CN111290558A - Server power supply and power supply method - Google Patents
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F1/26—Power supply means, e.g. regulation thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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Abstract
The invention provides a power supply source and a power supply method for a server, wherein the power supply voltage comprises the following components: the voltage conversion module is connected in series between the PSU power supply and the mainboard and used for boosting the output voltage of the PSU power supply; the main board is connected with a plurality of voltage reduction branches, and a voltage reduction circuit is arranged on each real-time voltage reduction branch; the output end of the voltage reduction branch is connected with a load; the input end of the controller is respectively connected with the output end of the main board and the output end of the voltage reduction branch; and the output end of the controller is respectively connected with the voltage conversion module and the voltage reduction circuit. The invention can solve the problem of through-flow bottleneck of the mainboard, and greatly improves the loading capacity of the server; meanwhile, the high voltage is directly converted into electricity required by the load, and the conversion efficiency can be improved.
Description
Technical Field
The invention belongs to the technical field of servers, and particularly relates to a power supply and a power supply method for a server.
Background
With the development of cloud computing applications, informatization gradually covers various fields of society. People's daily life and daily life are more and more communicated through the network, and the network data volume is also increasing continuously. Meanwhile, the configuration of the server system to be collocated is also increasing, resulting in the continuous increase of the total power of the system.
With the increasing of system power, the power consumption including CPU, memory, GPU, etc. is increasing, and the load of the server power supply is increasing, so the load capacity of the server power supply becomes more and more important, and the whole size of the server cannot be increased with the increase of the power consumption, so the power density of the server is increasing, and the bottleneck thereof is in the part of PCB. The current capacity of the PCB is fixed, and the larger the current is, the larger the required size of the PCB is, which is the biggest bottleneck of increasing the power consumption of the server; meanwhile, another problem caused by the large current is that the large current causes the low conversion efficiency of the voltage of the rear stage when the voltage of the rear stage is converted.
The existing server power supply architecture is supplied to a PSU connector of a mainboard through PSU output of 12V, and power is supplied to other load ends through the PSU connector, and loads including a CPU, a memory, a GPU and the like need to input 12V to perform normal power supply. If the back-end load is too large, the current required by 12V will be very large, that is, the current from the PSU to the load end will be very large. On one hand, the conversion efficiency is low due to the large current, and on the other hand, the size of the copper foil of the main board PCB is limited, so that the 12V current which can be passed by the PCB is limited, and finally, the bottleneck of increasing the power of the server is caused.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention provides a power supply for a server and a power supply method thereof, so as to solve the above-mentioned technical problems.
The invention provides a power supply for a server, which comprises:
the voltage conversion module is connected in series between the PSU power supply and the mainboard and used for boosting the output voltage of the PSU power supply; the main board is connected with a plurality of voltage reduction branches, and a voltage reduction circuit is arranged on each real-time voltage reduction branch; the output end of the voltage reduction branch is connected with a load;
the input end of the controller is respectively connected with the output end of the main board and the output end of the voltage reduction branch; and the output end of the controller is respectively connected with the voltage conversion module and the voltage reduction circuit.
Further, the voltage-reducing circuit includes:
the D pole of the MOS tube is connected with the output end of the main board, and the s pole of the MOS tube is connected with the inductor; the inductor is connected with a load end; the output end of the diode is connected with a line between the s pole of the MOS tube and the inductor, and the input end of the diode is grounded; and the G pole of the MOS tube is connected with the output end of the controller.
Further, the MOS tube is an NMOS tube; the controller adopts a DSP controller.
Furthermore, the voltage conversion module comprises a voltage transformation inductor and a plurality of boosting branches, and each boosting branch comprises a boosting inductor, a boosting diode, a boosting capacitor and a boosting MOS (metal oxide semiconductor) tube; the boosting inductor is opposite to the transformation inductor; one end of the boosting inductor is connected with the input end of the boosting diode, and the other end of the boosting inductor is grounded; the output end of the boost diode is connected with the D pole of the boost MOS tube; the s pole of the boosting MOS tube is connected with the main board; the G pole of the boosting MOS tube is connected with the controller; the output end of the boost diode is connected with a ground wire through a boost capacitor; the boosting inductance loops of the plurality of boosting branches are different.
Furthermore, a switch is arranged on a connecting loop of a transformation inductor of the voltage conversion module and the PSU; and the voltage conversion module comprises three boosting branches, and the output voltages of the three boosting branches are respectively 24V, 36V and 48V.
The invention also provides a power supply method for the server power supply, which comprises the following steps:
collecting load power of a voltage reduction branch and calculating total load power;
calculating input voltage according to the total load power and the current limit value of the main board;
matching a boost circuit according to an input voltage value and enabling the matched boost circuit;
calculating a voltage reduction target duty ratio according to the input voltage and the rated voltage of the load on the voltage reduction branch circuit;
and controlling the MOS tube of the voltage reduction circuit to adjust the duty ratio of the branch circuit to the target duty ratio, and further reducing the input voltage to the rated load voltage.
Further, the calculating the target duty ratio of the step-down according to the input voltage and the rated voltage of the load on the step-down branch includes:
and taking the quotient of the load rated voltage value and the input voltage as a target duty ratio.
Further, the adjusting the duty ratio of the power supply to the duty ratio of the load by the voltage reduction circuit includes:
and controlling the on-off time proportion of the MOS tube in a power supply frequency period by using the DSP according to the load duty ratio.
Further, the method further comprises:
setting the boosting range of each boosting branch circuit according to the boosting output value of the boosting branch circuit;
establishing a mapping relation between the equipment code of the MOS pipe of the boosting branch and the boosting range of the boosting branch;
and establishing a mapping relation between the MOS tube equipment number and the load equipment code under the same voltage reduction branch, and recording the rated voltage corresponding to the load equipment code.
Further, the matching the boost circuit according to the input voltage value and enabling the matching boost circuit includes:
acquiring a boosting range to which the input voltage value belongs;
acquiring a corresponding boosting branch MOS tube equipment code according to the belonging boosting range;
and controlling the corresponding boosting branch MOS tube communication according to the corresponding boosting branch MOS tube equipment code.
The beneficial effect of the invention is that,
the invention provides a power supply and a power supply method for a server, which adjust the input voltage of a mainboard according to load power, improve the power supply voltage by adopting a high-voltage power supply, reduce the current of the mainboard of the server, reduce the power supply voltage of the load to the rated voltage of the load by a voltage reduction circuit, and realize the normal power supply of the high-voltage power supply to the server. The invention can solve the problem of through-flow bottleneck of the mainboard, and greatly improves the loading capacity of the server; meanwhile, the high voltage is directly converted into electricity required by the load, and the conversion efficiency can be improved.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The terms to which the invention relates are to be interpreted as follows:
a dsp (digital signal processor) is a unique microprocessor, which is a device that processes a large amount of information with digital signals. The working principle is that the analog signal is received and converted into a digital signal of 0 or 1, then the digital signal is modified, deleted and strengthened, and the digital data is interpreted back to the analog data or the actual environment format in other system chips.
The BUCK circuit is a common BUCK conversion circuit, and has a basic structure as follows: an equivalent circuit when the switch is switched on; right lower: and when the switch is turned off, the equivalent circuit is formed.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
Referring to fig. 1, the present embodiment provides a server power supply, including:
the voltage conversion module is connected in series between the PSU power supply and the mainboard and used for boosting the output voltage of the PSU power supply; the main board is connected with a plurality of voltage reduction branches, and the real-time voltage reduction branches are provided with voltage reduction circuits; the output end of the voltage reduction branch is connected with a load;
the input end of the controller is respectively connected with the output end of the main board and the output end of the voltage reduction branch; the output end of the controller is respectively connected with the voltage conversion module and the voltage reduction circuit. The load includes: CPU, memory, PCH and GPU, etc.
In this embodiment, the voltage conversion module is a transformer, which can increase the power voltage of the PSU, and the increase value is determined by the controller.
The existing server power supply voltage is usually 12V, and the present embodiment adopts a 24V power supply voltage, and then converts the 24V power supply voltage into a 2.4V load voltage through a voltage reduction circuit to supply power to a load. The voltage reduction circuit can be a common voltage reduction circuit, such as a buck voltage reduction circuit.
If the power of the server is 1200W, the current passing through the input end of the server mainboard is as follows: I-P/U-1200/24-50A, i.e. the PCB of the motherboard needs to support the passage of 50A current, whereas the current generated by the existing server power supply is 100A. Obviously, by applying the power supply provided by the embodiment, the current capacity of the main board only needs to be halved. The problem of through-flow bottleneck of the mainboard can be solved, and the loading capacity of the server is greatly improved; meanwhile, the high voltage is directly converted into electricity required by the load, and the conversion efficiency can be improved.
Example 2
The present embodiment provides a server power supply, including:
the voltage conversion module is connected in series between the PSU power supply and the mainboard and used for boosting the output voltage of the PSU power supply; the main board is connected with a plurality of voltage reduction branches, and the real-time voltage reduction branches are provided with voltage reduction circuits; the output end of the voltage reduction branch is connected with a load;
the controller adopts DSP, and the output of controller is connected voltage conversion module and step-down circuit respectively.
As shown in fig. 2, the voltage reduction circuit adopted in this embodiment includes: the diode voltage reduction circuit comprises a MOS tube Q1, an inductor L1 and a diode D1, wherein the D pole of the MOS tube Q1 is connected with the main board end of the voltage reduction circuit, and the s pole of the MOS tube Q1 is connected with an inductor L1; the inductor L1 is connected with the load end of the voltage reduction circuit; the output end of the diode D1 is connected with a line between the s pole of the MOS tube Q1 and the inductor L1, the input end of the diode D1 is grounded, and the G pole of the MOS tube Q1 is connected with the output end of the DSP. The MOS tube adopts an NMOS tube.
The voltage reduction circuit provided by the embodiment has the advantage of wide input range, namely the input can be 24V or higher. Such as: 36V, 48V, etc., the higher the input voltage, the less current through the motherboard and the stronger the load capability of the motherboard. Therefore, even if the voltage of the high-voltage input is dynamic, the voltage reduction circuit provided by the embodiment can finally output a constant low voltage.
The voltage reduction principle of the voltage reduction circuit is as follows:
DSP can sample the voltage value of detection VR input, through inside calculation processing for different input voltage correspond different duty cycles, adjust the NMOS pipe with this, guarantee to output stable accurate back level voltage and come direct supply rear end load end.
When the system detects that the input voltage is larger than or equal to 12V, the system starts to work, the DSP enables different input voltages to correspond to different NMOS duty ratios through sampling voltage values and internal calculation, and the specific calculation formula is as follows: vout is Vin x D
For example: when the input voltage is detected to be 24V and the output voltage is detected to be 2.4V, the duty ratio D is Vout/Vin is 2.4/24 is 0.1, that is, the on-off time proportion of the NMOS transistor in one period is 10%, and the calculation methods of other input voltages are consistent.
The power conversion module of this embodiment includes vary voltage inductance and a plurality of branch road that steps up, and this embodiment adopts 3 branch roads that step up, and the circuit structure of three branch roads that step up is the same. Taking one of the boosting branches as an example, the boosting branch comprises a boosting inductor L2, a boosting diode D2, a boosting capacitor C2 and a boosting MOS transistor Q2; the boosting inductor L2 is opposite to the transformation inductor L; one end of the boosting inductor L2 is connected with the input end of the boosting diode D2, and the other end of the boosting inductor is grounded; the output end of the boosting diode D2 is connected with the D pole of a boosting MOS tube Q2; the s pole of the boosting MOS tube Q2 is connected with the mainboard; the G pole of the boosting MOS tube Q2 is connected with the controller DSP; the output terminal of the boost diode D2 is connected to ground through a boost capacitor C2. The boosting inductors of the plurality of boosting branches have different numbers of turns, so that the output voltage values are different, and the output voltages of the three boosting branches are 24V, 36V and 48V respectively.
Example 3
The embodiment provides a server power supply method, which comprises the following steps:
and S1, collecting the load power of the voltage reduction branch and calculating the total load power.
And the DSP acquires the voltage value and the current value of each voltage reduction branch to obtain the load power of the branch, and the sum of all the load powers is calculated to be the total load power.
And S2, calculating the input voltage according to the total load power and the main board current limit value.
The applicable current (determined by the motherboard) of the motherboard of the server PCB is obtained, e.g. 50A. The input voltage value is the total load power divided by the applicable current. Since the load of the server may vary, the input voltage may also vary, and therefore, the current input voltage of the server needs to be collected in real time.
And S3, matching the booster circuit according to the input voltage value and enabling the matched booster circuit.
The boosting range of each boosting branch is set according to the boosting output value of the boosting branch, for example, the boosting range of the boosting branch 1 is 12V-24V, the boosting range of the boosting branch 2 is 24V-36V, and the boosting range of the boosting branch 3 is 36V-48V in this embodiment. Storing the mapping relation between the equipment code of the MOS tube of the boosting branch circuit and the boosting range of the boosting branch circuit in the DSP
Assuming that the input voltage value is 30V, the boosting branch 2 is selected, and the controller DSP controls the MOS transistors of the boosting branch 2 to flow (the MOS transistors of the other two boosting branches are kept in a disconnected state) by using the mapping relationship.
And S4, calculating the target duty ratio of the voltage reduction according to the input voltage and the rated voltage of the load on the voltage reduction branch.
And establishing a mapping relation between the MOS tube equipment number and the load equipment code under the same voltage reduction branch, and recording the rated voltage corresponding to the load equipment code.
And the quotient of the load rated voltage value and the current input voltage value is the load duty ratio, and the load duty ratio is marked as the load equipment code to which the load equipment belongs.
And S5, controlling the voltage reduction circuit MOS tube to adjust the duty ratio of the branch circuit to the target duty ratio, and further reducing the input voltage to the load rated voltage.
And controlling the corresponding MOS tube to set the power supply duty ratio as the load duty ratio according to the mapping relation between the MOS tube equipment number and the load equipment code marked by the load duty ratio.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A server power supply, comprising:
the voltage conversion module is connected in series between the PSU power supply and the mainboard and used for boosting the output voltage of the PSU power supply; the main board is connected with a plurality of voltage reduction branches, and a voltage reduction circuit is arranged on each real-time voltage reduction branch; the output end of the voltage reduction branch is connected with a load;
the input end of the controller is respectively connected with the output end of the main board and the output end of the voltage reduction branch; and the output end of the controller is respectively connected with the voltage conversion module and the voltage reduction circuit.
2. The power supply of claim 1, wherein the voltage-reduction circuit comprises:
the D pole of the MOS tube is connected with the output end of the main board, and the s pole of the MOS tube is connected with the inductor; the inductor is connected with a load end; the output end of the diode is connected with a line between the s pole of the MOS tube and the inductor, and the input end of the diode is grounded; and the G pole of the MOS tube is connected with the output end of the controller.
3. The power supply of claim 2, wherein the MOS transistor is an NMOS transistor; the controller adopts a DSP controller.
4. The power supply according to claim 1, wherein the voltage conversion module comprises a transformation inductor and a plurality of boosting branches, and the boosting branches comprise a boosting inductor, a boosting diode, a boosting capacitor and a boosting MOS (metal oxide semiconductor) tube; the boosting inductor is opposite to the transformation inductor; one end of the boosting inductor is connected with the input end of the boosting diode, and the other end of the boosting inductor is grounded; the output end of the boost diode is connected with the D pole of the boost MOS tube; the s pole of the boosting MOS tube is connected with the main board; the G pole of the boosting MOS tube is connected with the controller; the output end of the boost diode is connected with a ground wire through a boost capacitor; the boosting inductance loops of the plurality of boosting branches are different.
5. The power supply of claim 4, wherein a switch is disposed on a loop connecting the transforming inductor of the voltage converting module and the PSU; and the voltage conversion module comprises three boosting branches, and the output voltages of the three boosting branches are respectively 24V, 36V and 48V.
6. A server power supply method, the method comprising:
collecting load power of a voltage reduction branch and calculating total load power;
calculating input voltage according to the total load power and the current limit value of the main board;
matching a boost circuit according to an input voltage value and enabling the matched boost circuit;
calculating a voltage reduction target duty ratio according to the input voltage and the rated voltage of the load on the voltage reduction branch circuit;
and controlling the MOS tube of the voltage reduction circuit to adjust the duty ratio of the branch circuit to the target duty ratio, and further reducing the input voltage to the rated load voltage.
7. The method of claim 6, wherein calculating the buck target duty cycle from the input voltage and a nominal voltage of the load on the buck branch comprises:
and taking the quotient of the load rated voltage value and the input voltage as a target duty ratio.
8. The method of claim 6, wherein the adjusting the duty cycle of the power supply to the load duty cycle by the voltage reduction circuit comprises:
and controlling the on-off time proportion of the MOS tube in a power supply frequency period by using the DSP according to the load duty ratio.
9. The method of claim 6, further comprising:
setting the boosting range of each boosting branch circuit according to the boosting output value of the boosting branch circuit;
establishing a mapping relation between the equipment code of the MOS pipe of the boosting branch and the boosting range of the boosting branch;
and establishing a mapping relation between the MOS tube equipment number and the load equipment code under the same voltage reduction branch, and recording the rated voltage corresponding to the load equipment code.
10. The method of claim 8, wherein the matching boost circuits and enabling the matching boost circuits according to the input voltage value comprises:
acquiring a boosting range to which the input voltage value belongs;
acquiring a corresponding boosting branch MOS tube equipment code according to the belonging boosting range;
and controlling the corresponding boosting branch MOS tube communication according to the corresponding boosting branch MOS tube equipment code.
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| CN115981438A (en) * | 2022-12-30 | 2023-04-18 | 中科可控信息产业有限公司 | Server power supply device and method |
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| CN206977312U (en) * | 2017-07-11 | 2018-02-06 | 北京泰瑞博创科技有限公司 | A kind of power circuit for low-impedance load |
| CN207150424U (en) * | 2017-07-31 | 2018-03-27 | 珠海市魅族科技有限公司 | A kind of power management chip, electric power system and electronic equipment |
| CN108681386A (en) * | 2018-04-03 | 2018-10-19 | 郑州云海信息技术有限公司 | A kind of server redundancy method of supplying power to and its for electric installation |
| CN208353193U (en) * | 2018-04-11 | 2019-01-08 | 四川升华电源科技有限公司 | Digital Control potential device and power supply module |
| CN109992082A (en) * | 2019-04-10 | 2019-07-09 | 苏州浪潮智能科技有限公司 | A kind of server method of supplying power to and device |
| CN110601531A (en) * | 2019-10-31 | 2019-12-20 | 广东美的制冷设备有限公司 | Power supply control circuit and vehicle-mounted air conditioner |
| CN210780550U (en) * | 2019-11-26 | 2020-06-16 | 深圳飞安瑞科技股份有限公司 | Boosting circuit of CPU direct drive MOS tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113448419A (en) * | 2021-05-22 | 2021-09-28 | 山东英信计算机技术有限公司 | System for prolonging power failure of server and server |
| CN115981438A (en) * | 2022-12-30 | 2023-04-18 | 中科可控信息产业有限公司 | Server power supply device and method |
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