Disk-shaped superconducting rotor for an axial flux induction motor

Álvarez, Alfredo; Cáceres, D. L.; Granados, X.; Pérez, B; Ceballos, J M

doi:10.1016/s0921-4534(03)01291-7

Cited by 12 publications

(11 citation statements)

References 3 publications

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“…In spite of our group has proposed this configuration time ago [6], it was impossible to get adequate coils to assembler the motor and during this time, the effects of the magnetic field over the disk were studied [7].…”

Section: Motor Configurationmentioning

confidence: 99%

Bipolar electrical coil based on YBCO bulks: initial tests

Álvarez

Ceballos

Pérez

et al. 2008

J. Phys.: Conf. Ser.

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In the field of the application of HTS in electrical motors, most prototypes are made using superconducting coils based on tape and located in the position where copper coils work in a similar conventional motor. Other prototypes use superconducting bulks (usually disk-shaped) in those positions where normal magnets should work in similar conventional motors. But it is very unusual to find designs using electrical coils based on bulks. This is a challenge whose main problem is the difficulty in machining the superconductor bulks to get the proper shape because of the impossibility of bending the material to wind coils. The design of a bipolar single-turn coil made from a superconducting YBCO disk was proposed by the group of Electrical Application of Superconductors, at the University of Extremadura, several years ago to be an element for the design of a modular two-phase inductor for an air core axial-flux motor. The shape of each coil looks like an 'S'. When a current flows through the circuit, two opposite magnetic fields appear in the upper and lower halves of the piece. Until now, attempts to get a good superconducting circuit by cutting a YBCO disk into the required shape have failed because of cracks appearing in the crystal during the process. Last year, our group at the University of Extremadura began to work with ATZ GmbH who have improved the machining process and made the coils. In this paper we present the coil and the first tests carried out.

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Section: Motor Configurationmentioning

confidence: 99%

Bipolar electrical coil based on YBCO bulks: initial tests

Álvarez

Ceballos

Pérez

et al. 2008

J. Phys.: Conf. Ser.

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“…Disc motors using HTS materials have been used mainly in two topologies: disc motors where the rotor elements of superconducting materials act as magnets [14] or motors where the rotor is a single superconductor disc presenting hysteresis behaviour composed, for example, by YBCO [15] or BSCCO [16].…”

Section: Electric Disc Motorsmentioning

confidence: 99%

Disc Motor: Conventional and Superconductor Simulated Results Analysis

Inácio¹,

Martins²,

Neves³

et al. 2010

IFIP Advances in Information and Communication Technology

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Abstract. Taking into consideration the development and integration of electrical machines with lower dimensions and higher performance, this paper presents the design and development of a three-phase axial flux disc motor, with 50 Hz frequency supply. It is made with two conventional semi-stators and a rotor, which can be implemented with a conventional aluminum disc or a high temperature-superconducting disc. The analysis of the motor characteristics is done with a 2D commercial finite elements package, being the modeling performed as a linear motor. The obtained results allow concluding that the superconductor motor provides a higher force than the conventional one. The conventional disc motor presents an asynchronous behavior, like a conventional induction motor, while the superconductor motor presents both synchronous and asynchronous behaviors.

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“…The aims for this configuration are based on previous works [13], [14] done with a smaller superconducting disk that was moved by the rotating magnetic field of a permanent magnet.…”

Section: Motor Configuration and Working Parametersmentioning

confidence: 99%

Working Magnetic Field Around the Rotating YBCO Disk of a Low-Power 2-Phase Bipolar Motor Entirely Based on Bulks

Álvarez

Suarez²,

Pérez

et al. 2009

IEEE Trans. Appl. Supercond.

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Abstract-The design of a bipolar single-turn coil made of a YBCO bulk was proposed by the group of Electrical Application of Superconductors, at the University of Extremadura, to be an element for the design of a modular low-power two-phase axial-flux motor. The magnetic field is created by several of these elements strategically located in an arrangement that makes the field rotate in the space where a disk-shaped rotor made of YBCO is going to work. Part of the rotor pulling mechanism is due to the trapped magnetic field in the rotating disk and another part is due to the variation of the magnetic field on the surface of the disk, and how the magnetic field is screened by the disk. In this work we study the magnetic field in the space where the rotor works, before and after its placement, and measure the trapped magnetic field in the disk. We present the magnetic field maps obtained on planes located in both sides of the disk, and propose a distribution of the magnetic field lines that justify the measurements and show the screening effect of the disk.

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Disk-shaped superconducting rotor for an axial flux induction motor

Cited by 12 publications

References 3 publications

Bipolar electrical coil based on YBCO bulks: initial tests

Bipolar electrical coil based on YBCO bulks: initial tests

Disc Motor: Conventional and Superconductor Simulated Results Analysis

Working Magnetic Field Around the Rotating YBCO Disk of a Low-Power 2-Phase Bipolar Motor Entirely Based on Bulks

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