Conventional and HTS disc motor with pole variation control

Inácio, David; Inácio, Steve André Pereira; Pina, João Murta; Valtchev, Stanimir; Neves, Mário Ventim; Martins, João; Rodrigues, A L

doi:10.1109/powereng.2009.4915250

Cited by 5 publications

(4 citation statements)

References 9 publications

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“…With the use of power converters, independent supply phases may be generated [23], which, together with an appropriate armature design [24], allows designing versatile control systems, as exemplified in [25]. Maximum operation in torque/speed space is achieved if frequency variation is associated with changing the number of magnetic poles of the motors, as described in [26].…”

Section: A Control Strategymentioning

confidence: 99%

Research and Development of Alternative Concepts in HTS Machines

Pina¹,

Inácio²,

Luis

et al. 2011

IEEE Trans. Appl. Supercond.

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High temperature superconducting (HTS) machines are recognized to offer several advantageous features when comparing to conventional ones. Amongst these, highlights the decrease in weight and volume of the machines, due to increased current density in conductors or the absence of iron slots' teeth; or the decrease in AC losses and consequent higher efficiency of the machines, even accounting for cryogenics. These concepts have been already demonstrated and some machines have even achieved commercial stage. In this paper, several alternative approaches are applied to electrical motors employing HTS materials. The first one is an all superconducting linear motor, where copper conductors and permanent magnets are replaced by Bi-2223 windings and trapped flux magnets, taking advantage of stable levitation due to flux pinning, higher current densities and higher excitation field. The second is an induction disk motor with Bi-2223 armature, where iron, ironless and hybrid approaches are compared. Finally, an innovative command strategy, consisting of an electronically variable pole pairs' number approach, is applied to a superconducting hysteresis disk motor. All these concepts are being investigated and simulation and experimental results are presented.

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Section: A Control Strategymentioning

confidence: 99%

Research and Development of Alternative Concepts in HTS Machines

Pina¹,

Inácio²,

Luis

et al. 2011

IEEE Trans. Appl. Supercond.

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“…Electrical machines with HTS bulk rotor present a complex behavior, showing both synchronous and asynchronous regimes [5], [7]. Even though they are similar to conventional hysteresis motors, their operating principle is different.…”

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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“…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%

“…The topology, fabricated issues and the operating principle of both the conventional induction and HTS hysteresis disk motors can be found in [27], [28].…”

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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Conventional and HTS disc motor with pole variation control

Cited by 5 publications

References 9 publications

Research and Development of Alternative Concepts in HTS Machines

Research and Development of Alternative Concepts in HTS Machines

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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