摘要:
Status of a bypass source of parallel-connected UPSs is determined from a load share when a loading of the parallel-connected UPSs meets a predetermined criterion. Status of a bypass source of the parallel-connected UPSs is determined from a bypass source voltage when the loading of the parallel-connected UPSs fails to meet the predetermined criterion. The loading may include an aggregate loading, and failure of a bypass source of a UPS may be identified responsive to detecting that a load share of the UPS is less than a predetermined proportion of the aggregate loading. Alternatively, failure of the bypass source may be identified by detecting that a bypass voltage fails to meet a predetermined criterion. Bypass circuits of the UPSs may be controlled responsive to a load share and/or a bypass source voltage.
摘要:
Paralleled uninterruptible power supplies (UPSs) including respective pulse-width modulation (PWM) power converter circuits coupled in common to an AC load bus have PWM cycles that are synchronized. In particular, sampling of control inputs of the PWM power converter circuits may be synchronized, such that, for example, sampling of control inputs to the PWM power converter circuits occurs at substantially the same time for each of the PWM power converter circuits. A common phase reference corresponding to an AC voltage phase for the AC load bus may be provided, and the PWM cycles of each of the power converter circuits may synchronized, e.g., phase locked, to the common phase reference. More particularly, the respective PWM cycles of the UPSs may be phase locked to phase locked sinusoidal reference signals generated at each of the UPSs. Sampling for other control functions may also be synchronized to the PWM cycles.
摘要:
Status of a bypass source of parallel-connected UPSs is determined from a load share when a loading of the parallel-connected UPSs meets a predetermined criterion. Status of a bypass source of the parallel-connected UPSs is determined from a bypass source voltage when the loading of the parallel-connected UPSs fails to meet the predetermined criterion. The loading may include an aggregate loading, and failure of a bypass source of a UPS may be identified responsive to detecting that a load share of the UPS is less than a predetermined proportion of the aggregate loading. Alternatively, failure of the bypass source may be identified by detecting that a bypass voltage fails to meet a predetermined criterion. Bypass circuits of the UPSs may be controlled responsive to a load share and/or a bypass source voltage.
摘要:
A power supply apparatus, such as an on-line UPS, includes an AC/DC converter circuit having an input configured to be coupled to an AC source, a DC/AC converter circuit having an input coupled to an output of the AC/DC converter circuit by a DC link, and a bypass circuit operative to couple and decouple the output of the DC/AC converter circuit to and from the input of the AC/DC converter circuit. Power is transferred from the output of DC/AC converter circuit via the bypass circuit to conduct a test of the apparatus, such as a factory or field load test. For example, power may be circulated around a loop including the AC/DC converter circuit, the DC/AC converter circuit and the bypass circuit to conduct the test in order to test these components under load. A status of such components may be determined responsive to the test. In further embodiments, such components may be calibrated responsive to the test.
摘要:
The present disclosure includes J-Gate adaptor assemblies for motorcycle clutch levers and related systems and methods. In one illustrative embodiment, a bracket on a side of a motorcycle serves as fulcrum for a lever rod mounted thereon via a heim joint. A lower end of the rod is attached to a clutch control cable. The rod extends upwardly, through a guide member with a guide channel formed as elongated slot extending in a first direction to a bend portion that extends in another direction to a “rest portion.” The rod may be levered in one direction in the guide channel to engage the clutch and in the opposite direction to disengage it. The rod may be held in the “rest” portion of the channel to retain the clutch in a disengaged position. Conversion kits and methods of converting and adapting motorcycles for using these types of assemblies are also included.
摘要:
A method and system for controlling the spin rate of an optical device. A device driver provides notification that media has been inserted into the optical device. A control service determines the format of information on the media. The spin rate of the optical device is locked or unlocked based on the format.
摘要:
Systems and methods for reducing the size of a power supply in a computing device by monitoring activities to maintain the load on the power supply below a predetermined threshold. Through a set of software drivers, various components are placed into low power states in order to reduce the load on the power supply. The methods allow manufacturers to utilize smaller power supplies that are better fitted for the actual operating conditions of the computing device, rather than a large power supply designed for worst case conditions.
摘要:
The present invention provides an inspection system having a scanner system coupled to an operator console. The scanner system is preferably an x-ray based system that has an x-ray source to emit, for example, dual energy x-rays, a detector or an array of detectors that detect the emitted x-rays, and a conveyor system. The conveyor system has a conveyor belt that moves the article to be inspected through the emitted x-rays. The operator console includes a display device, an operator input device and a controller. The operator console is configured to provide information and control capabilities to an operator all within the same viewing field or arc. The operator console is configured to permit customization by individual operators and/or customization for a specific location where the inspection system is deployed (e.g., an airport or office building) without changing components. These features, as well as others, minimize operator fatigue, increase operator inspection speed and increase the efficiency of the inspection process. Further, this universal operator console configuration, enables the console to be interchangeable to various types of scanner systems produced by the assignee of the present invention as well as other manufacturers.
摘要:
Various embodiments of the present invention provide a functionalized carbon matrix, compositions and composites including the same, and methods of making and using the same. In various embodiments, the present invention provides a functionalized carbon matrix having the structure CM-(NZ-L-FG)n. At each occurrence, Z is independently selected from H and a bond to CM. The variable CM is a substituted or unsubstituted carbon matrix. At each occurrence, linker L is independently substituted or unsubstituted. At each occurrence, variable FG is independently selected from a functional group. The degree of substitution n is about 1 to about 1,000,000.
摘要:
A method and system to incentify a user to participate in a survey providing accurate, reliable and complete answers with tools to a researcher to create a research project and research games. The research game is published online where users play the research game. The system measures in-game answers, selections, behaviors and outcomes. The system analyzes these in-game responses and reports the game behaviors and outcomes to the research client. Information regarding the research project, research game, the research client, the user, responses and reports are stored in one or more databases.