A primary coil assembly for a superconducting linear induction motor is provided which is arranged opposite to a secondary conductor for exerting a relative thrust on the secondary conductor when energized. The primary coil assembly comprises a plurality of coil units, each including a nonmagnetic and nonconductive bobbin, an alternating-current superconducting wire wound around the bobbin, and nonmagnetic and nonconductive spacers interposed between adjacent turns of the superconducting wire being adjacent to each other in an outward direction with respect to the axis of the bobbin or adjacent to each other in the width direction of the bobbin, for providing a clearance therebetween. The coil units have substantially identical structure and shape and are spaced at a predetermined distance from each other.
A contactless electrical generator assembly containing a stator and a rotor located within the stator is disclosed. The stator is formed by at least one section of superconductive material and at least one electromagnetic coil. The interior surfaces of the stator preferably define a symmetrical shape. The rotor contains at least one magnetic section, and at least two nonmagnetic sections.
A linear motor mechanism includes a stator element and a movable element being movable relative to the stator element in a predetermined direction through an electromagnetic drive force, wherein the stator element includes a yoke and coils disposed along a predetermined direction while the movable element includes a magnet with plural magnetic poles but with no yoke. Plural stator elements are disposed opposed to each other with a magnet of the movable element disposed therebetween.
Regular windings for use in an armature in an electric motor. Windings, each having approximately the same shape as a regular winding, may be overlapped to increase a conductor density within a volume encompassing portions of the windings by having a portion of each winding at least partially fill an aperture of an adjacent overlapping winding. The windings are associated with phases used to operate an electric motor. The windings and armature should be particularly useful in linear electric motors and in steppers used in semiconductor manufacture. Windings of the same shape improve manufacturability of the armature and electric motor. High conductor densities in the windings significantly improve efficiency of the electric motor.
