Abstract
This paper represents a spider coil winding system of contact-less power transfer for transmitting electric power required for rotor levitation. This proposed system substitutes permanent magnets by rare earth with rotation control. In the previous studies, the problem encountered with limitations of dimensions while winding a coil around stator or rotor. This proposed spider coil winding method offers better solution by increasing number of turns 70% greater than that of flat spiral coil when the diameter of winding material is same. On the other hand, the proposed method with increased number of coil turns helps to transmit more electric power. In case of spider coil winding system, the rotor levitation force was found 7 times higher than conventional coil winding system. This new system also helps to stabilize the levitation of rotor by providing required magnetic force. The validity of this proposed spider coil winding system was confirmed by performing various experiments and comparing the results with conventional and spiral coil winding system.
