Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A containment system includes a control unit comprising a cooling system and a control panel in communication with the cooling system. The containment system also includes a containment unit in communication with the control unit for containing a plurality of electronic components. The containment unit includes a base including a damper, a plurality of sidewalls extending upwardly from the base, and a top overlying the base and having a passageway formed area. The base, the plurality of sidewalls and the top define a containment area there between for containing the plurality of electronic components. Cold air is passed from the cooling system to the base of the containment unit through the damper and into the containment area. Warm air is removed from the containment area through the passageway formed in the top thereof and back to the cooling system.

Abstract: 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.

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 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A method for assembling a plurality of tubes to a tubesheet. A first end of each of the tubes is situated over a corresponding support rod that extends from a pattern block of the fixture. A first end of a plurality of locating members is inserted into a second end of each of the tubes such that a second end of the locating member extends from the tube second end. The tubesheet is then slid over the locating members and tubes such that each of a plurality of holes in the tubesheet receive corresponding ones of the tubes.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The disclosure provides an improved cooling system and associated cabinet for electronic equipment, and optionally, a backup ventilation system for cooling related failures. Generally, the disclosure includes a high capacity closed loop refrigeration system in a modified cabinet, while accommodating standard sized computer equipment. Further, the system provides directed heat removal by altering typical airflow paths within the cabinet. The backup ventilation system is powered by auxiliary power in the case of power failure and uses the same fan(s) for ventilation as is used for cooling. The disclosure provides a more efficient, higher capacity cooling cabinet in less space than otherwise known in the art. Further, the cooling system can anticipate heat loads and therefore operate in a predictive capacity by monitoring input power to the electronic equipment and adjusting the cooling for the expected increase or decrease in heat load generated based on the input power.

Abstract: 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.

Abstract: 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.

Abstract: 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.

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.