CN114785119A - Output voltage regulating method of DCDC converter and related device - Google Patents

Output voltage regulating method of DCDC converter and related device Download PDF

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Publication number
CN114785119A
CN114785119A CN202210304572.3A CN202210304572A CN114785119A CN 114785119 A CN114785119 A CN 114785119A CN 202210304572 A CN202210304572 A CN 202210304572A CN 114785119 A CN114785119 A CN 114785119A
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value
dcdc converter
current
output voltage
voltage value
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石炼之
肖祖勋
刘鹏飞
吴壬华
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Shenzhen Shinry Technologies Co Ltd
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Shenzhen Shinry Technologies Co Ltd
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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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc

Abstract

The embodiment of the application provides an output voltage regulating method of a DCDC converter and a related device, wherein the method comprises the following steps: acquiring the current output current value of the DCDC converter; judging whether the current output current value is larger than a preset current threshold value or not; if the current output current value is larger than the preset current threshold value, determining a target output voltage value of the DCDC converter according to the current output current value and the parameter information of the DCDC converter; if the current output current value is smaller than or equal to the preset current threshold value, determining the required voltage value of the load as the target output voltage value of the DCDC converter; the current output voltage value of the DCDC converter is adjusted to the target output voltage value of the DCDC converter, and the current output voltage value can be determined according to the current output current of the DCDC converter, so that the output current of the DCDC converter can be automatically balanced, and the stability of the system is improved.

Description

Output voltage regulating method of DCDC converter and related device
Technical Field
The present application relates to the field of data processing technologies, and in particular, to an output voltage adjusting method for a DCDC converter and a related apparatus.
Background
Because the low-voltage load system in the vehicle has complex working conditions, instantaneous overcurrent working conditions such as continuous rotation of a steering wheel, ABS action and the like exist, and the DC/DC converter is required to have the capacity of bearing far excess rated output current in a short time.
For example, in the existing scheme, the rated capacity of the DCDC controller is 2kW, the rated output voltage is 14V, and the rated output current is 140A, but in the scenes of continuously rotating a steering wheel, ABS braking, and the like, the demand of the output current is greater than 140A within several seconds, and if the demand exceeds the rated output current of the DCDC controller, the system cannot stably operate, so that the stability of the system is poor.
Disclosure of Invention
The embodiment of the application provides an output voltage adjusting method and a related device of a DCDC converter, which can determine a current output voltage value according to a current output current of the DCDC converter, so that the output current of the DCDC converter can be automatically balanced, and the stability of a system is further improved.
A first aspect of an embodiment of the present application provides an output voltage regulating method of a DCDC converter, where the method includes:
acquiring the current output current value of the DCDC converter;
judging whether the current output current value is larger than a preset current threshold value or not; if the current output current value is larger than the preset current threshold value, determining a target output voltage value of the DCDC converter according to the current output current value and the parameter information of the DCDC converter;
if the current output current value is smaller than or equal to the preset current threshold value, determining the required voltage value of the load as a target output voltage value of the DCDC converter;
adjusting a current output voltage value of the DCDC converter to a target output voltage value of the DCDC converter.
In one possible implementation manner, the parameter information includes: the determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter includes:
acquiring a first difference value between a peak output current value of the DCDC converter and the current output current value;
acquiring a second difference value between the peak output current value and the rated output current value;
and determining a target output voltage value of the DCDC converter according to the first difference value, the second difference value, the lowest output voltage value and the required voltage value of the load.
In one possible implementation manner, the parameter information includes: the determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter includes:
obtaining a target output voltage value of the DCDC converter by a method shown in the following formula:
Figure BDA0003566651960000021
vset is a target output voltage value of the DCDC converter, Imax is a peak output current value, and IrefVmin is the lowest output voltage value, vsecan is the required voltage value of the load, and Io is the current output current value.
In one possible implementation manner, the adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter when the current output current value is greater than the preset current threshold includes:
acquiring an absolute value of a difference value between the target output voltage value and a loop target output voltage value;
determining an adjusting step length for adjusting the current output voltage value of the DCDC converter to the target output voltage value according to the absolute value and a preset absolute value threshold interval;
and adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter according to the adjustment step length.
In one possible implementation manner, the adjusting the present output voltage value of the DCDC converter to the target output voltage value of the DCDC converter when the present output current value is less than or equal to the preset current threshold includes:
acquiring a preset adjusting step length;
and adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter according to the preset adjustment step length.
A second aspect of an embodiment of the present application provides an output voltage regulating apparatus of a DCDC converter, the apparatus including:
the acquiring unit is used for acquiring the current output current value of the DCDC converter;
the judging unit is used for judging whether the current output current value is larger than a preset current threshold value or not;
a first determining unit, configured to determine a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter if the current output current value is greater than the preset current threshold;
a second determining unit, configured to determine, if the current output current value is less than or equal to the preset current threshold, that a required voltage value of a load is a target output voltage value of the DCDC converter;
and the adjusting unit is used for adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter.
In one possible implementation manner, the parameter information includes: a peak output current value of the DCDC converter, a rated output current value of the DCDC converter, a lowest output voltage value of the DCDC converter, and a required voltage value of a load, the first determining unit including:
the first obtaining module is used for obtaining a first difference value between a peak value output current value of the DCDC converter and the current output current value;
the second acquisition module is used for acquiring a second difference value between the peak output current value and the rated output current value;
and the first determining module is used for determining a target output voltage value of the DCDC converter according to the first difference value, the second difference value, the lowest output voltage value and the required voltage value of the load.
In one possible implementation manner, the parameter information includes: in the aspect of determining the target output voltage value of the DCDC converter according to the current output current value and the parameter information of the DCDC converter, the first determining unit is configured to:
obtaining a target output voltage value of the DCDC converter by a method shown in the following formula:
Figure BDA0003566651960000041
where Vset is the target output voltage value, Imax is the peak output current value, IrefFor the rated output current value, Vmin is the lowest output voltage value, Vsetcan is the required voltage value of the load, and Io is the current output current value.
In one possible implementation manner, the current output current value is greater than the preset current threshold, and the adjusting unit includes:
the third acquisition module is used for acquiring an absolute value of a difference value between the target output voltage value and the loop target output voltage value;
the second determining module is used for determining an adjusting step length for adjusting the current output voltage value of the DCDC converter to the target output voltage value according to the absolute value and a preset absolute value threshold interval;
and the first adjusting module is used for adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter according to the adjusting step length.
In one possible implementation manner, the current output current value is less than or equal to the preset current threshold, and the adjusting unit includes:
the fourth acquisition module is used for acquiring a preset adjustment step length;
and the second adjusting module is used for adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter according to the preset adjusting step length.
A third aspect of the embodiments of the present application provides a terminal, including a processor, an input device, an output device, and a memory, where the processor, the input device, the output device, and the memory are connected to each other, where the memory is used to store a computer program, and the computer program includes program instructions, and the processor is configured to call the program instructions to execute the step instructions in the first aspect of the embodiments of the present application.
A fourth aspect of embodiments of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform some or all of the steps as described in the first aspect of embodiments of the present application.
A fifth aspect of embodiments of the present application provides a computer program product, wherein the computer program product comprises a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps as described in the first aspect of embodiments of the present application. The computer program product may be a software installation package.
The embodiment of the application has at least the following beneficial effects:
obtaining the current output current value of the DCDC converter; judging whether the current output current value is larger than a preset current threshold value, if so, determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter, and if not, determining a required voltage value of a load as the target output voltage value of the DCDC converter, and adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter, so that the output voltage of the DCDC converter is adjusted in time when the current output current of the DCDC converter jumps, thereby automatically balancing the output current of the DCDC converter, and further improving the stability of a system where the DCDC converter is located.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a DCDC converter system according to an embodiment of the present application;
fig. 2A is a schematic flowchart of an output voltage regulating method of a DCDC converter according to an embodiment of the present application;
fig. 2B is a schematic flowchart of another output voltage regulating method of the DCDC converter according to the embodiment of the present application;
fig. 3 is a schematic flowchart of another output voltage regulating method of a DCDC converter according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an output voltage regulating device of a DCDC converter according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a first determining unit 503 according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an adjusting unit 505 according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of another adjusting unit 505 according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The terms "first," "second," and the like in the description and claims of the present application and in the foregoing drawings are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In order to better understand the output voltage adjusting method of the DCDC converter provided in the embodiments of the present application, a brief description will be given below of a DCDC converter system to which the output voltage adjusting method of the DCDC converter is applied. Referring to fig. 1, fig. 1 is a schematic diagram of a DCDC converter system according to an embodiment of the present disclosure. As shown in fig. 1, the DCDC converter system includes a high voltage power supply, a DCDC converter, a storage battery, a switch SW, and a low voltage load, wherein an output terminal of the high voltage power supply is connected to an input terminal of the DCDC converter, an anode of an output terminal of the DCDC converter is connected to an anode of the storage battery and a first terminal of the switch SW, a cathode of the output terminal of the DCDC converter is connected to a cathode of the storage battery and a first terminal of the low voltage load, and a second terminal of the switch SW is connected to a second terminal of the low voltage load. The output of the system is a mixed load composed of the storage battery and a low-voltage load. When the current demand of the low-voltage load is increased or reduced, the output current of the DCDC converter can be increased or reduced.
Referring to fig. 2A, fig. 2A is a schematic flowchart illustrating an output voltage adjusting method of a DCDC converter according to an embodiment of the present disclosure. As shown in fig. 2A, the method may be applied to a DCDC converter, a controller of the DCDC converter, or the like, and includes:
201. and acquiring the current output current value of the DCDC converter.
The present output current value may be acquired by a current detection sensor. The present output current value is associated with a low voltage load.
202. And judging whether the current output current value is larger than a preset current threshold value or not.
Wherein the preset current threshold may be a rated output current value of the DCDC converter.
203. And if the current output current value is larger than the preset current threshold value, determining a target output voltage value of the DCDC converter according to the current output current value and the parameter information of the DCDC converter.
The parameter information of the DCDC converter comprises a peak output current value of the DCDC converter, a rated output current value of the DCDC converter, a minimum output voltage value of the DCDC converter and a required voltage value of a load. The lowest output voltage value of the DCDC converter can be understood as the lowest operating voltage of the low-voltage load. The low voltage load may operate at a voltage lower than its rated voltage, and the lowest operating voltage may be lower than its rated voltage.
Of course, the peak output current value of the DCDC converter may be understood as the highest value of the output current of the DCDC converter, which may be larger than the peak output current value of the DCDC converter.
204. And if the current output current value is smaller than or equal to the preset current threshold value, determining the required voltage value of the load as the target output voltage value of the DCDC converter.
The required voltage value of the load may be understood as a voltage value required for the load to be able to operate normally. Specifically, it can be understood that if the current output current value is less than or equal to the preset current threshold, the current output current of the DCDC converter can meet the working requirement of the load, that is, the DCDC converter can bear the current voltage and the current for a long time, and the required voltage value of the load is the same as the target output voltage value of the DCDC converter.
205. Adjusting the current output voltage value of the DCDC converter to a target output voltage value of the DCDC converter.
The voltage regulation step length between the current output voltage value and the target output voltage value can be obtained, and the current output voltage value of the DCDC converter is regulated to the target output voltage value according to the voltage regulation step length. Specifically, for example, the current output voltage value may be adjusted multiple times according to the adjustment step length to obtain the target output voltage value.
In this example, by obtaining the current output current value of the DCDC converter, it is determined whether the current output current value is greater than a preset current threshold value, and if the current output current value is greater than the preset current threshold value, determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter, adjusting the current output voltage value of the DCDC converter to the target output voltage value, the target output voltage value may be determined based on the present output current value of the DCDC converter and the parameter information of the DCDC converter, therefore, when the current output current of the DCDC converter jumps, the target output voltage value of the DCDC converter is determined to be controlled by utilizing the current output current in time, and the storage battery can share more load current along with the reduction of the output voltage, so that the effect of indirectly controlling the output current of the DCDC converter is achieved.
In one possible implementation, the parameter information includes: a possible method of determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter includes:
a1, acquiring a first difference value between the peak output current value of the DCDC converter and the current output current value;
a2, acquiring a second difference value between the peak output current value and the rated output current value;
and A3, determining a target output voltage value of the DCDC converter according to the first difference value, the second difference value, the lowest output voltage value and the required voltage value of the load.
The first difference, the second difference, the lowest output voltage value, and the required voltage value of the load may be subjected to product, sum, and the like, so as to obtain a target output voltage value of the DCDC converter. Specifically, the target output voltage value may be determined by a method shown in the following formula:
Figure BDA0003566651960000082
where Vset is the target output voltage, a1 is the first difference, a2 is the second difference, Vmin is the lowest output voltage, and Vsetcan is the required voltage of the load. Vsetcan can be understood as the output voltage value normally demanded by the load.
In this example, the target output voltage is determined by a first difference between the peak output current value and the current output current value, a second difference between the peak output current value and the rated output current value, and the lowest output voltage, so that the target output voltage can be determined from the current perspective, and the accuracy in determining the target output voltage is improved.
In one possible implementation, the parameter information includes: another possible method for determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter includes:
obtaining a target output voltage value of the DCDC converter by a method shown in the following formula:
Figure BDA0003566651960000081
where Vset is the target output voltage value, Imax is the peak output current value, IrefFor the rated output current value, Vmin is the lowest output voltage value, Vsetcan is the required voltage value of the load, and Io is the current output current value.
In a possible implementation manner, if the current output current value is greater than the preset current threshold, a possible method for adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter includes:
b1, acquiring the absolute value of the difference between the target output voltage value and the loop target output voltage value;
b2, determining an adjusting step length for adjusting the current output voltage value of the DCDC converter to the target output voltage value according to the absolute value and a preset absolute value threshold interval;
and B3, adjusting the current output voltage value of the DCDC converter to the target output voltage value according to the adjustment step length.
And the loop target output voltage value is the input quantity of the voltage loop controller.
The preset absolute value threshold interval comprises a plurality of sub-intervals, and each sub-interval corresponds to a different adjusting step length.
The method for determining the adjustment step length for adjusting the current output voltage value of the DCDC converter to the target output voltage value according to the absolute value and a preset absolute value threshold interval may be:
judging whether the difference value between the target output voltage value and the loop target output voltage value is smaller than zero or not;
if the difference is smaller than zero, determining a corresponding subinterval of the absolute value of the difference in a first preset absolute value threshold interval, and determining the step length corresponding to the subinterval as an adjustment step length;
if the difference is greater than zero, determining a corresponding subinterval of the absolute value of the difference in a second preset absolute value threshold interval, and determining the step length corresponding to the subinterval as the adjustment step length.
The number of subintervals in the first preset absolute value threshold interval and the second preset absolute value threshold interval is different, and the adjustment step lengths corresponding to the subintervals can be the same or different.
For example, the first preset absolute value threshold interval includes 4 sub-intervals, and the first sub-interval, the second sub-interval, the third sub-interval, and the fourth sub-interval may be specifically expressed as: the first subinterval is: (first threshold, second threshold), the second subinterval being: (second threshold, third threshold); the third subinterval is: and the fourth subinterval is greater than the third threshold: (0, first threshold). The first threshold is smaller than the second threshold, the second threshold is smaller than the third threshold, and the thresholds are set through experience values or historical data. The adjusting step length corresponding to the first subinterval is smaller than that corresponding to the second subinterval, the adjusting step length corresponding to the second subinterval is smaller than that corresponding to the third subinterval, and the adjusting step length of the fourth subinterval is a preset fixed step length.
The second preset absolute value threshold interval includes 3 sub-intervals, and the first sub-interval, the second sub-interval, and the third sub-interval may be specifically expressed as: the first subinterval is: (first threshold, second threshold), the second subinterval being: (second threshold, third threshold); the third subinterval is: (0, first threshold). The first threshold is smaller than the second threshold, the second threshold is smaller than the third threshold, and the thresholds are set through experience values or historical data. The step lengths corresponding to the first, second and fourth subintervals of the first preset absolute value threshold interval may be the same as the step lengths between the intervals corresponding to the first, second and third subintervals in the second preset absolute value threshold interval. For example, the adjustment step corresponding to the first sub-interval of the first preset absolute value threshold interval is equal to the adjustment step corresponding to the first sub-interval of the second preset absolute value threshold interval. Different regulating speeds correspond to different regulating steps, so that different regulating steps can be set according to an absolute value threshold interval corresponding to the absolute value of the difference between the target output voltage value and the loop target output voltage value, the voltage balance between the DC/DC converter and the storage battery can be stably realized, and the adaptability during voltage regulation can be improved.
In one possible implementation, if the present output current value is less than or equal to the preset current threshold, a possible method for adjusting the present output voltage value of the DCDC converter to the target output voltage value of the DCDC converter includes:
c1, acquiring a preset adjusting step length;
and C2, adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter according to the preset adjustment step length.
The target output voltage value is a target output voltage value determined when the current output current value is less than or equal to the preset current threshold value, and the target output voltage value is a required voltage value of the load.
The preset adjustment step length can be set through empirical values or historical data. Reference may be made to the adjustment step length corresponding to the absolute threshold interval preset in the foregoing embodiment. For example, the adjustment step size corresponding to the second sub-interval in the first preset absolute value threshold interval may be used.
In a specific embodiment, when the current output voltage value of the DCDC converter is adjusted to the target output voltage value, specifically, the current output voltage value may be: the adjustment can be performed for multiple times according to the adjustment step length, and after each adjustment, the adjusted output voltage value can be determined as the current output voltage value to be adjusted again until the current output voltage value is adjusted to the target output voltage value. For example, a Pulse Width Modulation (PWM) signal may be assigned through an output of the voltage loop controller, so as to control a switching tube in the DCDC converter according to the PWM signal, so as to implement voltage adjustment according to an adjustment step size. The input of the voltage loop controller may be an adjustment value determined according to the current output voltage value and the adjustment step size, and the output value may be a parameter for assigning the PWM.
In a specific embodiment, the present application provides a specific output voltage adjusting method of a DCDC converter, as shown in fig. 2B, the output current of the DCDC topology is subjected to hardware low-pass filtering to obtain a current output current value, whether the current output current value is greater than an output current threshold (a preset current threshold) is determined, and if the current output current value is greater than the output current threshold, the voltage may be reduced according to a linear relationship to obtain a target output voltage value Vset of the DCDC converter. The linear relation step-down may be step-down according to the current output current value and parameter information of the DCDC converter to obtain a target output voltage value Vset of the DCDC converter. If the current output current value is smaller than the output current threshold value, the required voltage value Vsetcan of the load is determined as the target output voltage value Vset of the DCDC converter. The loop target output voltage value Vref is adjusted to the target output voltage value Vset of the DCDC converter by the variable step soft-up strategy, which may refer to the method of adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter in the foregoing embodiments. The voltage loop controller obtains the output of the voltage loop controller according to the loop target output voltage value vref, and then assigns a Pulse Width Modulation (PWM) signal through the output of the voltage loop controller, so that a switching tube in the DCDC converter is controlled according to the PWM signal, and the voltage is adjusted.
Referring to fig. 3, fig. 3 is a schematic flowchart illustrating another output voltage regulating method of a DCDC converter according to an embodiment of the present disclosure. As shown in fig. 3, the method may be applied to a DCDC converter, a controller of the DCDC converter, and the like, and includes:
301. acquiring the current output current value of the DCDC converter;
302. judging whether the current output current value is larger than a preset current threshold value or not;
303. if the current output current value is larger than the preset current threshold value, acquiring a first difference value between the peak output current value of the DCDC converter and the current output current value;
304. obtaining a second difference value between the peak output current value and the rated output current value;
305. determining a target output voltage value of the DCDC converter according to the first difference value, the second difference value, the lowest output voltage value and a required voltage value of the load;
the lowest output voltage value of the DCDC converter can be understood as the lowest operating voltage of the low-voltage load. The low voltage load may operate at a voltage lower than its rated voltage, and the lowest operating voltage may be lower than its rated voltage.
306. If the current output current value is smaller than or equal to the preset current threshold value, determining the required voltage value of the load as a target output voltage value of the DCDC converter;
307. adjusting the current output voltage value of the DCDC converter to a target output voltage value of the DCDC converter.
In this example, the target output voltage is determined by the first difference between the peak output current value and the current output current value, the second difference between the peak output current value and the rated output current value, and the lowest output voltage, so that the target output voltage can be determined from the current perspective, the voltage balance between the DCDC converter and the storage battery is realized, and all load currents of the low-voltage load system are stably provided together.
In accordance with the foregoing embodiments, please refer to fig. 4, fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present application, and as shown in the drawing, the terminal includes a processor, an input device, an output device, and a memory, where the processor, the input device, the output device, and the memory are connected to each other, where the memory is used to store a computer program, the computer program includes program instructions, the processor is configured to call the program instructions, and the program includes instructions for executing the following steps;
acquiring the current output current value of the DCDC converter;
judging whether the current output current value is larger than a preset current threshold value or not;
if the current output current value is larger than the preset current threshold value, determining a target output voltage value of the DCDC converter according to the current output current value and the parameter information of the DCDC converter;
if the current output current value is smaller than or equal to the preset current threshold value, determining the required voltage value of the load as a target output voltage value of the DCDC converter;
adjusting a current output voltage value of the DCDC converter to a target output voltage value of the DCDC converter.
The above description has introduced the solution of the embodiment of the present application mainly from the perspective of the method-side implementation process. It is understood that the terminal includes corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above-described functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments provided herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed in hardware or computer software drives hardware 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 application.
In the embodiment of the present application, the terminal may be divided into the functional units according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
In accordance with the above, referring to fig. 5, fig. 5 is a schematic diagram of an output voltage regulator of a DCDC converter according to an embodiment of the present application. As shown in fig. 5, the apparatus includes:
an obtaining unit 501, configured to obtain a current output current value of the DCDC converter;
a determining unit 502, configured to determine whether the current output current value is greater than a preset current threshold;
a first determining unit 503, configured to determine a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter if the current output current value is greater than the preset current threshold;
a second determining unit 504, configured to determine, if the current output current value is smaller than or equal to the preset current threshold, a required voltage value of a load as a target output voltage value of the DCDC converter;
an adjusting unit 505, configured to adjust a current output voltage value of the DCDC converter to a target output voltage value of the DCDC converter.
In one possible implementation manner, the parameter information includes: as shown in fig. 6, the first determining unit 503 includes:
a first obtaining module 5031, configured to obtain a first difference between a peak output current value of the DCDC converter and the current output current value;
a second obtaining module 5032, configured to obtain a second difference between the peak output current value and the rated output current value;
a first determining module 5033, configured to determine a target output voltage value of the DCDC converter according to the first difference, the second difference, the lowest output voltage value, and the required voltage value of the load.
In one possible implementation, the parameter information includes: in the aspect of determining the target output voltage value of the DCDC converter according to the current output current value and the parameter information of the DCDC converter, the first determining unit 503 is configured to:
obtaining a target output voltage value of the DCDC converter by a method shown in the following formula:
Figure BDA0003566651960000131
where Vset is the target output voltage value, Imax is the peak output current value, IrefFor the rated output current value, Vmin is the lowest output voltage value, Vsetcan is the required voltage value of the load, and Io is the current output current value.
In a possible implementation manner, the present output current value is greater than the preset current threshold, as shown in fig. 7, the adjusting unit 505 includes:
a third obtaining module 5051, configured to obtain an absolute value of a difference between the target output voltage value and a loop target output voltage value;
a second determining module 5052, configured to determine, according to the absolute value and a preset absolute value threshold interval, an adjusting step length for adjusting the current output voltage value of the DCDC converter to the target output voltage value;
a first adjusting module 5053, configured to adjust the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter according to the adjusting step size.
In a possible implementation manner, the present output current value is less than or equal to the preset current threshold, as shown in fig. 8, the adjusting unit 505 includes:
a fourth obtaining module 5054, configured to obtain a preset adjustment step size;
a second adjusting module 5055 is configured to adjust the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter according to the preset adjusting step size.
Embodiments of the present application also provide a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables a computer to execute part or all of the steps of any one of the methods for regulating an output voltage of a DCDC converter as described in the above method embodiments.
Embodiments of the present application also provide a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program causes a computer to execute some or all of the steps of any one of the methods for regulating an output voltage of a DCDC converter as described in the above method embodiments.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some interfaces, indirect coupling or communication connection between devices or units, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module.
The integrated units, if implemented in the form of software program modules and sold or used as stand-alone products, may be stored in a computer readable memory. Based on such understanding, the technical solutions of the present application, in essence or part of the technical solutions contributing to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product, which is stored in a memory and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned memory comprises: various media capable of storing program codes, such as a usb disk, a read-only memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and the like.
Those skilled in the art will appreciate that all or part of the steps of the methods of the above embodiments may be implemented by a program, which is stored in a computer-readable memory, the memory including: flash memory disks, read-only memory, random access memory, magnetic or optical disks, and the like.
The foregoing embodiments have been described in detail, and specific examples are used herein to explain the principles and implementations of the present application, where the above description of the embodiments is only intended to help understand the method and its core ideas of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims (10)

1. A method of output voltage regulation of a DCDC converter, the method comprising:
acquiring the current output current value of the DCDC converter;
judging whether the current output current value is larger than a preset current threshold value or not; if the current output current value is larger than the preset current threshold value, determining a target output voltage value of the DCDC converter according to the current output current value and the parameter information of the DCDC converter;
if the current output current value is smaller than or equal to the preset current threshold value, determining the required voltage value of the load as a target output voltage value of the DCDC converter;
adjusting the current output voltage value of the DCDC converter to a target output voltage value of the DCDC converter.
2. The method of claim 1, wherein the parameter information comprises: the determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter includes:
acquiring a first difference value between a peak output current value of the DCDC converter and the current output current value;
acquiring a second difference value between the peak output current value and the rated output current value;
and determining a target output voltage value of the DCDC converter according to the first difference value, the second difference value, the lowest output voltage value and the required voltage value of the load.
3. The method of claim 1, wherein the parameter information comprises: the determining a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter includes:
obtaining a target output voltage value of the DCDC converter by a method shown in the following formula:
Figure FDA0003566651950000011
vset is a target output voltage value of the DCDC converter, Imax is a peak output current value, and IrefFor the rated output current value, Vmin is the lowest output voltage value, Vsetcan is the required voltage value of the load, and Io is the current output current value.
4. The method according to any one of claims 1 to 3, wherein the current output current value is greater than the preset current threshold, and the adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter comprises:
acquiring an absolute value of a difference value between the target output voltage value and a loop target output voltage value;
determining an adjusting step length for adjusting the current output voltage value of the DCDC converter to the target output voltage value according to the absolute value and a preset absolute value threshold interval;
and adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter according to the adjustment step length.
5. The method according to any one of claims 1 to 3, wherein the current output current value is less than or equal to the preset current threshold, and the adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter comprises:
acquiring a preset adjusting step length;
and adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter according to the preset adjustment step length.
6. An output voltage regulating apparatus of a DCDC converter, the apparatus comprising:
the acquiring unit is used for acquiring the current output current value of the DCDC converter;
the judging unit is used for judging whether the current output current value is larger than a preset current threshold value or not;
a first determining unit, configured to determine a target output voltage value of the DCDC converter according to the current output current value and parameter information of the DCDC converter if the current output current value is greater than the preset current threshold;
a second determining unit, configured to determine, if the current output current value is smaller than or equal to the preset current threshold, that a required voltage value of a load is a target output voltage value of the DCDC converter;
and the adjusting unit is used for adjusting the current output voltage value of the DCDC converter to the target output voltage value of the DCDC converter.
7. The apparatus of claim 6, wherein the parameter information comprises: a peak output current value of the DCDC converter, a rated output current value of the DCDC converter, a lowest output voltage value of the DCDC converter, and a required voltage value of a load, the first determining unit including:
the first acquisition module is used for acquiring a first difference value between a peak output current value of the DCDC converter and the current output current value;
the second acquisition module is used for acquiring a second difference value between the peak output current value and the rated output current value;
and the first determining module is used for determining a target output voltage value of the DCDC converter according to the first difference value, the second difference value, the lowest output voltage value and the required voltage value of the load.
8. The apparatus of claim 6, wherein the parameter information comprises: the peak output current value of the DCDC converter, the rated output current value of the DCDC converter, the lowest output voltage value of the DCDC converter, and the required voltage value of the load, wherein the first determination unit is configured to:
obtaining the target output voltage value by a method shown by the following formula:
Figure FDA0003566651950000031
vset is a target output voltage value of the DCDC converter, Imax is a peak output current value, and IrefVmin is the lowest output voltage value, vsecan is the required voltage value of the load, and Io is the current output current value.
9. A terminal, characterized in that it comprises a processor, an input device, an output device and a memory, said processor, input device, output device and memory being interconnected, wherein said memory is used to store a computer program comprising program instructions, said processor being configured to invoke said program instructions to perform the method according to any of the claims 1-5.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to carry out the method according to any one of claims 1-5.
CN202210304572.3A 2022-03-26 2022-03-26 Output voltage regulating method of DCDC converter and related device Pending CN114785119A (en)

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