阅读说明：本技术 一种应用于高密度gpu的psu以及一种供电系统 (PSU applied to high-density GPU and power supply system ) 是由 滕学军 于 2020-05-28 设计创作，主要内容包括：本申请公开了的一种应用于高密度GPU的PSU,包括：储能模块、功率开关模块、PWM控制模块,用于当监测到高密度GPU的电流需求增加时,则将AC输入电流调整为第一基准电压；或当监测到高密度GPU的电流需求减少时,则将AC输入电流调整为第二基准电压；功率因素校正模块,用于根据第一基准电压或第二基准电压控制储能模块释放能量或吸收能量,以使功率开关模块以预设电压驱动高密度GPU进行工作。该PSU因为可以根据高密度GPU的电流需求对AC输入电流进行调整,并使得功率开关模块能够以预设电压驱动高密度GPU进行工作,由此就避免了高密度GPU在性能状态相互转换时所出现的宕机故障。(The application discloses a PSU who is applied to high density GPU includes: the power supply comprises an energy storage module, a power switch module and a PWM control module, wherein the energy storage module, the power switch module and the PWM control module are used for adjusting AC input current to first reference voltage when the current demand of the high-density GPU is increased; or when the current demand of the high-density GPU is monitored to be reduced, adjusting the AC input current to a second reference voltage; and the power factor correction module is used for controlling the energy storage module to release energy or absorb energy according to the first reference voltage or the second reference voltage so that the power switch module drives the high-density GPU to work at a preset voltage. The PSU can adjust the AC input current according to the current requirement of the high-density GPU, and enables the power switch module to drive the high-density GPU to work with preset voltage, so that the downtime fault caused by the mutual conversion of the performance states of the high-density GPU is avoided.)

1. A PSU for a high-density GPU, comprising:

the energy storage module is used for storing energy or releasing energy;

a power switch module for driving the high-density GPU;

the PWM control module is used for adjusting the AC input current to a first reference voltage when the current demand of the high-density GPU is increased; or when the current demand of the high-density GPU is monitored to be reduced, adjusting the AC input current to a second reference voltage;

and the power factor correction module is used for controlling the energy storage module to release energy or absorb energy according to the first reference voltage or the second reference voltage so that the power switch module drives the high-density GPU to work at a preset voltage.

2. A PSU according to claim 1, characterized in that the first reference voltage is in particular 310V and the second reference voltage is in particular 380V.

3. The PSU of claim 1, further comprising:

and the power protection module is used for limiting the pulse width of the PWM driving signal output by the PWM control module within a preset range.

4. A PSU according to claim 3, wherein the power protection module is in particular a hardware protection module.

5. A PSU according to claim 3, wherein the power protection module is in particular a software protection module.

6. A PSU according to any of claims 1-5, further comprising:

and the current control module is used for detecting whether the first reference voltage or the second reference voltage meets a preset condition, and if not, the current control module adjusts the duty ratio of the PWM driving signal output by the PWM control module by using negative feedback so as to keep the first reference voltage or the second reference voltage constant.

7. The PSU of claim 6, wherein the current control module comprises:

and the watchdog is used for detecting whether the first reference voltage or the second reference voltage meets the preset condition.

8. A power supply system comprising a PSU according to any one of claims 1 to 7 for use in a high-density GPU.

Technical Field

The invention relates to the technical field of servers, in particular to a PSU (power system unit) applied to a high-density GPU (graphics processing unit) and a power supply system.

Background

With the rapid development of artificial intelligence technology, people have higher and higher requirements on the Graphics Processing capability of a rack server in a data center, and therefore, a large number of high-performance GPUs (Graphics Processing units) are integrated in a limited rack server chassis space, that is, a high-density GPU is formed.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating an operation principle of a PSU when powering a high-density GPU in the prior art. In the PSU (Power Supply Unit), an AC input current is converted to 380VDC through a Power factor correction module and an energy storage module, and the 380VDC is converted to high-frequency pulse AC through a Power switching module, wherein the Power switching module is controlled by a PWM control module, the high-frequency pulse AC is converted to low-voltage AC through a primary side transformer and a secondary side transformer, and the low-voltage AC is rectified to 12VDC Supply voltage required by a high-density GPU. When the performance states of the high-density GPUs are converted into each other, instantaneous sudden changes of the current demands of the high-density GPUs occur, at the moment, the power factor correction module always provides 380V voltage for the energy storage module, so that the PSU output voltage for supplying power to the high-density GPUs temporarily falls or overshoots, and the PSU is triggered to perform undervoltage protection or overvoltage protection, and under the condition, breakdown faults of the high-density GPUs can occur. At present, no effective solution exists for the technical problem.

Therefore, how to avoid the downtime fault occurring when the performance states of the high-density GPUs are mutually converted is a technical problem to be solved urgently by the technical staff in the field.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a PSU applied to a high-density GPU and a power supply system, so as to avoid a downtime fault occurring when the performance states of the high-density GPU are mutually converted. The specific scheme is as follows:

a PSU for use with a high-density GPU, comprising:

the energy storage module is used for storing energy or releasing energy;

a power switch module for driving the high-density GPU;

the PWM control module is used for adjusting the AC input current to a first reference voltage when the current demand of the high-density GPU is increased; or when the current demand of the high-density GPU is monitored to be reduced, adjusting the AC input current to a second reference voltage;

and the power factor correction module is used for controlling the energy storage module to release energy or absorb energy according to the first reference voltage or the second reference voltage so that the power switch module drives the high-density GPU to work at a preset voltage. Preferably, the first reference voltage is 310V, and the second reference voltage is 380V.

Preferably, the method further comprises the following steps:

and the power protection module is used for limiting the pulse width of the PWM driving signal output by the PWM control module within a preset range.

Preferably, the power protection module is specifically a hardware protection module.

Preferably, the power protection module is specifically a software protection module.

Preferably, the method further comprises the following steps:

and the current control module is used for detecting whether the first reference voltage or the second reference voltage meets a preset condition, and if not, the current control module adjusts the duty ratio of the PWM driving signal output by the PWM control module by using negative feedback so as to keep the first reference voltage or the second reference voltage constant.

Preferably, the current control module includes:

and the watchdog is used for detecting whether the first reference voltage or the second reference voltage meets the preset condition.

Correspondingly, the invention also discloses a power supply system which comprises the PSU applied to the high-density GPU.

Therefore, in the PSU applied to the high-density GPU, the current demand of the high-density GPU can be monitored in real time by the PWM control module, the AC input current is adjusted according to the current demand of the high-density GPU, and meanwhile, the energy output by the PWM control module is buffered by the released energy or absorbed energy of the energy storage module, so that the power switch module can drive the high-density GPU to work at a preset voltage, the phenomenon that the output voltage of the PSU drops or overshoots temporarily can be avoided, and the breakdown fault of the high-density GPU when the performance states are mutually converted is avoided. Correspondingly, the power supply system provided by the application also has the beneficial effects.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating the operation of a PSU in powering a high-density GPU in the prior art;

FIG. 2 is a block diagram of a PSU applied to a high-density GPU according to an embodiment of the present invention;

fig. 3 is a schematic diagram illustrating an operating principle of a PSU applied to a high-density GPU according to an embodiment of the present invention;

FIG. 4 is a block diagram of another PSU for a high-density GPU according to an embodiment of the present invention;

fig. 5 is a structural diagram of another PSU applied to a high-density GPU according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.

Referring to fig. 2, fig. 2 is a structural diagram of a PSU applied to a high-density GPU according to an embodiment of the present invention, where the PSU includes:

an energy storage module 11 for storing energy or releasing energy;

a power switch module 12 for driving the high-density GPU;

the PWM control module 13 is configured to adjust the AC input current to a first reference voltage when it is monitored that the current demand of the high-density GPU increases; or when the current demand of the high-density GPU is monitored to be reduced, adjusting the AC input current to a second reference voltage;

and the power factor correction module 14 is configured to control the energy storage module 11 to release energy or absorb energy according to the first reference voltage or the second reference voltage, so that the power switch module 12 drives the high-density GPU to operate at a preset voltage.

In this embodiment, a PSU applied to a high-density GPU is provided, and a downtime fault occurring when performance states of the high-density GPU are mutually converted can be avoided by using the PSU. Referring to fig. 2, fig. 2 is a structural diagram of a PSU applied to a high-density GPU according to an embodiment of the present invention. When the PWM control module 13 monitors that the current demand of the high-density GPU increases, the PWM control module 13 adjusts the AC input current to the first reference voltage, or when the PWM control module 13 monitors that the current demand of the high-density GPU decreases, the PWM control module 13 adjusts the AC input current to the second reference voltage.

In the process, when the sudden change of the current of the high-density GPU is large, the PWM control module 13 adjusts the AC input current to the first reference voltage, wherein the current with insufficient sudden change in the moment can freewheel through the released energy of the energy storage module 11, and the part of energy can be superimposed on the power switch module 12, so that the output voltage of the PSU can be maintained within a certain specification, and thus the power switch module 12 can drive the high-density GPU to work with the preset voltage, and thus the PSU provided by the present application does not have the phenomenon that the output voltage drops in the moment.

In addition, since the power voltage required by the PSU in other operation modes is much lower than the transient high power peak demand of the high-density GPU, when the PWM control module 13 monitors that the current demand of the high-density GPU is reduced, the PWM control module 13 adjusts the AC input current to the second reference voltage, and maintains the PSU in the normal operation mode by absorbing energy of the energy storage module 11, so as to avoid overshoot of the output voltage of the PSU. It should be noted that, in this embodiment, the energy storage module 11 is composed of an energy storage capacitor module and a freewheeling inductor module.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating an operating principle of a PSU applied to a high-density GPU according to an embodiment of the present invention. When the current demand of the high-density GPU increases, the PWM control module 13 adjusts the AC input current to the first reference voltage, and transmits the first reference voltage to the power switch module 12 through the energy storage module 11, when the sudden change of the current of the high-density GPU is large, the current with insufficient instantaneous sudden change can extract energy from the energy storage module 11 to be used as compensation energy to carry out follow current on the high-density GPU, when the compensation energy and the first reference voltage are both superposed in the primary side transformer, the PWM control module 13 can increase the duty ratio of the power switch module 12 to output more energy to the secondary side transformer, after rectification, the output voltage can be maintained within an expected output voltage range without generating a drop of the output voltage, thereby completing the transient follow current design required by the jump of the high-density GPU. It can be understood that, since the high-density GPU is out of the transient high-power peak, the power required in other operation modes is much lower than the transient high-power peak demand, when the PWM control module 13 monitors that the current demand of the high-density GPU is reduced, the PWM control module 13 adjusts the AC input current to the second reference voltage, and absorbs energy through the energy storage module 11 to maintain the normal operation of the PSU.

Obviously, with such an arrangement, it is equivalent to be able to adjust the AC input current by using the PWM control module 13 according to the current demand of the high-density GPU, and simultaneously buffer the energy output by the PWM control module 13 by the energy release or absorption of the energy storage module 11, so that the power switch module 12 can drive the high-density GPU to operate at the preset voltage, thereby avoiding the phenomenon of temporary drop or overshoot of the output voltage of the PSU.

It can be seen that, in the PSU applied to the high-density GPU provided in this embodiment, because the current demand of the high-density GPU can be monitored in real time by using the PWM control module, and the AC input current is adjusted according to the current demand of the high-density GPU, and meanwhile, the energy output by the PWM control module is buffered by the released energy or absorbed energy of the energy storage module, so that the power switch module can drive the high-density GPU to operate at a preset voltage, a phenomenon that the output voltage of the PSU temporarily drops or overshoots can be avoided, and thus a downtime fault occurring when the performance states of the high-density GPU are mutually converted can be avoided.

Based on the above embodiments, this embodiment further describes and optimizes the technical solution, and as a preferred implementation, the first reference voltage is specifically 310V, and the second reference voltage is specifically 380V.

Through a great deal of practical operation, when the first reference voltage is set to 310V and the second reference voltage is set to 380V, the temporary drop or overshoot of the PSU output voltage when the high-density GPUs are switched between performance states can be avoided, and the waste amount of energy resources can be relatively reduced. Therefore, in the present embodiment, the first reference voltage is set to 310V, and the second base station voltage is set to 380V, so as to improve the conversion rate of energy resources.

Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 4, where fig. 4 is a structural diagram of another PSU applied to a high-density GPU according to the embodiment of the present invention. As a preferred embodiment, the PSU applied to a high-density GPU further includes:

and the power protection module 15 is configured to limit the pulse width of the PWM driving signal output by the PWM control module 13 within a preset range.

It is understood that when the required current of the high-density GPU exceeds the limit design specification of the PSU, the transient peak current of the high-density GPU may easily exceed the compensation overlap, which may not only damage the switching power module in the PSU, but also damage the high-density GPU. Therefore, in this embodiment, in order to avoid the above situation, a power protection module 15 is further disposed in the PSU applied to the high-density GPU, wherein the power protection module 15 is used to limit the pulse width of the PWM driving signal output by the PWM control module 13 within a preset range, so as to avoid the PWM control module 13 from being damaged due to overcurrent.

As shown in fig. 4, the energy provided by the power factor correction module 14 is transmitted to the power switch module 12 through the PWM control module 13, and then transmitted to the high-density GPU after passing through the primary-side transformer, the secondary-side transformer and the low-voltage rectification, when the high-density GPU suddenly changes, the PWM control module 13 limits the pulse width of the PWM driving signal output by the PWM control module 13 through the power protection module 15, and limits the pulse width of the PWM driving signal output by the PWM control module 13 within a preset range, thereby achieving the purpose of protecting the PSU.

As a preferred embodiment, the power protection module 15 is embodied as a hardware protection module.

Specifically, the power protection module 15 may be configured as a hardware protection module, that is, a circuit module is used to limit the pulse width of the PWM driving signal output by the PWM control module 13 within a preset range. It should be noted that, because the structural form of the circuit module for implementing the function is various, and the circuit module for implementing the function is well known by those skilled in the art, the structural form of the hardware protection module is not described in detail in this embodiment.

Therefore, by the technical scheme provided by the embodiment, the universality of the power protection module 15 in the building process can be relatively ensured.

As a preferred embodiment, the power protection module 15 is embodied as a software protection module.

Alternatively, in practical applications, the power protection module 15 may be set as a software protection module, that is, a preset control program is used to limit the pulse width of the PWM driving signal output by the PWM control module 13 within a preset range. Obviously, by such an arrangement, not only can the space occupation of the power protection module 15 on the PSU be relatively reduced, but also the arrangement of the power protection module 15 can be more flexible and diverse.

Based on the above embodiments, the present embodiment further describes and optimizes the technical solution, please refer to fig. 5, and fig. 5 is a structural diagram of another PSU applied to a high-density GPU according to the embodiment of the present invention. As a preferred embodiment, the PSU applied to a high-density GPU further includes:

and a current control module 16, configured to detect whether the first reference voltage or the second reference voltage meets a preset condition, and if not, adjust a duty ratio of the PWM driving signal output by the PWM control module 13 by using negative feedback, so that the first reference voltage or the second reference voltage is kept constant.

In practical applications, the voltage received by the high-density GPU from the PSU is substantially a constant 12Vdc voltage, but with the transient sudden change of the high-density GPU current, the output voltage of the PSU temporarily drops or overshoots, and once the output voltage of the PSU temporarily drops or overshoots, the PSU triggers a "false protection" action, so that the high-density GPU is down. In addition, in the prior art, the output voltage of the PSU is compared with the reference voltage through the negative feedback of the sampling, and then the output voltage can be adjusted through the internal adjustment mechanism of the PSU, which results in a longer voltage recovery time of the PSU.

Therefore, in the present embodiment, a current control module 16 is disposed in the PSU, wherein the current control module 16 is configured to detect whether the first reference voltage or the second reference voltage satisfies a preset condition, and if the current control module 16 detects that the first reference voltage or the second reference voltage does not satisfy the preset condition, the duty ratio of the PWM driving signal output by the PWM control module 13 is adjusted by using negative feedback, so that the first reference voltage or the second reference voltage is kept constant. It is conceivable that the power factor correction module 14, the current control module 16, the PWM control module 13, and the power switch module 12 constitute a closed feedback loop, so that the output voltage of the PSU can be maintained in a constant range through the closed feedback loop, and the recovery time required for the output voltage of the PSU can be relatively shortened.

Specifically, in the closed-loop feedback loop, the current control module 16 may monitor a current sudden change condition of the power factor correction module 14 in real time, predict a transient current of the power factor correction module 14, compare the transient current of the power factor correction module 14 with various current waveform data imported and stored in advance, and determine whether the first reference voltage or the second reference voltage output by the PWM control module 13 satisfies a preset condition, and if the preset condition is not satisfied, the current control module 16 may control the duty ratio of the PWM driving signal output by the PWM control module 13 based on the predicted transient current. For example, the output voltage of the PSU is increased by increasing the duty ratio of the PWM control module 13 outputting the PWM driving signal, the output voltage of the PSU is decreased by decreasing the duty ratio of the PWM control module 13 outputting the PWM driving signal, and the first reference voltage or the second reference voltage is controlled to be constant by such an arrangement.

As a preferred embodiment, the current control module 16 includes:

and the watchdog is used for detecting whether the first reference voltage or the second reference voltage meets a preset condition.

In the present embodiment, a watchdog is provided in the current control module 16, and the watchdog is used to detect whether the first reference voltage or the second reference voltage satisfies a preset condition. Specifically, in the actual operation process, whether the first reference voltage or the second reference voltage can keep a preset voltage range within a preset time is detected through a time counter in the watchdog, so as to detect whether the first reference voltage or the second reference voltage meets a preset condition.

In addition, the watchdog also has the advantages of low design cost and stable and reliable working performance, so that when the watchdog is used for detecting whether the first reference voltage or the second reference voltage meets the preset condition, the stability and reliability of the current control module 16 in the working process can be relatively improved.

Correspondingly, the embodiment of the invention also discloses a power supply system, which comprises the PSU applied to the high-density GPU.

The power supply system provided by the embodiment of the invention has the beneficial effects of the PSU applied to the high-density GPU.

The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The PSU applied to the high-density GPU and the power supply system provided by the present invention are described in detail above, and specific examples are applied herein to illustrate the principles and embodiments of the present invention, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.