Uninterrupted 12V direct-current power system

Abstract

The invention discloses an uninterrupted 12V direct-current power system which comprises an alternating-current input power distribution unit, a high-frequency rectifying circuit and a direct-current output power distribution unit, wherein the alternating-current input power distribution unit, the high-frequency rectifying circuit and the direct-current output power distribution unit are sequentially connected in series. The input end of the direct-current output power distribution unit is in bypass connection with a 12V storage pack charging voltage-stabilizing circuit and a 12V iron-lithium battery pack. The uninterrupted 12V direct-current power system is adopted, the battery pack is configured according to a machine frame and is synchronously built along with a server, and accordingly the charging power of batteries is reduced. A PWM rectifying technique is adopted for a power module, compared with a traditional power frequency UPS power system, the harmonic content of a power system loop is reduced, and requirements for capacity of each stage of power distribution system, cables and capacity of a front end backup generator set are reduced.

Description

technical field [0001] The invention relates to a power supply device, in particular to a 12V DC uninterruptible power supply system applicable to data centers, communication equipment rooms and IT equipment rooms. Background technique [0002] Powering data center servers is essentially converting 220V AC mains power into a stable and reliable 12V reference DC power, and then supplying power to "real loads" such as the CPU, memory, storage devices, and network communication chips inside the server. Power equipment such as UPS, HVDC, and server PSU are means, not ends. In the current data center power supply construction plan, the mains power needs to be transformed several times to generate DC 12V to supply power to the internal chip of the server, and the power utilization rate is very low. [0003] Regarding the UPS load rate-efficiency curve, the data of each manufacturer is not the same, but basically follow the following curve, image 3 It is the UPS load rate-efficie...

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Problems solved by technology

[0010] Depend on Figure 4 It can be seen that in the prior art, the AC input needs to undergo multiple conversions to supply power to the server chip. Every time a conversion is performed, it is accompanied by the on and off losses of the switching components. It can be seen from the analysis when the load is 30%, the power at this time The actual utilization rate η is 81.9%

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