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Your search keyword '"Nicolsky, R."' showing total 101 results
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101 results on '"Nicolsky, R."'

4. Performance of Nd-Fe-B and ferrite magnets in superconducting linear bearings with bulk YBCO

Author

Andrade, R. de, Jr., Cardoso, J.A.A.S., Santos, G.C. dos, Cicco, L.B. de, Fernandes, A.F.G., Rosario, M.A.P. do, Neves, M.A., Souza, A.P. de, Ripper, A., Costa, G.C. da, Nicolsky, R., and Stephan, R.M.

Subjects
Magnetic bearings -- Research, Superconductive devices -- Research, Superconductors -- Research, Business, Electronics, Electronics and electrical industries
Abstract

The performance of Nd-Fe-B and ferrite magnets in superconducting linear bearings with bulk YBCO is investigated and reported.

Published
2003

5. Superconducting axial bearing for induction machines with active radial magnetic bearings

Author

Nicolsky, R., Gorelov, Y., Pereira, A.S., David, D.F.B., Santisteban, A., Stephan, R.M., Ripper, A., de Andrade, R., Jr., Gawalek, W., Habisreuther, T., and Strasser, T.

Subjects
Magnetic suspension -- Research, Superconducting magnets -- Design and construction, Superconductors -- Magnetic properties, Yttrium barium copper oxides -- Usage, Business, Electronics, Electronics and electrical industries
Abstract

The development of a superconducting passive axial bearing intended for an induction machine with vertical rotor and two active radial magnetic bearing is presented. The design of the prototype, which results into a fully levitating system, is based on the system reported by Salazar-Stephan as a 4-pole 2-phase induction machine. The device, which uses windings of a standard motor, performs the levitation with the aid of two NdFeB permanent magnets and bulk pieces of seeded-melt-textured YBaCuO.

Published
1999

6. Simulation of the conversion gain and reflectivity coefficients in heterodyne detector using a superconductor-normal metal-superconductor junction

Author

Luiz, A.M., Gorelov, Y.A., and Nicolsky, R.

Subjects
Reflectance -- Research, Superconductors -- Research, Business, Electronics, Electronics and electrical industries
Abstract

A millimeter-wave heterodyne receiver using a Superconductor-Normal Metal-Superconductor (SNS) junction was designed. Its Current-Voltage Characteristics (CVC) were simulated as a function of its relevant physical parameters. The negative derivative range of its CVC to measure the conversion gain and reflectivity coefficients of the proposed device. Results indicate that it should be possible to increase the sensitivity of the SNS mixer.

Published
1999

40. Effect of induced shielding current transmission in longitudinal direction on levitation force of melt grown single-domain YBa2Cu3O7− x cylindrical superconductor.

Author

Yang, Wanmin, Zhou, Lian, Feng, Yong, Zhang, Pingxiang, Nicolsky, R., and Andrade, R.

Abstract

A novel layer deletion method is used to experimentally investigate the effect of induced shielding current transmission (ISCT) in the longitudinal direction on the levitation force of a single-domain YBa2Cu3O7−x (YBCO) cylindrical superconductor (ϕ30×7 mm). In the experiment the sample was gradually sliced into two equal sheets, at the middle height along a diameter with 5 mm every step. The experimental results show that the levitation force is closely related with the ISCT in the longitudinal direction. Any layer deletion, even a small piece of layer deletion can reduce the levitation force of the sample. After the whole layer was deleted the levitation force can diminish about 50%. It is also found that the levitation force is directly proportional to the effective factor of surface area, which is equal to the top surface area divided by the total surface area parallel to the top surface of the sample. [ABSTRACT FROM AUTHOR]

Published
2004
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