Abstract: A structure and methodology of fabrication for a cost effective multipole motor adapted to high volume manufacture. The apparatus includes a low cost housing within which a stator assembly comprised of interchangeable stator electromagnets is installed. A rotor assembly including a plurality of sense magnets and motor magnets integrated onto a rotor shaft is also used. A cover assembly is attached to complete the device. The cover assembly includes a lead frame interconnection assembly and a magnetic sensor adapted to detect the passing of sense magnets to determine the position of the rotor shaft.

Abstract: A structure and methodology of fabrication for a cost effective multipole motor adapted to high volume manufacture. The apparatus includes a low cost housing within which a stator assembly comprised of interchangeable stator electromagnets is installed. A rotor assembly including a plurality of sense magnets and motor magnets integrated onto a rotor shaft is also used. A cover assembly is attached to complete the device. The cover assembly includes a lead frame interconnection assembly and a magnetic sensor adapted to detect the passing of sense magnets to determine the position of the rotor shaft.

Abstract: A rotary position sensor featuring a robust and simply constructed magnetic field assembly which provides a uniform magnetic field in the working air gap for a conventional mangetosensitive device located thereinside. The magnetic field assembly includes a plastic casing having a blind hollow, magnet pocket located at the blind end of the hollow, and a pair of diametrically opposed pole piece pockets oriented in upstanding relation to the magnet pocket. A permanent magnet is snapped into the magnet pocket, and a pole piece is respectively snapped into each of the pole piece pockets. The pole pieces may be rectangular or arc shaped, wherein the space therebetween forms the working air gap into which the magentosensitive device is placed. The magnetic field established in the working air gap is transverse to the axis of the blind hollow, and is generally uniform.

Abstract: A rotary position sensor featuring a robust and simply constructed magnetic field assembly which provides a uniform magnetic field in the working air gap for a conventional magnetosensitive device located thereinside. The magnetic field assembly includes a plastic casing having a blind hollow, magnet pocket located at the blind end of the hollow, and a pair of diametrically opposed pole piece pockets oriented in upstanding relation to the magnet pocket. A permanent magnet is snapped into the magnet pocket, and a pole piece is respectively snapped into each of the pole piece pockets. The pole pieces may be rectangular or arc shaped, wherein the space therebetween forms the working air gap into which the magnetosensitive device is placed. The magnetic field established in the working air gap is transverse to the axis of the blind hollow, and is generally uniform.