-2223, and (Re)Ba2Ca3O7-x (ReBCO) coated conductors, are widely used in some industrial HTS power applications (e.g., motors/generators, transformers, fault current limiters and transmission cables), due to their high current carrying capacity and high critical magnetic fields [1][2][3]. The power grid and high field magnets have called for practical HTS cables with high current and low inductance [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Quench of a Single-Layer ReBCO CORC Cable With Non-Uniform Terminal Contact Resistance

Zhu

Wang

Xing

et al. 2019

IEEE Trans. Appl. Supercond.

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ReBCO conductor-on-round-core (CORC) cable has become a promising candidate for high temperature superconducting (HTS) power applications, due to its great mechanical strength, high current carrying capacity, high flexibility and low AC losses. However, ReBCO coated conductors are at risk of quenching, which significantly affects the thermal stability and reliability of the CORC cable. Three-dimensional (3D) numerical study on the quench behavior of the CORC cable remains a challenge, for its complex geometry is difficult to cope with. In this paper, a 3D timedependent multi-physics quench model based on the T-A formulation has been developed. Three modules are coupled in this model; The T-A formulation model, a heat transfer model and an equivalent circuit model. The quench behavior of a single-layer ReBCO CORC cable with non-uniform terminal contact resistances has been studied, when a hotspot is imposed on one of the tapes to induce a local quench. Results show that, the CORC cable has the highest MQE, in another word, is most stable, when the hotspotinduced quench occurs on the tape with the middle value of terminal contact resistance.

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Design and Modeling of 2G HTS Armature Winding for Electric Aircraft Propulsion Applications

Cited by 43 publications

References 11 publications

AC Loss Comparison Between Multifilament and Nonstriated YBCO Coils Designed for HTS Propulsion Motors

AC Loss Comparison Between Multifilament and Nonstriated YBCO Coils Designed for HTS Propulsion Motors

AC losses of no-insulation high temperature superconductor (RE)Ba2Cu3Ox coils induced by ripple magnetic fields in machines

Quench of a Single-Layer ReBCO CORC Cable With Non-Uniform Terminal Contact Resistance

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