DC Power Backup System

Abstract

A DC power backup system includes an automatic switching element and a DC power backup module, the automatic switching switch element includes a first power input end, a second power input end and a power output end, the first power input The terminal is connected to a grid power supply unit, the power output terminal is connected to an AC input terminal of an AC / DC converter, and a DC output terminal of the DC power backup module is connected to the second power supply input terminal of the automatic switching element; when When the power supply of the grid power supply unit is abnormal, the power output terminal of the automatic transfer switch element is switched and connected to the second power input terminal, so that the DC power backup module provides a DC backup power to the AC / DC converter, wherein the DC The backup power source is greater than the minimum operating voltage of the AC / DC converter.

Description

technical field [0001] The invention relates to a power source backup system, in particular to a DC power source backup system. Background technique [0002] A power supply is a voltage conversion device that converts AC power into DC power. Its input is connected to the mains grid to receive an AC power, and its output is connected to the power input of an electronic device. The power supply is the After the AC power is converted into a DC power, the DC power is output to the electronic device as a working power source for the electronic device. [0003] Electronic devices such as network servers and cloud hard disks are connected to the network during operation and often transmit important data, so these electronic devices have high power requirements. However, there is uncertainty about whether the mains power grid can provide stable power supply. If the power company repairs power generation equipment, has no warning or unexpected power outage, these electronic devices ...

AI Technical Summary

Problems solved by technology

[0004] However, since the working voltage of the electronic equipment is low voltage, generally 12V, the DC voltage provided by the battery device is low voltage. If the output power of the battery device is P, according to the electric power work formula: P=IV, I is the battery device The output current of the battery device, V is the output voltage of the battery device, because the output voltage V of the battery device is inversely proportional to the output current I, so the output current I will be increased under the low voltage condition

In this way, if the line impedance between the battery device and the electronic equipment is expressed as RLINE, RLINE is a constant, and the line loss between the battery device and the electronic equipment is expressed as PLOSS, then PLOSS=I2×RLINE, it can be seen that the larger The output current I will increase the line loss PLOSS, thereby reducing the power supply effect of the battery device

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