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    Generator for producing a width-modulated square voltage
    11.
    发明授权
    Generator for producing a width-modulated square voltage 失效
    用于生产宽度调制方波电压的发电机

    公开(公告)号：US3604995A

    公开(公告)日：1971-09-14

    申请号：US3604995D

    申请日：1968-08-27

    Applicant: DANFOSS AS

    Inventor： JENSEN ARNE ,  PETERSEN TOM KASTRUP

    IPC: H02P27/06 ,  H02P27/08 ,  H03K7/08 ,  H02P5/16

    CPC classification number: H02P27/08 ,  H02P27/047 ,  H03K7/08

    Abstract: Apparatus producing a width modulated square wave for use in a motor control circuit controlling the speed of an alternatingcurrent motor. A low frequency three-phase generator with stationary components develops three wave outputs integrated and summed with a high frequency wave signal, in a summation circuit, produced by a frequency generator. The sign of the outputs of the summation circuit is ascertained by zero level detectors and employed for controlling the motor speed. A direct-current control voltage is applied to the apparatus to control the amplitude of the high and low frequency waves.

    Converter for measured quantities
    14.
    发明授权
    Converter for measured quantities 失效
    转换器用于测量数量

    公开(公告)号：US3893192A

    公开(公告)日：1975-07-01

    申请号：US45059274

    申请日：1974-03-13

    Applicant: DANFOSS AS

    Inventor： JENSEN ARNE

    IPC: G01R27/02 ,  G08C19/04

    CPC classification number: G01R27/02 ,  G08C19/04

    Abstract: The invention relates to a converter for measured quantities comprising at least one measuring resistance provided in a compensating bridge, the signal current for restoring the bridge balance being fed through a part of the fixed resistances of the bridge. The output that is required for operation is derived from the supervising current. The bridge is connected in series with a control element which varies the voltage across the bridge in such a way that the sum of the currents flowing through the entire bridge is substantially constant, the voltage drop at one of the fixed bridge resistances being used to form a control signal for influencing the control element. In a preferred form of the invention the bridge comprises first and second branches connected to a feed point with each branch consisting of a fixed resistance serving to form the control signal. A third branch comprises a fixed resistance with a tap for connecting the current path for the signal current and the first branch comprises at least one measuring resistance. This results in a very simply constructed bridge which, in the extreme case, makes do with four bridge elements which are two fixed resistances, a fixed resistance with a tap and a measuring resistance.

    Abstract translation: 本发明涉及一种用于测量量的转换器，包括在补偿桥中提供的至少一个测量电阻，用于恢复桥接平衡的信号电流被馈送通过桥的一部分固定电阻。 操作所需的输出来自监控电流。 该桥与控制元件串联连接，该控制元件以跨过整个电桥的电流之和基本上恒定的方式改变电桥两端的电压，其中一个固定电桥电阻下的电压降用于形成 用于影响控制元件的控制信号。 在本发明的优选形式中，桥包括连接到馈电点的第一和第二分支，每个分支由用于形成控制信号的固定电阻组成。 第三分支包括具有用于连接用于信号电流的电流通路的抽头的固定电阻，并且第一分支包括至少一个测量电阻。 这导致非常简单地构造的桥，在极端情况下，使用两个固定电阻的四个桥接元件，具有抽头的固定电阻和测量电阻。

    Speed and voltage control means for an alternating-current motor, particularly a polyphase induction motor
    15.
    发明授权
    Speed and voltage control means for an alternating-current motor, particularly a polyphase induction motor 失效
    交流电动机特别是多相感应电动机的转速和电压控制装置

    公开(公告)号：US3670224A

    公开(公告)日：1972-06-13

    申请号：US3670224D

    申请日：1971-02-18

    Applicant: DANFOSS AS

    Inventor： JENSEN ARNE

    IPC: H02P27/08 ,  H02P5/40

    CPC classification number: H02P27/08 ,  H02P27/047

    Abstract: The invention relates to a speed and voltage control system for an alternating current motor such as a polyphase induction motor. The system includes voltage and frequency regulators and an inverter. In order to avoid the damaging effects of reverse currents and excessive voltages due to hyper-synchronous speed operation upon reducing motor speed, the direct current voltage is made the independent variable with the control frequency being dependent on the actual direct current voltage at the inverter.

    Abstract translation: 本发明涉及一种用于诸如多相感应电动机的交流电动机的速度和电压控制系统。 该系统包括电压和频率调节器和逆变器。 为了避免电动机速度降低引起的超同步速度运行引起的反向电流和过电压的损害，直流电压成为独立变量，控制频率取决于变频器的实际直流电压。

    Inverted converter having common quenching means for all controllable rectifiers
    16.
    发明授权
    Inverted converter having common quenching means for all controllable rectifiers 失效
    具有所有可控整流器的通用测量装置的反相转换器

    公开(公告)号：US3559034A

    公开(公告)日：1971-01-26

    申请号：US3559034D

    申请日：1969-02-14

    Applicant: DANFOSS AS

    Inventor： JENSEN ARNE ,  PETERSEN TOM KASTRUP

    IPC: H02M7/515 ,  H02M7/52

    CPC classification number: H02M7/5152

    Abstract: THE INVENTION RELATES TO AN INVERTED CONVERTER OF THE TYPE HAVING AT LEAST TWO BRANCHES WITH EACH BRANCH CONTAINING TWO CONTROLLABLE RECTIFIERS ARRANGED IN SERIES. EACH CONTROLLABLE RECTIFIER HAS A FREE RUNNING DIODE ASSOCIATED THEREWITH AN EACH BRANCH IS CONNECTED TO A D.C. VOLTAGE SUPPLY THROUGH A SHORT CIRCUIT IMPEDANCE. THE CONVERTER HAS COMMON QUENCHING CONTROL MEANS IN PARALLEL WITH THE BRANCHES. THE QUENCHING CONTROL MEANS INCLUDES A CONDENSER WHICH IS DISCHARGEABLE THROUGH A CONTROLLABLE QUENCHING RECTIFIER AND A CHOKE.

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