Hysteresis and reluctance electric machines with bulk HTS elements. Recent results and future development

Kovalev, L.K.; Ilushin, K.V.; Penkin, V.T.; Kovalev, Konstantin; Koneev, S.M.A.; Poltavets, V. N.; Larionoff, A. E.; Modestov, K. A.; Larionoff, S. A.; Gawalek, W.; Habisreuther, T.; Oswald, B.; Best, K.-J.; Strasser, T.

doi:10.1088/0953-2048/13/5/313

Cited by 29 publications

(22 citation statements)

References 2 publications

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“…Hence, they can not be used for modulation purposes. Therefore the SC shields can be used as flux barriers in variable reluctance motors [2] to increase the saliency ratio or to allow flux concentration. From this last idea, an original topology of Manuscript inductor, Fig.…”

Section: Introductionmentioning

confidence: 99%

A Fast Analytical Method to Compute the Radial Flux Density Distribution in the Airgap of a Superconducting Inductor

Male

Mezani²,

Lubin³

et al. 2011

IEEE Trans. Appl. Supercond.

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An original topology of superconducting rotating machine propose to use the diamagnetism of high temperature superconducting (HTS) bulk. Here, YBCO bulks allow to shield the magnetic field created by two solenoids supplied by dc currents in contra-directions. The obtained airgap field is multipolar as in conventional ac machines. A quick analytical method is developed here to compute the magnetic field distribution. It is based on the determination of the modulating function associated with the radial flux density distribution resulting from the introduction of the superconducting bulks. A first step allows the calculation of the modulating function by a 2D analytical method (using the resolution of Laplace's and Poisson's equations by the separation of variables technique). The later is used in a second step together with the field produced by the two solenoids to calculate the radial flux density distribution in the airgap of the considered inductor. Comparisons to experiments and to 3D FE results show the validity of the proposed approach with the benefit of low computation time.

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Section: Introductionmentioning

confidence: 99%

A Fast Analytical Method to Compute the Radial Flux Density Distribution in the Airgap of a Superconducting Inductor

Male

Mezani²,

Lubin³

et al. 2011

IEEE Trans. Appl. Supercond.

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“…Among them, Superconducting Synchronous Reluctance Motors (ScSynRM) are studied and tested in different companies and research institutes [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

2D analytical modeling of a wholly superconducting synchronous reluctance motor

Male¹,

Lubin²,

Mezani³

et al. 2011

Supercond. Sci. Technol.

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An analytical computation of the magnetic field distribution in a wholly superconducting synchronous reluctance motor is proposed. The stator of the studied motor consists of three-phase HTS armature windings fed by AC currents. The rotor is made with HTS bulks which present the specificity to have a diamagnetic behavior under zerofield cooling. The electromagnetic torque is obtained by the interaction between the rotating magnetic field created by the HTS windings and the HTS Bulks. The proposed analytical model is based on the resolution of Laplace's and Poisson's equations (by the separation of variables technique) for each sub-domain, i.e. stator windings, air-gap, holes between HTS bulks and exterior iron shield. For the study, the HTS bulks are considered as perfect diamagnetic materials. The boundary and continuity conditions between each sub-domains yield to the global solution. Magnetic field distributions and electromagnetic torque obtained by the analytical method are compared with those obtained from finite element analyses.

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“…Several HTS electrical machines have been built in the past as, e.g. homopolar [2], [3] or synchronous machines [4]- [7], or fractional horsepower motors such as reluctance [8], [9] or hysteresis motors [10], [11]. Other concepts have been applied, as trapped-flux motors, see e.g.…”

Section: Introductionmentioning

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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Hysteresis and reluctance electric machines with bulk HTS elements. Recent results and future development

Cited by 29 publications

References 2 publications

A Fast Analytical Method to Compute the Radial Flux Density Distribution in the Airgap of a Superconducting Inductor

A Fast Analytical Method to Compute the Radial Flux Density Distribution in the Airgap of a Superconducting Inductor

2D analytical modeling of a wholly superconducting synchronous reluctance motor

Research and Development of Alternative Concepts in HTS Machines

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