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    WAKE-UP CIRCUIT IN AN ELECTRIC STEERING SYSTEM
    1.
    发明公开
    WAKE-UP CIRCUIT IN AN ELECTRIC STEERING SYSTEM 审中-公开
    AUFWECKSCHALTUNG在EINEM ELEKTRISCHEN SERVOLENKSYSTEM

    公开(公告)号：EP2998197A1

    公开(公告)日：2016-03-23

    申请号：EP15180435.8

    申请日：2015-08-10

    申请人： Steering Solutions IP Holding Corporation

    发明人： Amin, Ishtiaque ,  Bright, Philip G. ,  Fisher, Paul M.

    IPC分类号： B62D5/04 ,  B62D15/02

    CPC分类号： B62D15/0235 ,  B62D5/0481

    摘要： In one aspect, a wake-up circuit is provided for triggering a determination of an absolute rotational position of a rotatable shaft of a motor in an electric power steering system of a vehicle. The wake-up circuit includes a plurality of inputs coupled to separate phases of the motor. A voltage boosting circuit is operable to increase a back electromotive force (EMF) voltage induced on one or more of the inputs by rotation of the rotatable shaft of the motor and produce at least one voltage-boosted back EMF voltage. A comparator circuit is operable to compare the at least one voltage-boosted back EMF voltage to a reference voltage and trigger a monitoring system to perform the determination of the absolute rotational position of the rotatable shaft of the motor in the electric power steering system based on a result of the compare during an ignition off state of the vehicle.

    摘要翻译： 在一个方面，提供一种唤醒电路，用于触发确定车辆的电动助力转向系统中的电动机的可转动轴的绝对转动位置。 唤醒电路包括耦合到马达的分离相的多个输入。 升压电路可操作以通过电机的可旋转轴的旋转来增加在一个或多个输入端上感应的反电动势（EMF）电压，并产生至少一个升压的反电动势电压。 比较器电路可操作以将所述至少一个升压电压的反电动势电压与参考电压进行比较，并且触发监视系统以基于电动助力转向系统来执行电动机转子的旋转轴的绝对转动位置的确定 是在车辆的点火关闭状态期间的比较的结果。