CN118868568B - Voltage stabilizing control method and system for wide-range regulating power supply - Google Patents
Voltage stabilizing control method and system for wide-range regulating power supply Download PDFInfo
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- CN118868568B CN118868568B CN202410950462.3A CN202410950462A CN118868568B CN 118868568 B CN118868568 B CN 118868568B CN 202410950462 A CN202410950462 A CN 202410950462A CN 118868568 B CN118868568 B CN 118868568B
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
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Abstract
The invention relates to the technical field of power supply voltage stabilizing adjustment, and particularly discloses a control method and a control system for regulating power supply voltage in a wide range, wherein a standard positive voltage error integrated value is calculated and obtained, an error signal is obtained by comparing the standard positive voltage error integrated value with an error signal threshold value, the voltage change rate at the end of a monitoring period T is calculated and obtained, output voltage is adjusted to enable the output voltage change rate to be reduced to 0, the output voltage is adjusted to a voltage stabilizing value, the power supply voltage can be adaptively adjusted and controlled based on a preset voltage adjusting time value, different use scenes can be better met for the output of the power supply voltage, the adjusting time length can be set and controlled according to the use requirement adaptability, the stability of the power supply voltage can be quickly adjusted after the power supply voltage is changed abnormally, the strain capacity is better, the control method is applicable to various voltage change conditions, and the adjustment is more accurate.
Description
Technical Field
The invention relates to the technical field of power supply voltage stabilization regulation, in particular to a control method and a control system for regulating power supply voltage stabilization in a wide range.
Background
As the volume of communication power supply is continuously reduced, the power density is continuously improved, and the control mode is more prone to digital control technology with low cost and high efficiency. In a digitally controlled power supply, in order to improve the bandwidth and gain of a control loop, a fast link is generally introduced into the loop, the fast link can improve the loop response, but the output voltage stabilizing capability of the power supply can be reduced at the same time, and the index requirements of industry standards on voltage stabilizing precision and load adjustment rate can not be met under some worse working conditions.
In the existing control method of the voltage stabilizing precision of the power supply, a current sampling compensation unit is added to generate corresponding compensation voltage according to the current sampling compensation unit;
however, the existing control scheme of the voltage stabilizing precision of the power supply has low control precision, can not achieve more adaptive change adjustment in various states facing the change of the output voltage of the power supply, causes overlong adjustment time, is complex in circuit control, and can not be adjusted rapidly and accurately according to different application scenes.
Disclosure of Invention
The invention aims to provide a voltage stabilizing control method and a control system for a wide-range adjusting power supply, so as to solve the problems in the background.
The aim of the invention can be achieved by the following technical scheme:
A voltage stabilizing control method for a wide-range regulating power supply comprises the steps of dividing a monitoring period T by a unit time T, measuring a voltage value of each time point e, and marking the voltage value as U e, wherein e is 1,2 and 3, and e is a positive integer;
Comparing the target positive voltage error integrated value Uzzb with the error signal threshold Uwc, generating a stable signal if the target positive voltage error integrated value Uzzb is less than or equal to the error signal threshold Uwc, and generating an error signal if the target positive voltage error integrated value Uzzb is greater than the error signal threshold Uwc;
Based on the voltage change rate VU T, judging the voltage value U e-1 of the (e-1) th time point and the output voltage U e of the monitoring period at the end time point;
If U e is larger than U e-1, generating a speed-reducing voltage-regulating signal;
If U e is smaller than U e-1, generating a speed-increasing voltage-regulating signal;
If U e is equal to U e-1, generating a stable voltage regulating signal;
Based on a control signal under a speed-reducing voltage-regulating signal, regulating the output voltage to enable the change rate of the output voltage to be reduced to 0, and regulating the output voltage to a voltage stabilizing value;
Based on a control signal under the speed-increasing voltage-regulating signal, regulating the output voltage, wherein the change rate of the output voltage is in a descending state, so that the change rate of the output voltage is increased by 0, and regulating the output voltage to a voltage stabilizing value;
Based on the stable voltage regulation signal, the output voltage is regulated, and the output voltage is regulated to a voltage stabilization value Uwd and is maintained.
As a further proposal of the invention, the voltage deviation data comprises a voltage stabilizing value Uwd, a voltage deviation extreme value Ucj and an error signal threshold value Uwc;
The calculation mode of the standard positive voltage error integrated value Uzzb is as follows:
Obtaining a voltage stabilizing value Uwd, and obtaining a voltage deviation value Upcz e of each time point through Upcz e＝|Ue -Uwd |calculation, wherein the voltage stabilizing value Uwd represents a reference standard value of a circuit voltage stabilizing state;
Comparing the voltage deviation value Upcz e of each time point with the voltage deviation extremum Ucj to obtain the number of time points with the voltage deviation value Upcz e larger than the voltage deviation extremum Ucj, and marking as f;
By passing through And calculating to obtain a standard positive voltage error integrated value Uzzb.
As a further scheme of the invention, the voltage change rate VU T at the end of the monitoring period T is calculated by the following steps:
acquiring a voltage value U e-1 at the e-1 time point in the monitoring period T, and simultaneously acquiring an output voltage at the last time of the monitoring period T and marking the output voltage as U e;
By passing through The voltage change rate VU T at the end of the monitoring period T is calculated.
Based on the voltage-reducing regulation signal, comparing the output voltage U e at the end of the monitoring period T with the voltage stabilizing value Uwd;
If U e is larger than Uwd, generating a speed-reducing and pressure-reducing signal;
if U e is equal to Uwd, generating a speed-reducing voltage-stabilizing signal;
if U e is smaller than Uwd, a speed-reducing pressure-controlling signal is generated.
Based on the voltage increasing and regulating signal, comparing the output voltage U e at the end of the monitoring period T with the voltage stabilizing value Uwd;
If U e is smaller than Uwd, generating a speed-increasing and pressure-increasing signal;
if U e is equal to Uwd, generating a speed-increasing and voltage-stabilizing signal;
if U e is larger than Uwd, generating a speed-increasing pressure control signal.
Based on the stable voltage regulating signal, comparing the output voltage U e at the end of the monitoring period T with the voltage stabilizing value Uwd;
If U e is smaller than Uwd, generating a stable boost signal;
If U e is equal to Uwd, generating a stable holding signal;
if U e is greater than Uwd, a smooth buck signal is generated.
Based on the signal of lowering down speed and lowering down voltage, obtain the voltage change rate VU T at the end of the monitoring period T; based on a switching tube on-time change model, byCalculating to obtain a switching tube on time adjustment value DTs, wherein alpha is a switching tube on time influence coefficient, and beta is a voltage change correction coefficient;
Reducing the on time of the switching tube to DTs to reduce the voltage change rate VU T to 0, obtaining the updated value DTTo of the on time of the switching tube, reducing the output voltage U e at the end of the monitoring period T to a voltage stabilizing value Uwd to obtain a preset voltage regulating time value Tksj, and controlling the switching tube to be in a stable state by Calculating to obtain an output voltage regulation rate value Vutk;
By passing through Calculating to obtain a switching tube conduction regulation and control adjustment time DTtk, further reducing a switching tube conduction time update value DTTo by DTtk, maintaining a preset voltage regulation and control time Tksj, reducing an output voltage U e to a voltage stabilizing value Uwd, and then performing voltage output by using the switching tube conduction time update value DTTo;
Based on the speed-reducing voltage-stabilizing signal, through Reducing the switching tube on time to DTs to enable the voltage change rate VU T to be 0, obtaining a switching tube on time updating value DTTo, and keeping the state for voltage output;
Based on the deceleration voltage control signal, the time required for U e to rise to Uwd at the voltage change rate VU T, i.e., the voltage control time Tsg, is calculated, wherein, Then at the end of the control time Tsg, the voltage change rate VU T is reduced to 0 byAnd reducing the switching tube on time by DTs to reduce the voltage change rate VU T to 0, obtaining a switching tube on time updating value DTTo, and keeping the state for voltage output.
As a further proposal of the invention, the voltage change rate VU T at the end of the monitoring period T is obtained based on the speed-increasing and pressure-increasing signals byCalculating to obtain a switching tube on time adjustment value DTs;
Then the on time of the switching tube is increased by DTs to increase the voltage change rate VU T to 0, the updated value DTTo of the on time of the switching tube is obtained, the output voltage U e at the end of the monitoring period T is increased to a voltage stabilizing value Uwd, the preset voltage regulating time value Tksj is obtained, and the voltage is regulated by Calculating to obtain an output voltage regulation rate value Vutk;
By passing through Calculating to obtain a switching tube conduction regulation and control adjustment time DTtk, increasing a switching tube conduction time update value DTTo by DTtk, maintaining a preset voltage regulation and control time Tksj, increasing an output voltage U e to a voltage stabilizing value Uwd, and outputting voltage by using the switching tube conduction time update value DTTo;
based on the speed-increasing and voltage-stabilizing signal, through Raising the switching tube on time to be DTs to enable the voltage change rate VU T to be raised to 0, obtaining a switching tube on time updating value DTTo at the moment, and keeping the state for voltage output;
based on the speed-increasing voltage control signal, the time required for U e to decrease to Uwd at the voltage change rate VU T, i.e., the voltage control time Tsg, is calculated, wherein, Then at the end of the control time Tsg, the voltage change rate VU T is changed to 0, and the voltage change rate VU is passed throughAnd increasing the switching tube on time by DTs to enable the voltage change rate VU T to be 0, acquiring a switching tube on time updating value DTTo at the moment, and keeping the state to output the voltage.
As a further scheme of the invention, the method comprises the steps of obtaining a preset voltage regulation time value Tksj based on a stable boost signal and obtaining a voltage regulation time value based on the preset voltage regulation time value byCalculating to obtain output voltage regulation rate value Vutk, then passingCalculating to obtain a switching tube conduction regulation and control adjustment time DTtk, increasing the switching tube conduction time DTtk, maintaining a preset voltage regulation and control time Tksj to increase the output voltage U e to a voltage stabilizing value Uwd, reducing the switching tube conduction time DTtk, and maintaining a stable output voltage;
acquiring a preset voltage regulation time value Tksj based on a stable voltage reduction signal by Calculating to obtain an output voltage regulation rate value Vutk;
By passing through Calculating to obtain the switching tube conduction regulation and control adjustment time DTtk, reducing DTtk the switching tube conduction time, maintaining Tksj the preset voltage regulation and control time to reduce the output voltage U e to the voltage stabilizing value Uwd, then increasing DTtk the switching tube conduction time, and then maintaining the stable output voltage.
As a further aspect of the invention, a wide range regulated power supply voltage regulation control system includes:
The data acquisition module is used for dividing the monitoring period T by the unit time T, measuring the voltage value of each time point e and marking the voltage value as U e, wherein e is 1,2 and 3, and e is a positive integer;
the data processing module is used for comparing the standard positive voltage error integrated value Uzzb with the error signal threshold Uwc, generating a stable signal if the standard positive voltage error integrated value Uzzb is smaller than or equal to the error signal threshold Uwc, and generating an error signal if the standard positive voltage error integrated value Uzzb is larger than the error signal threshold Uwc;
The data judging module is used for calculating and obtaining the voltage change rate VU T at the end of the monitoring period T based on the error signal, judging the voltage value U e-1 at the e-1 time point and the output voltage U e at the end of the monitoring period T based on the voltage change rate VU T, generating a speed-reducing voltage-regulating signal if U e is larger than U e-1, generating an speed-increasing voltage-regulating signal if U e is smaller than U e-1, and generating a stable voltage-regulating signal if U e is equal to U e-1;
The signal processing module is used for adjusting the output voltage based on a control signal under a speed-reducing voltage-regulating signal to enable the change rate of the output voltage to be reduced to 0 and adjusting the output voltage to a voltage stabilizing value, adjusting the output voltage based on the control signal under the speed-reducing voltage-regulating signal to enable the change rate of the output voltage to be increased by 0 and adjusting the output voltage to the voltage stabilizing value because the change rate of the output voltage is in a reduced state, and adjusting the output voltage to the voltage stabilizing value Uwd and keeping the output voltage based on a stable voltage-regulating signal.
The invention has the beneficial effects that:
According to the invention, the output voltage in the power supply output process is monitored to judge the change state of the output voltage in the working process, so as to judge whether the output voltage is in a stable state, and then the output voltage is further analyzed and regulated based on the change state of the output voltage, after the output voltage fluctuates, the on-state time regulating value is calculated and obtained based on the preset voltage regulating time value, and then the on-state time is regulated and controlled to control the output voltage of the power supply, and meanwhile, the change rate of the output voltage is regulated and controlled firstly in the regulating process, the change rate of the output voltage is regulated to be in a stable state, and then the voltage regulating and controlling change rate of the output voltage regulated to be a voltage stabilizing value is calculated and obtained based on the stable output voltage value, and the regulating time of the on-state time of the switching tube is further calculated and obtained.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic of the workflow of the present invention;
fig. 2 is a block diagram of the system of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the invention provides a voltage stabilizing control method for a wide-range adjusting power supply, which comprises the following steps:
The method comprises the steps of 01 dividing a monitoring period T by a unit time T, measuring a voltage value of each time point e, and marking the voltage value as U e, wherein e is 1, 2 and 3, and e is a positive integer, simultaneously obtaining voltage deviation data, wherein the voltage deviation data comprises a voltage stabilizing value Uwd, a voltage deviation extremum Ucj and an error signal threshold Uwc, and calculating and obtaining a standard positive voltage error integrated value Uzzb;
specifically, the method comprises the following steps:
Step 011, calculating to obtain a voltage deviation value Upcz e of each time point through Upcz e＝|Ue -Uwd | based on a voltage stabilizing value Uwd, wherein the voltage stabilizing value Uwd represents a reference standard value of a circuit voltage stabilizing state;
Step 012, obtaining voltage deviation extremum Ucj, comparing the voltage deviation value Upcz e of each time point with the voltage deviation extremum Ucj to obtain the number of time points with the voltage deviation value Upcz e larger than the voltage deviation extremum Ucj, and marking as f;
Step 013 by Calculating to obtain a standard positive voltage error integrated value Uzzb;
step 02, comparing the standard positive voltage error integrated value Uzzb with an error signal threshold Uwc;
if the standard positive voltage error integrated value Uzzb is smaller than or equal to the error signal threshold Uwc, generating a stable signal;
if the standard positive voltage error integrated value Uzzb is greater than the error signal threshold Uwc, generating an error signal;
Step 03, calculating and obtaining a voltage change rate VU T at the end time of a monitoring period T based on an error signal;
the method specifically comprises the following steps:
acquiring a voltage value U e-1 at the e-1 time point in the monitoring period T, and simultaneously acquiring an output voltage at the last time of the monitoring period T and marking the output voltage as U e;
By passing through Calculating to obtain a voltage change rate VU T at the end of the monitoring period T;
Step 04, based on the voltage change rate VU T, judging the voltage value U e-1 at the e-1 time point and the output voltage U e at the end of the monitoring period T;
If U e is larger than U e-1, indicating that the voltage change rate VU T at the end of the monitoring period T is larger than 0, namely, the voltage is in a rising state, generating a speed-reducing voltage-regulating signal and executing step 05, wherein the speed-reducing voltage-regulating signal comprises a speed-reducing voltage-reducing signal, a speed-reducing voltage-stabilizing signal and a speed-reducing voltage-controlling signal;
if U e is smaller than U e-1, the voltage change rate VU T at the end of the monitoring period T is smaller than 0, namely the voltage is in a reduced state, a speed-increasing voltage regulating signal is generated and the step 06 is executed, wherein the speed-increasing voltage regulating signal comprises a speed-increasing voltage-increasing signal, a speed-increasing voltage-stabilizing signal and a speed-increasing voltage-controlling signal;
If U e is equal to U e-1, the voltage change rate VU T at the end of the monitoring period T is equal to 0, namely the voltage is in a constant voltage state, a stable voltage regulating signal is generated and step 07 is executed, wherein the stable voltage regulating signal comprises a stable voltage boosting signal, a stable holding signal and a stable voltage reducing signal;
step 05, based on the step-down voltage regulating signal, further comparing the output voltage U e at the end of the monitoring period T with the voltage stabilizing value Uwd;
if U e is larger than Uwd, at this time, the output voltage is larger than the voltage stabilizing value and is in a rising state, regulation and control should be immediately executed, the output voltage is reduced, and a speed-reducing and voltage-reducing signal is generated at this time;
If U e is equal to Uwd, it indicates that the output voltage is equal to the voltage stabilizing value, but because the voltage change rate VU T is greater than 0, in order to avoid the output voltage from continuously becoming larger, regulation and control should be immediately executed, and U e is kept equal to Uwd, i.e. the output voltage is kept stable;
If U e is smaller than Uwd, the output voltage is smaller than the voltage stabilizing value, but because the voltage change rate VU T is larger than 0, regulating and controlling are performed when U e is increased to Uwd, and U e is kept equal to Uwd, so that the output voltage is kept stable;
Step 06, comparing the output voltage U e at the end of the monitoring period T with the voltage stabilizing value Uwd based on the step-up voltage regulating signal;
If U e is smaller than Uwd, which indicates that the output voltage is smaller than the voltage stabilizing value and is in a descending state, immediately executing regulation and control, and increasing the output voltage, and generating a speed-increasing and voltage-increasing signal at the moment;
If U e is equal to Uwd, it indicates that the output voltage is equal to the voltage stabilizing value at this time, but because the voltage change rate VU T is smaller than 0, in order to avoid the output voltage from continuously becoming smaller, regulation and control should be immediately executed, and U e is kept equal to Uwd, i.e. the output voltage is kept stable;
If U e is larger than Uwd, the output voltage is larger than the voltage stabilizing value, but because the voltage change rate VU T is smaller than 0, U e is regulated and controlled when the voltage is reduced to Uwd, and U e is kept equal to Uwd, so that the output voltage is kept stable;
Step 07, comparing the output voltage U e at the end of the monitoring period T with a voltage stabilizing value Uwd based on the stable voltage regulating signal;
If U e is smaller than Uwd, the output voltage is smaller, but the output voltage change is more stable, at the moment, the output voltage is adjusted to a voltage stabilizing value Uwd to ensure that the subsequent output voltage is in a relatively stable state, and the output voltage is directly adjusted to be raised to Uwd from U e;
if U e is equal to Uwd, the output voltage is the same as the voltage stabilizing value, the change rate at the moment is 0, the stable state is kept, and a stable keeping signal is generated;
If U e is greater than Uwd, it indicates that the output voltage is greater, but the output voltage is more stable, at this time, the output voltage is adjusted to a voltage stable value Uwd to ensure that the subsequent output voltage is in a relatively stable state, at this time, the output voltage is directly adjusted to be reduced from U e to a voltage stable value Uwd, and a stable step-down signal is generated.
The output voltage in the power supply output process is monitored to judge the change state of the output voltage in the working process, further judge whether the output voltage is in a stable state or not, and further analyze and regulate the output voltage based on the change state of the output voltage so that the output voltage of the power supply can be kept in a more stable state within a certain regulation range.
Example two
Based on the above embodiment, the invention provides a voltage stabilizing control method for a wide-range adjusting power supply, which comprises the following steps of:
based on a control signal under a speed-reducing voltage-regulating signal, regulating the output voltage to enable the change rate of the output voltage to be reduced to 0, and regulating the output voltage to a voltage stabilizing value so as to enable the subsequent output voltage to be kept in a relatively stable state;
Specific:
Based on the step-down signal, the voltage change rate VU T at the end of the monitoring period T is obtained by Calculating to obtain a switching tube on time adjustment value DTs, wherein alpha is a switching tube on time influence coefficient, and beta is a voltage change correction coefficient;
Then, reducing the on time of the switching tube by DTs to enable the voltage change rate VU T to be reduced to 0, at the moment, acquiring a switching tube on time update value DTTo, and then, reducing the output voltage U e at the end time of the monitoring period T to a voltage stabilizing value Uwd, at the moment, acquiring a preset voltage regulation time value Tksj;
Based on preset voltage regulation time Tksj, by Calculating to obtain an output voltage regulation rate value Vutk;
Then, through Calculating to obtain a switching tube conduction regulation and control adjustment time DTtk, further reducing a switching tube conduction time update value DTTo by DTtk, maintaining a preset voltage regulation and control time Tksj, reducing an output voltage U e to a voltage stabilizing value Uwd, and then performing voltage output by using the switching tube conduction time update value DTTo;
Since U e is Uwd based on the step-down voltage stabilizing signal, it is only necessary to reduce the voltage change rate VU T at the time of the monitoring period T to 0, and at this time, based on the switching tube on time change model, the voltage is calculated by Calculating to obtain a switching tube on time adjustment value DTs, wherein alpha is an on time influence coefficient, beta is a voltage change correction coefficient, then reducing the switching tube on time to DTs to reduce the voltage change rate VU T to 0, obtaining a switching tube on time update value DTTo at the moment, and keeping the state for voltage output;
Based on the deceleration control voltage signal, since the voltage change rate VU T is greater than 0, but U e is smaller than Uwd, the time required for U e to rise to Uwd at the voltage change rate VU T, i.e., the control voltage time Tsg, is calculated, wherein, Then at the end of the control time Tsg, the voltage change rate VU T is reduced to 0, and at this time, the voltage is changed based on the switching tube on time change model byCalculating to obtain a switching tube on time adjustment value DTs, wherein alpha is an on time influence coefficient, beta is a voltage change correction coefficient, then reducing the switching tube on time to DTs to reduce the voltage change rate VU T to 0, obtaining a switching tube on time update value DTTo at the moment, and keeping the state for voltage output;
based on a control signal under the speed-increasing voltage-regulating signal, regulating the output voltage, wherein the change rate of the output voltage is in a reduced state, so that the change rate of the output voltage is increased by 0, and the output voltage is regulated to a voltage stabilizing value so as to keep the subsequent output voltage in a relatively stable state;
Specific:
Based on the step-up signal, the voltage change rate VU T at the end of the monitoring period T is obtained by a switching tube on time change model Calculating to obtain a switching tube on time adjustment value DTs, wherein alpha is a switching tube on time influence coefficient, and beta is a voltage change correction coefficient;
Then, increasing the on time of the switching tube by DTs to increase the voltage change rate VU T to 0, at this time, acquiring a switching tube on time update value DTTo, and then, increasing the output voltage U e at the end time of the monitoring period T to a voltage stabilizing value Uwd, at this time, acquiring a preset voltage regulation time value Tksj;
Based on preset voltage regulation time Tksj, by Calculating to obtain an output voltage regulation rate value Vutk;
Then, through Calculating to obtain a switching tube conduction regulation and control adjustment time DTtk, further increasing a switching tube conduction time update value DTTo by DTtk, maintaining a preset voltage regulation and control time Tksj, increasing an output voltage U e to a voltage stabilizing value Uwd, and then carrying out voltage output by using the switching tube conduction time update value DTTo;
Based on the speed-increasing voltage-stabilizing signal, U e is equal to Uwd, so that the voltage change rate VU T at the moment of the monitoring period T is only required to be increased to 0, and at the moment, based on the switching tube on-time change model, the voltage change rate VU T is calculated by Calculating to obtain a switching tube on time adjustment value DTs, wherein alpha is an on time influence coefficient, beta is a voltage change correction coefficient, then increasing the switching tube on time by DTs to increase the voltage change rate VU T to 0, obtaining a switching tube on time update value DTTo at the moment, and keeping the state for voltage output;
Based on the step-up voltage control signal, since the voltage change rate VU T is smaller than 0, but U e is larger than Uwd, the time required for U e to decrease to Uwd at the voltage change rate VU T, that is, the voltage control time Tsg, is calculated, wherein, Then at the end of the control time Tsg, the voltage change rate VU T is changed to 0, and at the moment, the switching tube on time change model is based onCalculating to obtain a switching tube on time adjustment value DTs, wherein alpha is an on time influence coefficient, beta is a voltage change correction coefficient, then increasing the switching tube on time by DTs to enable a voltage change rate VU T to become 0, obtaining a switching tube on time update value DTTo at the moment, and keeping the state for voltage output;
Based on the stable voltage regulating signal, regulating the output voltage to a voltage stabilizing value Uwd, and maintaining;
Specific:
Acquiring a preset voltage regulation time value Tksj based on the stable boost signal, and based on the preset voltage regulation time value, performing power supply control by Calculating to obtain output voltage regulation rate value Vutk, then passingCalculating to obtain a switching tube conduction regulation and control adjustment time DTtk, then increasing the switching tube conduction time DTtk, and keeping a preset voltage regulation and control time Tksj to enable an output voltage U e to be increased to a voltage stabilizing value Uwd, then reducing the switching tube conduction time DTtk, and then keeping a stable output voltage;
acquiring a preset voltage regulation time value Tksj based on the stable voltage reduction signal, and based on the preset voltage regulation time value, performing voltage regulation by Calculating to obtain an output voltage regulation rate value Vutk;
Then, through Calculating to obtain the switching tube conduction regulation and control adjustment time DTtk, further reducing DTtk the switching tube conduction time, maintaining Tksj the preset voltage regulation and control time to enable the output voltage U e to be reduced to the voltage stabilizing value Uwd, then increasing DTtk the switching tube conduction time, and then maintaining the stable output voltage.
After the output voltage fluctuates, the on-state time adjustment value is calculated and obtained based on the preset voltage adjustment time value, then the on-state time is adjusted and controlled to control the output voltage of the power supply to be rapidly and accurately adjusted, meanwhile, in the adjustment process, the change rate of the output voltage is adjusted to be in a stable state, then the voltage adjustment change rate of the output voltage adjusted to the voltage stabilizing value is obtained based on the stabilized output voltage value through calculation of the preset voltage adjustment time value, the adjustment time of the on-state time of the switching tube is further obtained through calculation, the stability of the power supply voltage in the output working state is better ensured, in the adjustment process, the output of the power supply voltage can be adaptively adjusted and controlled based on the preset voltage adjustment time value, different use scenes can be better met according to the set adjustment time of the use requirement adaptability, the power supply voltage can be rapidly and stably adjusted after the abnormality occurs, the strain capacity is better, the adjustment is applicable to various change conditions of the voltage, and the adjustment is more accurate.
Example III
In the above embodiment, the output voltage is adjusted by adjusting the on time of the switching tube, specifically, the change of the output voltage is controlled by the on time of the switching tube, which is specifically implemented by adjusting the duty ratio of the switch, that is, the ratio of the on time to the total period;
therefore, the on time of the switching tube is reduced, the output voltage can be reduced, the on time of the switching tube is increased, and the output voltage is improved;
regarding the construction mode of the on-time variation model of the switching tube, the embodiment discloses the following construction modes, which specifically include:
Acquiring a historical regulation data set comprising a historical output voltage U ls, a historical switching tube conduction regulation adjustment time DTs ls and a historical voltage change rate VU TS, training the historical regulation data set, and performing power supply control by Calculating and obtaining an on-time influence coefficient alpha and a voltage change correction coefficient beta, and further obtaining a switching tube on-time change model
Example IV
Referring to fig. 2, based on the above embodiment, the present embodiment discloses a wide-range regulated power supply voltage stabilizing control system, including:
The data acquisition module is used for dividing the monitoring period T by the unit time T, measuring the voltage value of each time point e and marking the voltage value as U e, wherein e is 1,2 and 3, and e is a positive integer;
the data processing module is used for comparing the standard positive voltage error integrated value Uzzb with the error signal threshold Uwc, generating a stable signal if the standard positive voltage error integrated value Uzzb is smaller than or equal to the error signal threshold Uwc, and generating an error signal if the standard positive voltage error integrated value Uzzb is larger than the error signal threshold Uwc;
The data judging module is used for calculating and obtaining the voltage change rate VU T at the end of the monitoring period T based on the error signal, judging the voltage value U e-1 at the e-1 time point and the output voltage U e at the end of the monitoring period T based on the voltage change rate VU T, generating a speed-reducing voltage-regulating signal if U e is larger than U e-1, generating an speed-increasing voltage-regulating signal if U e is smaller than U e-1, and generating a stable voltage-regulating signal if U e is equal to U e-1;
The signal processing module is used for adjusting the output voltage based on a control signal under a speed-reducing voltage-regulating signal to enable the change rate of the output voltage to be reduced to 0 and adjusting the output voltage to a voltage stabilizing value, adjusting the output voltage based on the control signal under the speed-reducing voltage-regulating signal to enable the change rate of the output voltage to be increased by 0 and adjusting the output voltage to the voltage stabilizing value because the change rate of the output voltage is in a reduced state, and adjusting the output voltage to the voltage stabilizing value Uwd and keeping the output voltage based on a stable voltage-regulating signal.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (9)
1. The voltage stabilizing control method for the wide-range regulating power supply is characterized by comprising the following steps of dividing a monitoring period T by a unit time T, measuring a voltage value of each time point e and marking the voltage value as U e, wherein e is 1,2 and 3, and e is a positive integer;
the voltage deviation data comprises a voltage stabilizing value Uwd, a voltage deviation extreme value Ucj and an error signal threshold value Uwc;
The calculation mode of the standard positive voltage error integrated value Uzzb is as follows:
Obtaining a voltage stabilizing value Uwd, and obtaining a voltage deviation value Upcz e of each time point through Upcz e＝|Ue -Uwd |calculation, wherein the voltage stabilizing value Uwd represents a reference standard value of a circuit voltage stabilizing state;
Comparing the voltage deviation value Upcz e of each time point with the voltage deviation extremum Ucj to obtain the number of time points with the voltage deviation value Upcz e larger than the voltage deviation extremum Ucj, and marking as f;
By passing through Calculating to obtain a standard positive voltage error integrated value Uzzb;
Comparing the target positive voltage error integrated value Uzzb with the error signal threshold Uwc, generating a stable signal if the target positive voltage error integrated value Uzzb is less than or equal to the error signal threshold Uwc, and generating an error signal if the target positive voltage error integrated value Uzzb is greater than the error signal threshold Uwc;
Based on the voltage change rate VU T, judging the voltage value U e-1 of the (e-1) th time point and the output voltage U e of the monitoring period at the end time point;
If U e is larger than U e-1, generating a speed-reducing voltage-regulating signal;
If U e is smaller than U e-1, generating a speed-increasing voltage-regulating signal;
If U e is equal to U e-1, generating a stable voltage regulating signal;
Based on a control signal under a speed-reducing voltage-regulating signal, regulating the output voltage to enable the change rate of the output voltage to be reduced to 0, and regulating the output voltage to a voltage stabilizing value;
Based on a control signal under the speed-increasing voltage-regulating signal, regulating the output voltage, wherein the change rate of the output voltage is in a descending state, so that the change rate of the output voltage is increased by 0, and regulating the output voltage to a voltage stabilizing value;
Based on the stable voltage regulation signal, the output voltage is regulated, and the output voltage is regulated to a voltage stabilization value Uwd and is maintained.
2. The method for controlling voltage regulation of a wide-range regulated power supply according to claim 1, wherein the voltage change rate VU T at the end of the monitoring period T is calculated by:
acquiring a voltage value U e-1 at the e-1 time point in the monitoring period T, and simultaneously acquiring an output voltage at the last time of the monitoring period T and marking the output voltage as U e;
By passing through The voltage change rate VU T at the end of the monitoring period T is calculated.
3. The method according to claim 1, wherein the output voltage U e at the end of the monitoring period T is compared with the voltage regulated value Uwd based on the step-down voltage regulation signal;
If U e is larger than Uwd, generating a speed-reducing and pressure-reducing signal;
if U e is equal to Uwd, generating a speed-reducing voltage-stabilizing signal;
if U e is smaller than Uwd, a speed-reducing pressure-controlling signal is generated.
4. The method according to claim 1, wherein the output voltage U e at the end of the monitoring period T is compared with the voltage regulated value Uwd based on the step-up voltage signal;
If U e is smaller than Uwd, generating a speed-increasing and pressure-increasing signal;
if U e is equal to Uwd, generating a speed-increasing and voltage-stabilizing signal;
if U e is larger than Uwd, generating a speed-increasing pressure control signal.
5. The method according to claim 1, wherein the output voltage U e at the end of the monitoring period T is compared with the voltage regulated value Uwd based on the steady voltage regulation signal;
If U e is smaller than Uwd, generating a stable boost signal;
If U e is equal to Uwd, generating a stable holding signal;
if U e is greater than Uwd, a smooth buck signal is generated.
6. The method for voltage regulation control of a wide range regulator according to claim 3 wherein the voltage change rate VU T at the end of the monitoring period T is obtained based on the step-down signal by a switching tube on time change modelCalculating to obtain a switching tube on time adjustment value DTs, wherein alpha is a switching tube on time influence coefficient, and beta is a voltage change correction coefficient;
Reducing the on time of the switching tube to DTs to reduce the voltage change rate VU T to 0, obtaining the updated value DTTo of the on time of the switching tube, reducing the output voltage U e at the end of the monitoring period T to a voltage stabilizing value Uwd to obtain a preset voltage regulating time value Tksj, and controlling the switching tube to be in a stable state by Calculating to obtain an output voltage regulation rate value Vutk;
By passing through Calculating to obtain a switching tube conduction regulation and control adjustment time DTtk, further reducing a switching tube conduction time update value DTTo by DTtk, maintaining a preset voltage regulation and control time Tksj, reducing an output voltage U e to a voltage stabilizing value Uwd, and then performing voltage output by using the switching tube conduction time update value DTTo;
Based on the speed-reducing voltage-stabilizing signal, through Reducing the switching tube on time to DTs to enable the voltage change rate VU T to be 0, obtaining a switching tube on time updating value DTTo, and keeping the state for voltage output;
Based on the deceleration voltage control signal, the time required for U e to rise to Uwd at the voltage change rate VU T, i.e., the voltage control time Tsg, is calculated, wherein, Then at the end of the control time Tsg, the voltage change rate VU T is reduced to 0 byAnd reducing the switching tube on time by DTs to reduce the voltage change rate VU T to 0, obtaining a switching tube on time updating value DTTo, and keeping the state for voltage output.
7. The method of claim 4, wherein the voltage change rate VU T at the end of the monitoring period T is obtained based on the step-up and step-down signals byCalculating to obtain a switching tube on time adjustment value DTs, wherein alpha is a switching time influence coefficient, and beta is a voltage change correction coefficient;
Then the on time of the switching tube is increased by DTs to increase the voltage change rate VU T to 0, the updated value DTTo of the on time of the switching tube is obtained, the output voltage U e at the end of the monitoring period T is increased to a voltage stabilizing value Uwd, the preset voltage regulating time value Tksj is obtained, and the voltage is regulated by Calculating to obtain an output voltage regulation rate value Vutk;
By passing through Calculating to obtain switching tube conduction regulation and control adjustment time DTtk, wherein alpha is a conduction time influence coefficient, beta is a voltage change correction coefficient, and raising a switching tube conduction time update value DTTo by DTtk;
based on the speed-increasing and voltage-stabilizing signal, through Calculating to obtain a switching tube on time adjustment value DTs, wherein alpha is a switching time influence coefficient, and beta is a voltage change correction coefficient; raising the switching tube on time by DTs to raise the voltage change rate VU T to 0, acquiring a switching tube on time update value DTTo at the moment, and keeping the state for voltage output;
based on the speed-increasing voltage control signal, the time required for U e to decrease to Uwd at the voltage change rate VU T, i.e., the voltage control time Tsg, is calculated, wherein, Then at the end of the control time Tsg, the voltage change rate VU T is changed to 0, and the voltage change rate VU is passed throughAnd increasing the switching tube on time by DTs to change the voltage change rate VU T to 0, acquiring a switching tube on time updating value DTTo at the moment, and keeping the state for voltage output.
8. The method of claim 5, wherein the step-up signal is a steady voltage signal, the predetermined voltage control time value Tksj is obtained, and the step-up signal is passed through the step-up signal based on the predetermined voltage control time valueCalculating to obtain output voltage regulation rate value Vutk, then passingCalculating to obtain a switching tube conduction regulation and control adjustment time DTtk, wherein alpha is a conduction time influence coefficient, beta is a voltage change correction coefficient, and increasing the switching tube conduction time by DTtk;
acquiring a preset voltage regulation time value Tksj based on a stable voltage reduction signal by Calculating to obtain an output voltage regulation rate value Vutk;
By passing through Calculating to obtain the switching tube conduction regulation and control adjustment time DTtk, wherein alpha is a conduction time influence coefficient, beta is a voltage change correction coefficient, reducing DTtk the switching tube conduction time, maintaining the preset voltage regulation and control time Tksj to reduce the output voltage U e to a voltage stabilizing value Uwd, then raising DTtk the switching tube conduction time, and then maintaining the stable output voltage.
9. A wide-range regulated power supply voltage regulation control system for performing a wide-range regulated power supply voltage regulation control method as claimed in any one of claims 1 to 8, comprising:
The data acquisition module is used for dividing the monitoring period T by the unit time T, measuring the voltage value of each time point e and marking the voltage value as U e, wherein e is 1,2 and 3, and e is a positive integer;
the voltage deviation data comprises a voltage stabilizing value Uwd, a voltage deviation extreme value Ucj and an error signal threshold value Uwc;
The calculation mode of the standard positive voltage error integrated value Uzzb is as follows:
Obtaining a voltage stabilizing value Uwd, and obtaining a voltage deviation value Upcz e of each time point through Upcz e＝|Ue -Uwd |calculation, wherein the voltage stabilizing value Uwd represents a reference standard value of a circuit voltage stabilizing state;
Comparing the voltage deviation value Upcz e of each time point with the voltage deviation extremum Ucj to obtain the number of time points with the voltage deviation value Upcz e larger than the voltage deviation extremum Ucj, and marking as f;
By passing through Calculating to obtain a standard positive voltage error integrated value Uzzb;
the data processing module is used for comparing the standard positive voltage error integrated value Uzzb with the error signal threshold Uwc, generating a stable signal if the standard positive voltage error integrated value Uzzb is smaller than or equal to the error signal threshold Uwc, and generating an error signal if the standard positive voltage error integrated value Uzzb is larger than the error signal threshold Uwc;
The data judging module is used for calculating and obtaining the voltage change rate VU T at the end of the monitoring period T based on the error signal, judging the voltage value U e-1 at the e-1 time point and the output voltage U e at the end of the monitoring period T based on the voltage change rate VU T, generating a speed-reducing voltage-regulating signal if U e is larger than U e-1, generating an speed-increasing voltage-regulating signal if U e is smaller than U e-1, and generating a stable voltage-regulating signal if U e is equal to U e-1;
The signal processing module is used for adjusting the output voltage based on a control signal under a speed-reducing voltage-regulating signal to enable the change rate of the output voltage to be reduced to 0 and adjusting the output voltage to a voltage stabilizing value, adjusting the output voltage based on the control signal under the speed-reducing voltage-regulating signal to enable the change rate of the output voltage to be increased by 0 and adjusting the output voltage to the voltage stabilizing value because the change rate of the output voltage is in a reduced state, and adjusting the output voltage to the voltage stabilizing value Uwd and keeping the output voltage based on a stable voltage-regulating signal.
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| JP4725641B2 (en) * | 2008-12-17 | 2011-07-13 | 日本テキサス・インスツルメンツ株式会社 | Buck-boost switching regulator |
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| CN102237786A (en) * | 2010-04-22 | 2011-11-09 | 万国半导体(开曼)股份有限公司 | Power conversion system for reducing cross regulation effects and power control method |
| CN116707304A (en) * | 2023-03-09 | 2023-09-05 | 苏州浪潮智能科技有限公司 | A method, system, device and medium for optimizing a ripple control buck regulator |
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