Abstract: A fan housing mounting assembly includes an engagement mechanism configured to support a fan module and a housing configured to support the engagement mechanism. The engagement mechanism is pivotally connected to the housing. The assembly further includes a mesh plate including at least one connector coupled to the engagement mechanism. The mesh plate is configured to move with respect to the housing between a first position in which the mesh plate is spaced from the housing and a second position in which the mesh plate is adjacent to the housing. The assembly further includes a spring configured to engage the engagement mechanism. The spring is configured to bias the engagement mechanism to pivot with respect to the housing to present the fan module for removal. When the engagement mechanism is pivoted with respect to the housing, the mesh plate is maintained in the second position.

Abstract: According to one aspect, embodiments of the invention provide an electrical-converter system comprising a printed circuit board including at least a first layer and a second layer, a switching node disposed on the second layer, a first transistor, a second transistor, a third transistor, and a fourth transistor disposed on the first layer, a first conduction path from a source of the first transistor, through the switching node, to a drain of the fourth transistor, the first conduction path having a first length, and a second conduction path from the source of the first transistor, through the switching node, to a drain of the second transistor, the second conduction path having a second length, wherein the first length of the first conduction path is greater than the second length of the second conduction path.

Abstract: Aspects of the disclosure include a filter comprising a first interleaved input, a second interleaved input, an output, a first transformer comprising a first primary winding with N1 turns and a first secondary winding with N2 turns, and a second transformer comprising a second primary winding with N3 turns and a second secondary winding with N4 turns, wherein the first primary winding and the second secondary winding are in series with the first interleaved input and the output, and the first secondary winding and the second primary winding are in series with the second interleaved input and the output.

Abstract: Systems, methods, and computer-readable mediums include detecting and eliminating a three-phase without neutral short-circuit in a load supplied by a power converter. After detecting the short circuit, the current at an output conductor for one of the three-phases is stopped and then resumed after a sufficient amount of current causes a downstream protection device of the faulty load to trip.

Abstract: Techniques for network-management-card-assisted shutdown of hyperconverged infrastructure (HCI) are disclosed. A network management card (NMC) includes: a network interface communicatively coupled with an HCI environment; one or more processors; and one or more non-transitory computer-readable media storing instructions. The instructions, when executed by the one or more processors, cause the one or more processors to perform operations including: receiving, from the HCI environment via the network interface, a selection of a set of shutdown instructions from multiple sets of shutdown instructions supported by the NMC, the multiple sets of shutdown instructions being configured to support shutdown processes for at least two different HCI platforms; detecting that the HCI environment is performing a shutdown; and finalizing the shutdown at least by executing the set of shutdown instructions.

Abstract: According to aspects of the disclosure, an uninterruptible power supply is provided comprising an input configured to be coupled to, and receive input power from, a circuit breaker, an output configured to be coupled to, and provide output power to, at least one load, an energy-storage-device interface configured to be coupled to, and receive back-up power from, an energy-storage device, and at least one controller configured to determine whether a current through the circuit breaker meets at least one over-current criterion, and control, responsive to determining that the current through the circuit breaker meets the at least one over-current criterion, the uninterruptible power supply to provide the output power to the load, the output power being derived from the input power and the back-up power.

Abstract: A multi-transformer assembly includes a first transformer having a first core and a first set of windings, a second transformer having a second core and a second set of windings, and a heatsink positioned between the first core and the second core. The heatsink includes a first side and a second side. The first side of the heatsink is opposite the second side of the heatsink, and thermally coupled to the first core and the first set of windings. The first side is thermally coupled to the first core and the first set of windings by a first thermal conductor. The second side is thermally coupled to the second core and the second set of windings. The second side is thermally coupled to the second core and the second set of windings by a second thermal conductor.

Abstract: UPS systems, methods, and computer-readable mediums utilizing electromechanical bypass relays to switch from an on-line mode of operation to a green/bypass mode of operation include control logic to adaptively adjust the timing of when an inverter of a UPS turns off to prevent backfeeding a utility. After the UPS is instructed to transition from the on-line mode to the green mode, a monitoring period begins. During the monitoring period, a parameter related to the output current of the inverter is monitored and compared to a predetermined threshold. If the parameter exceeds the predetermined threshold before a fixed period time has elapsed, the inverter is turned off early. If the inverter current does not exceed the predetermined value within the fixed period of time, the inverter is turned off.

Abstract: Examples of the disclosure include a battery system comprising an output configured to provide output power to a load, one or more battery cells configured to store electrical energy to provide to the load, and a battery management system configured to receive one or more operational parameters of the battery system, determine whether the one or more operational parameters are less than at least one operational-parameter threshold, modify a discharge threshold of the one or more battery cells responsive to determining that the one or more operational parameters are less than the at least one operational-parameter threshold, and control the battery system to be in a battery-optimization mode responsive to determining that a discharge level of the one or more battery cells is below the discharge threshold.

Abstract: Aspects of the disclosure include a system comprising at least one energy-storage-device connection, a first output connection to be coupled to a main power source providing main power, a second output connection to be coupled to at least one load, a first and second power converter coupled to the at least one energy-storage-device connection, and at least one controller coupled to the power converters and being configured to control the system to connect the power converters to the output connections, control the system to disconnect the first power converter from the second output connection responsive to detecting a fault in the main power, control the first power converter to provide power to the first output connection responsive to detecting the fault in the main power, and control the system to disconnect the second power converter from the first output connection responsive to detecting the fault in the main power.

Abstract: Power supplies and methods of use thereof are provided, where a power supply includes an input configured to receive input AC power an output configured to provide output AC power to a load, at least one power converter coupled to the input and configured to convert the input AC power into the output AC power, a controller coupled the at least one power converter. The controller is configured to adjust at least one parameter of the output AC power provided by the at least one power converter, detect, in response to adjusting the at least one parameter of the output AC power, at least one of an adjusted input AC power or an adjusted output AC power, and determine that a fault has occurred based on the at least one of the adjusted input AC power or the adjusted output AC power.

Abstract: Uninterruptible power supplies, power modules, and non-transitory computer readable mediums storing instructions for operating such power modules, the power modules comprising an input configured to receive AC power from an AC power source, an output configured to provide AC output power to a load, and a plurality of power modules coupled in parallel between the input and the output, each power module of the plurality of power modules configured to provide at least a portion of the AC output power to the output. Each power module of the plurality of power modules comprises a current compensator stage configured to generate a current error signal based on output current of a corresponding power module and a gain adjustment stage configured to adjust the current error signal based on a measurement of the output current and a desired output current of the corresponding power module.

Abstract: Examples of the disclosure include a UPS comprising an output to be coupled to a load, a first converter leg to provide a first voltage to the output and including at least one of a first relay or fuse, a second converter leg in parallel with the first converter leg including at least one of a second relay or fuse and configured to provide a second voltage to the output out of phase with the first converter leg providing the first voltage signal, current sensors coupled to the first and second converter legs, respectively, and configured to provide a first signal indicative of a current in the first converter leg and a second signal indicative of a current in the second converter leg, respectively, and at least one controller to receive the signals, determine a current difference between the converter legs based on the signals, and decrease the current difference.

Abstract: Examples of the disclosure include a microserver system comprising a plurality of microservers, a common hardware bus interconnecting the microservers, each microserver of the plurality of microservers being configured to execute one or more applications, and a controller coupled to the plurality of microservers, the controller being configured to determine, based on application-load data associated with the one or more applications, a first application load of a first set of one or more applications executed by a first microserver of the plurality of microservers and a second application load of a second set of one or more applications executed by a second microserver of the plurality of microservers, determine that a combination of the first application load and the second application load is below a maximum-application-load threshold of the second microserver, and migrate the first set of one or more applications from the first microserver to the second microserver.

Abstract: A battery-charging system configured to charge a battery of a device to a nominal voltage includes a load-detection circuit, memory storing controller-executable instructions, and a controller configured to execute the instructions, which cause the controller to detect a load coupled to the battery above a first threshold load using the load-detection circuit, and control the battery-charging circuit to charge the battery to a high voltage in response to detecting the load above the first threshold load, wherein the high voltage is above the nominal voltage. The controller can be configured to execute other instructions, such as outputting a notification that the battery is being charged to a high voltage and/or controlling the battery-charging circuit to discharge the battery in response to detecting a reduced load or a user command.

Abstract: Aspects of the disclosure include a power supply system is provided comprising first and second inputs, an output, a first group of power modules coupled to the inputs and the output, a second group of power modules coupled to the inputs, and at least one controller configured to control, in a reverse mode, the first group of power modules to provide power derived from the second input to the output, wherein a majority of power provided by each power module of the first group of power modules in the reverse mode is provided to the output, and control, in the reverse mode, the second group of power modules to provide power derived from the second input to the first input, wherein a majority of power provided by each power module of the second group of power modules in the reverse mode is provided to the first input.

Abstract: A power circuit including an input configured to receive input power from an input source, a first output configured to provide LPS output power to a load, a Logic Power Supply (LPS) configured to convert the input power into the LPS output power, the LPS configured to provide, in a first mode, the LPS output power with a first voltage level in response to receiving an indication that the load is being powered by the LPS output power and configured to provide, in a second mode, the LPS output power with a second voltage level in response to receiving an indication that the load is not being powered by the LPS output power, and a first switch configured to couple the LPS to the first output in the first mode and to decouple the LPS from the first output in the second mode.

Abstract: Aspects of the present disclosure are directed to a power distribution device. The power distribution device includes an input to receive power, a plurality of outputs, each output of the plurality of outputs being configured to provide output power, and being coupled to the input, a plurality of switching devices, each switching device of the plurality of switching devices being coupled to a respective output of the plurality of outputs, and a controller coupled to each of the plurality of switching devices. The controller is configured to receive power information indicative of the output power provided by each output of the plurality of outputs, determine, based on the power information, that an overcurrent condition exists, select, based on the power information and based on the determination that the overcurrent condition exists, at least one of the plurality of switching devices to disable, and disable the at least one switching device.

Abstract: Systems, methods, and computer-readable mediums are provided for improving the efficiency of a filter-type oil separator in a cooling system including a compressor that pumps a mixture of lubricating oil and refrigerant through the filter-type oil separator. The filter type oil separator is configured to receive a first portion of the mixture from the compressor, and a bypass line is configured to bypass a second portion of the mixture around the filter-type oil separator. The bypass line ensures a sufficient amount of oil is present in the compressor.