作者: Paul Belokin , Martin P. Belokin
DOI:
关键词: Electric motor 、 Field coil 、 Permanent magnet synchronous generator 、 Rotor (electric) 、 Acoustics 、 Stator 、 Electromagnetic coil 、 Engineering 、 Rotation 、 Magnet 、 Control theory
摘要: A display unit for point of sale advertising comprises a stationary object, such as real or simulated flowering plant, mounted on support, flowerpot, and flying butterfly, operated by driving apparatus so to move in randomly undulating reversible orbit around the would butterfly. The an electric motor having housing stationarily stator including field coil electrically energizable alternating current housing, rotor form bipolar permanent magnet rotatably upright magnetizable metal shaft housing. further thin resiliently flexible length piano wire its lower end mechanically connected rotatable butterfly upper end. In operation, energization produces magnetic which causes rotor, rotate one direction. However, predetermined mechanical load imposed effected random striking against horizontal vertical excursions orbital path, "hand-up" shaft, periodically frequently reverse direction rotation. resultant effect is cause flutter about plant