Abstract: A conditioning system of the free cooling type for environments and particularly for computing centers, which comprises: a conditioning unit of the free cooling type provided with an evaporative cooler using water, first fans, for the exit to the outside environment of a stream of warm air in output from said conditioning unit, second fans for emitting cool, conditioned air from said conditioning unit, elements for accumulating reserve water which are interconnected to the conditioning unit, a detector for detecting the presence of a flow of water in input to the accumulation elements, which are interconnected with an electronic unit for the control and management of the conditioning system.

Abstract: A conditioning unit of the indirect free cooling type, particularly for conditioning computing centers, of the type comprising: an air/air heat exchanger, inside which two air flows, exchange heat: a primary air flow from and toward an environment to be air-conditioned, and a secondary air flow, or process flow, drawn from outside, first fans for moving the primary air flow, second fans for moving the secondary air flow.

Abstract: An inverter, a method and a device for controlling the inverter are provided, to improve efficiency of the inverter. The inverter includes a three-level active clamped topology including a first and second bus capacitors and an inverter circuit, the inverter circuit includes a first switch transistor to a sixth switch transistor. The inverter further includes a seventh switch transistor and an eighth switch transistor; the seventh switch transistor and the eighth switch transistor are connected in series between the positive direct current bus and the negative direct current bus in a same direction, and a serial point of the seventh switch transistor and the eighth switch transistor is connected to a serial point of the second switch transistor and the third switch transistor; and the seventh switch transistor and the eighth switch transistor are anti-parallel connected to corresponding diodes respectively.

Abstract: The present invention discloses a control method and device for a circuit with a bridge arm of a switch. The soft switching converter comprises at least two bridge arms of the switch, and an auxiliary switch assisting in switching of a main switch of the bridge arm of the switch. The control method comprises the steps of: S1. after controlling the auxiliary switch to be turned on for a first period of time, controlling main switches set at the same position of individual bridge arms of the switch to be simultaneously turned on; S2. after a second period of time following a time when the main switches set at the same position of individual bridge arms of the switch are simultaneously turned on, turning off the auxiliary switch. The present invention can reduce system loss and noise, so as to improve efficiency.

Abstract: The present invention discloses a soft switching auxiliary circuit, comprising: an auxiliary coupling inductor configured to receive currents from a respective branch of a main circuit connected to the soft switching auxiliary circuit and perform a current sharing outputting; a clamping diode configured to receive an inductive voltage from the auxiliary coupling inductor and feed the inductive voltage back to a main switch transistor of the main circuit; an auxiliary switch transistor configured to receive a current from the main switch transistor of the main circuit and output the current to the clamping diode. The present invention further discloses a three-level three-phase zero-voltage conversion circuit. By means of the present invention, it is possible to reduce hard switching loss, to improve system switching frequency, to improve efficiency and to reduce electromagnetic interference.

Abstract: An Uninterrupted Power Supply (UPS) power supply system is provided, which includes: a filter module connected to a mains supply and configured to filter an input from the mains supply; a BOOST module, where a first terminal of the BOOST module is connected to the filter module via a first switch group and connected to a battery via a second switch group, and a second terminal of the BOOST module is connected to a positive bus and a negative bus; and a bi-directional Direct Current/Direct Current (DC/DC) module, where a first terminal of the bi-directional DC/DC module is connected to the battery, and a second terminal of the bi-directional DC/DC module is connected to the positive bus and the negative bus.

Abstract: A heat exchange device for air cooling for conditioning and climate control systems for server rooms and the like, which comprises: an air/air heat exchanger, designed to be passed through by a primary air stream along a first trajectory from an intake region to an outflow region and by a secondary air stream along a second trajectory from a corresponding intake region to a corresponding outflow region, water dispensing elements adapted to wet the heat exchanger downward from above, elements of collecting the water that descends from the heat exchanger, a recirculation pump for returning the air-cooling water from the collection elements up to the dispensing elements arranged above the heat exchanger; the water dispensing elements comprise a plurality of nozzles arranged side by side, or rows of nozzles, which are adapted to dispense water with a flow-rate that decreases starting from the intake region for the primary air stream toward the outflow region of the heat exchanger.

Abstract: A power supply system and method includes a power grid input unit and a diesel generator input unit, separately used for supplying an alternating current to a power supply unit. An automatic transfer switch unit is connected to the power grid input unit and the power supply unit or connected to the diesel generator input unit and the power supply unit, which is used for converting the received alternating current into a direct current. A control unit, which is used for monitoring a current load current and current diesel generator power, determines when to turn off a preset number of power supply loads according to a magnitude relationship between the current diesel generator power and the current load power, as well as according to priority levels of current loads.

Abstract: Provided is an inductor winding method and an inductor winding device. The inductor winding method comprises steps of: A. dividing turns of coil of each winding of the inductor into a first winding and a second winding based on a preset ratio; B. winding the first winding on one of multiple magnetic columns, and winding the second winding on another one of the multiple magnetic columns which is different from the magnetic column on which the first winding is wound; and C. performing step A and step B cyclically until all the windings of the inductor are wound. With a coupling inductor having interleaving-wound structure, power frequency magnetic fluxes generated by magnetic lines in magnetic columns counteract one another, thereby solving the problem of high magnetic flux density in a magnetic core while achieving certain leakage inductance.

Abstract: A method and a device for controlling a Vienna-like three-level circuit are provided. The method includes: detecting an inductor current of an inductor connected to each operating high-frequency bridge arm in the Vienna-like three-level circuit during a positive half cycle of an AC input voltage; and in a case that a freewheeling switch transistor on the high-frequency bridge arm to which the inductor is connected is in an on state, and a main switch transistor is in an off state, controlling the freewheeling switch transistor to maintain in the on state and the main switch transistor to maintain in the off state if the detected inductor current does not reach a preset negative current, and controlling the freewheeling switch transistor to be turned off and the main switch transistor to be turned on if the detected inductor current reaches the preset negative current.

Abstract: Control method and device for I-type three-level circuit are disclosed, which can realize zero-voltage turn on of switching tube of high-frequency bridge arm, reduce circuit loss and improve circuit efficiency. The control method includes: detecting a current of an inductor connected with each of high-frequency arm bridges in operation state in the circuit; in a positive half cycle of AC connection terminal voltage of the circuit, when a freewheeling switching tube of the high-frequency arm bridge connected with the inductor is in ON state and a main switching tube is in OFF state, controlling the freewheeling switching tube to keep in ON state and the main switching tube to keep in OFF state if the current does not reach a preset negative current, and controlling the freewheeling switching tube to be turned off and the main switching tube to be turned on if the current reaches the preset negative current.

Abstract: According to some aspects of the present disclosure, systems and methods are disclosed for cabinet frames, including frame members coupled together via corner copulas. Frame members may include external and internal channels and surfaces for mounting external and internal components. Systems and methods are also disclosed for coupling the frame members and corner copulas.

Abstract: The present invention relates to a feedback device for a power supply, including a main feedback module, an auxiliary feedback module and a feedback control module. The main feedback module is adapted to sample a voltage on a main output branch of the power supply, and output a main feedback voltage to the feedback control module. The auxiliary feedback module is adapted to reduce the main feedback voltage when a voltage on an auxiliary output branch of the power supply drops. The feedback control module is adapted to control the power supply to increase its power output when the main feedback voltage decreases, so that the voltage on the auxiliary output branch is restored to normal. By using the power supply feedback device of the present invention, the circuit is simple, not only solving voltage sag problems, but also ensuring the power density and cost.

Abstract: A cooling fixture for molded components includes a support surface, at least two brackets coupled to the support surface, and at least one roller having a central axis. The roller is coupled between the brackets for rotating about its central axis and is positioned for contacting a portion of a molded component and rotating about its central axis as necessary to align the molded component and substantially inhibit gouging of the molded component when the molded component is placed in the cooling fixture for cooling. Additional cooling fixtures and related methods are also disclosed.

Abstract: According to some aspects of the present disclosure, systems and methods are disclosed for cabinet frames, including frame members coupled together via corner copulas. Frame members may include external and internal channels and surfaces for mounting external and internal components. Systems and methods are also disclosed for coupling the frame members and corner copulas.

Abstract: According to some aspects of the present disclosure, systems and methods are disclosed for cabinet frames, including frame members coupled together via corner copulas. Frame members may include external and internal channels and surfaces for mounting external and internal components. Systems and methods are also disclosed for coupling the frame members and corner copulas.

Abstract: According to some aspects of the present disclosure, systems and methods are disclosed for cabinet frames, including frame members coupled together via corner copulas. Frame members may include external and internal channels and surfaces for mounting external and internal components. Systems and methods are also disclosed for coupling the frame members and corner copulas.

Abstract: A conditioning unit of the free cooling type, particularly for conditioning computing centers, of the type comprising: a water evaporation device for cooling a conditioning air flow; fans for moving the conditioning air flow; an auxiliary electric power supply unit; elements for detecting and signaling a type of electric power supply that is active, whether from an electrical grid or from the auxiliary power supply unit, elements for measuring the electric power absorbed by the conditioning unit, an electronic control and management unit, preset to control the fans in order to limit the speed and power absorption of each one of the fans.

Abstract: There is provided a grounding detection device and method. The grounding detection device may include an insulation tester and a grounding resistance providing unit. The insulation tester may be mounted in a first cabinet, electrically connected to a positive busbar and a negative busbar to detect an equivalent busbar-to-ground resistance, and grounded via the first cabinet. The grounding resistance providing unit may be mounted at least in part in a second cabinet different from the first cabinet, electrically connected to at least one of the positive busbar and the negative busbar to provide a grounding resistance, and grounded via the second cabinet. The insulation tester may determine, based on resistance values of the equivalent busbar-to-ground resistance and the grounding resistance, whether there is a ground fault or not for the insulation tester, the first cabinet, and the second cabinet.

Abstract: A conditioning system of the free cooling type for environments and particularly for computing centers, which comprises: a conditioning unit of the free cooling type, which in turn comprises an air/air heat exchanger, inside which two air flows exchange heat, a primary air flow, from and toward an environment to be air-conditioned, and a secondary air flow, or process flow, drawn from outside, and evaporative cooling elements using water, first fans for moving the primary air flow, second fans for moving the secondary air flow, detectors for detecting temperature and humidity for the primary air flow and the secondary air flow at the inlet and at the outlet of the conditioning unit, detectors for detecting the flow-rate of the primary air flow and of the secondary air flow, an electronic control and management unit adapted to collect and process the data detected by the detectors and adapted to determine, on the basis of the outside humidity and temperature values and of the demand for cooling, the operati