Increased Efficiency of a Step Motor for Driving the Hands of a Wristwatch

摘要

A large increase in the efficiency of a step motor for driving the hands of a wristwatch is reported. Two main methods are used: strengthening the magnetic combination of a rotor magnet and a one-piece stator by narrowing the gap between them, and adjusting the detent torque by introducing a new structure that reduces the thickness of the rotor hole part of the stator, which generates the detent torque.