END-TYPE INDUCTOR STEPPING MOTOR FOR STATIONARY TIME INSTRUMENTS Russian patent published in 1995 - IPC

FIELD: electrical engineering. SUBSTANCE: stepping electric motor has two identical magnetoconductive discs 2 and 6 with poles 9 and 10 in the form of ring sectors positioned concentrically. One of discs 2 is placed immobile and carries magnet 3 and ring winding 4 coaxial to each other, the other disc 6 is mounted for rotation relative to first disc 2 coaxial to it. Discs are mounted with 180 deg turn of face planes with respect to each other and have equal areas. Concentric poles 9 and 10 of discs are placed with displacement of axes of 1/4 of pole pitch with reference to each other over circumference. Horizontal axis of one of semi-ring poles 10 close to one of discs is located within limits 0-π/6/6 relative to direction of forces of earth gravity. Horizontal axes of semi-ring poles of different discs are turned over circumference within limits π/12 - π/6 with reference to each other. EFFECT: simplified control circuit with simultaneous increase of stability and precision of angle turn. 4 dwg