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51 条记录 (耗时 0.014 秒)

    A.c. power control unit
    31.
    发明授权
    A.c. power control unit 失效
    电源控制单元

    公开(公告)号：US3806784A

    公开(公告)日：1974-04-23

    申请号：US31221472

    申请日：1972-12-04

    申请人： HOWDEN SUPERTHERM LTD

    发明人： FINDLAY J

    IPC分类号： G05D23/19 ,  G05D23/24 ,  G05F1/45 ,  H02M1/08 ,  H02P27/02 ,  H02P5/40

    CPC分类号： G05F1/452 ,  G05D23/1913 ,  G05D23/24 ,  H02M1/083 ,  H02P27/026

    摘要： A method of controlling and a control unit for a system fed by an a.c. power through semiconductor power switches wherein a square wave is used to control firing pulses for the power switches, the mark-space ratio of the square wave being representative of an actual and a desired system parameter.

    摘要翻译： 一种控制方法和控制单元，用于通过交流电源馈送的系统。 通过半导体功率开关的功率，其中使用方波来控制功率开关的点火脉冲，方波的标记空间比代表实际和期望的系统参数。

    Zero-crossing silicon controlled rectifier control system
    32.
    发明授权
    Zero-crossing silicon controlled rectifier control system 失效
    零交叉硅控制整流器控制系统

    公开(公告)号：US3577177A

    公开(公告)日：1971-05-04

    申请号：US3577177D

    申请日：1969-06-26

    申请人： GEN ELECTRIC

    发明人： HEWLETT CLARENCE WILSON JR

    IPC分类号： G05F1/45 ,  H02M1/08 ,  G05F1/44

    CPC分类号： G05F1/452 ,  H02M1/083

    摘要： A zero-crossing silicon controlled rectifier control system for single-phase, full-wave and three-phase operation. An error signal representing the difference between desired and actual load values in integrated to control a first switch constituted by complementary transistors. A second switch, in series with a pulse generator and the first switch, is conductive during portions of alternate half cycles. Concurrent conduction by both switches energizes the pulse generator which causes a pulse to be generated on the energization. This turns on a first silicon controlled rectifier at the beginning with the positive-going zero crossing. A second silicon controlled rectifier controlled by a trigger circuit conducts during the next half cycle in response to load energization.

    Sinusoidal inductorless dimmer providing an amplitude attenuated output
    37.
    发明授权
    Sinusoidal inductorless dimmer providing an amplitude attenuated output 失效
    正弦电感器调光器提供幅度衰减输出

    公开(公告)号：US5365148A

    公开(公告)日：1994-11-15

    申请号：US978816

    申请日：1992-11-19

    申请人： Paul E. Mallon ,  Gary S. Bateman

    发明人： Paul E. Mallon ,  Gary S. Bateman

    IPC分类号： G05F1/45 ,  H05B39/04 ,  G05F1/00

    CPC分类号： H05B39/048 ,  G05F1/452 ,  Y02B20/148 ,  Y10S315/04

    摘要： A dimmer control circuit for application to a load bank produces a sinusoidal power wave form exhibiting the desirable characteristic of suitable rise and fall times producing little or no audible or radio frequency interference. A pair of MOS-FET power devices operate in a linear mode and attenuate respective half-cycles of a single phase power line as a function of a dimmer control signal applied thereto. The device includes a mechanism for avoiding damage to the power MOS-FET by controlling conditions under which a signal change is applied to the gates of the MOSFETs, and by imbalanced attenuation between the MOS-FETs through the range of the dimmer control signal.

    摘要翻译： 用于应用于负载组的调光控制电路产生正弦功率波形，表现出合适的上升和下降时间的理想特性，产生很少或没有可听或无线电频率干扰。 一对MOS-FET功率器件以线性模式工作并衰减作为施加到其上的调光器控制信号的函数的单相电力线的相应半周期。 该装置包括通过控制向MOSFET的栅极施加信号变化的条件以及通过调光器控制信号的范围通过MOS-FET之间的不平衡衰减来避免损坏功率MOS-FET的机构。

    Proportional firing circuit
    38.
    发明授权
    Proportional firing circuit 失效
    比例点火电路

    公开(公告)号：US4878011A

    公开(公告)日：1989-10-31

    申请号：US226224

    申请日：1988-07-29

    申请人： Roger A. Holtslander

    发明人： Roger A. Holtslander

    IPC分类号： G05D23/19 ,  G05F1/45 ,  H03K17/725

    CPC分类号： H03K17/725 ,  G05D23/1913 ,  G05F1/452

    摘要： A relay control circuit which is capable of reliably controlling the transmission of electrical power in very small time increments. Specifically, the present invention features a proportional firing circuit which will create an SCR firing signal whose pulse timing is proportional to the magnitude of a variable input signal. The control circuit varies the conduction time for the SCRs by varying the time between firing signal pulses of fixed duration.

    摘要翻译： 一种继电器控制电路，其能够以非常小的时间增量可靠地控制电力的传输。 具体地，本发明的特征在于一种比例击发电路，其将产生SCR触发信号，其脉冲定时与可变输入信号的幅度成比例。 控制电路通过改变固定持续时间的触发信号脉冲之间的时间来改变SCR的导通时间。

    Load-responsive treater controller
    39.
    发明授权
    Load-responsive treater controller 失效
    负载敏感处理器控制器

    公开(公告)号：US4286206A

    公开(公告)日：1981-08-25

    申请号：US82442

    申请日：1979-10-09

    申请人： Roger K. Odom

    发明人： Roger K. Odom

    IPC分类号： B01D17/06 ,  G05F1/45 ,  H03K17/64

    CPC分类号： G05F1/452 ,  B01D17/06 ,  H03K17/64 ,  Y10S323/901

    摘要： The essential elements of the electrical system of a treater, or dehydrator, of produced oil well fluids are connected and physically oriented as mounted within the shell of the treater. The electrodes (1 and 2) of the treater are energized from a line supply, or mains, through a transformer (10), to establish an electrostatic field. The transformer introduces an inductive component to the load. A control circuit (40) is arranged to respond to the current demanded by this inductive load and disconnect the load from the line supply, or mains, in a predetermined program designed to protect the components of the system, yet reconnect the load to the supply as frequently as practical.

    摘要翻译： 生产的油井液的处理器或脱水器的电气系统的基本元件被连接并且物理定向为安装在处理器的壳体内。 处理器的电极（1和2）通过变压器（10）从线路供电或电源供电，以建立静电场。 变压器向负载引入电感元件。 控制电路（40）被布置成响应于由该感性负载所要求的电流并且在设计用于保护系统的部件的预定程序中断开负载与线路电源或电源的连接，而将负载重新连接到电源 像实际一样频繁。

    Power control for appliance using multiple high inrush current elements
    40.
    发明授权
    Power control for appliance using multiple high inrush current elements 失效
    使用多个高浪涌电流元件的电器功率控制

    公开(公告)号：US4282422A

    公开(公告)日：1981-08-04

    申请号：US8452

    申请日：1979-02-01

    申请人： Thomas R. Payne ,  Alfred L. Baker

    发明人： Thomas R. Payne ,  Alfred L. Baker

    IPC分类号： G05F1/66 ,  C12P13/06 ,  G05D23/19 ,  G05D23/24 ,  G05F1/10 ,  G05F1/45 ,  H05B3/00 ,  H05B1/02

    CPC分类号： G05D23/1913 ,  G05F1/452 ,  Y10T307/477

    摘要： A power control system is disclosed which controls the power output of one or more resistive heating elements in response to operator selected power level settings. Control of power to the elements is accomplished by generating a multi-bit binary word representing a selected power level, each bit being operative to control the application of power to the element during a different control interval. A control word is generated for each element and is updated once during every associated control period, a period comprising a number of intervals equal to the number of heating elements. The heating elements are of a type which draw a relatively high current during a transient heat-up period. The application of power to other elements is inhibited when one of the elements is having power applied thereto during its transient period. Power control for each element is staggered by testing a bit of different positional value in each word during any given interval.

    摘要翻译： 公开了一种功率控制系统，其响应于操作者选择的功率电平设置来控制一个或多个电阻加热元件的功率输出。 通过产生表示所选功率电平的多位二进制字来实现对元件的功率的控制，每个位可操作以在不同的控制间隔期间控制对元件的功率的施加。 为每个元件生成一个控制字，并且在每个相关的控制周期期间更新一次，该周期包括等于加热元件的数量的间隔数。 加热元件是在瞬时加热期间画出相对高电流的类型。 当其中一个元件在其过渡期间具有施加电力时，功率对其它元件的施加被抑制。 每个元素的功率控制通过在任何给定的间隔内测试每个单词中不同位置值的位来交错。