DC power supply redundancy system

Abstract

A DC power supply redundancy system comprises an automatic switching component and a DC redundancy module. The automatic switching component comprises a first power input end, a second power input end and a power output end. The first power input end is connected with a power-grid power supply unit. The power output end is connected with one AC input end of an AC / DC converter. One DC output end of the DC redundancy module is connected with the second power input end of the automatic switching component. When power supply of the power-grid power supply unit is abnormal, the power output end of the automatic switching component is switched for connecting with the second power input end, thereby supplying a DC redundancy power to the AC / DC converter by the DC redundancy module, wherein the voltage of the DC redundancy power is higher than the lowest working 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

Images