Control circuit for a stepping motor in battery-operated instruments
    12.
    发明授权
    Control circuit for a stepping motor in battery-operated instruments 失效
    电池供电仪器中步进电机的控制电路

    公开(公告)号:US4381481A

    公开(公告)日:1983-04-26

    申请号:US204783

    申请日:1980-11-06

    CPC分类号: H02P8/16 G04C3/143

    摘要: In a circuit for the actuation of a stepping motor for battery-operated instruments, in particular watches, the length of motor drive pulses is altered for the purpose of saving energy. In the process, different loads on the stepping motor and variable battery voltages are taken into consideration. This feature is accomplished by measuring a signal proportional to the current flowing through the field coil of the stepping motor and interrupting the drive pulse to the motor when a predetermined change occurs in the signal. The drive pulses are further limited as to both minimum and maximum length. Advantageously, the stepping motor is actuated and the signal processed by means of a digital circuit technology, in order to provide for complete integration of the circuit.

    摘要翻译: 在用于驱动用于电池供电的仪器,特别是手表的步进电机的电路中,改变电动机驱动脉冲的长度以节省能量。 在此过程中,考虑到步进电机和可变电池电压的不同负载。 该特征通过测量与流过步进电动机的励磁线圈的电流成比例的信号,并且当信号中发生预定的变化时中断到电动机的驱动脉冲。 驱动脉冲进一步受限于最小和最大长度。 有利地,步进电机被致动并且通过数字电路技术处理信号,以便提供电路的完全集成。