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Power supply circuit

A technology for power supply circuits and protection circuits, which is applied to electrical components, output power conversion devices, etc., and can solve problems such as large surge currents and system damage in the system

Inactive Publication Date: 2013-06-12
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the uninterruptible power supply supplies power to the server at the initial moment, the capacitance contained in the power supply system will cause the entire system to generate a large surge current, which will cause certain damage to the system

Method used

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Embodiment Construction

[0016] refer to figure 1 , the power supply circuit of the present invention is used to supply power to multiple servers 1-N. The first preferred embodiment of the power supply circuit includes an AC / DC converter (AC / DC) 10, an uninterruptible power supply (Uninterruptible Power Supply, UPS ) 12. A protection circuit 15. N power supply units (Power Supply Unit, PSU) A1-AN, wherein the PSU A1-AN are respectively set in different servers 1-N to supply power to the corresponding servers.

[0017] The AC / DC 10 is connected to an external AC power supply 100 to convert the AC power to DC power, and transmit the converted DC power to the PSU A1-AN through the protection circuit 15 to provide DC power for the server. The UPS 12 is connected to the input terminal of the AC / DC 10 to supply power to the servers 1-N when the external AC power supply 100 is powered off.

[0018] The protection circuit 15 includes a resistor R1 , a switch S1 , a capacitor C1 , a current sensing resistor R...

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Abstract

The invention discloses a power supply circuit which comprises an alternating current / direct current converting unit, an uninterruptible power supply, a protective circuit and a power supply unit. The alternating current / direct current converting unit is used for converting voltage of the uninterruptible power supply into direct voltage and providing a direct-current power supply for the power supply unit through the protective circuit. The protective circuit comprises a first resistance, a switch, a first capacitor and a microprocessor. The first terminal of the first resistance is connected with the alternating current / direct current converting unit. The second terminal of the first resistance is connected with the power supply unit and connected with ground through the first capacitor. The microprocessor is connected with the first terminal of the first resistance and the switch. At the initial time of power supplying of the uninterruptible power supply, the microprocessor controls the switch to be opened, and after preset delay time is used up, the microprocessor control the switch to be closed. The power supply circuit controls the switch to be closed and opened in delay time through the microprocessor, and damages caused by the fact that at the initial time of power supplying of the uninterruptible power supply, a surge current occurs can be avoided.

Description

technical field [0001] The invention relates to a power supply circuit, in particular to a power supply circuit for a server. Background technique [0002] In the power supply system of the server, an uninterruptible power supply is generally included. When the external power supply fails and stops supplying power, the uninterruptible power supply will continue to supply power to the server in time. When the uninterruptible power supply supplies power to the server at the initial moment, the capacitance contained in the power supply system will cause the entire system to generate a large surge current, which will cause certain damage to the system. Contents of the invention [0003] In view of the above, it is necessary to provide a power supply circuit that can avoid damage to the server caused by the surge current at the initial moment of power supply by the uninterruptible power supply. [0004] A power supply circuit, including an AC / DC conversion unit, an uninterrup...

Claims

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Application Information

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IPC IPC(8): H02M1/32
Inventor 张德铭张国祥
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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