Numerical and experimental comparison of electromechanical properties and efficiency of HTS and ferromagnetic hysteresis motors

Inácio, David; Inácio, S; Pina, João Murta; Goncalves, A.M.D.; Neves, Mário Ventim; Rodrigues, António

doi:10.1088/1742-6596/97/1/012218

Cited by 10 publications

(9 citation statements)

References 2 publications

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“…On the other hand, the exploitation of hysteresis in high temperature superconducting materials, when this material builds the rotors of electric motors, results in higher torque values than those obtained in hysteresis motors with ferromagnetic rotors, i.e., higher power density is obtained in comparison with conventional hysteresis motor [3,4,5,6,7]. This higher power density allows considering applications like transportation or variable load winch drives, where the changing of power and torque are the normal operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Studies and Test Results of a Superconducting Hysteresis Motor with Multiphase Windings and Variable Number of Magnetic Poles

Dionísio¹,

Pina²,

Inácio³

et al. 2013

IFIP Advances in Information and Communication Technology

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Abstract. In this paper a procedure for determining the number of different synchronous speeds that can be obtained from the stator of a drum motor as a function of the number of slots is presented. This preliminary study is foreseen for a hysteresis high-temperature superconducting motor, but the approach is directly applied in conventional motors. The targeted device has multiphase windings, in order to achieve full flexibility in torque-speed space through electronic variation of magnetic poles. Simulations are performed in order to achieve a qualitative understanding of the behaviour of the motor, namely in what concerns to torque and settling times from initial to synchronous speed. A prototype with eighteen slots in the stator and a bulk YBCO rotor is described and built, and experimental values of torque are obtained.

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Section: Introductionmentioning

confidence: 99%

Preliminary Studies and Test Results of a Superconducting Hysteresis Motor with Multiphase Windings and Variable Number of Magnetic Poles

Dionísio¹,

Pina²,

Inácio³

et al. 2013

IFIP Advances in Information and Communication Technology

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“…Almost null DC resistivity, high current transportation capability and trapping flux capability, enables increasing efficiency several electrical applications [1][2][3][4]. These advantages allow the developing of superconducting electrical machines with higher specific torque than their conventional counterparts [5], [11][12].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, the relations between the equivalent circuit's parameters and the motor's characteristics are discussed, for a conventional induction disk motor and for a HTS hysteresis disk motor, composed by a rotor with a polycrystalline YBCO disk [12]. This will be made using the Steinmetz-type "T" model.…”

Section: Introductionmentioning

confidence: 99%

Axial Disc Motor Experimental Analysis Based in Steinmetz Parameters

Inácio¹,

Martins²,

Neves³

et al. 2011

Technological Innovation for Sustainability

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Nowadays an economical and environment crisis is felt in the world due to the increasing fuel prices and high CO 2 emissions. This crisis is mostly due to present the transportation system, which uses internal combustion engines. The development and integration of electrical motors with improved electro mechanical characteristics, using high temperature superconductors, can provide a sustainable future replacing the conventional internal combustion motors. An axial type disc motor, with high temperature superconductor (HTS) material has been developed and tested in order to obtain an electrical equivalent circuit based on the experimental results. The tested HTS motor exhibits a conventional hysteresis motor type of behavior, even though the hysteretic phenomena don't have the same principle. The proposed approach allows the description of the equivalent electrical circuit as a conventional hysteresis motor.

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“…However flux density is limited due to magnetic saturation. HTS materials can carry large current within smaller sections, presenting higher specific torque (torque per volume) than their conventional counterparts, providing also some interesting and benefic levitation phenomena [26], [34]- [36]. Several types of machinery were optimized based on HTS materials (hysteresis [11]- [15], variable reluctance [16]- [19] and trapped flux [20]).…”

mentioning

confidence: 99%

“…Electrical machines with bulk HTS rotor present a complex behavior, showing both synchronous and asynchronous regimes. In this sense they are similar to hysteresis motors, although the operating principle is different [26], [28], [36]. It is appropriate to study the behavior of superconducting hysteresis motors in asynchronous regime using Steinmetz-type models, in order to compare it with the conventional induction motor and to clarify the effect of the HTS bulk material in this regime.…”

mentioning

confidence: 99%

Experimental Characterization of a Conventional (Aluminum) and of a Superconducting (YBCO) Axial Flux Disc Motor

Inácio

Pina

Luis

et al. 2011

IEEE Trans. Appl. Supercond.

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An equivalent model and electromechanical characteristics for the disk motor was obtained based on the Steinmetz parameters. This paper describes a series of tests conducted on an axial flux motor, equipped with an aluminum rotor disc and an YBCO high temperature superconducting rotor disc, at liquid nitrogen temperature (77 K). The rotating magnetic field was produced by a four-pole, three-phase stator winding, at 50 Hz. At asynchronous permanent regime, Steinmetz-type models are able to describe both motors' behavior. From the performed tests, the parameters of both motors' models were deduced. A variable load was used to obtain both motor's characteristics (conventional and superconducting). Experimental obtained characteristics of both motors are compared with the ones predicted from parameters' calculation. The HTS motor provides high efficiency then the conventional ones.Index Terms-Axial flux disc motor, HTS materials, YBCO.

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Numerical and experimental comparison of electromechanical properties and efficiency of HTS and ferromagnetic hysteresis motors

Cited by 10 publications

References 2 publications

Preliminary Studies and Test Results of a Superconducting Hysteresis Motor with Multiphase Windings and Variable Number of Magnetic Poles

Preliminary Studies and Test Results of a Superconducting Hysteresis Motor with Multiphase Windings and Variable Number of Magnetic Poles

Axial Disc Motor Experimental Analysis Based in Steinmetz Parameters

Experimental Characterization of a Conventional (Aluminum) and of a Superconducting (YBCO) Axial Flux Disc Motor

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