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An electrical gearbox by means of pole variation for induction and superconducting disc motor

Inácio, S and Inácio, D and Pina, J M and Valtchev, Stanimir and Neves, M V and Rodrigues, A L (2008) An electrical gearbox by means of pole variation for induction and superconducting disc motor. Journal of Physics: Conference Series, 97, 012221. ISSN 742-6588. eISSN 1742-6596. URL: http://dx.doi.org/10.1088/1742-6596/97/1/012221. (ISI Web of Science, Citations: 1).

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Official URL: http://dx.doi.org/10.1088/1742-6596/97/1/012221

Abstract

In this paper, a poly-phase disc motor innovative feeding and control strategy, based on a variable poles approach, and its application to a HTS disc motor, are presented. The stator windings may be electronically commutated to implement a 2, 4, 6 or 8 poles winding, thus changing the motor's torque/speed characteristics. The motor may be a conventional induction motor with a conductive disc rotor, or a new HTS disc motor, with conventional copper windings at its two iron semi-stators, and a HTS disc as a rotor. The conventional induction motor's operation principle is related with the induced electromotive forces in the conductive rotor. Its behaviour, characteristics (namely their torque/speed characteristics for different number of pole pairs) and modelling through Steinmetz and others theories are well known. The operation principle of the motor with HTS rotor, however, is rather different and is related with vortices' dynamics and pinning characteristics; this is a much more complex process than induction, and its modelling is quite complicated. In this paper, the operation was simulated through finite-elements commercial software, whereas superconductivity was simulated by the E-J power law. The Electromechanical performances of both motors where computed and are presented and compared. Considerations about the systems overall efficiency, including cryogenics, are also discussed.

Item Type:Article
Divisions:Departamento de Engenharia Electrotécnica > Electrotecnia e Máquinas Eléctricas
Centre of Technology and Systems 2007-2010 > CTS0710-B Industrial/Manufacturing Systems and Energy Efficiency > CTS0710-B1 Energy
ID Code:1764
Deposited By:Elsa Abrantes
Deposited On:23 Oct 2009 00:04
Last Modified:25 Mar 2011 13:55

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