| LIEBERT CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20120119745 | BATTERY MONITOR WITH CORRECTION FOR INTERNAL OHMIC MEASUREMENTS OF BATTERY CELLS IN PARALLEL CONNECTED BATTERY STRINGS - 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. Immediately after releasing the load, the battery monitor measures the voltage across the battery cell (recovered voltage) and determines the battery cell internal resistance by dividing the difference between the recovered voltage and the loaded voltage by the intercell current. | 05-17-2012 |
| 20120119580 | Method and Apparatus for Maintaining Uninterruptible Power Supplies - 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. | 05-17-2012 |
| 20120078550 | System And Method For Displaying Battery String Cell Data In Polar Coordinate Graphical Form - 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. | 03-29-2012 |
| 20120057377 | UNINTERRUPTIBLE POWER SUPPLY WITH A DUAL GAIN VOLTAGE REGULATOR CONTROLLING AN INVERTER OUTPUT VOLTAGE BASED ON ACTIVE AND REACTIVE COMPONENTS OF CURRENT - 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. | 03-08-2012 |
| 20110286252 | T-TYPE THREE-LEVEL INVERTER CIRCUIT - This invention relates to a T-type three-level inverter circuit. The circuit includes an absorption unit. In the absorption unit, a first terminal of the first resistor is connected to a positive bus terminal, and a second terminal of the first resistor is connected to a first terminal of the first capacitor and a negative electrode of the first diode; a second terminal of the first capacitor and an positive electrode of the first diode are respectively connected to an emitter and a collector of the first controllable switch tube; a first terminal of the second resistor is connected to a negative bus terminal, and a second terminal of the second resistor is connected to a positive electrode of a third diode; a negative electrode of the third diode is connected to both a first terminal of the second capacitor and a positive electrode of a second diode; and a second terminal of the second capacitor and a negative electrode of the second diode are respectively connected to a collector and a emitter of the second controllable switch tube. As the T-type three-level inverter circuit according to the invention is implemented, a voltage stress on the bidirectional switch tube is effectively reduced due to strong absorption capacity of the absorption unit, and thus the bidirectional switch tube can adopt a tube having a relatively low breakdown voltage value. Moreover, the absorption unit has a low cost and a small loss. | 11-24-2011 |
| 20110279124 | FLOAT CURRENT MONITOR - A battery monitor device is provided for determining float current in a battery system. The battery monitor device is comprised of: a voltage sense circuit electrically coupled to opposing sides of a connector coupling two battery cells and operable to measure a voltage drop across the connector; a test load circuit that operates to apply a load across the least one battery cell and connector and measure current flow through the connector; and a controller configured to receive voltage drop measures from the voltage sense circuit and current measures from the test load circuit. The controller operates to determine a resistance of the connector and computes a float current flowing through the connector from the resistance and voltage drop measures taken only when a load is not being applied across the connector. | 11-17-2011 |
| 20110278953 | CONTROL METHOD FOR SOFT SWITCH CIRCUIT IN SWITCH POWER SOURCE - The present invention discloses a control method for a soft switch circuit in a switch power source, which generates an alternating primary power filter current by controlling first and second primary power switching devices to be closed and opened, and generates an intermittent alternating resonant current in the same direction as the primary power filter current in a resonant branch by controlling forward and backward auxiliary switching devices to be closed and opened to thereby achieve closing of the first and second primary power switching devices at a zero voltage, and which generates a balance current with the same magnitude as and in the opposite direction to the resonant current in the resonant branch in at least a period of time during the resting of the resonant current by further controlling the forward and backward auxiliary switching devices to be closed and opened to thereby achieve an average current of zero across the resonant branch in a switching cycle. Without any additional balance circuit, this control method can address the imbalance problem of output power of the positive and negative direct current input voltage sources in a soft switch circuit of an existing switch power source. | 11-17-2011 |
| 20110272125 | Cooling Fluid Flow Regulation Distribution System and Method - The disclosure provides systems and methods for regulating and distributing cooling fluid through a plurality of heat sinks, such as cold plates, using a flow regulator, which sets the total flow rate, in combination with one or more individual orifices that allow further flow distribution as required by individual cold plates, despite flow variations upstream of the orifices. An orifice can be coupled to an orifice holder, which includes a body to support the orifice, and which may be coupled (directly or indirectly) to an inlet of the cold plate. Alternative manners of coupling orifices in the fluid flow besides an orifice holder can be employed. Generally, the flow regulator(s) is coupled with a plurality of orifices and conduits through which the cooling fluid flows. Related system components can be assembled as a module for installation into a cooling system that includes other system components such as a pump, compressor or other pressure sources for the cooling fluid. | 11-10-2011 |
| 20110244715 | Adaptive Power Strip - 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 distribute power from the power source to the power rail. The receptacle modules distribute power from the power rail tot 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. The communications module maintains an inventory in memory of the receptacle modules on the power rail that includes information about the characteristics of the receptacle modules. In an aspect, receptacle modules determine their locations on the power rail and send information to the communications module that the communications module uses to determine the location of the receptacle modules on the power rail. In an aspect, the power entry module determines the type of power service provided to it at its power inlet. | 10-06-2011 |
| 20110241430 | METHOD FOR CONTROLLING SYSTEM GAIN OF UPS - The present invention discloses a control method for the system gain of a UPS, which includes the steps of: S1: detecting a PFC unit so as to determine whether to start an LLC, and if so, then going to step S2; otherwise, going to step S8; S2: starting the LLC; S3: detecting the mains supply so as to determine whether to switch from the mains supply to a battery, and if so, then going to step S4; otherwise, going to step S5; S4: performing a frequency-fixed adjustment on the LLC with an operating frequency larger than a resonating frequency by a preset magnitude while clearing an integral quantity within a first preset time T1; and performing a frequency-fixed adjustment on the LLC with an operating frequency equal to the resonating frequency while clearing the integral quantity between the first preset time T1 and a second preset time T2, and going to step S8; S5: determining whether the LLC-in-series resonant converter has an overload, and if so, then going to step S6; otherwise, going to step S7; S6: performing a frequency-fixed adjustment on the LLC-in-series resonant converter with the operating frequency equal to the resonating frequency while clearing the integral quantity; and going to the step S8; S7: performing a normal PI adjustment on the LLC-in-series resonant converter; and S8: Ending. The operation condition of the PFC is detected in real time, the LLC is started when the PFC becomes abnormal, and the LLC is adjusted in response to a load during operating so that the system gain is maintained in a monotonously step-down region of a ZVS region. | 10-06-2011 |
| 20110237097 | Adaptive Power Strip - 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 distribute power from the power source to the power rail. The receptacle modules distribute power from the power rail tot 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. The communications module maintains an inventory in memory of the receptacle modules on the power rail that includes information about the characteristics of the receptacle modules. In an aspect, receptacle modules determine their locations on the power rail and send information to the communications module that the communications module uses to determine the location of the receptacle modules on the power rail. In an aspect, the power entry module determines the type of power service provided to it at its power inlet. | 09-29-2011 |
| 20110146965 | COOLING SYSTEM WITH INDIRECT HUMIDITY DETERMINATION - A cooling system for a data center in which equipment racks are disposed has a cooling unit and a controller coupled to the cooling unit. The cooling system includes temperature sensors at or near the cooling unit's air return inlet, at or near the cooling unit's air supply outlet, and at or near the equipment racks air inlet(s). The controller measures these temperatures. A relative humidity sensor is located at or near the air return inlet of the cooling unit. The relative humidity where the relative humidity sensor is located is measured by the controller using the relative humidity sensor. The controller calculates the dew point temperature from the temperature sensor and relative humidity. Using this dew point, which is essentially constant throughout the space being conditioned, and the temperatures from the other locations, the controller then calculates the relative humidity at each location. | 06-23-2011 |
| 20110120164 | METHOD AND APPARATUS FOR EQUALIZING A PUMPED REFRIGERANT SYSTEM - A cooling system is provided that comprises: a refrigerant loop having a pump; an evaporator heat exchanger thermally coupled to a heat source, the evaporator plumbed in the loop; a condensing heat exchanger and a receiver plumbed in the loop; and an equalizing conduit plumbed between an inlet to the condenser and the receiver and comprising a flow regulating valve. | 05-26-2011 |
| 20110101785 | METHOD AND APPARATUS FOR MAINTAINING UNINTERRUPTIBLE POWER SUPPLIES - 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. | 05-05-2011 |
| 20110101118 | CONDENSATION PREVENTION SYSTEM AND METHODS OF USE - A method of preventing condensation on equipment inside a temperature-controlled enclosure comprises measuring the temperature in at least one location inside the enclosure. The temperature inside the enclosure is compared with a safe temperature, at which the risk of condensation is reduced. The temperature inside the enclosure is increased until the safe temperature is achieved. A user is then notified that it is safe to access the enclosure. | 05-05-2011 |
| 20110035471 | SELF-CONFIGURING IP ADDRESSABLE DEVICES UTILIZING TWO ETHERNET PROTOCOL IP PORTS - The present invention is related to a method and apparatus for monitoring and controlling devices comprising connecting an external manager to a communication protocol, connecting a first device to the external manager, assigning an IP address to said first device publishing a second IP address from the first device, connecting a second device to said first device such that it obtains the said second IP address, publishing a third IP address from said second device. | 02-10-2011 |
| 20100315152 | CONTROL METHOD FOR SOFT SWITCH CIRCUIT IN SWITCH POWER SUPPLY - The present invention relates to a control method for a soft switch circuit in a switch power supply, which controls first and second main power switch devices to be turned on and turned off constantly to generate an alternating main power filter current, and controls forward and backward auxiliary switch devices to be turned on and turned off to generate an intermittent alternating resonant current across a resonant branch in the same direction as the main power filter current to thereby achieve zero-voltage turn-on of the first and second main power switch devices; and further controls the forward and backward auxiliary switch devices to be turned on and turned off to generate compensation currents across the resonant branch in the opposite direction to the alternating main power filter current in at least a period of time during resting of the resonant current to thereby accomplish a charging and discharging process of resonant capacitors in a dead time. Thus, a freewheeling diode can be turned on normally, so that it is possible to avoid a damage to the devices due to an impact current and a spark voltage resulting at zero crossing of the current in the soft switch circuit. | 12-16-2010 |
| 20100296319 | POWER SOURCE MODULE WITH BROAD INPUT VOLTAGE RANGE - The present invention discloses a power source module with a broad input voltage range, which includes a first and a second power source input terminals, a rectification filter circuit, and a conversion circuit connected between the first and the second power source input terminals and the rectification filter circuit, and the conversion circuit is connected with the first and the second power source input terminals through a rectification circuit and includes a first converter and a second converter, both of which are connected in parallel for output in a low voltage operation mode and in series for output in a high voltage operation mode. The power source module with a broad input voltage range according to the invention can be implemented so that an input voltage to a single converter can be half of a high input voltage, thereby addressing the problem of a limitation upon the voltage of the power device. The connection in parallel at a low voltage can facilitate choosing an alternative transistor with relatively small current. The loss of power devices can be dispersed to facilitate a thermal design. The utilization ratio of an input direct current filter capacitor can be improved greatly in the broad voltage range. The voltage range can be altered with merely simple pre-use configuration. | 11-25-2010 |
| 20100213988 | DRIVING CIRCUIT OF SWITCH DEVICE - The present invention relates to a driving circuit of switch device. The present invention employs transformer isolated driving. The number of said transformers is two. The primary sides of the two transformers are connected to two driving modulators, respectively. The input terminal of a high frequency carrier signal and the input terminal of a driving signal are connected to the input terminal of a first driving modulator. The input terminal of a driving signal being connected with an inverter together with the input terminal of the high frequency carrier signal are connected to the input terminal of a second driving modulator. The first secondary side of the first transformer is connected to a power supply circuit which may provide a necessary voltage for turning on the switch device during a high level period of the driving signal. The first secondary side of a second transformer is connected to a voltage discharging circuit which may discharge a turn-on voltage of the switch device into a low level during a low level period of the driving signal. Therefore, the pair transistor amplification circuit in the existing transformer isolated driving becomes unnecessary, which provides a high driving power. In addition, employing no optical coupler isolated element makes the working life even longer. | 08-26-2010 |
| 20100204838 | ENERGY EFFICIENT AIR CONDITIONING SYSTEM AND METHOD UTILIZING VARIABLE CAPACITY COMPRESSOR AND SENSIBLE HEAT RATIO LOAD MATCHING - An air conditioning system that may incorporate a controller, a variable capacity compressor responsive to the controller, an evaporator in communication with an input of the compressor, and at least one cooling component for generating an airflow over the evaporator to generate a cooling airflow using the evaporator, the cooling component being responsive to the controller. A first input enables a user to provide a user determined dry bulb temperature range for an enclosed environment, and a second input enables the user to provide a user determined moisture content range for the enclosed environment. The controller controls at least one of the compressor and the cooling component to vary a sensible heat ratio (SHR), in order to maintain a dry bulb temperature and the moisture content within the enclosed environment in accordance with the user defined ranges. | 08-12-2010 |
| 20100138586 | ADAPTIVE AND MODULAR UPS SYSTEM AND METHOD - An uninterruptible power supply (UPS) system that may incorporate a battery subsystem including at least one battery for generating electrical power, and a UPS subsystem including at least one power module. At least one first bus system may couple the battery subsystem to the UPS subsystem to supply electrical power to the UPS subsystem. An input and output (I/O) subsystem is in communication with an output of the UPS subsystem for generating an output signal. At least one second bus system may be used for coupling the output of the UPS subsystem to the I/O subsystem. At least one of the first and second bus systems may include a pair of parallel coupled, independent busses, and may further have a tie bar for enabling the pair of busses to be reconfigured as a single bus. | 06-03-2010 |
| 20100125371 | SYSTEM AND METHOD FOR FORMING UNIVERSAL CONTROL PANEL - 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. | 05-20-2010 |
| 20100110621 | RACK WITH VERTICAL MOUNTING PROVIDING ROOM FOR RACK PDU - An electronic component equipment rack utilizes vertically extending adjustable rails to support electronic components therein. The vertically extending rails are configured to allow a power distribution unit to be attached thereto. The dimensions of the vertically extending rails allow the power distribution unit to be disposed between the attached vertically extending rail and an associated adjacent opposed side of the rack. The vertically extending rails can be Z-shaped with front and rear flanges and a side panel extending therebetween. The power distribution unit can be attached to the rear flange and be adjacent the rear flange and the side panel. The power distribution unit can be flush with the front flange. The rack and the opening between opposing vertically extending rails can conform to the EIA3 10-D standard. | 05-06-2010 |
| 20100109545 | Automatic Compensation For Degradation Of Optocoupler Light Emitting Diode - A system and method for compensating for degradation of a light emitting diode includes accumulating time that the light emitting has been lit. An additional amount of drive current to be provided to the light emitting diode is determined based on the accumulated time that the light emitting diode has been lit. The system includes a controller that accumulates the time that the light emitting diode has been lit and determines the amount of addition drive current to be provided to the light emitting diode. | 05-06-2010 |
| 20100085708 | HIGH-EFFICIENCY, FLUID-COOLED UPS CONVERTER - An interruptible power supply (UPS) may include direct cooling for various components of the UPS that generate heat. The direct cooling may be part of a cooling system that directs the generated heat to the ambient environment external to the room or building housing the UPS such that the heat load of the UPS places a minimal or zero load on the air-conditioning system for the room within which the UPS is located. The cooling system can utilize multiple cooling loops to transfer the heat from the heat-generating components of the UPS to the ambient environment. | 04-08-2010 |
| 20100082173 | MAXIMIZED BATTERY RUN-TIME IN A PARALLEL UPS SYSTEM - 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. | 04-01-2010 |
| 20100067269 | INTELLIGENT SENSORLESS CONTROL OF A PHASE CONTROLLED RECTIFIER - An uninterruptible power supply (“UPS”) has a phase-controlled rectifier coupled to a source of AC power and having an output providing a DC bus, the output of the phase-controlled rectifier coupled to an inverter. A first controller generates a firing angle for the rectifier and a fuzzy logic controller generates a firing angle for the rectifier. In an aspect, the rectifier is controlled by the firing angle generated by the first controller during normal operating conditions of the UPS and the rectifier is controlled by the firing angle generated by the fuzzy logic controller during abnormal operating conditions of the UPS. The abnormal operating conditions can include loss of a direct DC bus voltage measurement and or a period of time after the UPS experiences a large load change. In an aspect, the firing angle generated by the first controller is compared to the firing angle generated by the fuzzy logic controller and a rectifier fault condition determined to exist when the two firing angles differ by at least a threshold amount. In an aspect, the first controller is a PI controller. | 03-18-2010 |
| 20100042344 | SYSTEM AND METHOD FOR DETECTING AN ELECTRICAL SHORT ACROSS A STATIC SWITCH OF AN UNINTERRUPTIBLE POWER SUPPLY - A monitoring system for detecting a short circuit condition in a switching subsystem of a bypass input of a power supply. The system may comprise a voltage monitoring subsystem for monitoring a voltage across at least one component of the switching subsystem and generating a first output signal in accordance therewith. A processor, responsive to the first output signal from the voltage monitoring subsystem, may be used to compare the first output signal with a predetermined threshold signal and to generate a second output signal based on the comparison. The processor may also be used to consider a state of a circuit breaker in communication with the switching subsystem and to use the state of the circuit breaker and the second output signal to determine whether at least one of a short circuit condition and an open circuit condition exists with respect to the switching subsystem. | 02-18-2010 |
| 20090256422 | AC AND DC UNINTERRUPTIBLE ONLINE POWER SUPPLIES - 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. | 10-15-2009 |
| 20090251853 | HEAT-SINK BRACE FOR FAULT-FORCE SUPPORT - A support system for an electrical device arranges the plurality of heat-sink assemblies in an orientation that allows the forces associated with an electrical fault that are transferred to the support structure to be reduced. The arrangement allows the electrical fault forces to cancel one another out such that the resulting net force applied to the support structure is significantly reduced. The size, strength and/or robustness of the support system can be reduced as the forces transmitted thereto are greatly reduced. The heat-sink assemblies can be arranged to facilitate ease of maintenance by allowing the heat-sink assemblies to be removed from a front access panel of the electrical device. | 10-08-2009 |
| 20090251094 | HYSTERESIS MITIGATION AND CONTROL METHOD - 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. | 10-08-2009 |
| 20090251005 | UNDERVOLTAGE TRANSFER DETECTION - A method of increasing the reliability of an uninterruptible power supply (UPS) providing AC power to a load, comprising determining the magnitude and duration of an actual undervoltage event in a power output of the UPS; providing a predetermined undervoltage standard establishing at least a range of undervoltage events of acceptable magnitude and duration for the load; comparing the magnitude and duration of the actual undervoltage event with the predetermined standard; and causing the load to be transferred to an alternate source of AC power when the comparison of the actual undervoltage event with the predetermined standard reveals that the actual undervoltage event is not acceptable. | 10-08-2009 |
| 20090236909 | Adaptive Power Strip - 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 distribute power from the power source to the power rail. The receptacle modules distribute power from the power rail tot 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. The communications module maintains an inventory in memory of the receptacle modules on the power rail that includes information about the characteristics of the receptacle modules. In an aspect, receptacle modules determine their locations on the power rail and send information to the communications module that the communications module uses to determine the location of the receptacle modules on the power rail. In an aspect, the power entry module determines the type of power service provided to it at its power inlet. | 09-24-2009 |
| 20090230772 | SYSTEM AND METHOD FOR LOAD SHARING IN MULTI-MODULE POWER SUPPLY SYSTEMS - A load sharing, multi-module power supply system for supplying power to a load. The system may involve: a first power supply module having a controller, and having a first per unit capacity (pu-c); a second power supply module having a controller, and having a second per unit capacity (pu-c); the controller of the first power supply module adapted to implement a reduction in an output power of the first power supply module upon the detection of an operating event, where a portion of the load being handled by the first power supply module is shed by a percentage, and such that the first power supply module remains operating during the operating event but at a reduced power output level; and upon the occurrence of the operating event the controller of the second power supply module is adapted to increase a power output of the second power supply module sufficient to accommodate the portion of the load that has been shed by the first power supply module. | 09-17-2009 |
| 20090217527 | HEAT EXCHANGER CORE TUBE FOR INCREASED CORE THICKNESS - A heat exchanger core tube having a body with at least one internal fluid passage and having at least one end adapted such that an effective height results that is less than or equal to the inside diameter of a manifold and can allow the body of the core tube to have a height greater than the inside diameter of the manifold. The at least one adapted end may comprise an adapter and may be twisted such that the longitudinal axis of a core tube remains substantially normal to the longitudinal axis of the manifold and wherein the end of the core tube is angled less than 90 degrees with respect to the tube body. | 09-03-2009 |
| 20090213627 | POWER SUPPLY SYSTEM WITH ADAPTIVE BLOWN FUSE DETECTION USING NEGATIVE SEQUENCE COMPONENT - Existing measurements of an input component (such as voltage or current) in a three phase power supply system are decomposed into a negative sequence component. The negative sequence component, which is significantly higher when a rectifier fuse is blown, is compared to a threshold and a determination made that a rectifier fuse is blown when the negative component exceeds the threshold. In an aspect, an adaptive algorithm is used to make the detection work better in the range of the nominal frequency of the input voltage. In an aspect, the negative sequence is determined indirectly from the existing measurements. | 08-27-2009 |
| 20090212631 | SUBSTATION BASED HIGH VOLTAGE UNINTERRUPTIBLE POWER SUPPLY - A power supply includes an isolation transformer. The isolation transformer includes a primary winding and N secondary windings, where N is an integer. The primary winding receives a first alternating current voltage. Each of the N secondary windings generates a second alternating current voltage. M rectifiers convert the second alternating current voltages to a direct current voltage, where M is an integer. X inverters convert the direct current voltage to a third alternating current voltage, where X is an integer. A reference transformer is electrically coupled between the X inverters and output terminals of the power supply, is connected in parallel with the output terminals, and is configured to provide at least one of a neutral reference and a ground reference. | 08-27-2009 |
| 20090211743 | LAMINATED SHEET MANIFOLD FOR MICROCHANNEL HEAT EXCHANGER - A heat exchanger can have a manifold which includes a plurality of laminated sheets that allow a customization of the heat exchanger. The design can allow for a more optimal flow of coolant to areas of high load, thereby making the temperature distribution across the heat exchanger more uniform, or intentionally non-uniform. Furthermore, the laminated sheets can allow multiple circuits to be employed in the heat exchanger such that different coolants can be utilized therein and maintained separate from one another. The tubes can be microchannel tubes. A single set of manifolds can be used with multiple heat exchanger cores to provide a more compact heat exchanger. Mounting features can be integral with a group of the sheets. | 08-27-2009 |
| 20090210096 | CLIMATE CONTROL SYSTEM FOR DATA CENTERS - A data center has equipment racks in which electronic equipment is disposed and a climate control system that includes a computer room air conditioner (CRAC) and an air economizer. The climate control system includes a control module that controls the climate control system. The control module determines whether outside air is suitable for use in cooling the data center based on the dry bulb temperature and humidity of the outside air. If the outside air is not suitable for, only the CRAC is used to cool the data center. If the outside air is suitable for use, outside air and not the CRAC is used to cool the data center when the dry bulb temperature of the outside air is below a minimum outside air dry bulb temperature set point. The outside air is conditioned before it is introduced as supply air into the data center so that the supply air is above a minimum temperature. If the outside air is suitable for use and the dry bulb temperature of the outside air is above the minimum outside air dry bulb temperature set point, the control module determines a cooling percentage of cooling of the data center to be provided by the CRAC and a cooling percentage to be provided by the outside air, where the percentage can range from zero percent to one-hundred percent. The control module then controls the climate control system so that the CRAC and outside air provide cooling of the data center according to their respective determined cooling percentages. | 08-20-2009 |
| 20090210095 | HUMIDITY CONTROL FOR MULTIPLE UNIT A/C SYSTEM INSTALLATIONS - An air conditioning (A/C) system that may have a plurality of air conditioning units disposed in different zones of an area that each operate to cool the different zones, a humidity sensor for sensing the humidity in the area, and a controller. The controller may be adapted to analyze a sensible heat load being experienced by each of the air conditioning units and to control a latent heat removal being performed by each air conditioning unit such that a percentage of latent heat removal performed by each air conditioning unit does not exceed a percentage of sensible heat removal being performed by each air conditioning unit. | 08-20-2009 |
| 20090200868 | UNINTERRUPTIBLE POWER SUPPLY WITH RECTIFIER FAST WALK IN - In an uninterruptible power supply (“UPS”) having a flywheel storage module, switched rectifying devices of an AC/DC converter of the UPS are walked in after a utility power outage by initially firing the switched rectifying devices at a phase angle where the voltage output by the AC/DC converter to a direct current bus matches a depleted DC bus voltage. In an aspect, the initial phase angle is determined by the equation: | 08-13-2009 |
| 20090161312 | LIQUID COOLING SYSTEMS FOR SERVER APPLICATIONS - 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. | 06-25-2009 |
| 20090129913 | Computer Room Environmental Conditioning Unit with Translatable Blowers - 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. | 05-21-2009 |
| 20090126008 | ADAPTIVE CAPACITY POWER SUPPLY - Methods and systems are disclosed for automatically tracking and controlling the capacity ratings of UPS units. The methods and systems provide a central server or repository for storing the capacity ratings, grant kVA and grant code authorized for each UPS unit along with a unique security key for each unit. When a customer purchases a capacity upgrade, the server updates the capacity rating for the customer's unit and issues an upgrade grant that includes the new rating and the grant code. The upgrade grant may thereafter be downloaded by a service technician and used to upgrade the unit. Alternatively, the upgrade grant may be downloaded directly to the UPS unit, and the unit's software and/or firmware may perform the upgrade automatically. In either case, the upgrade may be performed through a software modification, thus eliminating the need for the technician to physically swap out hardware. Such an arrangement helps ensure that only authorized capacity upgrades are performed. | 05-14-2009 |
| 20090080999 | TOOLLESS MECHANICAL FASTENER - A method of mounting a removable component to a mounting structure, comprising aligning an opening in the removable component with an opening in a mounting structure; aligning a toolless mechanical fastener with at least one of the openings; inserting a portion of the toolless mechanical fastener device through the opening in the removable component and the opening the mounting structure, contacting a head of the toolless mechanical fastener with an outer surface of the removable component; rotating the toolless mechanical fastener in a predetermined direction to a coupling position at some angle relative to its insertion position, contacting portions of the base of the toolless mechanical fastener with an inner surface of the mounting structure, and deforming at least a portion of the base to couple the removable component to the removable component between the head and the base of the mechanical fastener. | 03-26-2009 |
| 20090056348 | MOTORIZED BALL VALVE CONTROL SYSTEM FOR FLUID COOLED HEAT EXCHANGER - A vapor compression cooling system having a control unit adapted to receive working fluid pressure or temperature, environment temperature or relative humidity, compressor digital output, or other cooling system information to control a condenser cooling fluid control valve to minimize flow changes through the valve. | 03-05-2009 |
| 20090031735 | SYSTEM AND METHOD OF CONTROLLING FLUID FLOW THROUGH A FLUID COOLED HEAT EXCHANGER - A vapor compression cooling system having a control unit adapted to receive working fluid pressure or temperature information to control a condenser cooling fluid control valve to minimize flow changes through the valve. | 02-05-2009 |
| 20090014548 | CONDENSATION PREVENTION SYSTEM AND METHODS OF USE - A method of preventing condensation on equipment inside a temperature-controlled enclosure comprises measuring the temperature in at least one location inside the enclosure. The temperature inside the enclosure is compared with a safe temperature, at which the risk of condensation is reduced. The temperature inside the enclosure is increased until the safe temperature is achieved. A user is then notified that it is safe to access the enclosure. | 01-15-2009 |
| 20090013716 | METHOD AND APPARATUS FOR EQUALIZING A PUMPED REFRIGERANT SYSTEM - A cooling system is provided that comprises: a refrigerant loop having a pump; an evaporator heat exchanger thermally coupled to a heat source, the evaporator plumbed in the loop; a condensing heat exchanger and a receiver plumbed in the loop; and an equalizing conduit plumbed between an inlet to the condenser and the receiver and comprising a flow regulating valve. | 01-15-2009 |
| 20090009001 | METHOD AND APPARATUS FOR SYNCHRONIZATION OF ACTIONS IN A PARALLEL UPS SYSTEM USING A SERIAL COMMUNICATIONS BUS - A serial communications bus is utilized to send key action data between parallel UPS units. The communications bus is used to transmit data at the zero crossing of the critical bus voltage. Each UPS unit then takes action based upon the event data received at the next zero crossing of the critical bus voltage. | 01-08-2009 |
| 20080303347 | METHOD AND APPARATUS FOR MAINTAINING UNINTERRUPTIBLE POWER SUPPLIES - 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. | 12-11-2008 |
| 20080298019 | COOLING SYSTEM AND METHOD OF USE - A system of cooling and method of use that includes a connector having a data reader capable of reading a wireless identifier and/or a breaker box capable of routing liquid cooling to at least one server. In a preferred embodiment, both the quick connector and the breaker box are used in conjunction with a liquid coolant such as refrigerant or water. | 12-04-2008 |
| 20080289808 | HEAT EXCHANGER CORE TUBE FOR INCREASED CORE THICKNESS - A heat exchanger core tube having a body with at least one internal fluid passage and having at least one end adapted such that an effective height results that is less than or equal to the inside diameter of a manifold and can allow the body of the core tube to have a height greater than the inside diameter of the manifold. The at least one adapted end may comprise an adapter and may be twisted such that the longitudinal axis of a core tube remains substantially normal to the longitudinal axis of the manifold and wherein the end of the core tube is angled less than 90 degrees with respect to the tube body. | 11-27-2008 |
| 20080278003 | HIGH EFFICIENCY ALTERNATIVE/RENEWABLE POWERED UPS SYSTEM - The disclosure provides an efficient alternative energy uninterruptible power supply (UPS) system having a main first source of power coupled to an electrical load, comprising: a second source of power from stored energy coupled to the electrical load, the second source being adapted to supplement the first source and condition the power from the stored energy to predetermined conditions for the electrical load; an automatic transfer switch (ATS) coupled between the first source and the second source and adapted to control the first source coupling to the electrical load when the first source power is noncompliant with predetermined conditions for the electrical load; and a source of alternative energy coupled downstream of the ATS to the second source, the electrical load, or a combination thereof, wherein the source of alternative energy comprises a source of direct current (DC) power. | 11-13-2008 |
| 20080275705 | Battery Tester with Wireless Voice Status Messages - Methods and systems are disclosed for providing wireless data transfer and voice messages in a voltage measurement device. In some embodiments, the methods and systems dynamically construct voice messages that substantially correspond to text messages displayed on a display of the measurement device. The voice messages may be assembled from words and phrases that have been prerecorded and stored in a voice module of the measurement device. A wireless communication module transmits the voice messages from the voice module to a wireless receiver that may be worn or carried by the operator. The wireless communication module also facilitates wireless transfer of data from the measurement device to a computer. Such an arrangement allows an operator to conduct tests in noisy, cramp, and/or hazardous environments without having to divert his/her eyes to see or strain his/her ears to hear the measurement device. | 11-06-2008 |
| 20080271878 | HEAT EXCHANGER AND METHOD FOR USE IN PRECISION COOLING SYSTEMS - 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. | 11-06-2008 |
| 20080265722 | INTELLIGENT TRACK SYSTEM FOR MOUNTING ELECTRONIC EQUIPMENT - The present invention provides an intelligent track system generally mounted in a network, server, or telecom rack/enclosure rack rail that can sense the spaces, such as “U” spaces, used by electronic equipment, shelving, or blanking panels and provide such information to a remote location. Information technology (IT) managers and other decision-makers can remotely view the actual available spaces and determine appropriate locations for installing additional equipment. Criteria can be based on actual available space and for some embodiments in conjunction with predictive or actual sensed temperatures proximate to the spaces, available cooling capacity, power loads, and available power capacity. In at least one embodiment, the intelligent mounting track system can include a plurality of sensors mounted along the rack surfaces that collectively or individually uniquely identify which spaces are occupied. The information can be communicated to an electronic processor with software to interpret the data and indicate space utilization. | 10-30-2008 |
| 20080265680 | METHOD FOR PULSE WIDTH MODULATION SYNCHRONIZATION IN A PARALLEL UPS SYSTEM - A method for pulse width modulated pulse synchronization in a parallel UPS system uses the locally measured critical bus voltage to detect a zero crossing and adjust the PWM pulse to coincide with the zero crossing. No communication between the units is required to perform synchronization, and no “master” and “slave” relationship exists to thereby increase the total system reliability. | 10-30-2008 |
| 20080265679 | TRANSFER SWITCH SYSTEM WITH NEUTRAL CURRENT MANAGEMENT - An electrical power transfer system for selectively connecting a load to a first power source or a second power source includes a first switch having an input selectively connected to the first power source and an output connected to the load. A second switch includes an input and an output connected to the load. An isolation device has its input connected to the second power source and its output connected to the input of the second switch to provide a continuous neutral path for the second power source and to isolate a neutral current path of the load from the second power source. | 10-30-2008 |
| 20080251240 | INTEGRATED HEAT EXCHANGERS IN A RACK FOR VERTICAL BOARD STYLE COMPUTER SYSTEMS - A system for cooling heat-generating objects, such as computer boards situated in a rack, includes an enclosure in which the heat generating objects are situated. The enclosure has an air inlet and an air outlet, and a fan induces airflow into the air inlet, through the enclosure and out the air outlet. A heat exchanger is situated in the enclosure such that the heat exchanger is in a spaced apart relationship with the heat-generating object. Air moving through or past the heat-generating object is warmed, and the heat exchanger removes the heat before the air exits the enclosure. | 10-16-2008 |
| 20080238404 | METHOD AND APPARATUS FOR MONITORING A LOAD - Applicants have created an improved method and apparatus for remotely monitoring an electrical load and assessing key attributes of power-related anomalies and line disturbances caused or created by the electrical load and qualifying their conformity to certain expected steady state conditions. The apparatus includes an intelligent power distribution module that can include a power output section, a power input section, a communication section, and related circuitry. The intelligent power distribution module can further include a memory section, a sensing device, a processing device, and a switch. The method for monitoring an electrical load having a current and voltage requirement supplied by an electrical source coupled to the load generally includes: interfacing a sensing module between the load and the electrical source; sensing one or more characteristics of the load; and determining the performance of the load sensing. | 10-02-2008 |
| 20080216493 | MICROCHANNEL COOLING CONDENSER FOR PRECISION COOLING APPLICATIONS - The present disclosure provides a method, apparatus, and system for a centralized microchannel cooling system in precision cooling applications, such as mission-critical systems with data centers or cabinets or rooms with medical equipment. The microchannel condenser is designed to provide sufficient cooling for such applications by configuring multiple microchannel slabs together in a fashion that advantageously can increase the overall cooling abilities of multiple slabs not heretofore known. The system can provide a retrofit condenser for some existing precision cooling systems that have limitations on size, while satisfying cooling capacity requirements. The multiple slabs can be cooled by flowing a fluid such as air or a liquid across them. One or more microchannel slabs can be mounted horizontally, vertically, or in an inclined position. Further, the system can allow for multiple passes of refrigerants through the microchannel slabs. | 09-11-2008 |
| 20080196867 | Cooling Fluid Flow Regulation Distribution System and Method - The disclosure provides systems and methods for regulating and distributing cooling fluid through a plurality of heat sinks, such as cold plates, using a flow regulator, which sets the total flow rate, in combination with one or more individual orifices that allow further flow distribution as required by individual cold plates, despite flow variations upstream of the orifices. An orifice can be coupled to an orifice holder, which includes a body to support the orifice, and which may be coupled (directly or indirectly) to an inlet of the cold plate. Alternative manners of coupling orifices in the fluid flow besides an orifice holder can be employed. Generally, the flow regulator(s) is coupled with a plurality of orifices and conduits through which the cooling fluid flows. Related system components can be assembled as a module for installation into a cooling system that includes other system components such as a pump, compressor or other pressure sources for the cooling fluid. | 08-21-2008 |
