STEPPING ELECTRIC MOTOR Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: stepping electric motor is intended for discrete electric drives. It includes magnetic core 2 made of U-shaped rods 3 with pole pieces 4 on their ends on which ring magnet 5 borders. Locating arm 6 coaxial to it provides for specified starting position of toothed rotor 10 with de-energized coils 7. Edges of teeth of pole pieces 4 on opposite ends of rods 3 are displaced with reference to planes passing through axis of rotor 10 one of which is parallel to axes of rods 3 and the other one is perpendicular to them by 1/4 tooth pitch of rotor over circumference of working gap. Thanks to complex simultaneous action of two coils rotor stops and remains in fixed position even after termination of current pulse. EFFECT: enhanced precision of operation of stepping motor. 14 dwg, 1 tbl