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    • 7. 发明公开
    • Control circuit for a DC motor
    • Steuerschaltungfüreinen Gleichstrommotor。
    • EP0495601A2
    • 1992-07-22
    • EP92300257.0
    • 1992-01-10
    • KABUSHIKI KAISHA RIKEN
    • Yaguchi, Osamu, c/o Kabushiki Kaisha RikenArakawa, Mitsunori, c/o Kabushiki Kaisha Riken
    • H02P5/168H02P5/172H02H7/093H02H7/09E05F15/16E05F15/00
    • H02H7/0851E05F15/41E05F15/695E05Y2900/55H02P7/285H02P7/288H02P7/2885
    • A DC power supply (V C c) for a DC motor (2) is controlled by a drive transistor (3). An "ON" state of the drive transistor (3) is maintained by a comparator (8) or means which compares a terminal voltage (V T ) at a point (4) between the DC motor (2) and the drive transistor (3) with a reference voltage (V R ) supplied from the power supply. A clock pulse is applied to the drive transistor (3) to make it periodically turn off in order to detect an induced voltage depending upon rotation rate of the DC motor (2). The drive transistor (3) remains turned off upon stopping the rotating DC motor (2) by force. A regulator (20) is provided between the power supply and the reference voltage. A restraint torque and a rotation rate control means are also provided. In an alternative embodiment descbribed, a pulsating power supply is provided instead of the DC power supply and the clock. One particular application for the control circuit disclosed is as the drive means for an automobile powered window.
    • 用于DC电动机(2)的DC电源(VCc)由驱动晶体管(3)控制。 驱动晶体管(3)的“导通”状态由比较器(8)或比较直流电动机(2)和驱动晶体管(3)之间的点(4)处的端子电压(VT)的装置来维持, 具有从电源供应的参考电压(VR)。 时钟脉冲施加到驱动晶体管(3)以使其周期性地关闭,以便根据DC电动机(2)的转速来检测感应电压。 驱动晶体管(3)通过强制停止旋转的直流电动机(2)时保持关闭。 在电源和参考电压之间提供调节器(20)。 还提供了约束扭矩和转速控制装置。 在描述的替代实施例中,提供脉动电源代替DC电源和时钟。 所公开的控制电路的一个具体应用是汽车动力窗的驱动装置。