CN113010999B - High-precision current equalizing method, system and medium for power supply module - Google Patents
High-precision current equalizing method, system and medium for power supply module Download PDFInfo
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Abstract
The invention discloses a high-precision current equalizing method for a power module, which comprises the following steps: acquiring data information, acquiring power information in a server and acquiring first information of a plurality of PSU modules in a PSU module; integrating data, integrating a plurality of pieces of first information, and recording the integrated information as second information; performing data synchronization, and sending the power information and the second information to a plurality of PSU modules; adjusting the output state, and adjusting the output state of the PSU module according to the power information and the second information; performing fault judgment, and judging whether a fault occurs according to the condition of a load end connected with the PSU module and the second information; if the fault occurs, executing a fault strategy; through the mode, the power supply current sharing method and the power supply circuit can achieve current sharing of the power supply more accurately by acquiring information of other PSUs, and fault judgment is carried out if a fault occurs, so that the reliability of the PSUs is improved.
Description
Technical Field
The invention relates to the field of power supply current sharing, in particular to a high-precision current sharing method, system and medium for a power supply module.
Background
In practical application, the output parameters (such as voltage, current and power) of a stable power supply cannot meet the requirements, and the stable power supply meeting the parameter requirements has the processes of redevelopment, design and production, so that the cost of the power supply must be increased, the delivery time is prolonged, and the project progress is influenced. Therefore, in practice, a modular construction method is often adopted, a series of modular power supplies with certain specifications are adopted, and the purpose of expanding output voltage, output current and output power is achieved respectively according to a certain series connection or parallel connection mode.
However, the expansion of the power output parameters cannot completely ensure the stable and reliable operation of the whole expanded power system only by a simple series-parallel connection mode. No matter the power module is in diffusion or diffusion, the problems of voltage sharing and current sharing exist, and the difference of the solutions has great influence on the stability and reliability of the whole power expansion system. The main tasks of current sharing are: when the load changes, the output voltage of each power supply changes the same, so that the output current of each power supply is shared according to the power share.
The current sharing method is usually designed from a power supply end, such as an output impedance method, a master-slave setting method, an average current method, a peak current method and the like.
However, in the existing scheme, only the power supply end needs to be started, current sharing is performed by using current sharing buses, voltage, current and the like, current sharing is performed by using a circuit design instead of the system level, for example, a main power failure in a master-slave setting method will bias the output of all power supplies, and the output impedance, the average current and the output current method have various defects such as insufficient precision, incomplete coverage scene and the like.
Disclosure of Invention
The method mainly solves the problems that the current flow equalizing method is insufficient in precision and incomplete in coverage scene.
In order to solve the technical problems, the invention adopts a technical scheme that: the method for high-precision current sharing of the power supply module comprises the following steps:
acquiring data information: acquiring power information in a server and first information of a plurality of PSU modules in a PSU module;
integrating data: integrating the first information, and recording the integrated information as second information;
performing data synchronization: sending the power information and the second information to a plurality of PSU modules;
and (4) executing fault judgment: judging whether the PSU module fails according to the second information; if the fault occurs, executing a fault strategy;
adjusting the output state: and adjusting the output state of the PSU module according to the power information and the second information, and adjusting the output current according to a current sharing mode.
Preferably, the step of adjusting the output current according to the current sharing mode further includes:
when the current sharing mode is a master-slave current sharing mode, dividing the PSU modules into a master module and a plurality of slave modules; or
When the current sharing mode is the maximum current sharing mode, dividing the PSU modules into a main module and a plurality of slave modules according to the second information;
and performing current sharing operation.
Preferably, the step of performing a current sharing operation further includes:
the slave module acquires the first information of the master module according to the second information to obtain third information;
and controlling the output of the slave module to enable the ratio of the current value in the first information of the slave module to the current value in the third information to reach a preset percentage.
Preferably, the step of obtaining the first information of the plurality of PSU modules in the PSU module further includes:
acquiring first information of a plurality of PSU modules in the PSU module;
and saving the first information to a power log.
Preferably, the step of determining whether the PSU module fails according to the second information further includes:
and a first PSU module in the PSU modules detects whether the output state of the first PSU module is abnormal or not through the power supply log, and if the output state is detected to be abnormal, the first PSU module breaks down.
Preferably, the step of executing the failure policy further comprises:
monitoring the state of a load end connected with the first PSU module through an SMBus, and judging whether the load end breaks down or not according to the state of the load end;
if the load end has a fault, sending fault information of the load end to the first PSU module;
after receiving the fault information of the load end, the first PSU module executes a fault protection action;
and if the load end does not have a fault, the first PSU module executes a fault protection action.
Preferably, the performing the failsafe action is as follows: and disconnecting the output of the first PSU module, and returning to the step of acquiring the data information.
The invention also provides a high-precision current equalizing system of the power supply module, which comprises a BMC unit and a PSU module;
the BMC unit is connected with the PSU module; the PSU module is internally provided with a plurality of PSU modules;
the BMC unit is provided with an acquisition module, an integration module, a synchronization module, an adjustment module and a fault module;
the acquisition module is used for acquiring power information in the server and acquiring first information of a plurality of PSU modules in the PSU module;
the integration module is used for integrating a plurality of pieces of first information and recording the integrated information as second information;
the synchronization module is used for sending the power information and the second information to the PSU modules;
the adjusting module is used for adjusting the output state of the PSU module according to the power information and the second information;
the fault module is used for judging whether the PSU module has a fault according to the second information; and if the fault occurs, executing a fault strategy.
Preferably, the adjusting module comprises a first adjusting module, a second adjusting module and a current equalizing module;
the first adjusting module is used for dividing the PSU modules into a main module and a plurality of slave modules;
the second adjusting module is used for dividing the PSU modules into a master module and a plurality of slave modules according to the second information;
the current sharing module is used for executing current sharing operation.
The invention further provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the steps of the method for high-precision current sharing of the power modules are realized.
The invention has the beneficial effects that:
1. the high-precision current sharing method for the power supply modules can realize more-precision current sharing of the power supply by acquiring the information of other PSUs and informing the state of each PSU in the system, and adds fault judgment and fault strategies;
2. the high-precision current sharing system of the power supply module can acquire the information in the PSU module through the BMC unit and send the information to each PSU module, so that each PSU module can accurately know the states of the PSU module and other PSU modules in the system and timely adjust and output the information according to the current sharing mode, and high-precision current sharing is realized.
3. The computer readable storage medium can automatically acquire the information in the PSU module and send the information to each PSU module without manual operation, and the PSU can automatically complete current sharing according to the information, and timely execute fault protection when a fault occurs, so that the reliability of a server is prompted, the condition that the server cannot run is avoided, and the efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart of a high-precision current sharing method for a power module according to embodiment 1 of the present invention;
fig. 2 is a flowchart of a method for high-precision current sharing of a power module according to embodiment 1 of the present invention;
fig. 3 is a schematic diagram of a system architecture for high-precision current sharing of power modules according to embodiment 2 of the present invention;
fig. 4 is a schematic diagram of a BMC unit architecture in a system for high-precision current sharing of a power module according to embodiment 2 of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is noted that in the description of the present invention
BMC (Baseboard Management Controller) is a Baseboard Management Controller;
a PSU (Power supply unit) is a Power supply unit;
the PMBus (Power Management Bus) is an open standard digital Power Management protocol that facilitates communication with a Power converter or other device by defining transport and physical interfaces and command languages;
SMBus (System Management Bus) is a System Management Bus;
the power supply current sharing technology comprises the following steps: when one module can not provide current required by a load, the total load can be provided by adopting a mode of connecting a plurality of modules in parallel, but because the output voltage of each module can not be completely consistent, the output impedance characteristics can be different, the modules are simply connected in parallel, the output current of each module can not be ensured to be completely consistent, the conditions that some modules work at full load and some modules run in no-load can possibly occur, and therefore, the current equalization processing is carried out on a power supply.
The first information is the information of the PSU module in the embodiment, the second information is the information of the PSU module in the embodiment, and the third information is the information of the PSU module of the main module;
the predetermined percentage is 100%.
Example 1
An embodiment of the present invention provides a method for high-precision current sharing of a power module, please refer to fig. 1 and fig. 2, including the following steps:
s100, the BMC unit acquires power information during running in a server;
carrying out data synchronization on the PSU module through the BMC unit;
the PSU module comprises a plurality of PSU modules; the appearance and the structure are unified and standard, the universality can be realized, and the PSU module supplies power to the system. Each PSU module comprises a plurality of power supply units which are connected in series and/or in parallel, and the plurality of power supply units can be connected into a chain structure or a net structure; the embodiment is not limited herein;
the BMC unit acquires information of a plurality of PSU modules in the PSU module through a PMBus protocol; integrating information in the PSU modules into PSU module information;
integrating to merge information in a plurality of PSU modules, wherein the merged information is PSU module information;
the information of the PSU modules comprises voltage information, current information, power consumption information, temperature information and pressure information in each PSU module, and the voltage information, the current information, the power consumption information, the temperature information and the pressure information are stored in a power log.
S200, after a first PSU module in the PSU modules acquires the information, judging whether the output state of the first PSU module is abnormal or not through a power log, if the output state of the first PSU module is detected to be abnormal, adopting a fault strategy by the first PSU module at the moment to avoid the first PSU module from being damaged,
the failure policy is: the first PSU module informs the BMC unit, the BMC unit monitors the condition of a link rear-end device connected with the first PSU module through the SMBus, determines whether the link rear-end device is in a fault such as abnormal load or short circuit of the link, sends the fault information to the first PSU module, and executes fault protection action after the first PSU module receives the fault information sent by the BMC unit;
performing a failsafe action as: the output of the first PSU is disconnected, protecting the first PSU and preventing the effect of the failed first PSU module in time, and the process returns to step S100 again.
The PSU module can only determine the problem of the PSU module itself, and when the subsequent load end has a problem, if the output power of a certain power supply is 0 or the output voltage of a certain power supply deviates from a predetermined value more, the PSU module cannot determine the problem, and needs the BMC to determine the problem.
S300, the BMC unit sends the power information and the PSU module information to a plurality of PSU modules, so that each PSU module can accurately know the states of the PSU module and other PSU modules in the system, and the PSU modules timely adjust the output states of the PSU modules according to the acquired information and the power information;
the specific steps of adjusting the output state of the user in time according to the acquired information and the power information comprise:
the firmware in the PSU module carries out logic judgment and adjusts the output current according to the current sharing mode;
when the current sharing mode is a master-slave current sharing mode, one of the PSU modules is preset as a master module; the other PSU modules are slave modules; performing a current sharing operation;
the current sharing operation is executed as follows: the slave module more finely approaches the information such as the voltage, the current and the power output to the master module according to the information of each PSU sent by the BMC unit, so that the output voltage and the power of the slave module approach the master module, and the ratio of the output current of the slave module to the output current of the master module approaches the preset percentage, thereby realizing high-precision current sharing;
when the current sharing mode is the maximum current sharing mode, the PSU module with the maximum current is used as a main module and the rest are slave modules according to the information sent by the BMC to execute current sharing operation;
the current sharing operation is executed as follows: the slave module more finely approaches the information such as voltage, current and power output to the master module according to the information of each PSU sent by the BMC unit; the output voltage current and the power of the slave module are close to those of the master module, and the ratio of the output current of the slave module to the output current of the master module is close to the preset percentage, so that high-precision current sharing is realized.
Example 2
An embodiment of the present invention further provides a system for high-precision current sharing of a power module, please refer to fig. 3 and 4, including: a BMC unit and a PSU module;
the BMC unit is connected with the PSU module; the PSU module is provided with a plurality of PSU modules;
the BMC unit is provided with an acquisition module, an integration module, a synchronization module, an adjustment module and a fault module;
the acquisition module is used for acquiring power information in the server and acquiring first information of a plurality of PSU modules in the PSU module;
the integration module is used for integrating the first information and recording the integrated information as second information;
the synchronization module is used for sending the power information and the second information to the PSU modules;
the adjusting module is used for adjusting the output state of the PSU module according to the power information and the second information;
the fault module is used for judging whether the PSU module has a fault according to the second information; and if the fault occurs, executing a fault strategy.
The adjusting module comprises a first adjusting module, a second adjusting module and a current equalizing module;
the first adjusting module is used for dividing the PSU modules into a master module and a slave module;
the second adjusting module is used for taking the PSU module with the largest current as a master module and taking the rest of the PSU modules as slave modules according to the information sent by the BMC.
The current sharing module is used for executing current sharing operation, and the current sharing operation is as follows: the slave module more finely approximates the information such as voltage, current and power output to the master module according to the information of each PSU transmitted by the BMC unit; the output voltage current and the power of the slave module are close to those of the master module, and therefore high-precision current sharing is achieved.
Based on the same inventive concept as the method in the foregoing embodiments, an embodiment of the present specification further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for high-precision current sharing of the power modules are implemented as disclosed in the foregoing.
The numbers of the embodiments disclosed in the above embodiments of the present invention are merely for description, and do not represent the advantages or disadvantages of the embodiments.
It will be understood by those skilled in the art that all or part of the steps of the above embodiments may be implemented by hardware, or a program executed by hardware and instructed by a program to be stored in a computer-readable storage medium, where the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (10)
1. A method for high-precision current sharing of a power module is executed on a BMC unit, and comprises the following steps:
acquiring data information: acquiring power information in a server and first information of a plurality of PSU modules in a PSU module;
integrating data: integrating the first information, and recording the integrated information as second information;
performing data synchronization: sending the power information and the second information to a plurality of PSU modules;
and (4) executing fault judgment: judging whether the PSU module fails or not according to the second information; if the fault occurs, executing a fault strategy;
adjusting the output state: and adjusting the output state of the PSU module according to the power information and the second information, and adjusting the output current according to a current sharing mode.
2. The method according to claim 1, wherein the method comprises: the step of adjusting the output current according to the current sharing mode further comprises:
when the current sharing mode is a master-slave current sharing mode, dividing the PSU modules into a master module and a plurality of slave modules; or
When the current sharing mode is the maximum current sharing mode, dividing the PSU modules into a main module and a plurality of slave modules according to the second information;
and executing the current sharing operation.
3. The method according to claim 2, wherein the method comprises: the step of performing a current share operation further comprises:
the slave module acquires the first information of the master module according to the second information to obtain third information;
and controlling the output of the slave module to enable the ratio of the current value in the first information of the slave module to the current value in the third information to reach a preset percentage.
4. The method according to claim 1, wherein the method comprises: the step of obtaining the first information of the plurality of PSU modules in the PSU module further includes:
acquiring first information of a plurality of PSU modules in the PSU module;
and saving the first information to a power log.
5. The method according to claim 4, wherein the method further comprises: the step of judging whether the PSU module has a fault according to the second information further comprises the following steps:
and a first PSU module in the PSU modules detects whether the output state of the first PSU module is abnormal or not through the power log, and if the output state is detected to be abnormal, the first PSU module breaks down.
6. The method according to claim 5, wherein the method further comprises: the step of executing the fault policy further comprises:
monitoring the state of a load end connected with the first PSU module, and judging whether the load end has a fault according to the state of the load end;
if the load end has a fault, sending fault information of the load end to the first PSU module;
after receiving the fault information of the load end, the first PSU module executes a fault protection action;
and if the load end does not have a fault, the first PSU module executes a fault protection action.
7. The method according to claim 6, wherein the method further comprises: the performing the failsafe action acts as: and disconnecting the output of the first PSU module, and returning to the step of acquiring the data information.
8. A high-precision current sharing system of a power module is characterized by comprising a BMC unit and a PSU module;
the BMC unit is connected with the PSU module; the PSU module is internally provided with a plurality of PSU modules;
the BMC unit is provided with an acquisition module, an integration module, a synchronization module, an adjustment module and a fault module;
the acquisition module is used for acquiring power information in the server and acquiring first information of a plurality of PSU modules in the PSU module;
the integration module is used for integrating a plurality of pieces of first information and recording the integrated information as second information;
the synchronization module is used for sending the power information and the second information to the PSU modules;
the adjusting module is used for adjusting the output state of the PSU module according to the power information and the second information;
the fault module is used for judging whether the PSU module has a fault according to the second information; and if the fault occurs, executing a fault strategy.
9. The system according to claim 8, wherein the system further comprises: the adjusting module comprises a first adjusting module, a second adjusting module and a current equalizing module;
the first adjusting module is used for dividing the PSU modules into a master module and a plurality of slave modules;
the second adjusting module is used for dividing the PSU modules into a master module and a plurality of slave modules according to the second information;
the current sharing module is used for executing current sharing operation.
10. A computer-readable storage medium, in which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of a method for high precision current sharing of power modules according to any one of claims 1 to 7.
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