Abstract: An example system includes a failure detection circuit. The failure detection circuit is to detect a failure of a first power source electrically coupled to a first load. The failure detection circuit is to output a first signal indicating the detection of the failure of the first power source. The system also includes a current regulating circuit. The current regulating circuit is electrically coupled to the failure detection circuit. The current regulating circuit is to electrically couple a second power source to the first load based on the first signal output by the failure detection circuit. The current regulating circuit is to restrict a first current from the second power source.

Abstract: One embodiment provides a system for controlling one or more pulse width modulated (PWM) fans. The system can include a control system configured to provide a voltage control signal corresponding to a DC output voltage for the one or more PWM fans. A variable DC voltage source is configured to supply the DC output voltage to the plurality of fans at one of at least two different DC voltages based on the voltage control signal. The DC output voltage from the variable DC voltage source is separate from a PWM control signal that is also supplied to the PWM fans.

Abstract: In various examples, a system comprises a first plurality of power supplies comprising a first plurality of external electrical connectors, and a second plurality of power supplies comprising a second plurality of external electrical connectors. The first plurality of power supplies may be symmetric with the second plurality of power supply about an axis of symmetry. The system further comprises a common fan module. The common fan module comprises a fan to cool the first plurality of power supplies and the second plurality of power supplies, a power inlet, a third plurality of electrical connectors, a fourth plurality of electrical connectors. The third plurality of electrical connectors are capable of being electrically coupled to the first plurality of electrical connectors, and the fourth plurality of electrical connectors are capable of being electrically coupled to the second plurality of electrical connectors.

Abstract: An apparatus and method alternately transmit power from a first active power factor corrector (22, 122, 222), receiving power from a first alternating current (AC) source (27), and a second active power factor corrector (24, 124, 224), receiving power from a second AC source (28) having at least one line or neutral in common with the first AC power source (27) and in parallel with the first active power factor corrector (22, 122, 222), to a load (30). Current circulation from the first active power factor corrector (22, 122, 222) to the second active power factor corrector (24, 124, 224) and from the second active power factor corrector (24, 124, 224) to the first active power factor corrector (22, 122, 222) is inhibited.

Abstract: An automatic transfer switch module includes an automatic transfer switch. The automatic transfer switch may receive a first power from a first power source and a second power from a second power source. The automatic transfer switch may selectively provide one of the first power and the second power to a power supply module.

Abstract: Various examples herein disclose a system comprising a power source, multiple cards, and a power connector. The power source is mounted on multiple cards. The multiple cards each include an edge configured to fit into a memory slot. The power connector is coupled to the power source and located on a side of the multiple cards other than the edge.

Abstract: Plural electric power supplies are connected in parallel to an output bus. The plural supplies include a primary power supply and a redundant switching power supply. The primary power supply is configured to provide output current to a load when the primary power supply is operating normally. The redundant supply is configured to remain online while not providing output current to the load when the primary power supply is operating normally, but to begin providing output current to the load when the primary power supply is not operating normally.

Abstract: Various examples herein disclose a system comprising a power source, multiple cards, and a power connector. The power source is mounted on multiple cards. The multiple cards each include an edge configured to fit into a memory slot. The power connector is coupled to the power source and located on a side of the multiple cards other than the edge.

Abstract: A power converter (14) can include a switching system (18) to convert a direct current (DC) input voltage to an output voltage based on a switching signal having a duty-cycle. A controller (16) can set the duty-cycle of the switching signal, depending on the DC input voltage, to one of a substantially constant value, such that the output voltage follows the DC input voltage in a normal mode, and a value that varies inversely with respect to the DC input voltage, such that the output voltage is substantially constant in another mode.

Abstract: Examples disclose a system comprising a power supply, coupled to an output power and an auxiliary power. The system is further comprising a controller to interrupt the output power through a switch coupled to the output. The controller is to interrupt the output power based a determination the output power is below an output threshold. The controller is further to interrupt the auxiliary power coupled to the output. The controller is to interrupt the auxiliary power based on a determination the auxiliary power is below an auxiliary threshold. Additionally, the system discloses the switch is to disconnect the output power.

Abstract: A power supply system and method are disclosed. The power supply system is to generate a power signal for providing power to a device. The power supply system includes a transmitter to modulate a data signal onto the power signal that is demodulated at the device. The transmitter is further to transmit a separate binary control signal on the power signal to change a state of a digital control parameter associated with the device.

Abstract: Examples herein disclose determining an interval to limit an inrush of current to charge a capacitor. The interval is based on a peak input voltage without exceeding a current limitation. The examples connect and disconnect a switch to charge the capacitor in accordance with the interval.

Abstract: A switching power supply includes power factor correction circuitry and a standby output converter. One or more loads may be coupled to one or more outputs of the switching power supply. The switching power supply is configured to disable the power factor correction circuitry under some load conditions and to enable the power factor correction circuitry under other load conditions. As a consequence, power that would have been drawn by the power factor correction circuitry is conserved when the power factor correction circuitry is disabled.

Abstract: Examples, disclosed herein, energize a first power supply through an enablement of a first relay to provide power to a load while a second power supply remains de-energized through a disablement of a second relay. Additionally, the examples detect a fault associated with the first power supply and de-energize the first power supply through a disablement of the first relay. Further, the examples energize the second power supply through an enablement of the second relay to provide power to the load, in response to the disablement of the first relay.

Abstract: Examples disclose a system comprising a power supply, coupled to an output power and an auxiliary power. The system is further comprising a controller to interrupt the output power through a switch coupled to the output. The controller is to interrupt the output power based a determination the output power is below an output threshold. The controller is further to interrupt the auxiliary power coupled to the output. The controller is to interrupt the auxiliary power based on a determination the auxiliary power is below an auxiliary threshold. Additionally, the system discloses the switch is to disconnect the output power.

Abstract: A method and system including a power supply module. The method and system determine whether the power supply module is in a malfunction state.

Abstract: An automatic transfer switch module includes an automatic transfer switch. The automatic transfer switch may receive a first power from a first power source and a second power from a second power source. The automatic transfer switch may selectively provide one of the first power and the second power to a power supply module.

Abstract: A power factor correcting (PFC) boost converter is to convert an input to an intermediate DC signal. A direct current (DC)-DC converter is to receive the intermediate DC signal and generate an output associated with an online condition. In response to a light-load indication, the PFC boost converter is to assume a disabled status to pass a rectified input to the DC-DC converter. The DC-DC converter is to convert the rectified input to generate the output associated with a light-load condition. The light-load condition output is provided at a voltage lower than the online condition output.

Abstract: An electric energy distribution system may include plural loads configured to receive electric energy from a common feed or branch. Each of the loads may be configured to operate in at least first and second modes such that it may consume current, VA or power up to a first cap when running in its first mode and up to a second cap when running in its second mode. The first cap may be higher than the second cap. A sensor component may monitor a parameter that corresponds to an aggregate amount of electric energy being consumed by all of the plural loads from the common feed or branch. A manager component may be configured, when the parameter meets or exceeds the threshold, to select one of the loads currently running in its first mode and to cause the selected load to run in its second mode.

Abstract: A sharing criteria metric is received for each of three phases of a three-phase power. Loads on power converters receiving the three phase power are adjusted based on the sharing criteria metric of each of the three phases.