2D Simulation of Quasidiamagnetic Superconducting Motor

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Dr. Vajda István
Department of Electric Power Engineering

The discovery and spreading of high temperature superconductors offer new opportunities

to design electric rotating machines. With their help man can generate frictionless bearings

or even so far unimaginable sized magnetic induction. In common electric machines the

magnetic field exerts attractive force to create rotatory motion. Nevertheless placing HTS

in the rotor, it can be possible that a repulsive force creates the rotatory movement. In

this way we apply the superconductor not as a conductor but as a diamagnet. This new

motor called QDM. In the first part of my thesis I survey the theoretic background and

main characteristics of the superconducors. Furthermore I review the usage of FEMM the

finite element software that I used for simulations. In the second part of my thesis I analyse

reluctance motors based on attractive force. My primary goal is to maximize the torque. I

compare traditional machines with such designs which utilize the diamagnetic property of

superconductors to increase the ratio between direct and quadrature axis inductances. In

the third part of my thesis I improve the torque of the QDM with some novel methods.


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