| 摘要 |
PURPOSE:To provide a step motor for oscillation alarm being employed in an electronic appliance. CONSTITUTION:In an electronic appliance provided with an oscillation alarm where the oscillation of a step motor, generated by driving a step motor having a rotor equipped with an eccentric weight, is transmitted through the case body to an arm, the step motor has two pole flat stator and the driving pulse for the step motor comprises a starting pulse, constituted of a phase matching pulse C and a starting pulse E, and a driving pulse H following thereto. The step motor is driven at high speed by the driving pulse H synchronized with the zero-cross time of counter electromotive force induced in a counter electromotive force detection coil 306. |
