Abstract: A rotationally balanced electric motor with air-core stator coils having a casing; a magnet-equipped and externally geared annular rotor; an output shaft with a longitudinal axis positioned at a center of the rotor; a plurality of circumferentially spaced air-core stator coils connected to the casing and encircling the rotor; an externally geared disc parallel to the rotor and connected to, and concentric with, the output shaft; and a plurality of symmetrically positioned common-shaft gear pairs configured to transmit motion from the rotor to the disc and thereby transmitting power to the output shaft without interfering with any of the plurality of air-core stator coils.

Abstract: An electric motor which comprises: (A) a rotor which comprises: (a.1) a co-centric shaft and disk; and (a.2) a plurality of permanent magnets that are equi-angularly spaced and equi-radially disposed on said disk in a ring-like structure! and, (B) a stator which comprises: (b.1) a plurality of coils having a U-shaped structure in top view and double C-shaped structure in side view, said coils are equi-angularly spaced and equi-radially disposed with respect to said disk of the rotor, each section of said C-shaped structure has a cavity through which said ring-like structure and disk rotationally move; and (b.2) a plurality-of-windings coil within each of said U-shaped coils.

Abstract: A motor apparatus having a rotor that includes one or more permanent magnets disposed in ring-like manner, wherein similar poles of adjacent magnets face one another, and further wherein a gear mechanism (e.g., a toothed ring) is configured to transfer rotation from the rotor to an external gear mechanism. The motor may also include a stator comprising one or more solenoids and a bearing assembly that includes a rotating bearing element integrated with a toothed element for engaging with a gear and axle assembly. The rotating bearing element and integrated toothed gear element may pass through cavities of the main solenoids and provide for minimal cavity size, improving motor efficiencies.

Abstract: A magnetic clutch assembly comprises circumferentially spaced coil units, a rotor, and an electrical control unit to controllably supply energizing current for inducing electromagnetic fields at each coil unit, to initiate rotation of the rotor. The rotor comprises a driving ring receivable within an interior of the coil units, a driven ring concentric to the driving ring and connectable with a mechanical load, pairs of permanent magnets consisting of a driving ring magnet and a driven ring magnet which is magnetically coupled to the driving ring magnet, and circumferentially spaced offset magnets provided with the driven ring whose magnetization direction is angularly offset to the magnetization direction of an adjacent driven ring magnet. Curving magnetic field lines of each offset magnet are superposed with the magnetic field lines of an adjacent driven ring magnet that are curving in a different direction to suppress generation of a parasitic back electromotive force.

Abstract: An apparatus for coupling mechanical power between the rotor of a Brushless DC Motor and an external mechanical load comprises: a) two concentric rings; b) an equal number of magnets connected to the inner ring and to the outer ring; and c) an opposite orientation of the poles of each couple of facing magnets, wherein one magnet is placed on the inner ring, and its facing magnet is placed on the outer ring; wherein the first of said two concentric rings is rotatable around an axis by the application of a force not applied by the second ring, and wherein when said first concentric ring rotates, the second ring rotates as well by the action of magnetic forces.

Abstract: The invention relates to an electric motor, which comprises: (A) a disk-type rotor which comprises: (a) a co-centric shaft and disk; (b) two or more permanent magnets on top or within said disk; and (c) pieces of ferromagnetic material that are disposed between at least two of said permanent magnets; and, (B) a stator which comprises: (d) a diametric coil unit which is disposed along a diameter of the rotor's disk, the coil unit comprises: (d1) a diametric rectangular bobbin having a rectangular cavity, said rectangular cavity having a length slightly larger than the diameter of the rotor; (d2) a coil which is wounded around said diametric bobbin; and (d3) upper and lower holes within said bobbin to contain said shaft, thereby to allow rotation of said rotor within the said rectangular cavity.

Abstract: An apparatus for coupling mechanical power between the rotor of a Brushless DC Motor and an external mechanical load comprises: a) two concentric rings; b) an equal number of magnets connected to the inner ring and to the outer ring; and c) an opposite orientation of the poles of each couple of facing magnets, wherein one magnet is placed on the inner ring, and its facing magnet is placed on the outer ring; wherein the first of said two concentric rings is rotatable around an axis by the application of a force not applied by the second ring, and wherein when said first concentric ring rotates, the second ring rotates as well by the action of magnetic forces.