CN116131607A - Control method, system, equipment and storage medium of multi-phase voltage regulator - Google Patents
Control method, system, equipment and storage medium of multi-phase voltage regulator Download PDFInfo
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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
- H02M3/156—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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—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 with automatic control of output voltage or current, e.g. switching regulators with digital control
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Abstract
The application discloses a control method, a system, equipment and a storage medium of a multiphase voltage regulator, which are applied to the technical field of power supply control and comprise the steps of determining the current Phase branch starting quantity K according to current load information, and carrying out driving control of corresponding K Phase branches through PWM driving signals 1 to K; recording accumulated working time of the multiphase voltage regulator in a light load mode, adjusting mapping information for representing corresponding relations between PWM driving signals 1 to N and N Phase branches according to a preset rule when the accumulated working time is larger than a first time threshold, and resetting the accumulated working time; wherein, the 1 PWM driving signals corresponding to the Phase leg shown in the route mapping information of each Phase leg performs the control of the operation state of the Phase leg. By applying the scheme, the reliability of the multiphase voltage regulator is effectively improved, and the service life of the multiphase voltage regulator is guaranteed.
Description
Technical Field
The present invention relates to the field of power control technologies, and in particular, to a control method, a system, an apparatus, and a storage medium for a multiphase voltage regulator.
Background
VR (Voltage Regulator ) power supplies, generally referred to specifically as multi-phase voltage regulators (Multi Phase Voltage Regulator), have the advantages of reducing input current ripple, reducing output current ripple, improving transient overshoot and undershoot, improving conversion efficiency, and are widely used in server systems to power devices such as CPUs and video cards.
Referring to fig. 1, a circuit structure of an N-Phase VR power supply that is currently more commonly used includes N parallel Phase branches, referred to as N phases, and in fig. 1, the N phases are labeled as 1 st Phase, 2 nd Phase.
The highest conversion efficiency point of each phase of the VR power source is between 10A and 20A, so that in order to improve the overall conversion efficiency, when the load is lighter, only 1 phase or several phases work, and the VR power source is in a light load mode. And only when under heavy load, the N phase is fully opened.
For example, in the example of fig. 1, when the load is light, the digital controller drives the 1 st Phase to operate through PWM1, and at this time, each of the remaining Phase branches is in a non-operating state. After the load increases, for example, the digital controller drives the 1 st Phase operation by PWM1, drives the 2 nd Phase operation by PWM2, and drives the 3 rd Phase operation by PWM3, so that each of the remaining phases is in a non-operation state. When the load is large and the load enters the heavy-load mode, the digital controller drives N phases to work through PWM1 to PWMN respectively.
It can be seen that if the system is operated in the light load mode for a long time, only the 1 st Phase or a few phases are caused to stably operate, and the phases following the other trigger sequences are always in the non-operating state, i.e. in the off state. This can lead to voltage-current stress and temperature imbalance between phases, which in turn can affect the lifetime of the overall VR power supply.
In summary, how to effectively improve the reliability of the multi-phase voltage regulator and ensure the service life thereof is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a control method, a control system, control equipment and a storage medium of a multi-phase voltage regulator, so that the reliability of the multi-phase voltage regulator is effectively improved, and the service life of the multi-phase voltage regulator is ensured.
In order to solve the technical problems, the invention provides the following technical scheme:
a method of controlling a multi-phase voltage regulator, comprising:
determining the current Phase branch starting quantity K according to the current load information, and carrying out driving control of the corresponding K Phase branches based on the current mapping information through PWM driving signals 1 to PWM driving signals K;
recording the accumulated working time of the multiphase voltage regulator in a light load mode;
judging whether the current accumulated working time length is larger than a preset first time length threshold value or not;
if yes, mapping information used for representing the corresponding relation between the PWM driving signals 1 to N and N Phase branches is adjusted according to a preset rule;
resetting the accumulated working time length every time the mapping information is adjusted;
wherein N is a positive integer not less than 2, K is a positive integer and K is not more than N, the multiphase voltage regulator includes N parallel Phase branches, and each Phase branch performs control of the working state of the Phase branch by using 1 PWM driving signal corresponding to the Phase branch shown in the mapping information; when at least 1 Phase branch is in a non-working state, the multi-Phase voltage regulator is in the light load mode.
Preferably, in one switching period, the triggering interval between the PWM driving signal i and the PWM driving signal i+1 is T/K; wherein T represents a switching period, i is a positive integer, and i is more than or equal to 1 and less than or equal to K-1.
Preferably, the determining the current Phase leg enabling number K according to the current load information includes:
and determining the current starting quantity K of the Phase branches according to the current load current.
Preferably, the adjusting, according to a preset rule, mapping information for representing correspondence between PWM driving signals 1 to N and N Phase branches includes:
mapping information representing correspondence between PWM driving signals 1 to N and N Phase branches is adjusted in a random adjustment manner.
Preferably, the mapping information includes a PWM sequence formed by PWM driving signals 1 to N, and items 1 to N in the PWM sequence correspond to 1 st Phase leg to N nd Phase leg in turn;
correspondingly, the adjusting the mapping information for representing the correspondence between the PWM driving signals 1 to N and the N Phase branches according to the preset rule includes:
every time the mapping information is adjusted, the current 1 st item of the PWM sequence is moved to the last 1 st item of the PWM sequence.
Preferably, the method further comprises:
and updating the adjusted mapping information to a preset storage after the mapping information is adjusted, so that the mapping information in the storage is called when the computer is started.
Preferably, the method further comprises:
and when the temperature of any 1 Phase branch is detected to exceed the temperature alarm threshold and the duration reaches the preset second duration threshold, executing the operation of adjusting the mapping information used for representing the corresponding relation between the PWM driving signals 1 to N and the N Phase branches according to the preset rule.
A control system for a multi-phase voltage regulator, comprising:
the drive control execution module is used for determining the current Phase branch starting quantity K according to the current load information, and carrying out drive control of the corresponding K Phase branches based on the current mapping information through PWM driving signals 1 to K;
the accumulated working time length recording module is used for recording the accumulated working time length of the multi-phase voltage regulator in the light load mode;
the judging module is used for judging whether the current accumulated working time length is larger than a preset first time length threshold value or not; if yes, triggering a mapping information adjustment module;
the mapping information adjustment module is used for adjusting mapping information used for representing the corresponding relation between the PWM driving signals 1 to N and N Phase branches according to a preset rule;
the accumulated working time length resetting module is used for resetting the accumulated working time length every time after the mapping information is adjusted;
wherein N is a positive integer not less than 2, K is a positive integer and K is not more than N, the multiphase voltage regulator includes N parallel Phase branches, and each Phase branch performs control of the working state of the Phase branch by using 1 PWM driving signal corresponding to the Phase branch shown in the mapping information; when at least 1 Phase branch is in a non-working state, the multi-Phase voltage regulator is in the light load mode.
A control apparatus of a multi-phase voltage regulator, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the steps of the control method of a multi-phase voltage regulator as described above.
A computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method of controlling a multi-phase voltage regulator as described above.
By applying the technical scheme provided by the embodiment of the invention, the situation that only the 1 st Phase or a few phases stably work and other phases with the back trigger sequences are always in the non-working state can be considered in the traditional scheme, because in the traditional scheme, the corresponding relation between N Phase branches and PWM driving signals 1 to N is fixed, the 1 st Phase is in the working state under any load condition, in other words, the lower the number of the Phase branches is, the easier the Phase branches are in the working state, thus leading to unbalanced voltage and current stress and temperature among the phases and influencing the service life of the whole VR power supply.
In this regard, in the scheme of the present application, the current Phase branch enabling number K may be determined according to the current load information, and driving control of the corresponding K Phase branches may be performed by using the PWM driving signals 1 to K. In addition, the scheme of the application can record the accumulated working time of the multi-Phase voltage regulator in a light load mode, wherein the light load mode refers to that at least 1 Phase branch is in a non-working state. If the current accumulated working time is longer than a preset first time threshold, which indicates that Phase switching can be performed, the mapping information for representing the corresponding relation between the PWM driving signals 1 to N and the N Phase branches is adjusted according to a preset rule, it can be seen that whether a certain 1 Phase branch works is determined by the PWM driving signal corresponding to the Phase branch, and the corresponding relation is reflected in the mapping information.
In summary, the scheme of the application effectively improves the reliability of the multi-phase voltage regulator and ensures the service life of the multi-phase voltage regulator.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a circuit structure of an N-phase VR power source;
FIG. 2 is a flow chart of a control method of a multi-phase voltage regulator according to the present invention;
FIG. 3 is a schematic diagram illustrating the adjustment of mapping information according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a system of a multi-phase voltage regulator according to the present invention;
fig. 5 is a schematic diagram of a device for a multi-phase voltage regulator according to the present invention.
Detailed Description
The core of the invention is to provide a control method of a multi-phase voltage regulator, which effectively improves the reliability of the multi-phase voltage regulator and ensures the service life of the multi-phase voltage regulator.
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 2, fig. 2 is a flowchart illustrating a control method of a multi-phase voltage regulator according to the present invention, the control method of the multi-phase voltage regulator may include the following steps:
step S201: and determining the current Phase branch starting quantity K according to the current load information, and carrying out driving control of the corresponding K Phase branches based on the current mapping information through PWM driving signals 1 to PWM driving signals K.
Specifically, as described above, the multi-Phase voltage regulator of the present application may also be referred to as a VR power source, where the multi-Phase voltage regulator includes N parallel Phase branches, where N is a positive integer not less than 2. The specific circuit structure of each 1 Phase branch can be set and adjusted according to the needs, but in general, the circuit structures of the N parallel Phase branches are consistent and can be controlled by a controller, so that the control of the output voltage and/or the output current of the multi-Phase voltage regulator is realized.
As described above, fig. 1 is a schematic circuit structure diagram of a current N-Phase VR power supply, where the VR power supply includes N parallel Phase branches, each Phase branch in fig. 1 is composed of 2 switching tubes and 1 inductor, that is, each Phase branch in fig. 1 is a Buck circuit, and the 2 switching tubes in each Phase branch are complementarily turned on, so that output voltage and current can be adjusted by controlling the duty ratio of the upper tube in each Phase branch in an operating state. In addition, in some practical applications, besides adjusting the duty ratio of the upper tube in each Phase branch in the working state by means of feedback, some filtering and current equalizing mechanisms can be added in the feedback algorithm, which is not described in the application.
The highest conversion efficiency point of each Phase of the VR power source is between 10A and 20A, so in order to improve the overall conversion efficiency, the number of enabled Phase branches needs to be determined according to the load size, that is, the current Phase branch enabling number K is determined according to the current load information.
In practical application, the load size can be measured by using the load current, which is more accurate and more convenient, so in a specific embodiment of the present invention, determining the current Phase leg enabling number K according to the current load information described in step S101 may specifically include:
and determining the current starting quantity K of the Phase branches according to the current load current.
It can be understood that, when the load current is larger, the determined value of the current Phase branch enabling number K is larger, that is, the load current and the Phase branch enabling number K are positively correlated, and the specific corresponding relation can be set and adjusted according to actual needs. And it can be understood that the minimum value of the enabled quantity K of Phase branches is 1, the maximum value is N, so K is a positive integer and K is less than or equal to N.
For example, in one specific case, considering that the highest efficiency point of each phase is between 10A and 20A, one phase is enabled every time the load is set to be increased by 15A. That is, in this case, when the load current is within 15A, the determined number K of active Phase branches is 1, when the load current is between 15A and 30A, the determined number K of active Phase branches is 2, when the load current is between 30A and 45A, the determined number K of active Phase branches is 3, and so on.
Taking the determination of the current number of Phase branches k=3 as an example, in the conventional scheme, the 1 st Phase branch, the 2 nd Phase branch and the 3 rd Phase branch are controlled to work respectively through PWM1, PWM2 and PWM3, that is, the correspondence between the N Phase branches and the PWM driving signals 1 to N is fixed.
In the scheme of the application, after determining that the current enabled number K of Phase branches is 3, driving control of the corresponding K Phase branches is performed according to the current mapping information. That is, the 3 Phase branches corresponding to PWM1, PWM2, and PWM3 are not necessarily fixed 1 st Phase branch, 2 nd Phase branch, and 3 rd Phase branch, but need to be determined based on the current mapping information.
The number of each Phase leg is preset based on hardware, and is not usually adjusted, i.e., after the hardware circuit is arranged, which leg is the 1 st Phase leg and which leg is the 2 nd Phase leg, is usually preset and is not adjusted. In addition, in programming, when only 1 Phase branch needs to be started, the control of the Phase branch is performed by using the PWM1 by default, in other words, the used PWM driving signal is defined as PWM1, and similarly, when 2 Phase branches need to be started, the control of the 2 Phase branches is performed by using the PWM1 and the PWM2 by default, and the rule is generally inconvenient to adjust, so that the purpose of balancing the working time length of each Phase branch is realized by considering that the corresponding relation between the PWM driving signal and the Phase branch can be adjusted, and the whole service life of the multiphase voltage regulator is ensured.
It should be further noted that, in practical applications, since the load information changes and the mapping information also changes, the step S101 may be performed periodically. Of course, in other specific cases, step S101 may be set to have other triggering manners, for example, it may be set to perform updating of the Phase leg enabling number K whenever load information update is detected or whenever mapping information update is detected, and re-determine the corresponding K Phase legs.
Step S202: the accumulated working time length of the multiphase voltage regulator in the light load mode is recorded.
When at least 1 Phase branch is in a non-working state, the multi-Phase voltage regulator is in a light load mode, that is, only when all N Phase branches are in working states, the multi-Phase voltage regulator is in a heavy load mode. Of course, in the non-power-on state, the N Phase branches are all in the non-working state, but the scheme of the application is not executed because the controller is not powered on, and only after power-on, at least 1 Phase branch is in the working state in the multi-Phase voltage regulator.
In addition, in step S202, the accumulated operation time of the multiphase voltage regulator in the light load mode is recorded, for example, the multiphase voltage regulator is operated in the light load mode for 30 minutes, and then enters the heavy load mode, and when the heavy load mode is exited and the light load mode is resumed, the timing can be continued from 30 minutes.
Step S203: judging whether the current accumulated working time length is larger than a preset first time length threshold value or not. If so, step S204 is performed.
The specific value of the first time length threshold can be set and adjusted according to the needs, but it can be understood that if the first time length threshold is set too large, the equalization effect is affected, if the first time length threshold is set too small, the mapping information is adjusted too frequently, so that the first time length threshold can be 1 moderate value, for example, in practical application, the first time length threshold can be set to be tens of hours to hundreds of hours.
When the accumulated working time length in the light load mode is longer than a preset first time length threshold, the fact that some Phase branches possibly run for a long time is indicated, so that the scheme of the application can switch mapping information, and the reselection of the Phase branches in a working state is realized.
Step S204: mapping information for representing correspondence between the PWM driving signals 1 to N and the N Phase branches is adjusted according to a preset rule.
The mapping information may reflect the correspondence between the PWM driving signals 1 to N and the N Phase branches, and the mapping information is adjusted, that is, the correspondence is adjusted
For example, in one case, the current Phase-leg enable number K is determined to be 2 based on the current load information, and thus, drive control of 2 Phase legs can be performed by the PWM drive signal 1 and the PWM drive signal 2. If it is determined that the PWM driving signal 1 corresponds to the 3 rd Phase and the PWM driving signal 2 corresponds to the 6 th Phase according to the current mapping information, at this time, driving control of the 3 rd Phase branch and the 6 th Phase branch is performed according to the PWM driving signal 1 and the PWM driving signal 2.
Of course, when the mapping information is adjusted, a specific adjustment mode, that is, specific content of the preset rule, may be set and selected according to needs, but at least it is ensured that the mapping information is changed after adjustment.
Step S205: the accumulated operating time period is cleared each time the mapping information is adjusted.
Each time the mapping information is adjusted, the accumulated operating time length needs to be cleared, so that the accumulated operating time length can be re-timed.
In a specific embodiment of the present invention, the adjusting, according to a preset rule, mapping information for representing correspondence between PWM driving signals 1 to N and N Phase branches may specifically include:
mapping information representing correspondence between PWM driving signals 1 to N and N Phase branches is adjusted in a random adjustment manner.
The implementation mode is particularly designed to be a random adjustment mode when the mapping information is adjusted according to the preset rule, and is simple and convenient and easy to implement.
In one embodiment of the present invention, the mapping information includes a PWM sequence formed by PWM driving signals 1 to N, and items 1 to N in the PWM sequence correspond to items 1 to N of the N Phase branches in sequence.
Correspondingly, the adjusting, according to a preset rule, mapping information for representing the correspondence between the PWM driving signals 1 to N and the N Phase branches may specifically include:
every time the mapping information is adjusted, the current 1 st item of the PWM sequence is moved to the last 1 st item of the PWM sequence.
For ease of understanding, referring to fig. 3, in the example of fig. 3, n=6, PWM driving signal 1 is abbreviated as PMW1, and correspondingly, PWM2 to PWMN represent PWM driving signals 2 to N in sequence.
In the example of fig. 3, in the initial state, the PWM sequence consisting of PWM driving signals 1 to N may be expressed as PWM1-PWM2-PWM3-PWM4-PWM5-PWM6, and since items 1 to N of the sequence correspond to N Phase branches in sequence, the first item of the sequence PWM1 corresponds to the 1 st Phase branch, PWM2 corresponds to the 2 nd Phase branch, PWM3 corresponds to the 3 rd Phase branch, PWM4 corresponds to the 4 th Phase branch, PWM5 corresponds to the 5 th Phase branch, and PWM6 corresponds to the 6 th Phase branch.
In this embodiment, the mapping information is adjusted by moving the 1 st item of the PWM sequence to the last 1 st item of the PWM sequence, and in the example of fig. 3, after the 1 st adjustment of the mapping information, the PWM sequence is changed to PWM2-PWM3-PWM4-PWM5-PWM6-PWM1, where the first item of the sequence is PWM2, corresponding to the 1 st Phase branch, and correspondingly, the second item of the sequence is PWM3, corresponding to the 2 nd Phase branch, PWM4 corresponds to the 3 rd Phase branch, PWM5 corresponds to the 4 th Phase branch, PWM6 corresponds to the 5 th Phase branch, and PWM1 corresponds to the 6 th Phase branch.
In the example of fig. 3, after the mapping information is adjusted for the 2 nd time, the PWM sequence is changed to PWM3-PWM4-PWM5-PWM6-PWM1-PWM2, where the first term of the sequence is PWM3, corresponding to the 1 st Phase leg, the corresponding second term of the sequence is PWM4, corresponding to the 2 nd Phase leg, PWM5 corresponds to the 3 rd Phase leg, PWM6 corresponds to the 4 th Phase leg, PWM1 corresponds to the 5 th Phase leg, and PWM2 corresponds to the 6 th Phase leg.
As described above, when only 1 Phase leg needs to be enabled, the PWM1 is used to perform the control of the corresponding 1 Phase leg, and when 2 Phase legs need to be enabled, the PWM1 and the PWM2 are used to perform the control of the corresponding 2 Phase legs, so it can be seen that, in long term, the Phase leg corresponding to the PWM1 has the longest operation duration. In this embodiment of the present application, each Phase leg sequentially corresponds to PWM1 by shifting 1 term in the PWM sequence each time, thereby achieving a better equalization effect. That is, each Phase leg has the opportunity to become associated with PWM1, thereby entering an operational state, and the respective Phase legs are each substantially uniform in duration associated with PWM 1.
In one embodiment of the present invention, in one switching period, the triggering interval between the PWM driving signal i and the PWM driving signal i+1 is T/K; wherein T represents a switching period, i is a positive integer, and i is more than or equal to 1 and less than or equal to K-1.
In the implementation mode, K PWM driving signals are sequentially triggered in one switching period, namely, the triggering interval of the PWM driving signal i and the PWM driving signal i+1 is T/K, so that ripple waves are reduced, and the quality of electric energy output by the multiphase voltage regulator is improved. That is, in this embodiment, the PWM driving signal phases of the K Phase branches are sequentially triggered at intervals equal to 360 °/K in one switching period, for example, the PWM1 Phase is 0, the PWM2 Phase is 360 °/K, and the PWM3 Phase is 360 °/2K.
In one embodiment of the present invention, the method may further include:
and updating the adjusted mapping information to a preset storage every time after the mapping information is adjusted, so that the mapping information in the storage is called when the computer is started.
In this embodiment, it is considered that the system may be powered on or powered off, so that after each adjustment of the mapping information, the adjusted mapping information may be updated to a preset storage, for example, the adjusted mapping information is updated and set in Flash, so that the mapping information stored in Flash may be called every time the system is powered on, instead of using the default mapping information. Such an embodiment is advantageous for further equalization, i.e. system shutdown does not affect the equalization strategy of the present application.
In one embodiment of the present invention, the method may further include:
when the temperature of any 1 Phase branch is detected to exceed the temperature alarm threshold and the duration reaches the preset second duration threshold, executing the operation of adjusting the mapping information used for representing the corresponding relation between the PWM driving signals 1 to N and the N Phase branches according to the preset rule
In the foregoing embodiment, the trigger condition for adjusting the mapping information is that the accumulated working time in the light load mode is longer than the first time threshold, and in this embodiment, it is further considered that, in some occasions, due to the high ambient temperature and poor ventilation, the temperature may rise to be high after some Phase branches enter the working state for a period of time.
Therefore, in this embodiment, if it is detected that the temperature of any 1 Phase leg exceeds the temperature alarm threshold and the duration reaches the preset second duration threshold, the mapping information is adjusted, that is, the operation of step S104 is also performed, so that it is beneficial to alleviate the over-temperature situation of some Phase legs.
The specific value of the second duration threshold may be selected as desired, but is typically not set too large, for example, typically set to a few minutes.
By applying the technical scheme provided by the embodiment of the invention, the situation that only the 1 st Phase or a few phases stably work and other phases with the back trigger sequences are always in the non-working state can be considered in the traditional scheme, because in the traditional scheme, the corresponding relation between N Phase branches and PWM driving signals 1 to N is fixed, the 1 st Phase is in the working state under any load condition, in other words, the lower the number of the Phase branches is, the easier the Phase branches are in the working state, thus leading to unbalanced voltage and current stress and temperature among the phases and influencing the service life of the whole VR power supply.
In this regard, in the scheme of the present application, the current Phase branch enabling number K may be determined according to the current load information, and driving control of the corresponding K Phase branches may be performed by using the PWM driving signals 1 to K. In addition, the scheme of the application can record the accumulated working time of the multi-Phase voltage regulator in a light load mode, wherein the light load mode refers to that at least 1 Phase branch is in a non-working state. If the current accumulated working time is longer than a preset first time threshold, which indicates that Phase switching can be performed, the mapping information for representing the corresponding relation between the PWM driving signals 1 to N and the N Phase branches is adjusted according to a preset rule, it can be seen that whether a certain 1 Phase branch works is determined by the PWM driving signal corresponding to the Phase branch, and the corresponding relation is reflected in the mapping information.
In summary, the scheme of the application effectively improves the reliability of the multi-phase voltage regulator and ensures the service life of the multi-phase voltage regulator.
Corresponding to the above method embodiments, the present invention further provides a control system of a multiphase voltage regulator, which can be referred to above in a mutually corresponding manner.
Referring to fig. 4, a schematic structural diagram of a control system of a multiphase voltage regulator according to the present invention includes:
the driving control execution module 401 is configured to determine a current Phase leg enabling number K according to current load information, and perform driving control of the corresponding K Phase legs based on current mapping information through PWM driving signals 1 to PWM driving signals K;
an accumulated working time length recording module 402, configured to record an accumulated working time length of the multiphase voltage regulator in a light load mode;
a judging module 403, configured to judge whether the current accumulated working time length is greater than a preset first time length threshold; if yes, triggering a mapping information adjustment module;
a mapping information adjustment module 404, configured to adjust mapping information for representing correspondence between PWM driving signals 1 to N and N Phase branches according to a preset rule;
an accumulated working time length clearing module 405, configured to clear the accumulated working time length every time after the mapping information is adjusted;
wherein N is a positive integer not less than 2, K is a positive integer and is not more than N, the multiphase voltage regulator comprises N parallel Phase branches, and each Phase branch route mapping information shows that 1 PWM driving signal corresponding to the Phase branch is used for controlling the working state of the Phase branch; when at least 1 Phase branch is in a non-working state, the multiphase voltage regulator is in a light load mode.
In one embodiment of the present invention, in one switching period, the triggering interval between the PWM driving signal i and the PWM driving signal i+1 is T/K; wherein T represents a switching period, i is a positive integer, and i is more than or equal to 1 and less than or equal to K-1.
In a specific embodiment of the present invention, determining the current Phase leg enable number K according to the current load information includes:
and determining the current starting quantity K of the Phase branches according to the current load current.
In one embodiment of the present invention, the adjusting, according to a preset rule, mapping information for representing correspondence between PWM driving signals 1 to N and N Phase branches includes:
mapping information representing correspondence between PWM driving signals 1 to N and N Phase branches is adjusted in a random adjustment manner.
In a specific embodiment of the present invention, the mapping information includes a PWM sequence formed by PWM driving signals 1 to N, and items 1 to N in the PWM sequence correspond to items 1 to N of the N Phase branches in sequence;
correspondingly, the mapping information for representing the correspondence between the PWM driving signals 1 to N and the N Phase branches is adjusted according to a preset rule, including:
every time the mapping information is adjusted, the current 1 st item of the PWM sequence is moved to the last 1 st item of the PWM sequence.
In one embodiment of the present invention, the method further comprises:
and updating the adjusted mapping information to a preset storage every time after the mapping information is adjusted, so that the mapping information in the storage is called when the computer is started.
In one embodiment of the present invention, the method further comprises:
when it is detected that the temperature of any 1 Phase leg exceeds the temperature alarm threshold and the duration reaches a preset second duration threshold, an operation of adjusting the mapping information for representing the correspondence between the PWM driving signals 1 to N and the N Phase legs according to a preset rule is performed.
Corresponding to the above method and system embodiments, embodiments of the present invention also provide a control device for a multi-phase voltage regulator and a computer readable storage medium, which can be referred to in correspondence with the above.
Referring to fig. 5, the control apparatus of the multi-phase voltage regulator may include:
a memory 501 for storing a computer program;
a processor 502 for executing a computer program to implement the steps of the method of controlling a multi-phase voltage regulator as in any of the embodiments described above.
The computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method of controlling a multi-phase voltage regulator as described in any of the embodiments above. The computer readable storage medium as described herein includes Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
It is further noted that relational terms such as first and second, and the like are 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The principles and embodiments of the present invention have been described herein with reference to specific examples, but the description of the examples above is only for aiding in understanding the technical solution of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that the present invention may be modified and practiced without departing from the spirit of the present invention.
Claims (10)
1. A method of controlling a multi-phase voltage regulator, comprising:
determining the current Phase branch starting quantity K according to the current load information, and carrying out driving control of the corresponding K Phase branches based on the current mapping information through PWM driving signals 1 to PWM driving signals K;
recording the accumulated working time of the multiphase voltage regulator in a light load mode;
judging whether the current accumulated working time length is larger than a preset first time length threshold value or not;
if yes, mapping information used for representing the corresponding relation between the PWM driving signals 1 to N and N Phase branches is adjusted according to a preset rule;
resetting the accumulated working time length every time the mapping information is adjusted;
wherein N is a positive integer not less than 2, K is a positive integer and K is not more than N, the multiphase voltage regulator includes N parallel Phase branches, and each Phase branch performs control of the working state of the Phase branch by using 1 PWM driving signal corresponding to the Phase branch shown in the mapping information; when at least 1 Phase branch is in a non-working state, the multi-Phase voltage regulator is in the light load mode.
2. The control method of a multiphase voltage regulator according to claim 1, wherein the triggering interval between the PWM driving signal i and the PWM driving signal i+1 is T/K in one switching period; wherein T represents a switching period, i is a positive integer, and i is more than or equal to 1 and less than or equal to K-1.
3. The method of claim 1, wherein determining the current Phase leg enable number K according to the current load information comprises:
and determining the current starting quantity K of the Phase branches according to the current load current.
4. The control method of a multiphase voltage regulator according to claim 1, wherein the adjusting of the mapping information for representing the correspondence between the PWM driving signals 1 to N and the N Phase legs according to the preset rule comprises:
mapping information representing correspondence between PWM driving signals 1 to N and N Phase branches is adjusted in a random adjustment manner.
5. The control method of a multiphase voltage regulator according to claim 1, wherein the mapping information includes a PWM sequence comprising PWM driving signals 1 to N, and items 1 to N in the PWM sequence correspond to items 1 to N of the N Phase branches in sequence;
correspondingly, the adjusting the mapping information for representing the correspondence between the PWM driving signals 1 to N and the N Phase branches according to the preset rule includes:
every time the mapping information is adjusted, the current 1 st item of the PWM sequence is moved to the last 1 st item of the PWM sequence.
6. The method of controlling a multi-phase voltage regulator according to claim 1, further comprising:
and updating the adjusted mapping information to a preset storage after the mapping information is adjusted, so that the mapping information in the storage is called when the computer is started.
7. A method of controlling a multi-phase voltage regulator according to any one of claims 1 to 6, further comprising:
and when the temperature of any 1 Phase branch is detected to exceed the temperature alarm threshold and the duration reaches the preset second duration threshold, executing the operation of adjusting the mapping information used for representing the corresponding relation between the PWM driving signals 1 to N and the N Phase branches according to the preset rule.
8. A control system for a multi-phase voltage regulator, comprising:
the drive control execution module is used for determining the current Phase branch starting quantity K according to the current load information, and carrying out drive control of the corresponding K Phase branches based on the current mapping information through PWM driving signals 1 to K;
the accumulated working time length recording module is used for recording the accumulated working time length of the multi-phase voltage regulator in the light load mode;
the judging module is used for judging whether the current accumulated working time length is larger than a preset first time length threshold value or not; if yes, triggering a mapping information adjustment module;
the mapping information adjustment module is used for adjusting mapping information used for representing the corresponding relation between the PWM driving signals 1 to N and N Phase branches according to a preset rule;
the accumulated working time length resetting module is used for resetting the accumulated working time length every time after the mapping information is adjusted;
wherein N is a positive integer not less than 2, K is a positive integer and K is not more than N, the multiphase voltage regulator includes N parallel Phase branches, and each Phase branch performs control of the working state of the Phase branch by using 1 PWM driving signal corresponding to the Phase branch shown in the mapping information; when at least 1 Phase branch is in a non-working state, the multi-Phase voltage regulator is in the light load mode.
9. A control device of a multi-phase voltage regulator, comprising:
a memory for storing a computer program;
a processor for executing the computer program to carry out the steps of the method of controlling a multiphase voltage regulator according to any one of claims 1 to 7.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method of controlling a multiphase voltage regulator according to any of claims 1 to 7.
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| CN202310141861.0A CN116131607A (en) | 2023-02-17 | 2023-02-17 | Control method, system, equipment and storage medium of multi-phase voltage regulator |
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| CN202310141861.0A CN116131607A (en) | 2023-02-17 | 2023-02-17 | Control method, system, equipment and storage medium of multi-phase voltage regulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116995918A (en) * | 2023-09-26 | 2023-11-03 | 茂睿芯（深圳）科技有限公司 | Multiphase power supply control circuit and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116995918A (en) * | 2023-09-26 | 2023-11-03 | 茂睿芯（深圳）科技有限公司 | Multiphase power supply control circuit and electronic equipment |
| CN116995918B (en) * | 2023-09-26 | 2024-03-29 | 茂睿芯（深圳）科技有限公司 | Multiphase power supply control circuit and electronic equipment |
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