Stepping motor for electronic timepiece

Details Stepping motor for electronic timepiece Stepping motor for electronic timepiece

1976-01-07

1978-01-03

Rubinson, Gene Z.

Electricity: motive power systems

Open-loop stepping motor control systems

318138, 310 49R, H02K 3700

Patent

active

040669475

ABSTRACT:
A stepping motor for use in an electronic timepiece in which a rotor is stable on an axis of static equilibrium at an angle from 0.degree. to 30.degree. with respect to a center line of the air gaps between stator pole pieces. The relationship between the stator pole pieces and the rotor is such that the phase difference between driving torque and attraction force applied to the rotor ranges from 60.degree. to 90.degree. by an electrical angle in a normal rotation of the rotor and ranges from 90.degree. to 120.degree. in a reverse rotation of the rotor.

REFERENCES:
patent: 3818690 (1974-06-01), Schwarzschild
patent: 3878414 (1975-04-01), Harakawa

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