Method and device for controlling a multiphase electronically commutated motor
    31.
    发明授权
    Method and device for controlling a multiphase electronically commutated motor 有权
    用于控制多相电子换向电机的方法和装置

    公开(公告)号:US07285930B2

    公开(公告)日:2007-10-23

    申请号:US11359702

    申请日:2006-02-22

    Abstract: A method is specified for controlling a multiphase motor that is commutated by an inverter-side bridge circuit, in the course of which a particularly precise and technically simple detection of a control-relevant variable of a considered motor phase, in particular of a motor phase current and/or a back EMF voltage and/or a variable derived therefrom, takes place. It is provided here to determine the control-relevant variable with the aid of the current state of a freewheeling diode that is disposed in a phase half bridge, assigned to the respective motor phase, of the bridge circuit, the current state being detected during an on time in which a power switch, connected in parallel with the freewheeling diode, of the phase half bridge exhibits a conducting state, and a power switch connected in series with the freewheeling diode exhibits a blocking state.

    Abstract translation: 指定用于控制由逆变器侧桥式电路换向的多相电动机的方法,在该过程中,特别精确和技术上简单地检测所考虑的电动机相位的控制相关变量,特别是电动机相位 发生电流和/或反EMF电压和/或从其导出的变量。 这里提供了借助于配置在桥式电路的相应电动机相位的相位半桥中的续流二极管的当前状态来确定控制相关变量,在当前状态期间在 与半桥式并联连接的电源开关的相位半桥的导通状态为导通状态,与续流二极管串联连接的功率开关呈现阻塞状态。

    Apparatus for establishing and/or monitoring a predetermined filling level in a container
    33.
    发明授权
    Apparatus for establishing and/or monitoring a predetermined filling level in a container 有权
    用于建立和/或监测容器中的预定填充水平的装置

    公开(公告)号:US06236322B1

    公开(公告)日:2001-05-22

    申请号:US09388299

    申请日:1999-09-01

    CPC classification number: G01F23/2967

    Abstract: An apparatus for establishing and/or monitoring a predetermined filling level in a container is described, which apparatus can be used in a wide range of applications, that is to say in many different media, which apparatus comprises: a housing (1), an oscillating element for projecting into the container, a diaphragm (5), which is fixedly clamped into the housing (1) at its edge and to which the oscillating element is fastened, and an electromechanical transducer for exciting the diaphragm (5) to produce oscillations in dependence on a transmission signal (S) present at the transducer and for receiving and converting oscillations thereof into an electrical reception signal (E), in which a percentage interval between a resonant frequency fr and an antiresonant frequency far divided by the resonant frequency fr exceeds 20% when the oscillating element oscillates in air.

    Abstract translation: 描述了用于建立和/或监视容器中的预定填充水平的装置,哪种装置可以在广泛的应用中使用,也就是说在许多不同的介质中,哪种装置包括:壳体(1), 用于突出到容器中的振动元件,在其边缘处固定地夹紧到壳体(1)中并且振动元件被紧固的隔膜(5)和用于激励隔膜(5)以产生振荡的机电换能器 依赖于存在于换能器处的传输信号(S)并且用于接收和转换其振荡为电接收信号(E),其中谐振频率fr与远谐振频率fr之间的反谐振频率之间的百分比间隔 当振荡元件在空气中振荡时超过20%。

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