Abstract: Mounting systems are provided for bringing a heat exchanger from a server rack into thermal contact with a heat exchanger from an electronics server. An engaging force is applied to the two heat exchangers to create thermal communication there between. A mounting mechanism is configured to isolate the engaging force applied to the two heat exchangers. The mounting mechanism may include an interlocking mechanism that prevents transfer of the applied force to the rest of the electronics server to lessen the possibility of disconnecting the electrical connections between the electronics server and the rack, and/or lessening mechanical stresses transferred to the electronics server and the rack chassis. The mounting mechanism also may be coupled to the electronics server locking mechanism such that the action of locking the electronics server into the rack causes the heat exchangers to engage in thermal contact.

Abstract: The present invention discloses a method for transmitting parallelization signals of uninterruptible power supplies, which firstly performs a serialization process on parallelization signals by a logic processing unit and then performs synchronous transmission of the parallelization signals of respective node units over a bus. The method for serial transmission of parallelization signals of uninterruptible power supplies according to the invention can be implemented with easy wiring and can achieve a strong anti-interference ability, ensure real time signal transmission over a guaranteed transmission distance and identify conveniently the failure of a parallelization line while satisfying fundamental transmission demands.

Abstract: A client connection device for a UPS system includes a frame on which a main input distribution unit, a bypass input distribution unit, a battery distribution unit, and an output distribution unit are provided, in which the main input distribution unit and the bypass input distribution unit are arranged on the frame with being opposite to each other up and down, the output distribution unit and the battery distribution unit are arranged on the frame on different sides of the main input distribution unit and the bypass input distribution unit, and the battery distribution unit is side placed near the main input distribution unit and the bypass input distribution unit. A client connection device for a UPS system is provided which can be of a compact structure, be space saving, and be convenient for space operation.

Abstract: An uninterruptible power supply (UPS) includes a plurality of UPS modules. Each of the UPS modules has a battery that provides power to a protected load in the event of a utility power failure. A plurality of controllers control how much power each of the batteries deliver to the protected load, and a communication bus allows the controllers to exchange information about the battery voltages. One of the controllers calculates the average battery voltage of the plurality of batteries and adjusts the amount of energy provided by an individual battery such that the battery voltage is about equal to the average battery voltage.

Abstract: A portable display module for a power strip. The power strip having a power rail having a power bus and a communications bus. The power entry module and one or more receptacle modules mounted on the power rail. The portable display module includes a plurality of selectable views for displaying information on the display screen that the portable display modules receives from the power entry module and the one or more receptacle modules.

Abstract: A cooling system for transferring heat from a heat load to an environment has a volatile working fluid. The cooling system includes first and second cooling cycles that are thermally connected to the first cooling cycle. The first cooling cycle is not a vapor compression cycle and includes a pump, an air-to-fluid heat exchanger, and a fluid-to-fluid heat exchanger. The second cooling cycle can include a chilled water system for transferring heat from the fluid-to-fluid heat exchanger to the environment. Alternatively, the second cooling cycle can include a vapor compression system for transferring heat from the fluid-to-fluid heat exchanger to the environment.

Abstract: A computer room air conditioner (“CRAC”) has a cabinet having an air inlet through which return air from an area is drawn and an air outlet through which air cooled by the CRAC is exhausted. An air moving unit is disposed in the cabinet as are a plurality of cooling coils, which are in separate cooling circuits. The cooling coils are arranged so that the air passes through the cooling coils in serial fashion, that is, first through an upstream cooling coil and then through a downstream cooling cool. The upstream cooling coil acts as a pre-cooler to the subsequent downstream cooling coil. The CRAC includes a controller that controls the cooling provided by the cooling circuits. The controller controls the cooling provided by the upstream cooling circuit so that when it is being used to provide cooling, it provides only sensible cooling.

Abstract: A system and method of isolating an uninterruptible power supply system is disclosed that comprises bypassing an inverter section of the power supply to couple primary power to a load bus; and, thereafter, isolating the power supply by simultaneously uncoupling the power supply from the load bus and coupling the primary power to the load bus.

Abstract: A universal control panel for controlling operation of a cooling component. The universal control panel may have a variable frequency drive (VFD) that incorporates an input voltage and frequency sensing circuit; and logic, memory and communications circuits. The VFD accepts a plurality of differing input signals, analyzes the input signals and generates an output signal having a desired voltage and frequency to provide real time control over an electrical component operably associated with the cooling component. The VFD controls the cooling component in relation to changes in at least one of sensed pressure and a sensed temperature of a fluid, to dampen response of the electrical component, to thus achieve more efficient use of the cooling component being used to cool the fluid.

Abstract: An adaptive power strip has a power rail. A power entry module and one or more receptacle modules having plug receptacles are mounted on the power rail. The power entry module has a power inlet to which a source of power can be coupled. The power entry module distributes power from the power source to the power rail. The receptacle modules distribute power from the power rail to the respective plug receptacles. In an aspect, the power entry module has a communications module that discovers receptacle modules on the power rail having data communications capability and if a receptacle module does not have a unique identifier assigned to it, assigns a unique identifier to the receptacle module that the receptacle module stores in a memory. The communications modules also retrieves from each receptacle module having data communications capability, information about the characteristics of the receptacle module that the communications module stores in a memory.

Abstract: A power supply includes a rectifier that converts an alternating current input voltage to a first direct current voltage. An inverter that converts the first direct current voltage to an alternating current output voltage. A first set of output terminals that receives the alternating current output voltage. A second set of output terminals that receives the first direct current voltage. A charging circuit that charges a backup power source based on the first direct current voltage. The rectifier receives a second direct current voltage from the backup power source based on the power supply operating in a predetermined condition.

Abstract: A battery monitor determines an internal resistance of a battery cell of a battery having parallel connected battery strings which accounts for errors introduced by the parallel connected battery strings. When determining the internal resistance of a battery cell, the battery monitor determines a baseline intercell resistance of an intercell connecting the negative terminal of the battery cell to the positive terminal of an adjacent battery. The battery monitor then applies a momentary load across the battery cell and immediately prior to releasing the load, measures the voltage across the battery cell (loaded voltage) and the voltage across the intercell. The battery monitor then calculates the current flowing through the intercell (intercell current) by dividing the measured voltage across the intercell by the determined intercell resistance.

Abstract: A system and method of isolating an uninterruptible power supply system is disclosed that comprises bypassing an inverter section of the power supply to couple primary power to a load bus; and, thereafter, isolating the power supply by simultaneously uncoupling the power supply from the load bus and coupling the primary power to the load bus.

Abstract: A conditioning unit can allow the blower to be easily translated from a first operable position in the conditioning unit to a second operable position external to the conditioning unit. The translation of the blower does not require the disconnection of the blower and, accordingly, does not require that the blower be disconnected and reconnected to the control system. Such capability can facilitate the installation of the conditioning unit into a variety of applications and allows the purchaser to customize the blower location based on the desired performance. The ability to customize the installation of the conditioning unit without requiring disconnection and reconnection of the blower can reduce the cost and expense associated with the installation into differing applications.

Abstract: In accordance with an aspect of the present disclosure, battery string cell data obtained by a battery monitor monitoring the battery string is transmitted to a computer by the battery monitor. The computer has a display coupled to it. The computer displays the battery string cell data for each battery string in graphical form in a polar coordinate graphical image with data for a plurality of battery strings being displayed simultaneously, each in its own polar coordinate graphical image.

Abstract: An uninterruptible power supply (UPS) system has an inverter having an output coupled to a primary side of an output transformer. The UPS system has a controller having a dual gain voltage regulator for controlling the output voltage of the inverter of a UPS system that uses active and reactive current components of a load current flowing out an output of the UPS system.

Abstract: An improved precision cooling system for high heat density applications comprises a heat exchanger having more fluid outlet conduits than fluid inlet conduits to optimize the pressure drop across the heat exchanger at a given fluid flow rate. The heat exchanger may be of microchannel or tube fin construction, and the cooling system may utilize single phase or multi-phase pumped or compressed fluids.

Abstract: A system and control method mitigates hysteresis of an adjustable component in the system. A control module can allow small control changes to be effected to the component within limits of the component's and/or the system's normal hysteresis band. The control method can allow finer, more accurate and more aggressive control to be obtained from the component. The system and method can utilize two separate control regimes to control adjustments to the component. The first control regime can control changes larger than a hysteresis band and/or changes in a same direction as the last adjustment that was performed with the first control regime. The first control regime can be a feedback-based adjustment to the component. The second control regime can be utilized to control changes within the hysteresis band. The second control regime can use open-loop based adjustments to the component.

Abstract: This invention relates to a T-type three-level inverter circuit. The circuit includes an absorption unit.

Abstract: In one aspect the present disclosure relates to a system for measuring an internal resistance of a battery. The system may involve: a processor; a load module responsive to the processor for applying a load across the battery; a current sense subsystem for sensing the current flowing to the load module and generating a sensed current signal in accordance therewith; a multiplexer module in communication with the current sense subsystem for detecting voltages with the load coupled across the battery and uncoupled from the battery, and generating voltage signals in accordance therewith; and a filtering and amplification subsystem responsive to the multiplexer module, for filtering and amplifying a level of each of the voltage signals to produce modified voltage signals for use by the processor in determining the battery internal resistance.