Abstract: A power supply unit includes a housing, a dust-removing apparatus and a fan. The housing includes a rear panel and a top panel. The rear panel defines an air inlet. The fan is mounted to an outer side of the rear panel and aligned with the air inlet. The dust-removing apparatus includes a bracket and a filter. The bracket includes two support plates perpendicularly mounted on an inner side of the rear panel, and the supporting plates are located at two opposite ends of the air inlet. The support plates define a positioning groove parallel to the rear panel. The top panel defines an opening aligned with the positioning groove. The filter can be inserted into the positioning groove through the opening. The filter can be detached from the housing through the opening.

Abstract: A mounting structure includes a casing for receiving a power supply, a connecting member, and a fastener. The casing includes an end wall defining a mounting hole and a positioning hole below the mounting hole. The connecting member includes a connecting plate defining a through hole, and a hook. The fastener extends through the through hole of the connecting member, to latch in the mounting hole of the casing. The hook of the connecting member is latched into the positioning hole of the casing.

Abstract: An alternate current rectifier circuit which includes a first diode, a second diode, a first transistor, a second transistor, a third transistor, and a fourth transistor is power saving. The first diode is connected to the first transistor and the fourth transistor; the second diode is connected to the second transistor and the third transistor. During a positive half cycle of the alternate current, the first transistor and the fourth transistor are switched on and the alternate current flows through the first diode, the first transistor, and the fourth transistor; during a negative half cycle of the alternate current, the second transistor and the third transistor are switched on and the alternate current flows through the second diode, the second transistor, and the third transistor.

Abstract: A power supply circuit includes an alternating current to direct current (AC/DC) converter, an uninterruptible power supply (UPS), a protection circuit, and a power supply unit (PSU). The AC/DC converter converts AC power from the UPS to DC power and transmits the DC power to the PSU through the protection circuit. The protection circuit includes a first resistor, a first switch, a first capacitor, and a microprocessor. At the initial time when the UPS first supplies power to the UPS, the microprocessor turns off the first switch; after a preset time has elapsed, the microprocessor turns on the first switch.

Abstract: A computer power system includes a first power supply unit having a first output end, and a second power supply unit stacked on the first power supply unit and having a second output end adjacent to the first output end, a first power interface board electrically connected to the first output end and perpendicular to an end surface of the first output end, a second power interface board electrically connected to the second output end and perpendicular to an end surface of the second output end, and an electrical connection device. The electrical connection device connects the first power interface board and the second power interface board, such that the first power supply unit and the second power supply unit are electrically connected in parallel to the second power interface board.

Abstract: An alternate current rectifier circuit which includes a first diode, a second diode, a first transistor, a second transistor, a third transistor, and a fourth transistor is power saving. The first diode is connected to the first transistor and the fourth transistor; the second diode is connected to the second transistor and the third transistor. During a positive half cycle of the alternate current, the first transistor and the fourth transistor are switched on and the alternate current flows through the first diode, the first transistor, and the fourth transistor; during a negative half cycle of the alternate current, the second transistor and the third transistor are switched on and the alternate current flows through the second diode, the second transistor, and the third transistor.

Abstract: A power system for a container data center includes an interruptible power supply, a power supply unit and a storage capacitor. The uninterruptible power supply rectifies the inputted AC voltage to a DC voltage output. The power supply unit converts the DC output voltage to a suitable voltage for a load. The storage capacitor is connected between the input terminal of power supply unit and the ground, and placed outside of the power supply unit.

Abstract: A cooling system is used in a server. The server includes an uninterruptible power supply. The cooling system includes a protecting unit, a transformer unit and a alternating current powered fan. The protecting unit is electrically connected to the uninterruptible power supply for suppressing harmful factors in the power provided by the uninterruptible power supply. The transformer unit is electrically connected to the protecting unit for transforming the power outputted from the protecting unit. The alternating current powered fan is connected to the transformer unit for getting power from the transformer unit.