Variable mode feedback control system
    211.
    发明授权
    Variable mode feedback control system 失效
    可变模式反馈控制系统

    公开(公告)号:US3665500A

    公开(公告)日:1972-05-23

    申请号:US3665500D

    申请日:1970-04-01

    申请人: SLI IND

    IPC分类号: G05D3/14 G05B11/18

    摘要: Apparatus selectively and automatically operable in either a linear or a pulse-width modulation mode. A controlled feedback loop in a basically linear system is automatically closed in response to threshold conditions of particular parameters of a moving inductance type load, the loop providing positive feedback in a range of frequencies determined by the phase shift characteristics of the load and additional phase shift circuits. The positive feedback results in a controlled oscillatory condition producing a pulse-width modulation mode for the system.

    摘要翻译: 设备以线性或脉冲宽度调制方式选择性地和自动地操作。 响应于运动电感型负载的特定参数的阈值条件,基本线性系统中的受控反馈回路自动关闭,该回路在由负载的相移特性和附加相移确定的频率范围内提供正反馈 电路。 正反馈导致产生用于该系统的脉冲宽度调制模式的受控振荡条件。

    Step switch
    212.
    发明授权
    Step switch 失效
    步骤开关

    公开(公告)号:US3646365A

    公开(公告)日:1972-02-29

    申请号:US3646365D

    申请日:1970-04-17

    申请人: DANFOSS AS

    摘要: The invention relates to a step switch assembly which switches power on and off in a stepwise manner in dependence upon the upper and lower limiting values of a control signal. The switch assembly may be used for operating in a stepwise manner a bank of units such as motors wherein each motor, or group of motors, represents a portion or part of the total available capacity of a system such as air conditioning system. The step switch assembly includes a reversible counter, a transmitter for sending digital impulses to the counter, and power stages which are switchable on and off in dependence upon information stored at the counter output points.

    摘要翻译: 本发明涉及一种根据控制信号的上限值和下限值逐步切换电源的步进开关组件。 开关组件可以用于以逐步方式操作诸如电动机的一组单元,其中每个电动机或一组电动机代表诸如空调系统的系统的总可用容量的一部分或部分。 步进开关组件包括可逆计数器,用于向计数器发送数字脉冲的发射器以及根据存储在计数器输出点处的信息可开启和关闭的功率级。