Back-up uninterruptible power system
    1.
    发明授权
    Back-up uninterruptible power system 失效
    备用不间断电源系统

    公开(公告)号:US5315533A

    公开(公告)日:1994-05-24

    申请号:US702733

    申请日:1991-05-17

    IPC分类号: G06F1/26 H02J9/06 G06F15/20

    CPC分类号: H02J9/062 Y10T307/625

    摘要: A back-up uninterruptible power system has a power supply path from input terminals connected to AC power system lines to normally supply power to a load. Upon the occurrence of a line fault, a static switch in the power supply path interrupts the connection between the AC power lines and the load and an inverter is turned on to provide power derived from an auxiliary battery through a transformer to the power supply path to supply AC power to the load. By using the static switch, switching from line connection to backup power can be done quickly, within a half cycle, so that substantially no interruption of the output waveform is observed. The inverter can be operated to provide a commutation pulse to the SCRs in the static switch to commutate an SCR which might otherwise continue conducting after the triggering signals to the gates are cut off and before the inverter supplies the AC power to the load. A relay connected between the input terminals and the static switch is controlled to open relay contacts after the static switch has interrupted the current flow to the load, thereby providing positive electrical isolation of the AC power system from the uninterruptible power system while allowing the mechanical relay contacts to switch only during times of no current. Line fault detection is carried out by creating a digital waveform composed of an average of prior cycles of the AC input waveform, converting the stored waveform to an analog signal, and comparing it with the present input signal in phase lock therewith to detect deviation of the input signal from the reference waveform.

    摘要翻译: 备用的不间断电力系统具有从连接到AC电力系统线路的输入端子的电源路径,以正常地向负载供电。 在发生线路故障时,电源路径中的静态开关中断交流电力线与负载之间的连接,并且逆变器接通,以通过变压器提供从辅助电池获得的功率到电源路径 为负载提供交流电源。 通过使用静态开关,可以在半个周期内快速地进行从线路连接切换到备用电源,从而观察到输出波形基本上不会中断。 可以对逆变器进行操作,以向静态开关中的SCR提供换向脉冲,以便在切断对门的触发信号之后以及在逆变器将AC电力提供给负载之前换向可能继续导通的SCR。 连接在输入端子和静态开关之间的继电器被控制以在静态开关中断到电流到负载的电流之后打开继电器触点,从而提供交流电力系统与不间断电力系统的正电隔离,同时允许机械继电器 触点仅在无电流时才切换。 线路故障检测通过产生由AC输入波形的先前周期的平均值组成的数字波形,将存储的波形转换成模拟信号,并将其与当前输入信号进行相位锁定,以检测其中的偏差 来自参考波形的输入信号。

    Beverage quality and communications control for a beverage forming and dispensing system
    2.
    发明授权
    Beverage quality and communications control for a beverage forming and dispensing system 有权
    饮料成型和分配系统的饮料质量和通讯控制

    公开(公告)号:US06807460B2

    公开(公告)日:2004-10-19

    申请号:US10028800

    申请日:2001-12-28

    IPC分类号: G06F1700

    CPC分类号: B67D1/0888 B67D1/06

    摘要: A beverage dispensing system includes a beverage dispenser which forms and dispenses a beverage and a processor for monitoring the beverage dispenser. The beverage dispenser operates under various parameters including a first parameter that is indicative of the quality of the beverage to be dispensed and a second parameter that is indicative as to when routine maintenance is to be scheduled. The processor monitors the various parameters under which the beverage dispenser operates and determines whether the first parameter is outside of a predetermined range. If the first parameter is outside the predetermined range, the processor sends a signal regarding a request for immediate repair service. The second parameter is also monitored and the routine maintenance is scheduled based thereon.

    摘要翻译: 饮料分配系统包括形成和分配饮料的饮料分配器和用于监测饮料分配器的处理器。 饮料分配器在各种参数下操作,包括指示要分配的饮料的质量的第一参数以及指示何时要安排日常维护的第二参数。 处理器监视饮料分配器操作的各种参数,并确定第一参数是否在预定范围之外。 如果第一参数在预定范围之外,则处理器发送关于即时维修服务请求的信号。 还监视第二参数,并基于此进行例行维护。

    Method and apparatus for line power monitoring for uninterruptible power
supplies
    3.
    发明授权
    Method and apparatus for line power monitoring for uninterruptible power supplies 失效
    用于不间断电源的线路电力监测的方法和装置

    公开(公告)号:US5229651A

    公开(公告)日:1993-07-20

    申请号:US404902

    申请日:1989-09-08

    CPC分类号: H02H3/24 H02H3/50 Y10T307/625

    摘要: AC line monitoring is provided for uninterruptible power supplies to detect AC power system line faults by comparing the presently received cycle of the AC power line signal with a reference waveform. The reference waveform is formed of a composite of waveforms from prior cycles which adapts over time to the shape of the AC power line waveform, so that waveforms other than pure sinusoids can be accepted without triggering false fault conditions. The composite reference waveform may be formed of essentially all samples from prior cycles with exponentially decaying weighting. An excessive deviation of the current waveform from the reference waveform results in a fault being detected which causes switching of the uninterrupible power supply to provide backup power. The RMS value of the power line voltage is also estimated on a substantially real time basis, preferably by calculating the RMS value of the reference waveform, to provide a fault condition signal when the estimated RMS value falls below a selected level, which also can be utilized to cause switching of the uninterruptible power supply.

    Inverter and battery testing for uninterruptible power systems
    4.
    发明授权
    Inverter and battery testing for uninterruptible power systems 失效
    用于不间断电源系统的逆变器和电池测试

    公开(公告)号:US5182518A

    公开(公告)日:1993-01-26

    申请号:US685068

    申请日:1991-04-11

    IPC分类号: G01R31/40 H02J9/06

    摘要: The inverter of an uninterruptible power system is tested by turning on switches in the inverter at a selected test phase in each half-cycle of the AC input waveform so that the inverter provides a voltage which opposes the AC input voltage waveform during part of each half-cycle of the waveform. The resulting current drawn from the inverter battery, if any, is measured and its peak may be found. The peak battery current during each half-cycle is compared to maximum allowable peak currents to determine if an inverter failure has occurred. If the peak currents are lower than a maximum acceptable value, the test is repeated on a subsequent AC input waveform at a decreased test phase (a shorter time delay from the zero crossing of each half-cycle of the waveform) until the peak current in the first half-cycle is at a selected value, at which time the peak in the second half-cycle is checked to determine if it is within an acceptable range. If not, an inverter test failure is indicated. Inverter test failure is also indicated if repeated cycles during which the test phase is reduced fail to cause the first peak to reach the proper value and the test phase is finally reduced to a minimum allowable test phase. If the inverter has been tested and is found to be operating properly, a battery test can be conducted by selectively disconnecting the AC power system from the load, turning on the inverter for a selected period of time, and detrmining remaining available run time based on the battery voltage while the inverter was running.

    摘要翻译: 不间断电源系统的逆变器通过在交流输入波形的每个半周期内以选定的测试阶段打开变频器的开关进行测试,从而使变频器在每半部分期间提供与交流输入电压波形相对的电压 循环的波形。 测量从逆变器电池中抽出的电流(如果有的话),并且可以找到其峰值。 将每个半周期期间的峰值电池电流与最大允许峰值电流进行比较,以确定是否发生了变频器故障。 如果峰值电流低于最大可接受值,则在随后的AC输入波形上,在减小的测试阶段(从波形的每个半周期的过零点开始的较短的时间延迟)直到峰值电流 第一半周期处于选定值,此时检查第二半周期中的峰值以确定其是否在可接受的范围内。 如果没有,则指示变频器测试失败。 如果测试阶段降低的重复循环不能使第一个峰值达到适当的值,并且最后将测试阶段降低到最小允许的测试阶段,则也会指示变频器测试故障。 如果变频器已经过测试,发现运行正常,可以通过选择性地断开交流电源系统与负载的连接,在一段时间内打开变频器,并根据以下情况确定剩余的可用运行时间,进行电池测试 变频器运行时的电池电压。

    Method and means for programming the operation of an apparatus
    5.
    发明授权
    Method and means for programming the operation of an apparatus 失效
    用于对装置的操作进行编程的方法和装置

    公开(公告)号:US4372054A

    公开(公告)日:1983-02-08

    申请号:US230736

    申请日:1981-02-02

    IPC分类号: D06F39/00 G05B19/10 F26B21/06

    摘要: A method and means for programming the operation of an apparatus having at least a plurality of different control functions provides a control panel, an arrangement for causing the control panel to appear blank prior to initial activation of the apparatus, circuitry for initially activating the apparatus, and circuitry responsive to initial activation for indicating and allowing selection of the different control functions, the circuitry for indicating and allowing selection including circuitry for sequentially displaying the control functions on the control panel to allow selection thereof.

    摘要翻译: 用于编程具有至少多个不同控制功能的设备的操作的方法和装置提供了一种控制面板,用于在初始启动设备之前使控制面板变为空白的布置,用于初始激活设备的电路, 以及响应于初始激活以指示和允许选择不同控制功能的电路,用于指示和允许选择的电路包括用于在控制面板上依次显示控制功能以允许其选择的电路。

    Means and method for producing an optical illusion
    7.
    发明授权
    Means and method for producing an optical illusion 失效
    用于产生视觉幻觉的方法和方法

    公开(公告)号:US5057827A

    公开(公告)日:1991-10-15

    申请号:US258853

    申请日:1988-10-17

    IPC分类号: G09F9/33 G09G3/00

    CPC分类号: G09G3/005 G09F9/33

    摘要: As a rotary member is rotated, light images are produced in a radial direction from the rotary member. The light images are produced in time or position division multiplexed fashion so that, although at any given instant, only a portion of an entire image is actually generated, due to the light persistence of an observer's eye, the observer will observe an entire image about the rotary member.

    摘要翻译: 当旋转构件旋转时,从旋转构件沿径向方向产生光图像。 光图像以时间或位置分割多路复用的方式产生,使得尽管在任何给定的时刻,由于观察者眼睛的光持续性,实际上仅产生整个图像的一部分,观察者将观察关于 旋转构件。