Abstract: An improved cylindrical linear motor is capable of being more easily assembled by changing the constructions of a primary iron core and a primary coil and significantly preventing an over-heating of the primary coil. The motor includes primary toothed sections formed of stacked steel plates, with the primary toothed sections being spaced-apart from one another, a supporting member formed to support the primary toothed sections, coils wound onto the supporting member and between the primary toothed sections, a yoke formed of stacked steel plates and engaged to the primary toothed sections between which the coils are wound, and a secondary iron core inserted within the primary iron cores.

Abstract: A differential motor/generator apparatus comprising a stator region, a first rotating member and a second rotating member. The stator region includes at least one stator component and an opening. The stator member includes at least one pair of torroid regions each having at least one winding positioned thereon in parallel. The first rotating member is associated with the stator region and is positionable within the opening of the stator region. The second rotor member is rotatably associated with the stator region and includes a cavity. A portion of the stator region and the first rotor member are positionable within the cavity of the second rotating member. This enables the first and the second rotating members to rotate about a common axis of rotation.

Abstract: A flat vibration generating apparatus wherein a flat coreless eccentric vibrator armature generates an eccentric vibration desired from the aspect of body feel. An air-core armature coil group thereof consists of m pieces (where m is an integer of 3 or more) of armature coils disposed in superposition with one another in m phases in an arrangement such that they are eccentric and with their phases deviated in a circumferential direction, and that they do not describe a complete disc-like shape as viewed from the axial direction.

Abstract: An upper coil bar and lower coil bar are disposed in slots of an armature core. The upper coil bars have upper coil-end sections which extend radially from the outer periphery of the armature core and together from a commutator surface with which a brush member is in contact. The upper coil-end sections and coil-end sections of the lower coil bars are retained by a fixing cap fixed between a shaft of the rotary electric machine and the upper coil-end sections, and also by a spacer disposed between the upper coil-end sections and the lower coil-end sections so that the commutator surface can be maintained smooth even under conditions of thermal expansion or high-speed operation.

Abstract: A variable reluctance electric motor includes a stator having a plurality of radially inwardly extending poles which are divided into a plurality of longitudinal sections. The cross sectional shapes of the first stator pole sections are different from the cross sectional shapes of the second stator pole sections. A rotor is supported within the stator for relative rotational movement and includes a plurality of radially outwardly extending poles which are divided into a plurality of longitudinal sections. The cross sectional shapes of the first rotor pole sections are different from the cross sectional shapes of the second rotor pole sections. The first rotor poles are longitudinally aligned with the first stator poles so as to interact therewith when electrical current is supplied to windings provided on the stator poles.

Abstract: A support for the rotor shaft of a centrifugal pump with permanent-magnet electric motor. The motor is of the type which comprises a laminate-pack stator with a coil-like winding and a rotor placed in a cylindrical chamber which is separate from the stator, the rotor being rotatable about the shaft which is fixed axially therein. The support is characterized in that it comprises a tubular shank which extends from the bottom of the chamber and in which one end of the shaft is force-fitted. The bottom has a through hole at the shank.

Abstract: An end frame assembly for an electric motor is described. In one embodiment, the assembly includes an endshield, a bearing, an oil wick, and an oil well cover. The oil well cover has at least one endshield engagement tang for aligning with and being secured within an oil well cover engagement opening in the endshield and at least one bearing alignment finger for assisting in maintaining the bearing oriented with respect to a rotor shaft.