CN116722636B

CN116722636B - Power supply device, power supply control method, control device, server, and storage medium

Info

Publication number: CN116722636B
Application number: CN202310963334.8A
Authority: CN
Inventors: 崔学涛; 华要宇; 姚同娟; 史庆鹏; 张凯
Original assignee: Suzhou Inspur Intelligent Technology Co Ltd
Current assignee: Suzhou Inspur Intelligent Technology Co Ltd
Priority date: 2023-08-02
Filing date: 2023-08-02
Publication date: 2023-11-03
Anticipated expiration: 2043-08-02
Also published as: CN116722636A

Abstract

The invention provides a power supply device, a power supply control method, a control device, a server and a storage medium, belonging to the technical field of computers, wherein the power supply device comprises: a first power supply module and a second power supply module; the full load power of the first power supply module is the product of a first coefficient and a first reference power, the full load power of the second power supply module is the product of a second coefficient and the first reference power, the power supply module comprises a first power supply module and a second power supply module, the first reference power is the full load output reference power of a single power supply module, the sum of the first coefficient and the second coefficient is equal to 2, the first coefficient and the second coefficient are positive numbers, and the first coefficient is smaller than the second coefficient. By configuring that the full-load power of the first power supply module is smaller than that of the second power supply module, the power supply conversion efficiency of the first power supply module is higher under the light load condition, and the efficiency of the whole machine in the light load condition can be effectively improved.

Description

Power supply device, power supply control method, control device, server, and storage medium

Technical Field

The present invention relates to the field of computer technologies, and in particular, to a power supply device, a power supply control method, a control device, a server, and a storage medium.

Background

The rack-mounted server generally comprises a plurality of controllers and a plurality of power supply units (Power Supply Unit, PSU), the outputs of the PSUs are connected in parallel to supply power to the system together, the redundant power supply is realized firstly to meet the high-power requirement of the system, the power supply of the whole machine is not affected after one or more of the PSUs fails, and the reliability is improved.

Since the output efficiency of PSU varies with load size, efficiency may decrease at light loads. How to improve the efficiency of the whole machine under light load is a problem to be solved in the industry at present.

Disclosure of Invention

Aiming at the problems existing in the prior art, the embodiment of the invention provides a power supply device, a power supply control method, a control device, a server and a storage medium.

In a first aspect, the present invention provides a power supply device, comprising: at least one first power supply module and at least one second power supply module, each power supply module being electrically connected to a load;

the full power of the first power supply module is the product of a first coefficient and a first reference power, and the full power of the second power supply module is the product of a second coefficient and the first reference power;

the first reference power is full-load output reference power of a single power supply module, which is determined based on the preset full-load power of the whole machine and the total module number of the power supply modules, the sum of the first coefficient and the second coefficient is equal to 2, the first coefficient and the second coefficient are positive numbers, and the first coefficient is smaller than the second coefficient.

Optionally, according to the power supply device provided by the invention, when the power supply device supplies power to the load through one or more groups of power supply modules, a first power supply module in the power supply modules is used for supplying power to the load according to the first output power;

the second power supply module in the power supply module is used for supplying power to the load according to the second output power;

the power supply module comprises a first power supply module and a second power supply module, the first output power is the product of the first coefficient and a second reference power, the second output power is the product of the second coefficient and the second reference power, and the second reference power is the current-sharing output reference power of the single power supply module determined based on the load power consumption and the group number of the power supply modules.

Optionally, according to the present invention, there is provided a power supply device, the power supply module includes: a control unit, a voltage follower and a power unit;

the first input end of the control unit is electrically connected with the output end of the power unit, the second input end of the control unit is electrically connected with the current sharing bus, the first output end of the control unit is electrically connected with the input end of the voltage follower, and the second output end of the control unit is electrically connected with the controlled end of the power unit;

The output end of the voltage follower of each power supply module is electrically connected with the current equalizing bus;

the control unit is used for acquiring an actual current value of the output end of the power unit through the first input end;

determining a current normalization value based on a normalization coefficient and an actual current value, and outputting the current normalization value through the first output end, wherein the normalization coefficient is determined based on the full power of the power supply module;

acquiring a current sharing bus current normalization value through the second input end;

determining a power control signal based on the current normalization value and the current-sharing bus current normalization value, and outputting the power control signal through the second output end so as to reduce the difference between the current normalization value and the current-sharing bus current normalization value;

the voltage follower is used for:

the output end of the voltage follower outputs the current normalization value under the condition that the current normalization value is larger than or equal to the current normalization value of the current sharing bus;

and under the condition that the current normalization value is smaller than the current normalization value of the current sharing bus, the output end of the voltage follower follows the current normalization value of the current sharing bus.

Optionally, according to the power supply device provided by the invention, the control unit is used for:

performing difference on the current normalization value and the current normalization value of the current sharing bus to determine a difference value;

based on the difference, a power control signal in the form of pulse width modulation is generated.

determining a target duty ratio by an incremental proportional-integral-derivative PID control algorithm based on the difference value;

the power control signal is generated based on the target duty cycle.

Optionally, according to the power supply device provided by the invention, the voltage follower comprises a low-pass filtering unit, an operational amplifier and a diode;

the input end of the low-pass filter unit is electrically connected with the first output end of the control unit, the output end of the low-pass filter unit is electrically connected with the non-inverting input end of the operational amplifier, and the inverting input end of the operational amplifier is electrically connected with the cathode of the diode through a first resistor;

the output end of the operational amplifier is electrically connected with the positive electrode of the diode, and the negative electrode of the diode is electrically connected with the current sharing bus.

Optionally, according to the present invention, there is provided a power supply device, the low-pass filtering unit includes: the first end of the second resistor is electrically connected with the first output end of the control unit, the second end of the second resistor is electrically connected with the first end of the capacitor, the second end of the second resistor is electrically connected with the non-inverting input end of the operational amplifier, and the second end of the capacitor is grounded.

Optionally, the power supply device provided by the invention further comprises a controller, wherein the controller is electrically connected with each power supply module, and the controller is used for:

generating a working mode instruction based on load power consumption and sending the working mode instruction to each power supply module;

the working mode instruction is used for indicating that the power supply module is in an operation mode or indicating that the power supply module is in a cold redundancy mode.

Optionally, according to the present invention, there is provided a power supply device, the controller is configured to:

comparing the power consumption of the load with a power consumption threshold, wherein the power consumption threshold is determined based on the power corresponding to the highest power conversion efficiency point of the first power supply module;

and if the load power consumption is smaller than or equal to the power consumption threshold, generating a first working mode instruction, wherein the first working mode instruction is used for indicating that one first power supply module is in an operation mode, and the rest power supply modules are in a cold redundancy mode.

Optionally, according to the power supply device provided by the invention, each power supply module is electrically connected with the data bus, and the target power supply module is used for generating an operating mode instruction based on load power consumption and sending the operating mode instruction to the data bus;

the target power supply module is determined by negotiating through the data bus, and the working mode instruction is used for indicating that the power supply module is in an operation mode or indicates that the power supply module is in a cold redundancy mode.

In a second aspect, the present invention further provides a power supply control method, applied to the power supply device described in any one of the above, the method including:

Optionally, according to the power supply control method provided by the invention, the method further includes:

If the load power consumption is determined to be larger than the power consumption threshold, determining power conversion efficiency corresponding to a plurality of power supply modes respectively based on the load power consumption;

determining a target power supply mode based on power supply conversion efficiency corresponding to the power supply modes respectively;

controlling the working mode of each power supply module based on the target power supply mode;

the power supply system comprises a plurality of power supply modes, a plurality of power supply modules and at least one power supply module, wherein the power supply modes comprise a first power supply mode, a second power supply mode and at least one third power supply mode, the first power supply mode is a mode of supplying power to a load through a single first power supply module, the second power supply mode is a mode of supplying power to the load through a single second power supply module, the third power supply mode is a mode of supplying power to the load through one or more groups of power supply modules, and the power supply modules comprise a first power supply module and a second power supply module.

Optionally, according to the power supply control method provided by the present invention, when the target power supply mode is the first power supply mode, the controlling the working mode of each power supply module based on the target power supply mode includes:

and generating the first working mode instruction based on the target power supply mode.

Optionally, according to the power supply control method provided by the present invention, when the target power supply mode is a third power supply mode, the controlling, based on the target power supply mode, the working mode in which each power supply module is located includes:

determining a target group number of power supply modules for supplying power to a load based on the target power supply mode;

and generating a second working mode instruction based on the target group number, wherein the second working mode instruction is used for indicating that the power supply modules in at least one group of power supply modules are in an operation mode, the rest power supply modules are in a cold redundancy mode, and the group number of the at least one group of power supply modules is equal to the target group number.

Optionally, according to the power supply control method provided by the present invention, the second working mode instruction is configured to instruct a first power supply module in the power supply module to supply power to a load according to a first output power, and instruct a second power supply module in the power supply module to supply power to the load according to a second output power, and before generating the second working mode instruction based on the target group number, the method further includes:

determining second reference power based on the load power consumption and the target group number, wherein the second reference power is current-sharing output reference power of a single power supply module;

Determining the first output power by calculating a product based on the first coefficient and the second reference power;

the second output power is determined by calculating a product based on the second coefficient and the second reference power.

Optionally, according to the power supply control method provided by the present invention, the determining, based on the load power consumption, power conversion efficiency corresponding to each of a plurality of power supply modes includes:

acquiring a first power conversion efficiency curve corresponding to the first power supply module and a second power conversion efficiency curve corresponding to the second power supply module, wherein the power conversion efficiency curves are used for representing the corresponding relation between power conversion efficiency and power output power;

and determining the power conversion efficiency corresponding to the power supply modes respectively based on the load power consumption, the first power conversion efficiency curve corresponding to the first power supply module and the second power conversion efficiency curve corresponding to the second power supply module.

Optionally, according to the power supply control method provided by the present invention, the obtaining a first power conversion efficiency curve corresponding to the first power supply module and a second power conversion efficiency curve corresponding to the second power supply module includes:

Determining a first power conversion efficiency curve corresponding to the first power supply module and a second power conversion efficiency curve corresponding to the second power supply module based on preset power conversion efficiency data;

or determining a first power conversion efficiency curve corresponding to the first power supply module and a second power conversion efficiency curve corresponding to the second power supply module by actually measuring the power conversion efficiency of the power supply module.

In a third aspect, the present invention further provides a power supply control device, applied to any one of the above power supply devices, the power supply control device including:

the comparison module is used for comparing the magnitude between the power consumption of the load and a power consumption threshold value, and the power consumption threshold value is determined based on the power corresponding to the highest power conversion efficiency point of the first power supply module;

and the generating module is used for generating a first working mode instruction if the load power consumption is determined to be smaller than or equal to the power consumption threshold value, wherein the first working mode instruction is used for indicating that one first power supply module is in an operation mode, and the rest power supply modules are in a cold redundancy mode.

In a fourth aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a power supply control method as described in any of the above.

In a fifth aspect, the present invention also provides a server, including: a load and a power supply device as claimed in any one of the preceding claims, the power supply device being electrically connected to the load.

The power supply device, the power supply control method, the control device, the server and the storage medium provided by the invention can ensure that the full load power of the first power supply module meets the design index by setting the full load power of the first power supply module as the product of a first coefficient and a first reference power, setting the full load power of the second power supply module as the product of a second coefficient and the first reference power, setting the sum of the first coefficient and the second coefficient to be equal to 2, ensuring that the sum of the full load power of the first power supply module and the full load power of the second power supply module is equal to twice the full load output reference power, simultaneously ensuring that the full load power of the first power supply module is smaller than the second coefficient, further ensuring that the full load power of the first power supply module is smaller than the full load output reference power under the light load condition (the power required by the light load is generally lower than 50% of the full load power of a single power supply module), and realizing that the full load power conversion efficiency of the single power module is higher than the full load power required by the single power module by the light load module by the first power conversion module by 50% under the condition that the light load power is higher than the full load reference power required by the common power conversion module under the condition of the light load power of the light load condition, and realizing that the full load efficiency is close to 50% of the power required by the single power conversion module under the light load condition, the efficiency of the whole machine in light load is effectively improved.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a graph of efficiency of a platinum PSU provided by the related art;

fig. 2 is a schematic structural diagram of a power supply device provided by the invention;

FIG. 3 is a schematic diagram of a power module according to the present invention;

FIG. 4 is a schematic diagram of a voltage follower according to the present invention;

FIG. 5 is a second schematic diagram of a power module according to the present invention;

FIG. 6 is a schematic flow chart of a power supply control method provided by the invention;

FIG. 7 is a schematic diagram of a power supply control device according to the present invention;

fig. 8 is a schematic structural diagram of a server provided by the present invention.

Detailed Description

In order to facilitate a clearer understanding of various embodiments of the present invention, some relevant background knowledge is first presented as follows.

Fig. 1 is a graph of efficiency of a platinum PSU according to the related art, where the output efficiency of the PSU varies with the load, and the efficiency decreases at light load, and the PSU generally has the highest efficiency at 50% load, as shown in fig. 1, and decreases with increasing or decreasing load. In the related art, multiple PSUs of a server all use the same model specification, and when the power supply system composed of the same PSUs is in light load, the output efficiency of the system becomes lower, for example, when a central processing unit (Central Processing Unit, CPU) is powered down but a complex programmable logic device (Complex Programming Logic Device, CPLD) and a baseboard management controller (Baseboard Management Controller, BMC) are still working, the power consumption requirement of the whole machine is low, and the output efficiency of the PSUs is low. Therefore, a solution is needed to improve the power efficiency of the whole machine under light load.

In order to overcome the above-mentioned drawbacks, the present invention provides a power supply device, a power supply control method, a control device, a server and a storage medium, by configuring that the full load power of a first power supply module is smaller than the full load power of a second power supply module, the efficiency of the whole machine in light load can be effectively improved.

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Fig. 2 is a schematic structural diagram of a power supply device provided by the present invention, as shown in fig. 2, the power supply device includes: at least one first power supply module 201 and at least one second power supply module 202, each power supply module being electrically connected to a load 203;

Specifically, by configuring the full load power of the first power supply module as the product of the first coefficient and the first reference power, configuring the full load power of the second power supply module as the product of the second coefficient and the first reference power, and setting the sum of the first coefficient and the second coefficient to be equal to 2, the full load output reference power of which the sum of the full load power of the first power supply module and the full load power of the second power supply module is equal to twice can be ensured, that is, the full load power of the whole machine can be ensured to meet the design index.

Meanwhile, the first coefficient is smaller than the second coefficient, so that the full load power of the first power supply module is smaller than the full load output reference power, the power required by the light load is generally lower than 50% of the full load power of the single power supply module under the light load condition, the power supply module generally achieves the highest power conversion efficiency under the condition that the output power is 50% of the full load power.

Therefore, the power conversion efficiency of the first power supply module is higher than that of the common power supply module in the related technology under the light load condition, and the efficiency of the whole machine under the light load condition can be effectively improved under the condition that the full load power of the whole machine meets the design index. Therefore, by combining PSUs with different powers to supply power to the whole machine and combining a PSU cold redundancy working mode (supplying power to a load through a single first power supply module under the light load condition), the efficiency of the whole machine under the light load condition can be improved.

Optionally, the number of modules of the at least one first power supply module is equal to the number of modules of the at least one second power supply module.

Alternatively, the power supply device may supply power to the load through a single first power supply module or at least one set of power supply modules, the power supply modules including one first power supply module and one second power supply module.

The following is an alternative example of the present invention, but is not limiting of the invention.

In this example, the number of PSUs in the overall machine is typically a multiple of 2, given that the number of PSUs in the conventional design is 2 xn and the power of a single PSU is P, the present invention replaces the related art scheme with a combination of N PSUs of 0.75 xp power and N PSUs of 1.25 xp power, where 0.75 is the first coefficient and 1.25 is the second coefficient described above, depending on the structural symmetry and PSU supply redundancy requirements. The maximum power supply capacity of the PSU remains unchanged after substitution as indicated by the following equation:

。

Meanwhile, when the whole machine is in a light load state, the low-power PSU is controlled to operate, and the high-power PSU is in a cold redundancy mode, so that the power supply conversion efficiency is improved. Taking n=2 and p=1 KW as an example, the conventional design adopts 4 1KW PSUs for power supply marking as a first scheme, and the invention adopts 2 750W PSUs and 2 1250W PSUs for combined power supply marking as a second scheme, so as to analyze the power conversion efficiency of the comparison system under light load, medium load and full load conditions respectively.

Table 1 table of typical values of conversion efficiency of platinum PSU

Table 1 is a table of power conversion efficiency of the platinum efficiency PSU in the power supply standard CRPS made by the international electrotechnical commission, and for convenience in calculating the efficiency of each load point, it is assumed that the change of efficiency between two points in the table with load is linear. The 4 PSUs can output 4KW of power, the whole machine is powered with 2+2 redundancy, namely, the whole machine can be operated at full power after the 2 PSUs are damaged, so that the full power of the whole machine is 2KW, and the power efficiency of the whole machine under the conditions of 10%, 20%, 50% and 100% of full power (LOAD) is respectively compared and analyzed.

When the power consumption of the whole machine is 10% of full-load power, namely 200W, one 1KW PSU is output by the scheme I, the other three PSUs are in a cold redundancy mode, the 200W corresponds to 20% of load of the 1KW PSU, and the power conversion efficiency is 90%; scheme II outputs one 750W PSU, the other three are in a cold redundancy mode, 200W corresponds to 750W PSU 26.7% load, and the power conversion efficiency is 90.9%.

When the power consumption of the whole machine is 20% of full-load power, namely 400W, 1KW PSU is output by a scheme I, the rest 3 PSUs are in a cold redundancy mode, 400W corresponds to 40% of load of the 1KW PSU, and the power conversion efficiency is 92.7%; scheme II outputs one 750W PSU, the other three are in a cold redundancy mode, 400W corresponds to 750W PSU 53.3% load, and the power conversion efficiency is 93.8%.

When the power consumption of the whole machine is 50% of full-load power, namely 1KW, 2 1KW PSUs are subjected to current sharing output in a scheme I, each PSU outputs 500W power, the rest 2 PSUs are in a cold redundancy mode, the 500W PSU corresponds to 50% of load of the 1KW PSU, and the power conversion efficiency is 94%; the scheme II has equal proportion and current sharing output of 1 PSU 750W and 1 PSU 1250W, output of PSU 750W, output of PSU 1250W and output of PSU 625W, and the rest 2 PSUs are in a cold redundancy mode, and respectively correspond to 50% load of PSU 750W and PSU 1250W, and the power conversion efficiency is 94%.

When the power consumption of the whole machine is 100% of the LOAD power, namely 2KW, 4 1KW PSUs are subjected to current sharing output in a scheme I, each PSU outputs 500W power, 500W corresponds to 50% of the LOAD of the 1KW PSU, and the power conversion efficiency is 94%; the scheme II leads 4 PSUs to output equal-proportion current, 750W PSU output 375W and 1250W PSU output 625W respectively correspond to 50% loads of 750W and 1250W PSUs, and the power conversion efficiency is 94%. The overall power conversion efficiency versus the ratio is shown in table 2.

Table 2 power conversion efficiency comparison table for complete machine

Through the comparison, the scheme II of the invention has higher power conversion efficiency under the condition of lower load, and can effectively save energy.

Thus, compared to the related art where the number of PSUs is 2×n and the power of a single PSU is P, the present invention uses N PSU of 0.75×p power and N PSU combinations of 1.25×p power to replace the original scheme, and the maximum power supply capacity of the PSU after replacement remains unchanged. Meanwhile, when the system is in a light load state, the low-power PSU is controlled to operate, and the high-power PSU is in a cold redundancy mode, so that the power conversion efficiency is improved.

Specifically, the full load power of the first power supply module is lower than the full load power of the second power supply module, if the first power supply module has reached full load according to a conventional current sharing output mode, the second power supply module has not reached full load yet, and overcurrent protection of the first power supply module can be caused when load current continues to increase. In order to avoid the situation, the first power supply module in the power supply module supplies power to the load according to the first output power, the second power supply module in the power supply module is used for supplying power to the load according to the second output power, the first output power is the product of the first coefficient and the second reference power, the second output power is the product of the second coefficient and the second reference power, the first power supply module and the second power supply module in the power supply module can perform equal-proportion current sharing output according to the proportion of full-load power, and the first power supply module and the second power supply module in the power supply module can be guaranteed to achieve full-load simultaneously.

It is understood that one power supply module includes two power supply modules, based on the number of groups of power supply modules, the number of modules of the current power supply module supplying power to the load can be determined, and the current load power consumption divided by the number of modules of the current power supply module supplying power to the load can be used to determine the second reference power, where the second reference power can be understood as a current-sharing output reference power of a single power supply module by adopting a conventional current-sharing output mode.

Alternatively, the second reference power may be determined by the control module based on the load power consumption and the number of groups of the power supply modules, and the first output power may be determined based on the product of the second reference power and the first coefficient, and the second output power may be determined based on the product of the second reference power and the second coefficient.

And the controller can send a control instruction for indicating to supply power according to the first output power to a first power supply module in the power supply module so as to control the first power supply module to supply power to the load according to the first output power, and the control module can also send a control instruction for indicating to supply power according to the second output power to a second power supply module in the power supply module so as to control the second power supply module to supply power to the load according to the second output power, so that equal-proportion current sharing output is realized. The control module may be a controller (such as a BMC or a CPU of a server) or a target power module (the target power module is determined by negotiating the respective power modules through a data bus).

Optionally, the power supply module may further monitor the actual current output by the module, convert the actual current value into a normalized current value based on the full load power of the module, further analyze the difference between the normalized current value of the module and the normalized current values of other modules, and regulate the output power of the module based on the difference, so as to reduce the difference between the normalized current value of the module and the normalized current values of other modules, so as to realize equal-proportion current sharing output.

Optionally, according to the power supply device provided by the present invention, fig. 3 is one of schematic structural diagrams of a power supply module provided by the present invention, and as shown in fig. 3, the power supply module includes: a control unit 301, a voltage follower 302 and a power unit 303;

The voltage follower is used for:

Specifically, the control unit can obtain an actual current value of the power unit through the first input end, calculate a current normalized value through a normalized coefficient, and then output the current normalized value through the first output end. Meanwhile, the control unit can also obtain a current sharing bus current normalization value through the second input end, calculate to obtain a power control signal based on the current normalization value and the current sharing bus current normalization value, and then output the power control signal through the second output end. Therefore, the difference between the current normalization value and the current equalization bus current normalization value can be reduced, and effective control of power is achieved.

It can be understood that, when the current normalization value is greater than or equal to the current normalization value of the current sharing bus, the output end of the voltage follower outputs the current normalization value, the difference between the current normalization value and the current normalization value of the current sharing bus is zero, and the output power of the power unit is not required to be adjusted again; under the condition that the current normalization value is smaller than the current normalization value of the current sharing bus, the difference between the current normalization value and the current sharing bus is not zero, and the output power of the power unit needs to be adjusted so as to reduce the difference between the current normalization value and the current sharing bus.

Because the output end of the voltage follower of each power supply module is electrically connected with the current sharing bus, and the normalization coefficient of each power supply module is determined based on the full load power of the module, each power supply module can reduce the gap between the current normalization value of the module and the current normalization value of the current sharing bus, and equal-proportion current sharing output can be realized.

It is understood that the control unit may generate the power control signal in a pulse width modulated form using the difference between the current normalized value and the current-share bus current normalized value. Specifically, the control unit calculates the difference value of the two values, and generates a corresponding control signal according to the difference value, so as to control the output power of the power supply, reduce the gap between the current normalized value and the current normalized value of the current sharing bus, and realize equal-proportion current sharing output.

the power control signal is generated based on the target duty cycle.

Specifically, by differencing the current normalized value and the current share bus current normalized value, the difference therebetween can be determined. Further, using an incremental Proportional-Integral-Derivative (PID) control algorithm, the target duty cycle may be determined based on the difference. Further, depending on the target duty cycle, a power control signal in the form of pulse width modulation may be generated. Furthermore, by outputting the power control signal, the difference between the current normalization value and the current normalization value of the current sharing bus can be reduced, and equal-proportion current sharing output can be realized.

Optionally, according to a power supply device provided by the present invention, fig. 4 is a schematic structural diagram of a voltage follower provided by the present invention, and as shown in fig. 4, the voltage follower includes a low-pass filter unit 401, an operational amplifier 402, and a diode 403;

the input end of the low-pass filtering unit is electrically connected with the first output end of the control unit, the output end of the low-pass filtering unit is electrically connected with the non-inverting input end of the operational amplifier, and the inverting input end of the operational amplifier is electrically connected with the cathode of the diode through the first resistor 404;

It is understood that the output end of the voltage follower of each power supply module is electrically connected with the current sharing bus, and the diode is used for taking the highest current sharing output voltage of the plurality of power supply modules. When the operational amplifier negative feedback is in action, the output end of the operational amplifier is equal to the voltage of the in-phase input end of the operational amplifier (namely, the output end of the voltage follower outputs the current normalization value under the condition that the current normalization value is larger than or equal to the current normalization value of the current sharing bus), and when the current sharing bus voltage is higher than the current sharing output of the power supply module, the diode breaks the negative feedback function of the operational amplifier to enable the output end of the operational amplifier to follow the highest voltage of the current sharing bus (namely, the output end of the voltage follower follows the current normalization value under the condition that the current normalization value is smaller than the current normalization value of the current sharing bus), so that the current normalization value of the current sharing bus of the output end of the operational amplifier is always larger than or equal to the current normalization value.

It can be understood that the low-pass filtering unit is used for filtering out high-frequency components in the line so as to reduce the influence of the high-frequency components in the line on the voltage following function of the voltage follower and improve the running stability of the voltage follower.

Optionally, according to the power supply device provided by the present invention, as shown in fig. 4, the low-pass filtering unit includes: the first end of the second resistor is electrically connected with the first output end of the control unit, the second end of the second resistor is electrically connected with the first end of the capacitor, the second end of the second resistor is electrically connected with the non-inverting input end of the operational amplifier, and the second end of the capacitor is grounded.

Specifically, the low-pass filtering unit may be an RC filter formed by a resistor and a capacitor, and the RC filter filters the high-frequency component in the line to reduce the influence of the high-frequency component in the line on the voltage following function of the voltage follower, so as to improve the running stability of the voltage follower.

In the above example, the combination of PSUs of different power configurations will create a non-current sharing problem, i.e. when a PSU of 0.75×p power configuration has reached full load, the PSU of 1.25×p power configuration is only 60% loaded, and the load current continues to increase resulting in low power PSU over-current protection.

In order to solve the problem, the present invention introduces a manner of equalizing power of PSU with different power according to power proportion, fig. 5 is a second schematic diagram of a power supply module provided by the present invention, as shown in fig. 5, sampling output current in PSU is implemented by a first analog-to-digital conversion unit ADC1 in a control unit, converting an analog signal into a digital signal, and multiplying the digital signal by a current resolution to obtain a REAL current value i_sense_read. Then, the control unit converts the real current value into an analog signal through an internal digital-to-analog conversion unit DAC and transmits the analog signal to the current sharing bus. The conversion process needs to perform normalization processing, namely, the REAL current value I_SENSE_REAL is multiplied by a normalization coefficient and then is sent to a DAC converter (so as to realize current sharing among PSUs with different powers according to power proportion), the DAC converts full-range output voltage into reference voltage 3.3V, and the ADC and the DAC are 12 bits, 1.5 times (1.5 times to 2 times according to design requirements) of the maximum power of the corresponding PSU when the full-range output is set, and when the output current reaches (750W/12V) multiplied by 1.5=93.75A (wherein 12V represents the output voltage of the PSU), the DAC converts the output voltage into full-range 3.3V when the output current reaches (750W/12V) multiplied by 1.5=93.75A (wherein 12V represents the output voltage of the PSU), and the corresponding digital signal is 4096, so that the normalization coefficient is 4096/93.75=43.7; similarly, when 1250W PSU output current reaches (1250W/12V) ×1.5=156.25a, DAC conversion output voltage is 3.3V, and normalization coefficient is 4096/156.25=26.2.

The normalized value I_SENSE_DAC of DAC output signal current is sent to the non-inverting input end of the operational amplifier opa1 after RC filtering (filtering high frequency component), the inverting input end of opa1 is connected with the output through the resistor R2 to form a voltage follower circuit, the operational amplifier output 12V_LS is used as the current sharing output of the PSU, the 12V_LS of a plurality of PSUs are connected together to form a current sharing bus, and the diode D1 is used for taking the highest one of the current sharing output voltages of the PSU. When the negative feedback of the operational amplifier works, the output 12V_LS of the operational amplifier is equal to the voltage I_SENSE_DAC of the non-inverting input end of the operational amplifier, and when the voltage of the current sharing bus is higher than the current sharing output of the PSU, the diode D1 breaks the negative feedback of the operational amplifier, so that the 12V_LS follows the highest voltage of the current sharing bus, and therefore the 12V_LS is always larger than or equal to the voltage I_SENSE_DAC.

As the I_SENSE_DAC represents the normalized value of the output current of the PSU and the 12V_LS represents the normalized value of the current sharing bus, the normalized value of the output current of the PSU follows the normalized value of the current sharing bus as long as the normalized value and the normalized value are equal, and the purpose of proportional current sharing among multiple PSUs is achieved.

Firstly, a control unit samples the current-sharing bus voltage 12V_LS through a second analog-digital conversion unit ADC2 to obtain a digital signal 12V_LS_ADC, when the current-sharing bus voltage is 3.3V, the full range of ADC sampling is just reached, the digital sampling value is 4096, and is considered to be 1.5 times of the maximum current of PSU, 750W PSU is sampled to 3.3V and converted into 93.75A, and the corresponding resolution is 93.75A/4096=22.9 mA, namely the least significant bit (Least Sigificant Bit, LSB); 1250W PSU samples to 3.3V and converts it to 156.25A, corresponding to a resolution of 156.25A/4096=38.1 mA, i.e. LSB. And then the control unit performs incremental digital PID calculation according to the difference between the normalized value of the output current of the PSU and the normalized value of the current sharing bus, and adjusts the duty ratio of pulse width modulation (Pulse Width Modulation, PWM), so as to adjust the output current of the PSU, enable the normalized value of the output current of the PSU to follow the normalized value of the current sharing bus, and realize the current sharing output of a plurality of PSUs according to the power proportion.

It can be understood that by carrying out normalization processing on the output current values sent to the current sharing bus by the PSU modules with different powers, current sharing between PSUs with different powers according to power proportion can be realized, and output turn-off caused by that low-power PSUs enter overcurrent protection in advance is avoided.

Therefore, the PSU with different power is combined to supply power to the whole machine, the efficiency of the whole machine in light load is improved by combining a PSU cold redundancy working mode, and meanwhile, a current sharing control mode is introduced to realize current sharing of the PSU with different power according to the power proportion.

In particular, the controller may analyze and determine whether to power the load through a single first power module or through one or more groups of power modules based on the load power consumption. If it is determined that power is being supplied to the load by a single first power module, the operating mode command may indicate that the single first power module is in an operational mode and that the other power modules are in a cold redundancy mode. If the power supply to the load is determined through one or more groups of power supply modules, the working mode instruction can instruct the power supply modules in each group of power supply modules to be in an operation mode and instruct other power supply modules to be in a cold redundancy mode, so that the power supply mode can be adjusted in real time according to the power consumption of the load, and the adopted power supply mode can be kept to be adapted to the current power consumption of the load.

Specifically, the power required for light loads is typically less than 50% of the full power of a single power module, while the power module typically achieves the highest power conversion efficiency with an output power of 50% of full power. And comparing the load power consumption with the power consumption threshold value to judge whether the current complete machine is in a light load condition, if the load power consumption is smaller than or equal to the power consumption threshold value, indicating that the current complete machine is in the light load condition, and further generating a first working mode instruction to indicate that a single first power supply module is in an operation mode and other power supply modules are in a cold redundancy mode.

Compared with the prior art that the power is supplied through the single common power supply module with full-load power as full-load output reference power, the invention supplies power through the single first power supply module, the difference between the power required by the light load and 50% of the full-load power of the first power supply module is smaller than the difference between the power required by the light load and 50% of the full-load output reference power, and the power conversion efficiency is higher when the output power of the power supply module is close to 50% of the full-load power, so that the power conversion efficiency of the first power supply module is higher than that of the common power supply module in the prior art under the light load condition, and the efficiency of the whole machine in the light load condition can be effectively improved under the condition that the full-load power of the whole machine meets design indexes.

Specifically, the target power supply module may analyze and determine whether to supply power to the load through a single first power supply module or through one or more groups of power supply modules based on the load power consumption. If it is determined that power is being supplied to the load by a single first power module, the operating mode command may indicate that the single first power module is in an operational mode and that the other power modules are in a cold redundancy mode. If the power supply to the load is determined through one or more groups of power supply modules, the working mode instruction can instruct the power supply modules in each group of power supply modules to be in an operation mode and instruct other power supply modules to be in a cold redundancy mode, so that the power supply mode can be adjusted in real time according to the power consumption of the load, and the adopted power supply mode can be kept to be adapted to the current power consumption of the load.

It can be appreciated that compared with the controller generating the working mode instruction, the target power supply module generating the working mode instruction can save components, simplify circuit hardware design and reduce operation power consumption.

Fig. 6 is a schematic flow chart of the power supply control method provided by the present invention, as shown in fig. 6, applied to any one of the above power supply devices, where the execution body may be the above controller or the target power supply module. The method comprises the following steps:

in step 601, the magnitude between the load power consumption and a power consumption threshold is compared, wherein the power consumption threshold is determined based on the power corresponding to the highest power conversion efficiency point of the first power supply module.

Specifically, the power required for light loads is typically less than 50% of the full power of a single power module, while the power module typically achieves the highest power conversion efficiency with an output power of 50% of full power. And whether the current complete machine is under the light load condition can be judged by comparing the load power consumption with the power consumption threshold, and if the load power consumption is smaller than or equal to the power consumption threshold, the current complete machine is indicated to be under the light load condition.

Step 602, if it is determined that the load power consumption is less than or equal to the power consumption threshold, generating a first operation mode instruction, where the first operation mode instruction is used to instruct one of the first power supply modules to be in an operation mode, and the remaining power supply modules to be in a cold redundancy mode.

Specifically, if it is determined that the load power consumption is smaller than or equal to the power consumption threshold, the current complete machine is indicated to be in a light load condition, and then a first working mode instruction can be generated to indicate that a single first power supply module is in an operation mode, and other power supply modules are in a cold redundancy mode.

Specifically, if it is determined that the load power consumption is greater than the power consumption threshold, it indicates that the current complete machine is not in a light load condition, but in a medium load condition or a heavy load condition, so that power conversion efficiency corresponding to each of the power supply modes can be analyzed based on the current load power consumption, one power supply mode with the highest power conversion efficiency can be used as a target power supply mode, and further, the working mode of each power supply module can be controlled based on the target power supply mode, so that power can be supplied to the load with high efficiency when the complete machine is in the medium load condition or the heavy load condition.

It can be understood that if the highest output power that can be supported by a certain power supply mode is lower than the current load power consumption, it can be determined that the power conversion efficiency corresponding to the power supply mode is 0, so as to indicate that the power supply mode is not suitable for supplying power to the load currently.

It can be understood that in the process of analyzing the power conversion efficiency corresponding to the third power supply mode, the first power supply module and the second power supply module in the power supply module can perform equal-proportion current sharing output according to the proportion of full-load power, and further calculate the power conversion efficiency corresponding to the third power supply mode based on the mode of equal-proportion current sharing output.

Specifically, based on current load power consumption, power conversion efficiencies respectively corresponding to a plurality of power supply modes are analyzed, if the first power supply mode is determined to be one of the power supply modes with highest power conversion efficiency, the first power supply mode can be used as a target power supply mode, and a first working mode instruction is generated to instruct one first power supply module to be in an operation mode, and the rest power supply modules are in a cold redundancy mode, so that power can be supplied to a load with high efficiency when the whole machine is in a medium load condition or a heavy load condition.

Specifically, based on current load power consumption, power conversion efficiencies respectively corresponding to a plurality of power supply modes are analyzed, if a certain third power supply mode is determined to be one of the power supply modes with highest power conversion efficiency, the third power supply mode can be used as a target power supply mode, and a second working mode instruction is generated to instruct power supply modules in at least one group of power supply modules to be in an operation mode, and the rest power supply modules are in a cold redundancy mode, so that power can be supplied to a load with high efficiency when the whole machine is in a medium load condition or a heavy load condition.

Specifically, the full load power of the first power supply module is lower than the full load power of the second power supply module, if the first power supply module has reached full load according to a conventional current sharing output mode, the second power supply module has not reached full load yet, and overcurrent protection of the first power supply module can be caused when load current continues to increase. In order to avoid the situation, the second reference power can be determined based on the load power consumption and the target group number, the product of the first coefficient and the second reference power is calculated, the first output power can be determined, the product of the second coefficient and the second reference power is calculated, the second output power can be determined, and a second working mode instruction can be generated and sent based on the first output power and the second output power, so that the first power supply module in the power supply module supplies power to the load according to the first output power, the second power supply module in the power supply module supplies power to the load according to the second output power, the first power supply module and the second power supply module in the power supply module can perform equal-proportion flow equalization output according to the proportion of full-load power, and the first power supply module and the second power supply module in the power supply module can be guaranteed to reach full-load simultaneously.

Specifically, the energy utilization efficiency of the system can be better estimated and optimized by acquiring the power conversion efficiency curves corresponding to the first power supply module and the second power supply module respectively, and the curves can assist in analyzing the relation between the power output power and the power conversion efficiency.

After the power conversion efficiency curves corresponding to the first power supply module and the second power supply module respectively are obtained, the power conversion efficiency corresponding to each power supply mode can be analyzed by combining the current load power consumption, and then one power supply mode with the highest power conversion efficiency can be used as a target power supply mode, and further the working mode of each power supply module can be controlled based on the target power supply mode, so that the load can be efficiently supplied under the condition that the whole machine is in medium load or heavy load.

Specifically, the preset power conversion efficiency data may be data provided by a manufacturer of the power supply module, and based on the preset power conversion efficiency data, power conversion efficiency curves corresponding to the first power supply module and the second power supply module respectively may be obtained. The power conversion efficiency curves corresponding to the first power supply module and the second power supply module respectively can be obtained through actually measuring the power conversion efficiency of the power supply modules.

According to the power supply control method provided by the invention, under the condition that the whole machine is in light load, the single first power supply module is used for supplying power, the gap between the power required by the light load and 50% of the full load power of the first power supply module is smaller than the gap between the power required by the light load and 50% of the full load output reference power, and the power conversion efficiency is higher when the output power of the power supply module is close to 50% of the full load power, so that the power conversion efficiency of the first power supply module is higher than that of a common power supply module in the related art under the condition of the light load, and the efficiency of the whole machine in light load can be effectively improved under the condition that the full load power of the whole machine meets design indexes.

The power supply control device provided by the invention is described below, and the power supply control device described below and the power supply control method described above can be referred to correspondingly.

Fig. 7 is a schematic structural diagram of a power supply control device according to the present invention, and as shown in fig. 7, the power supply control device is applied to any one of the above power supply devices, and the power supply control device includes: a comparison module 701 and a generation module 702, wherein:

a comparing module 701, configured to compare the load power consumption with a power consumption threshold, where the power consumption threshold is determined based on the power corresponding to the highest power conversion efficiency point of the first power supply module;

the generating module 702 is configured to generate a first operation mode instruction if it is determined that the load power consumption is less than or equal to the power consumption threshold, where the first operation mode instruction is used to instruct one of the first power supply modules to be in an operation mode, and the remaining power supply modules are in a cold redundancy mode.

Fig. 8 is a schematic structural diagram of a server provided by the present invention, as shown in fig. 8, the server includes: a load 203 and any one of the power supply devices 801 described above, the power supply device 801 being electrically connected to the load 203.

In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the power supply control method provided by the above methods, the method comprising:

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power supply device, characterized by comprising: at least one first power supply module and at least one second power supply module, each power supply module being electrically connected to a load;

the first reference power is full-load output reference power of a single power supply module, which is determined based on the preset full-load power of the whole machine and the total module number of the power supply modules, the sum of the first coefficient and the second coefficient is equal to 2, the first coefficient and the second coefficient are positive numbers, and the first coefficient is smaller than the second coefficient;

Under the condition that the power supply device supplies power to a load through one or more groups of power supply modules, a first power supply module in the power supply modules is used for supplying power to the load according to first output power;

the power supply module comprises a first power supply module and a second power supply module;

wherein, the power module includes: a control unit, a voltage follower and a power unit;

the voltage follower is used for:

2. The power supply apparatus according to claim 1, wherein the first output power is a product of the first coefficient and a second reference power, the second output power is a product of the second coefficient and the second reference power, and the second reference power is a current-sharing output reference power of a single power supply module determined based on load power consumption and the number of groups of power supply modules.

3. The power supply device according to claim 1, wherein the control unit is configured to:

4. A power supply device according to claim 3, characterized in that the control unit is adapted to:

the power control signal is generated based on the target duty cycle.

5. The power supply device according to claim 1, wherein the voltage follower comprises a low-pass filter unit, an operational amplifier, and a diode;

6. The power supply device according to claim 5, wherein the low-pass filtering unit includes: the first end of the second resistor is electrically connected with the first output end of the control unit, the second end of the second resistor is electrically connected with the first end of the capacitor, the second end of the second resistor is electrically connected with the non-inverting input end of the operational amplifier, and the second end of the capacitor is grounded.

7. The power supply of any one of claims 1-6, further comprising a controller electrically connected to each power supply module, the controller configured to:

8. The power supply of claim 7, wherein the controller is configured to:

9. The power supply device according to any one of claims 1-6, wherein each power supply module is electrically connected to a data bus, and the target power supply module is configured to generate an operation mode command based on load power consumption and send the operation mode command to the data bus;

10. A power supply control method, characterized by being applied to the power supply device according to any one of claims 1 to 9, the method comprising:

11. The power supply control method according to claim 10, characterized in that the method further comprises:

12. The power supply control method according to claim 11, wherein, in the case where the target power supply mode is the first power supply mode, the controlling the operation mode in which each power supply module is located based on the target power supply mode includes:

13. The power supply control method according to claim 11, wherein, in the case where the target power supply mode is a third power supply mode, the controlling the operation mode in which each power supply module is located based on the target power supply mode includes:

14. The power supply control method according to claim 13, wherein the second operation mode instruction is configured to instruct a first power supply module in the power supply module to supply power to the load according to the first output power, and instruct a second power supply module in the power supply module to supply power to the load according to the second output power, and before generating the second operation mode instruction based on the target group number, further includes:

15. The power supply control method according to claim 11, wherein determining power conversion efficiencies respectively corresponding to a plurality of power supply modes based on the load power consumption includes:

16. The power supply control method according to claim 15, wherein the obtaining a first power conversion efficiency curve corresponding to the first power supply module and a second power conversion efficiency curve corresponding to the second power supply module includes:

17. A power supply control device, characterized in that it is applied to the power supply device according to any one of claims 1 to 6, comprising:

18. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the power supply control method according to any one of claims 10 to 16.

19. A server, comprising: a load and a power supply device according to any one of claims 1-9, said power supply device being electrically connected to said load.