CN115981438B - Server power supply device and method - Google Patents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The application relates to a server power supply device and a method. The device comprises: the power supply system comprises a main board and a power receiving board card, wherein a plurality of power supply branches connected with an external power supply and a switch control circuit are arranged on the main board, each power supply branch comprises a switch unit and a first power connector which are connected with each other, and the switch control circuit is connected with each switch unit and used for controlling the on-off of each switch unit; the power receiving board card is provided with a plurality of second power connectors which are in one-to-one correspondence with the power supply branches, and the power receiving board card is connected with the corresponding power supply branches through the second power connectors. In this way, when the current is larger, a plurality of power supply branches can be selected for current transmission, and when the current is smaller, a single power supply branch can be selected for current transmission, so that the power supply mode is more flexible.
Description
Technical Field
The present application relates to the field of server power technologies, and in particular, to a server power supply device and method.
Background
With the high-speed development of the internet of things, the performance requirements of users on the server are higher and higher, the server configuration is continuously improved, the power consumption required by hardware devices such as a CPU (central processing unit), a memory, a hard disk group, a network and the like on the server is increased, and the power supply requirements on the server power supply are also improved.
At present, a standard dual-path rack-mounted server mainly comprises a series of board cards such as a main board and a fan board, a whole machine power supply is powered by a power supply module (PSU) at the main board end, and then the board cards such as the fan board are powered by a 12V power connector on the main board, but as the configuration of the server is improved, the power consumption of the whole machine is increased, the power supply current between the main board and the fan board is also increased, and the current which can be passed by a single 12V power connector is limited by specifications and cannot meet the requirement of current transmission.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a server power supply device and method with a more flexible power supply method.
In a first aspect, the present application provides a server power supply apparatus. The device comprises:
The main board is provided with a plurality of power supply branches and a switch control circuit, each power supply branch is connected with an external power supply, each power supply branch comprises a switch unit and a first power connector which are mutually connected, and the switch control circuit is connected with each switch unit and used for controlling the on-off of each switch unit; the power receiving board card is provided with a plurality of second power connectors which are in one-to-one correspondence with the power supply branches, and each second power connector is connected with the corresponding power supply branch.
In one embodiment, the power supply branch further comprises a precision resistor, one end of the precision resistor is connected with the switch unit, and the other end of the precision resistor is connected with the first power connector.
In the above embodiment, the precise resistors with different resistance values are selected by different power supply branches, so that the first power connector on each power supply branch works in the corresponding rated current value, thereby avoiding the damage of the power connectors.
In one embodiment, the plurality of power supply branches is divided into at least one branch group, each branch group including at least one power supply branch; the resistance of the precision resistor in each power supply branch is determined according to the rated current of the first power connector in each power supply branch and the impedance of each power supply branch in the branch group where each power supply branch is located.
In the above embodiment, by dividing the plurality of branch groups, the appropriate branch group is selected according to the power consumption of the load to perform the current transmission between the motherboard and the power receiving board card, so that the current transmission when the load current is larger can be satisfied, and meanwhile, the power connectors in the plurality of power supply branches are used for performing the current transmission, so that the situation that a large-size power connector cannot be placed on the motherboard due to larger size is avoided.
In one embodiment, the switch control circuit comprises a control unit and a plurality of excitation units corresponding to the switch units one by one, wherein one end of each excitation unit is connected with the control unit, and the other end of each excitation unit is connected with the corresponding switch unit; the control unit is used for controlling the on-off of each switch unit by controlling the voltage output by each excitation unit.
In the embodiment, the switch tube can meet the requirements of isolation and current distribution of the power connector, and the on-off of the switch unit is controlled through the control unit and the excitation unit, so that the on-off of the power supply branch circuit is controlled.
In one embodiment, the switch unit is a MOS tube, and the excitation unit is connected with the grid electrode of the MOS tube.
In the embodiment, the switch tube can meet the requirements of isolation and current distribution of the power connector, and the on-off of the switch unit is controlled through the control unit and the excitation unit, so that the on-off of the power supply branch circuit is controlled.
In one embodiment, the control unit is specifically configured to receive a configuration instruction, determine a target branch group to be turned on according to the configuration instruction, and control the switch units of the power supply branches in the target branch group to be turned on by controlling the voltage output by each excitation unit, where the target branch group is a combination of one or more power supply branches for supplying power to the power receiving board card by the main board.
In one embodiment, the control unit is a complex programmable logic device.
In the above embodiment, the control unit may select different power supply branches through configuration instructions, so that the power supply mode is more flexible.
In one embodiment, the second power connector and the first power connector on the power supply branch to which the second power connector is correspondingly connected are identical in specification.
In one embodiment, the powered board card includes a fan board and an IO board.
In a second aspect, the present application further provides a server power supply method, which is used in the server power supply device in any one of the first aspect, and the method includes: receiving a configuration instruction; determining a target branch group to be conducted in at least one branch group included in the server power supply device according to the configuration instruction, wherein the branch group includes at least one power supply branch; and controlling the switch units in the target branch group to be conducted so as to supply power to the power receiving board card in the server power supply device through the power supply branch in the target branch group.
The server power supply device and the method comprise a main board and a power receiving board card, wherein a plurality of power supply branches connected with an external power supply and a switch control circuit are arranged on the main board, each power supply branch comprises a switch unit and a first power supply connector which are connected with each other, and the switch control circuit is connected with each switch unit and used for controlling the on-off of each switch unit; the power receiving board card is provided with a plurality of second power connectors which are in one-to-one correspondence with the power supply branches, and the power receiving board card is connected with the corresponding power supply branches through the second power connectors. Through the mode, the power supply can transmit current through the first power connectors on the main board and the second power connectors on the power receiving board, the switch control circuit controls the conduction of the switch units on each power supply branch according to the current on the power receiving board, so that the power supply branch for current transmission is controlled, when the current is larger, the power supply branches can be selected for current transmission, when the current is smaller, the single power supply branch can be selected for current transmission, and the power supply mode is more flexible.
Drawings
FIG. 1 is a schematic diagram of a server power supply device according to an embodiment;
FIG. 2 is a schematic diagram of a power supply branch of a server power supply device according to an embodiment;
FIG. 3 is a schematic diagram of a switch control circuit of a server power supply device according to an embodiment;
FIG. 4 is a schematic diagram of a server power supply device according to another embodiment;
FIG. 5 is a schematic diagram of an excitation unit of a server power supply device according to another embodiment;
FIG. 6 is a flowchart of a server power method according to another embodiment;
fig. 7 is a schematic structural diagram of a server power supply device in another embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In the present disclosure, the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless explicitly defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
At present, a standard dual-path rack-mounted server mainly comprises a series of board cards such as a main board and a fan board, a whole machine power supply is powered by a power supply module (PSU) at the main board end, and then the board cards such as the fan board are powered by a 12V power connector on the main board, but as the configuration of the server is improved, the power consumption of the whole machine is increased, the power supply current between the main board and the fan board is also increased, and the current which can be passed by a single 12V power connector is limited by specifications and cannot meet the requirement of current transmission.
If the current specification of a single 12V power connector is increased, the size of the power connector becomes larger, and the power connector with an oversized single size is not placed on the main board because CPU, DIMM, PCIE connectors, power modules and the like are densely distributed on the main board of the server, and the residual available space on the main board is limited, so that the transmission of large current between the boards cannot be satisfied.
In view of this, the power supply of the server power supply device provided by the application can be transmitted through a plurality of first power connectors on the main board and a plurality of second power connectors on the power receiving board, and the switch control circuit controls the conduction of the switch units on each power supply branch according to the current on the power receiving board, so as to control the power supply branch for current transmission, so that when the current is larger, a plurality of power supply branches can be selected for current transmission, and when the current is smaller, a single power supply branch can be selected for current transmission, and the power supply mode is more flexible. Meanwhile, as the plurality of first power connectors can be placed at different positions on the main board, the problem that a single large-size power connector cannot be placed due to overlarge size can be avoided.
In one embodiment, fig. 1 is a schematic structural diagram of a server power supply device according to an embodiment of the present application. As shown in fig. 1, the server power supply device includes a main board 12, on which a plurality of power supply branches 121 and a switch control circuit 122 are disposed, each power supply branch 121 is connected to an external power source 11, each power supply branch 121 includes a switch unit 1211 and a first power connector 1212 that are connected to each other, and the switch control circuit 122 is connected to each switch unit 1211 and is used for controlling on/off of each switch unit 1211.
The power receiving board 13, the power receiving board 13 is provided with a plurality of second power connectors 131 corresponding to the power supply branches 121 one by one, and each second power connector 131 is connected with the corresponding power supply branch 121.
The power supply of the whole server is powered by an external power supply 11, the power supply 11 may output 12V voltage to the server motherboard 12, and the power supply 11 may be a PSU (power supply module). The main board 12 includes a plurality of power supply branches 121, one end of each power supply branch 121 is connected to the power supply 11, each power supply branch 121 includes a switching unit 1211 and a first power connector 1212, the first power connector 1212 obtains current by being connected to the power supply 11, and the main board 12 performs current transmission with the power receiving board card 13 through the first power connector 1212.
The number of power supply branches 121 for supplying power to the power receiving board 13 by the motherboard 12 may be set according to the load power consumption of the power receiving board 13, for example, when the load power consumption of the power receiving board 13 is smaller than the rated current of the first power connector 1212 on one power supply branch 121, one power supply branch 121 may be selected to supply power to the power receiving board 13. If the load power consumption of the power receiving board 13 is larger, the rated current of the first power connector 1212 on one power supply branch 121 cannot meet the current required by the power receiving board 13, and multiple power supply branches 121 can be selected to supply power to the power receiving board 13 at the same time, so as to meet the current requirement of the power receiving board 13.
The switch unit 1211 is configured to control whether the power supply branch 121 is turned on, and when the power supply branch is turned on, the motherboard 12 may supply power to the power receiving board 13 through the power supply branch 121, and when the power supply branch is not turned on, the power supply branch 121 cannot supply power, i.e. does not perform current transmission.
Alternatively, the switching unit 1211 may employ a switching tube to control the on or off of the power supply branch 121. Alternatively, the switch unit 1211 may be a MOS transistor, a diode, a transistor, a relay, or a mechanical switch, where the MOS transistor may be a PMOS transistor or an NMOS transistor. By controlling the switching of the switching unit 1211, the on or off of the respective power supply branches 121 is controlled.
Each switch unit 1211 is connected to the switch control circuit 122, and the switch control circuit 122 controls the on-off of each switch unit 1211, and optionally, the switch control circuit 122 may use an FPGA (Field Programmable GATE ARRAY, a programmable logic array), a CPLD (Complex Programmable Logic Device, a complex programmable logic device), or a single-chip microcomputer, and controls the on-off of each switch unit 1211 through programming.
The switch control circuit 122 may be one, that is, one switch control circuit outputs multiple control signals, and controls the on/off of one switch unit 1211 through each control signal. The switch control circuit 122 may also be a plurality of independent control circuits, and each switch control circuit 122 controls the on-off of one switch unit 1211 through an output. Optionally, the switch control circuit 122 may be further connected to other control end CPUs, so as to receive a configuration instruction sent by the control end CPU, and determine an output of the switch control circuit 122 according to the configuration instruction of the CPU, so as to control on-off of the switch unit 1211, that is, control on-off of the power supply branch 121. For example, the user may send information to the control terminal CPU according to the current requirement of the power board, where the CPU determines the power supply branch circuit to be turned on according to the current requirement of the power board and the specification of the first power connector of each power supply branch circuit, and then outputs a corresponding configuration instruction to the switch control circuit 122, and the switch control circuit controls the switch unit on the power supply branch circuit to be turned on, so as to realize power supply to the power board according to the actual current requirement of the power board.
The power receiving board 13 may be various boards such as a fan board or an IO board, and the first power connector 1212 on the motherboard 12 and the second power connector 131 on the power receiving board 13 are connected in a one-to-one correspondence, and optionally, the second power connector 131 on the same power supply branch 121 and the first power connector 1212 have the same specification, and the power supply 11 supplies power to the power receiving board through the first power connector 1212 on the motherboard and the second power connector 131 on the power receiving board.
The power board 13 may be one or more power boards, and the load power consumption of different power boards is different, for example, when the power board needs to support 6 system cooling fans, 2 GPUs (Graphics Processing Unit, graphics processor) cards, and 16 HDDs (HARD DISK DRIVE, hard disk drives), the total required current is about 120A. The first power connector and the second power connector mainly play a role in transmitting current, allowing the current to pass through the first power connector and the second power connector and then transmit the current to the power receiving board card, play a crucial role in a tie between the power source and the main board and the power receiving board card, but in the current transmission process, the current cannot exceed the rated specification of the first power connector and the second power connector, namely rated current, and if the current exceeds the rated specification, the power connector can be damaged.
The embodiment comprises a main board and a power receiving board card, wherein a plurality of power supply branches connected with an external power supply and a switch control circuit are arranged on the main board, each power supply branch comprises a switch unit and a first power connector which are connected with each other, and the switch control circuit is connected with each switch unit and used for controlling the on-off of each switch unit; the power receiving board card is provided with a plurality of second power connectors which are in one-to-one correspondence with the power supply branches, and the power receiving board card is connected with the corresponding power supply branches through the second power connectors. Through the mode, the power supply can transmit current through the first power connectors on the main board and the second power connectors on the power receiving board, the switch control circuit controls the conduction of the switch units on each power supply branch according to the current on the power receiving board, so that the power supply branch for current transmission is controlled, when the current is larger, the power supply branches can be selected for current transmission, when the current is smaller, the single power supply branch can be selected for current transmission, and the power supply mode is more flexible.
Further, when the current of the power receiving board card is larger, the main board supplies power to the power receiving board card through a plurality of first power connectors instead of supplying power to the first power connector with larger specification, so that the situation that no space is arranged on the main board due to the fact that the first power connector with larger specification is too large is avoided.
In an embodiment of the present application, as shown in fig. 2, the power supply branch 121 further includes a precision resistor 1213, where the precision resistor 1213 may be a high-power resistor, one end of the precision resistor 1213 is connected to the switch unit 1211, and the other end of the precision resistor 1213 is connected to the first power connector 1212. The precision resistor 1213 may be a resistor of high precision, low temperature drift, and high reliability.
When the mainboard supplies power to the power receiving board card through a plurality of power supply branches, as the lengths of the power copper laying channels on the PCB are different, the impedance of each power supply branch is different, if the current is not subjected to isolation distribution, the current flowing through the first power connector is possibly different due to the different impedances, and the current on the other power supply branches possibly exceeds the rated current of the first power connector, so that the first power connector can be damaged, therefore, when two or more power connectors are required to supply power, high-power precise resistors are added in each path, and reasonable distribution of the current is realized by selecting the resistance value of the proper precise resistor.
The plurality of power supply branches 121 are divided into at least one branch group, each branch group including at least one power supply branch 121; the resistance of the precision resistor 1213 in each power supply branch 121 is determined according to the rated current of the first power connector 1212 in each power supply branch 121 and the impedance of each power supply branch 121 in the branch group in which each power supply branch 121 is located.
Optionally, the second power connector 13 and the second power connector 131 are identical in specification with respect to the first power connector 1212 on the power supply branch to which they are correspondingly connected.
Alternatively, the plurality of power supply branches 121 may be divided into at least one branch group according to the power consumption of the power receiving board 13, and each branch group includes at least one power supply branch 121. The main board 12 carries out current transmission through one branch group and the power receiving board card 13, and the power receiving board card 13 has different configurations and corresponds to different branch groups. For example, a typical 2×10PIN, the current-withstanding capability of the first power connector of the wire gauge 16AWG is about 80A, when the configuration of the server is low, if the power consumption on the power board 13 is low, if the load current is less than 80A, then one first power connector can meet the current transmission requirement, that is, only one power supply branch is needed in the branch group. If the total required current is about 120A when the power consumption on the fan board is high, for example, 6 system cooling fans, 2 GPUs (Graphics Processing Unit, graphics processor) cards, and 16 HDDs (HARD DISK DRIVE, hard disk drives) are required, the current required by the fan board exceeds the size of the first power connector in one power supply branch, so that one power supply branch needs to be added, that is, two power supply branches form a branch group for current transmission between the main board and the fan board, it will be understood that multiple power supply branches may be included in one branch group if the load current is greater.
Meanwhile, when the branch circuit group comprises a plurality of power supply branches, namely, the plurality of power supply branches supply power simultaneously, reasonable distribution of currents in the power supply branches needs to be considered, and the power connector is prevented from being damaged due to the fact that the currents passing through the power connector are larger than the specification of the power connector. For example, referring to fig. 7, the power supply of the whole server is performed by the power supply 11 on the left side of the motherboard, and then the power supply branches 1 and 2 perform current transmission, wherein the power supply 11 reaches the first power supply connector one and the second power supply connector two through the copper laying channel, and then the fan board is powered. The specification of the first power connector I is 40A, namely the rated current of the first power connector I is 40A, and the specification of the second power connector II is 80A, namely the rated current of the second power connector II is 80A. Because the lengths of the power copper paving channels on the PCB are different, the impedance of the power supply branch 1 and the impedance of the power supply branch 2 are different, if the current is not reasonably distributed, the current passing through each first power connector can be excessively large, so that the current of one first power connector exceeds the rated current specification of the first power connector, and the first power connector is damaged. Therefore, corresponding measures are needed to solve the problem of reasonable current distribution of the first power connectors, and therefore, when two or more than two power connectors are needed for power supply in an isolated power supply mode, high-power precise resistors are added in each path, and reasonable current distribution is achieved by selecting proper precise resistor values.
In order to avoid that the current passing through the first power connector is larger than the specification of the first power connector, the resistance value of the precision resistor in each power supply branch is determined according to the rated current of the first power connector in each power supply branch and the impedance of each power supply branch in the branch group where each power supply branch is located. Assuming that n power supply branches are included In the branch group, rated current values from the first power supply connectors 1 to n are I1 to In, respectively, and the I1 to In are required to satisfy the relationship of the formula (1). In order to enable the first power connector on each power supply branch to be used within the rated range, each power supply branch needs to select appropriate precision resistors R (1) to R (n), and the precision resistor value needs to satisfy the following formula (2):
I1+I2+I3+…+In＝I (1)
I1×[R(1)+R1]＝I2×[R(2)+R2]＝I3×[R(3)+R3]＝…＝In×[R(n)+Rn] (2)
From the above, it can be obtained:
I is the total current of the fan plate 12V load; R1-Rn are the impedance of each power supply branch, R (1) is taken as a fixed value, and then the precise resistance values R (2) -R (n) which are needed to be connected in series on each other power supply branch can be calculated, so that the first power connector on each power supply branch works just in the rated current value of the first power connector, and the requirement of high-current power supply of the power receiving board card is met.
Since the current flows to the first power connector through the copper laying channel, the impedances R1 to Rn of the power supply branches, that is, the copper laying path impedance of each power supply branch, take one power supply branch as an example, for example, the lengths of the copper laying paths from the power supply to the first power connector are respectively L1, the lengths of the paths from the second power connector to the power receiving board card load are L3, the equivalent cross-sectional area of the copper laying path is S, the resistivity of copper is ρ, and the calculation of the copper laying path impedance R1 from the power supply to the power receiving board card load through the power supply branch is as follows:
In the above embodiment, by dividing the plurality of branch groups, the appropriate branch group is selected according to the power consumption of the load to perform the current transmission between the motherboard and the power receiving board card, so that the current transmission when the load current is larger can be satisfied, and meanwhile, the power connectors in the plurality of power supply branches are used for performing the current transmission, so that the situation that a large-size power connector cannot be placed on the motherboard due to larger size is avoided. The precise resistors with different resistance values are selected by different power supply branches, so that the first power connector on each power supply branch works in the corresponding rated current value, and the damage of the power connector is avoided.
In one embodiment, as shown in fig. 3, the switch control circuit 122 includes a control unit 30 and a plurality of excitation units 31 corresponding to the plurality of switch units one by one, one end of each excitation unit 31 is connected to the control unit 30, and the other end is connected to the corresponding switch unit 1211; the control unit 30 is used to control the on-off of each switch unit 1211 by controlling the voltage output from each excitation unit 31.
The switch unit 1211 is a MOS transistor, and the excitation unit 31 is connected to the gate of the MOS transistor. One excitation unit 31 is correspondingly connected with one switch unit 1211 in one power supply branch 121, and the excitation unit 31 can adopt a boost chip. The switch unit 1211 may be an N-MOSFET with a very small on-resistance, which is substantially negligible, and as shown in fig. 4, the N-MOSFET will be turned on when Vgs > Vgs (th), so that the gate voltage of the N-MOSFET needs to be higher than the source voltage by a certain value to be normally turned on, and the input 12V may be used as a driving voltage to control the switching of the N-MOSFET by outputting 16V to the gate of the N-MOSFET through the boost chip line. As shown in fig. 5, a set of boost circuit diagrams is shown, by selecting a suitable boost chip and a peripheral circuit corresponding to the chip, the control unit 30 controls to switch between high and low levels of EN, the EN end outputs high level, the boost chip normally works and outputs 16v, the N-MOSFET is turned on, the EN end outputs low level, the boost chip is turned off and stops working and does not output, and the N-MOSFET is turned off, i.e. by controlling the on-off of the switch unit of each power supply branch, the on-off of each power supply branch is controlled.
In the embodiment, the switch tube can meet the requirements of isolation and current distribution of the power connector, and the on-off of the switch unit is controlled through the control unit and the excitation unit, so that the on-off of the power supply branch circuit is controlled.
Alternatively, the control unit 30 may be a complex programmable logic device (Complex Programmable Logic Device, CPLD). The control unit 30 is specifically configured to receive a configuration instruction, determine a target branch group to be turned on according to the configuration instruction, and control the switch units of the power supply branches in the target branch group to be turned on by controlling the voltage output by each exciting unit 31, where the target branch group is a combination of one or more power supply branches for supplying power to the power receiving board card by the motherboard.
The CPLD is a digital integrated circuit which has a relatively large scale and a complex structure, belongs to the range of large-scale integrated circuits and can be used for constructing logic functions by users according to respective needs. The configuration instruction is determined according to the load current of the power receiving board card and the specification of the power connector in each power supply branch, the control unit determines a target branch group to be conducted according to the configuration instruction, and meanwhile, the EN end of the boost circuit is controlled to control the switching tube in the switching unit to be conducted, so that the power supply branch is conducted. For example, when the load current of the power receiving board card is smaller than the specification of the power connector in a certain power supply branch, it is determined that power can be supplied only by using the power supply branch, that is, the target branch group is the power supply branch. When the load current of the power receiving board card is larger than the specification of the power connector in a certain power supply branch, determining that a plurality of power supply branches are required to meet the current transmission requirement according to the size of the load current and the specification of the power connector in each power supply branch, determining that a target branch group is required to comprise a plurality of power supply branches, and controlling the switching units of the required power supply branches to be conducted.
In the above embodiment, the control unit may select different power supply branches through configuration instructions, so that the power supply mode is more flexible.
In a second aspect, the present application further provides a server power supply method, which is used in the server power supply device in any one of the first aspect, as shown in fig. 6, and the method includes:
step 601, a configuration instruction is received.
Optionally, the powered board card includes a fan board and an IO board. And determining a configuration instruction according to the load power consumption specification of the power receiving board card. For example, when the load power consumption of the power receiving board card is smaller than the rated current of the single first power connector, the configuration instruction may instruct the main board to select a branch group including one power supply branch to supply power to the power receiving board card, and when the load power consumption of the power receiving board card is larger than the rated current of the single first power connector, the configuration instruction may instruct the main board to select a branch group including 2 or more power supply branches to supply power to the power receiving board card.
Step 602, determining a target branch group to be conducted in at least one branch group included in the server power supply device according to the configuration instruction, wherein the branch group includes at least one power supply branch.
The branch circuit group is a combination formed by one or more power supply branches, and the target branch circuit group is a determined branch circuit group for supplying power to the power receiving board card by the main board. And selecting a proper target branch group according to the configuration instruction, wherein a power supply branch in the target branch group is conducted, and the main board supplies power to the power receiving board card through the conducted power supply branch.
And step 603, controlling the switch unit in the target branch group to be turned on so as to supply power to the power receiving board card in the server power supply device through the power supply branch in the target branch group.
The control unit controls the switch unit in the target branch group to be conducted, the switch unit can be conducted through the MOS tube, the switch unit is conducted, the power supply branch where the switch unit is located is conducted, and the main board supplies power to the power receiving board card through the conducted power supply branch.
In the above embodiment, the target branch group is determined according to the configuration instruction, and then the switch unit of the power supply branch in the target branch group is controlled to be turned on, and the main board can supply power to the power receiving board card through the power supply branch in the target branch group, so that when the current is larger, a plurality of power supply branches can be selected for current transmission, and when the current is smaller, a single power supply branch can be selected for current transmission, and the power supply mode is more flexible. Meanwhile, as the power supply branches are positioned at different positions on the main board, the problem that the large-specification power connector on the single power supply branch is too large in size and cannot be placed can be avoided.
In order to facilitate the reader to understand the server power supply device and method of the present application, the application of the server power supply device and method of the present application is illustrated below, as shown in fig. 7, where a power receiving board is used as a fan board, two power supply branches are provided on the motherboard, and assuming that the server performs power supply output 12V through the lower left power supply, the power flows to the first power supply connector through the N-mosfet_1 and the precision resistor_1 on the power supply branch 1, flows to the first power supply connector through the N-mosfet_2 and the precision resistor_2 on the power supply branch 2, and then the first power supply connector is connected with the second power supply connector three, and the first power supply connector two and the second power supply connector four are connected with each other to supply power to the fan board, where the specifications of the first power supply connector one and the second power supply connector three are completely consistent, and the specifications of the first power supply connector two and the second power supply connector four are completely consistent.
The rated current of the first power connector is 40A, the rated current of the second power connector is 80A, and when the fan board is in a low configuration, the load current of the fan board is less than 80A, and the second power connector is 80A, so that power can be supplied to the fan board only through the second power connector. Namely, the control unit is controlled, namely the CPLD outputs a high level to enable the boost circuit 2 to work normally, and outputs a low level to enable the boost circuit 1 to be closed and stop working, so that the N-MOSFET_1 is turned off, the N-MOSFET_2 is turned on, and current is transmitted to the load end of the fan board from the first power connector II of the power supply branch circuit 2.
When the load current of the fan board is greater than 80A and is 120A, the fan board needs to be simultaneously powered by two power supply branches, namely two first power supply connectors, at this time, the CPLD outputs high levels to enable both the boost line 1 and the boost line 2 to be in a normal on state, current is commonly transmitted from the first power supply connector 1 of the power supply branch 1 and the first power supply connector second of the power supply branch 2, the lengths of copper laying paths from the power supply to the first power supply connector first and the first power supply connector second are respectively L1 and L2, the lengths of paths from the second power supply connector third and the second power supply connector fourth to the fan board load are respectively L3 and L4, the widths of copper laying paths are uniformly 30mm, the copper foil thickness is 2 ounces, and the resistances of copper laying paths from the power supply to the fan board load through the 12V power supply branch 1 and the 12V power supply branch 2 are calculated as follows:
Assuming that L1 is 0.3m, L2 is 0.2m, l3=l4 is 0.1m, r1=3.24mΩ, r2=2.43mΩ can be obtained from the above formula.
At this time, since the current of the fan plate is 120A, the magnitudes of the currents I1 and I2 passing through the power supply branch 1 and the power supply branch 2 are:
I1+I2＝120A
3.24×I1＝2.43×I2
i1=51.4a, i2=68.6a can be obtained from the above formula. Since the rated current of the first power connector is 40A, and the current passing through the first power connector exceeds 40A, the first power connector is damaged, so in order to ensure that the first power connector and the second power connector both work within the rated current range, the two paths need to select proper precise resistance values R (1) and R (2), and then the total impedance of the path 1 and the path 2 is known as follows:
R1(total)＝R(1)+3.24
R2(total)＝R(2)+2.43
To ensure i1=40a, i2=80a, the formula:
R1(total)×I1＝R2(total)×I2
the resistance value of the precision resistor R (1) is 3.62mΩ when R (1) =2×r (2) +1.62 is obtained.
At this time, the current passing through the two first power connectors can just meet the rated current specification of the first power connectors, and the 12V power supply requirement can be met.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. A server power supply device, characterized in that the server power supply device comprises:
The power supply system comprises a main board, wherein a plurality of power supply branches and a switch control circuit are arranged on the main board, each power supply branch is connected with an external power supply, each power supply branch comprises a switching unit and a first power supply connector which are mutually connected, and the switch control circuit is connected with each switching unit and used for controlling the on-off of each switching unit;
the power receiving board card is provided with a plurality of second power connectors which are in one-to-one correspondence with the power supply branches, and each second power connector is connected with the corresponding power supply branch;
the switch control circuit comprises a control unit and a plurality of excitation units which are in one-to-one correspondence with the switch units, one end of each excitation unit is connected with the control unit, and the other end of each excitation unit is connected with the corresponding switch unit;
the control unit is used for controlling the on-off of each switch unit by controlling the voltage output by each excitation unit;
The control unit is specifically configured to receive a configuration instruction, determine a target branch group to be turned on according to the configuration instruction, and control a switch unit of a power supply branch in the target branch group to be turned on by controlling a voltage output by each excitation unit, where the target branch group is a combination of one or more power supply branches for the main board to supply power to the power receiving board card.
2. The apparatus of claim 1, wherein the power supply branch further comprises a precision resistor, one end of the precision resistor being connected to the switching unit, and the other end of the precision resistor being connected to the first power connector.
3. The apparatus of claim 2, wherein the plurality of power supply branches are divided into at least one branch group, each of the branch groups including at least one of the power supply branches;
And the resistance value of the precision resistor in each power supply branch is determined according to the rated current of the first power connector in each power supply branch and the impedance of each power supply branch in the branch group where each power supply branch is located.
4. The device of claim 1, wherein the switching unit is a MOS transistor, and the excitation unit is connected to a gate of the MOS transistor.
5. The apparatus of claim 1, wherein the control unit is a complex programmable logic device.
6. The apparatus of claim 1, wherein the second power connector and the first power connector on the power branch to which the second power connector is correspondingly connected are of the same gauge.
7. The apparatus of claim 1, wherein the powered board card comprises a fan board and an IO board.
8. The device of claim 1, wherein the excitation unit is a boost chip.
9. The apparatus of claim 4, wherein the switching unit is an N-MOSFET tube.
10. A server power supply method for use in the server power supply apparatus of any one of claims 1 to 9, the method comprising:
receiving a configuration instruction;
determining a target branch group to be conducted in at least one branch group included in the server power supply device according to the configuration instruction, wherein the branch group includes at least one power supply branch;
And controlling the switching unit in the target branch group to be conducted so as to supply power to the power receiving board card in the server power supply device through the power supply branch in the target branch group.
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