SINGLE-PHASE STEPPING ELECTRIC MOTOR DRIVE FOR INSTRUMENTS OF FINE MECHANICS Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: single-phase stepping electric motor drive has stator with ring control winding composed of coils I₁ and I_2, put on magnetic core. Active rotors in the form of ring magnets 5, 6 are put on parallel shafts and engage bearing wheel made in the form of multipole inductor 11. Outer and inner surfaces of ring magnetic core have teeth which number is equal to 2n, where n is gear ratio between satellite gear and carrier 12 of planetary reduction gear. Under action of torque caused by current in control winding, attraction of multipole inductor 11 and influence of cuts-out in magnetic core rotor turns through angle π. With change of polarity of current rotor completes new turn through angle equal to p. Together with it carrier 12 and multipole magnet-wheel 13 used as wheel of additional output shaft move. EFFECT: improved precision. 4 dwg