CN104978003A - Method for compensating 12V voltage drop of RACK server system - Google Patents

Abstract

The invention provides a method for compensating 12V voltage drop of a RACK server system, and relates to the field of RACK server power supply. According to the method, a node in a RACK is utilized for monitoring a PMBus of a power supply and communicates with PSU of the RACK, and current voltage of the node is fed back to the PSU through the PMBus; when the PSU receives a voltage signal from the current node, the output voltage of the PSU is automatically regulated according to the received voltage value to meet normal demands of the node on power supply voltage of the PSU; and therefore, automatic compensation of 12V voltage drop at the node end is realized.

Description

A kind of compensation method realizing RACK rack server system 12V pressure drop

Technical field

The present invention relates to server RACK for electrical domain, particularly relate to a kind of compensation method realizing RACK rack server system 12V pressure drop.

Background technology

Along with the fast development of internet, the arrival in cloud computing epoch, user gets more and more to the demand of server custom.For the demand that user is different, form (comprising: tower server, rack server, blade server, rack enclosure product etc.) and the configuration of corresponding server are also had nothing in common with each other.Current rack enclosure product is becoming main force's product of data center server.Along with the form of single node can get more and more, the more and more higher power consumption of thereupon bringing of calculated performance is more and more higher; Like this, will be increasing at the electric current of copper bar 12V, loss increases thereupon; Also can produce larger pressure drop at the 12V of single node input end, loss can strengthen, and affects node stability.And the current voltage that can only improve 12V in advance, does not have compensation mechanism.

Summary of the invention

For overcoming the above problems, the present invention analyzes from RACK construction for electricity, proposes a kind of compensation method realizing RACK rack server system 12V pressure drop.

Power in topological structure in existing RACK rack, rack PSU and node are except copper bar is connected power supply, and there is no other links or communication, the pressure drop that the voltage that PSU will be caused like this to export is transmitted between node by copper bar does not compensate; The pressure drop of 12V is excessive, node supply voltage may be caused too low, the stability of influential system.This method is the PMBus bus utilizing the node in RACK rack to carry out monitoring power supply, and the PSU of incorporating mill cabinet communicates, and the present input voltage on node is fed back to PSU by PMBus; Receive the voltage signal on present node as PSU after, automatically can regulate the output voltage of self according to received magnitude of voltage; Compensate the pressure reduction that PSU exports and node inputs, make node input voltage in a reliable and stable scope.

The hot-swapping controller of node power input has PMBus monitoring function, increases a PMBus bus for PSU and node communication between PSU and node.

Node voltage monitoring unit passes to PSU the voltage of in real time monitoring by PMBUS bus, and PSU adjusts self output voltage more automatically according to the voltage of present node input end.

PSU can go the hot-swapping controller of access node to obtain the input voltage of present node with interval time by PMBus as the main equipment of PMBus.

The ultimate principle of the method is as follows:

When there being the extra high node of power consumption in RACK rack (as GPU node), the electric current required for it is with regard to Hui Bian great, and electric current conducts and will produce larger pressure drop at the input end of node and power output end on copper bar.Meanwhile, the loss of copper bar also can increase.So just need to introduce voltage compensation mechanism (in current RACK rack uncompensated mechanism), improve the stability of system.

Current, in RACK rack, link management substantially all uses PMBUS/I2C to carry out communicating and managing.Therefore, only need management software layer to increase the communication of node to both PMBUS link realizations of power supply.The node voltage monitoring unit hot plug control chip of PMBUS (band) passes to PSU the voltage of monitoring in real time by PMBUS bus, and PSU adjusts self output voltage more automatically according to the voltage of present node input end.Compensate because copper bar conducts the loss brought with this, when making the voltage of node input end under high power consumption state, the voltage of its input end keeps stable, improves the reliability of whole machine cabinet.

Accompanying drawing explanation

Fig. 1 is electric power-feeding structure schematic diagram of the present invention.

Embodiment

Realize situation for what this method for designing was clearly described, be described further by reference to the accompanying drawings.

As shown in Figure 1, a PMBus bus is increased between PSU and node, node will collect node input voltage by PMBus bus and issue PSU by PMBus bus, and PSU receives the output that magnitude of voltage that node sends regulates self automatically, realizes the dynamic compensation of PSU output voltage.Because copper bar causes the pressure reduction that PSU exports and node inputs, make node input voltage in a reliable and stable scope.Thus what strengthen system supplies electrical stability.

Performing step is specific as follows:

1), the hot-swapping controller of node power input needs to have PMBus monitoring function;

2), in RACK topological structure, a PMBus bus for PSU and node communication is increased;

3), PSU needs to be designed to output voltage and can regulate dynamically by PMBus bus;

4), PSU can go the hot-swapping controller of access node to obtain the input voltage of present node with suitable interval time (this time can determine with real system needs) by PMBus as the main equipment of PMBus;

5), PSU to automatically adjust output voltage according to the magnitude of voltage read, and meets node side required voltage value, so just realizes dynamic compensation node side input voltage.

In sum, set up a PMBus bus by PSU and node, the state of the acquisition node input voltage that AC voltage can be real-time, the output according to its status adjustment self carrys out matched node input voltage, thus reaches dynamic adjustments compensation pressure reduction therebetween.

Claims (4)

1. realize a compensation method for RACK rack server system 12V pressure drop, it is characterized in that,

Utilize the node in RACK rack to carry out the PMBus bus of monitoring power supply, the PSU of incorporating mill cabinet communicates, and the present input voltage on node is fed back to PSU by PMBus; Receive the voltage signal on present node as PSU after, automatically can regulate the output voltage of self according to received magnitude of voltage, compensate the pressure reduction that PSU exports and node inputs.

2. method according to claim 1, is characterized in that,

The hot-swapping controller of node power input has PMBus monitoring function, increases a PMBus bus for PSU and node communication between PSU and node.

3. method according to claim 1, is characterized in that,

Node voltage monitoring unit passes to PSU the voltage of in real time monitoring by PMBUS bus, and PSU adjusts self output voltage more automatically according to the voltage of present node input end.

4. method according to claim 1, is characterized in that,

PSU can go the hot-swapping controller of access node to obtain the input voltage of present node with interval time by PMBus as the main equipment of PMBus.