Abstract: A power supply power compensation structure uses a connector as power output ports. The power supply has a feedback signal connector. A power output connector is coupled with a transmission line set which joins another connector to couple with the feedback signal connector. Thereby power output quality can be monitored to maintain optimal output power delivered to electronic devices.

Abstract: Provided is a backup power supply comprising at least one DC/DC power electrically connected to a DC power source for taking DC current therefrom prior to providing regulated DC current, at least one AC/DC power electrically connected to an AC power source for taking AC current therefrom prior to providing rectified DC current, and a power control device including a power balance unit, a power output circuit, and a detection circuit each interconnected the AC/DC power and the DC/DC power. The power control device can combine DC current from both the AC/DC power and the DC/DC power prior to providing to an electronic device (e.g., computer). The invention can continue providing electricity to the computer in the event of not only a malfunctioning of the AC/DC or DC/DC power but also a power outage of either the AC or DC power source.

Abstract: An electric output structure for a multi-layer power supply to integrate electricity for electric processing circuits of a plurality of power supply devices connected electrically to a circuit board. The electric output structure includes an electric bridge which has terminals electrically connecting to the electric processing circuits and a linking section connecting to the terminals. The terminals or linking section has at least one fastening section fastenable to a corresponding coupling section of a fastening terminal formed on a power cord through a retaining member. Thus the power supply connection ports on the circuit board may be increased without adding the electrical coupling circuit to facilitate changing of the power cord.

Abstract: A power supplying system includes a switching control circuit connected to a stand-by power source so as to receive electrical power therefrom. The switching control circuit is further connected to a power-supplying unit and is activated to control operation of the power-supplying unit in a selected one of an ON state, where the power-supplying unit supplies electrical power for operating a heat-dissipating fan, and an OFF state, where the power-supplying unit ceases to supply the electrical power to the heat-dissipating fan.

Abstract: A load balancer is to be used in a power supplying system which includes at least two power supplying units that are connected in parallel to supply power concurrently to operate an electrical load. The load balancer includes at least two sensors, each of which is adapted to generate an ac sensor output corresponding to power output of a respective one of the power supplying units. Each of at least two rectifying and filtering circuits rectifies and filters the ac sensor output of a respective one of the sensors so as to obtain a corresponding dc sensor output. A microprocessor receives the dc sensor outputs from the rectifying and filtering circuits, and calculates an average input value therefrom that corresponds to a balanced power output for the power supplying units.