CN111740607B - Circuit control device - Google Patents
Circuit control device Download PDFInfo
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- CN111740607B CN111740607B CN202010604491.6A CN202010604491A CN111740607B CN 111740607 B CN111740607 B CN 111740607B CN 202010604491 A CN202010604491 A CN 202010604491A CN 111740607 B CN111740607 B CN 111740607B
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The application discloses two kinds of circuit control devices, be favorable to preventing its overcurrent when controlled circuit output short circuit. One of them includes: a data acquisition module for acquiring output current; a current loop module for constructing a current loop and outputting a current loop output; and the integral adjustment module is used for controlling the current loop output quantity to be reduced from the current value cliff to another value when the output current is larger than the current threshold value. The two components comprise: a data acquisition module for acquiring output current; a current loop module for constructing a current loop and outputting a current loop output; a voltage loop module for constructing a voltage loop and outputting the output quantity of the voltage loop; a selector for selecting one of the voltage loop output and the current loop output as a control value output based on the magnitude relation of the voltage loop output and the current loop output; when the output current is larger than the current threshold value, the current loop integrating part is adjusted to enable the selector to select the current loop output quantity as the integrating adjusting module of the control quantity; and a control module for controlling the controlled circuit based on the control amount.
Description
Technical Field
The present application relates to the field of circuit control, and in particular, to a circuit control device.
Background
With the development of scientific technology, current loops and voltage loops are increasingly widely used. In the prior art, a controlled circuit (such as an LLC resonant circuit) is often controlled through a current loop and a voltage loop, so that the output current of the controlled circuit is prevented from flowing through the controlled circuit.
The defects of the prior art are that: under the condition that the controlled circuit is controlled by the current loop, when the output port of the controlled circuit is suddenly short-circuited, the current loop is low in adjusting response speed, the output current of the controlled circuit cannot be limited in time, and the controlled circuit is easy to overflow; under the condition that the controlled circuit is controlled by the parallel competition of the voltage ring and the current ring, when the system is normally loaded, the output gain value corresponding to the voltage ring is smaller than the output gain value of the current ring, the current ring is saturated, when the output port of the controlled circuit is suddenly short-circuited, the current ring is slow in integration withdrawal speed, the voltage ring and the current ring compete, the current ring cannot work, the current ring cannot control the output current of the controlled circuit in time, and the controlled circuit is easy to overflow.
Disclosure of Invention
The circuit control device is beneficial to limiting the output current of the controlled circuit in time through the current loop when the output port of the controlled circuit is short-circuited, and preventing the controlled circuit from overcurrent.
In order to achieve the above technical effects, a first aspect of the present application provides a circuit control device applied to a controlled circuit, the circuit control device including:
the data acquisition module is used for acquiring the output current of the controlled circuit;
the current loop module is used for constructing a current loop and outputting current loop output quantity, wherein the current loop comprises an integrating part;
the control module is used for controlling the controlled circuit based on the current loop output quantity;
and the integral adjustment module is used for controlling the integral part of the current loop to be reduced from the current value cliff to another value when the output current is larger than a preset current threshold value.
Optionally, the integral adjustment module is specifically configured to: when the output current is larger than a preset current threshold value, controlling the integrating part of the current loop to be reduced to half of the current value from the current value cliff.
Optionally, the circuit control device further comprises a voltage loop module and a selector;
the voltage loop module is used for constructing a voltage loop and outputting a voltage loop output quantity;
the selector is used for selecting the output with smaller corresponding output gain from the voltage loop output quantity and the current loop output quantity as control quantity output;
the control module is specifically used for: and controlling the controlled circuit based on the control amount.
Optionally, the circuit control device further includes a filtering module, where the filtering module is connected between the controlled circuit and the data acquisition module, and is configured to filter an output current of the controlled circuit;
the data acquisition module is specifically used for acquiring the output current filtered by the filtering module.
Optionally, the controlled circuit is an LLC resonant circuit;
the data acquisition module is connected with an output port of the LLC resonance module;
the control module is connected with a driving pin of a switching tube of the LLC resonant circuit;
the control module is specifically used for: and controlling a driving pin of a switching tube of the LLC resonant circuit based on the control quantity.
A second aspect of the present application provides a circuit control device applied to a controlled circuit, the circuit control device including:
the data acquisition module is used for acquiring the output current of the controlled circuit;
the current loop module is used for constructing a current loop and outputting current loop output quantity, wherein the current loop comprises an integrating part;
the voltage loop module is used for constructing a voltage loop and outputting a voltage loop output quantity;
a selector configured to select one of the voltage loop output and the current loop output as a control amount based on a magnitude relation between the voltage loop output and the current loop output;
an integral adjustment module for adjusting an integral part of the current loop when the output current is greater than a preset current threshold value, so that the selector selects the current loop output quantity as a control quantity output;
and the control module is used for controlling the controlled circuit based on the control quantity.
Optionally, the selector is specifically configured to: selecting the smaller corresponding output gain from the voltage loop output quantity and the current loop output quantity as a control quantity output;
the integral adjustment module is specifically configured to: when the output current is greater than a preset current threshold, the integrating part of the current loop is controlled to change from a current value to another value, so that the selector selects the current loop output quantity as a control quantity output.
Optionally, the circuit control device further includes a filtering module, where the filtering module is connected between the controlled circuit and the data acquisition module, and filters an output current of the controlled circuit;
the data acquisition module is specifically used for acquiring the output current filtered by the filtering module.
Optionally, the controlled circuit is an LLC resonant circuit;
the data acquisition module is connected with an output port of the LLC resonance module;
the control module is connected with a driving pin of a switching tube of the LLC resonant circuit;
the control module is specifically used for: and controlling a driving pin of a switching tube of the LLC resonant circuit based on the control quantity.
Optionally, the data acquisition module is specifically configured to: and sampling the output current of the controlled circuit based on a preset sampling frequency.
As can be seen from the above, the first circuit control device provided in the present application controls the controlled circuit based on the current loop: when the output current is larger than a preset current threshold value, controlling the integration part of the current loop to be reduced to another value from the current value cliff through the integration adjustment module; therefore, the method is beneficial to shortening the time required by current loop integration, improving the response speed of the current loop, and achieving the technical effects of limiting the output current of the controlled circuit in time and preventing the controlled circuit from overcurrent.
The second circuit control device provided by the application controls the controlled circuit based on the voltage ring and the current ring: when the output current is larger than a preset current threshold value, the integrating adjustment module adjusts the integrating part of the current loop, so that the selector selects the output quantity of the current loop as the control quantity to be output; thereby being beneficial to the control function of the current loop and achieving the technical effects of limiting the output current of the controlled circuit in time and preventing the controlled circuit from overcurrent.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a circuit control device according to a first embodiment of the present disclosure;
FIG. 2 is a logic diagram of parallel control of current loop and voltage loop according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an LLC resonant circuit according to an embodiment of the present application;
fig. 4 is a schematic diagram of a circuit control device according to a second embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
As used in this specification and the appended claims, the term "if" may be interpreted in context as "when …" or "upon" or "in response to a determination" or "in response to detection. Similarly, the phrase "if a condition or event described is determined" or "if a condition or event described is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a condition or event described" or "in response to detection of a condition or event described".
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Throughout the embodiments of the present application, the same or similar reference numerals denote the same or similar modules or modules having the same or similar functions. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the present invention, the meaning of "plurality" means two or more, unless specifically defined otherwise.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.
Example 1
An embodiment of the present invention provides a circuit control device, which is applied to a controlled circuit, as shown in fig. 1, and includes:
the data acquisition module 101 is configured to acquire an output current of the controlled circuit.
Alternatively, the controlled circuit may be an LLC resonant circuit, or may be another circuit that can be controlled by using a current loop, which is not specifically limited herein.
A current loop module 102 for constructing a current loop and outputting a current loop output, wherein the current loop includes an integrating part.
And a control module 103 for controlling the controlled circuit based on the current loop output.
The integral adjustment module 104 is configured to control the integral of the current loop to decrease from the current value to another value when the output current is greater than a preset current threshold.
Optionally, the integral adjustment module 104 is specifically configured to: when the output current is larger than a preset current threshold value, the integrating part of the current loop is controlled to be reduced to half of the current value from the current value cliff, so that the reaction speed of the current loop is ensured to be fast enough, and the controlled circuit is prevented from being burnt out due to the fact that the output current of the controlled circuit is too high. Wherein the cliff reduction is specifically: greatly reduced or reduced according to a preset proportion. In this embodiment, the integral adjustment module 104 is specifically configured to: when the output current is greater than a preset current threshold, the integrating part of the current loop is set to be the product of the current value and a preset proportion, wherein the value of the preset proportion is greater than 0 and not less than 0.7. Preferably, the predetermined ratio is 0.5.
In this embodiment, the current loop module 102 constructs a current loop through computer software, so the integral adjustment module 104 may send an integral control command to the computer software to adjust an integral part of the current loop.
Optionally, the current threshold is greater than a value of a current limit point of the controlled circuit (e.g., a value obtained by floating the current limit point of the controlled circuit by 1% -5% is set as the current threshold). Because the current limiting point of the controlled circuit is usually smaller than the maximum output current which can be born by the controlled circuit, the current threshold is set to be larger than the current limiting point of the controlled circuit, so that erroneous judgment caused by fluctuation of the output current of the controlled circuit in a small range can be avoided under the condition that the safety of the controlled circuit is ensured. Of course, the value of the current threshold may also be adjusted according to the type and specific parameters of the controlled circuit, which is not limited herein.
Optionally, the circuit control device further includes a voltage ring module (not shown) and a selector (not shown). The voltage loop module is used for constructing a voltage loop and outputting a voltage loop output quantity; the selector is used for selecting the output with smaller corresponding output gain from the voltage loop output quantity and the current loop output quantity as control quantity output; the control module 103 specifically is configured to: and controlling the controlled circuit based on the control amount. In this embodiment, as shown in fig. 2, the current loop and the voltage loop compete in parallel for controlling the controlled circuit, where the output of the voltage loop and the output of the current loop are characterized by frequency values, and the larger the frequency value corresponding to the control quantity is, the smaller the output gain is, so the selector selects the larger one of the output of the voltage loop and the output of the current loop as the control quantity to output, so that the corresponding output gain is smaller.
Optionally, the circuit control device further includes a filtering module (not shown in the figure), which is connected between the controlled circuit and the data acquisition module 101, and is configured to filter an output current of the controlled circuit; the data acquisition module 101 is specifically configured to acquire the output current filtered by the filtering module, so as to reduce an error and avoid erroneous judgment due to fluctuation of the output current of the controlled circuit in a small range.
Optionally, the controlled circuit is an LLC resonant circuit; the data acquisition module 101 is connected with an output port of the LLC resonance module; the control module 103 is connected with a driving pin of a switching tube of the LLC resonant circuit; the control module 103 specifically is configured to: and controlling a driving pin of a switching tube of the LLC resonant circuit based on the control quantity.
As can be seen from the above, the circuit control device provided in the first embodiment of the present application includes: a data acquisition module 101 for acquiring an output current of the controlled circuit; a current loop module 102 for constructing a current loop and outputting a current loop output; a control module 103 for controlling the controlled circuit based on the current loop output; the integral adjustment module 104 is configured to control the integral of the current loop to decrease from the current value to another value when the output current is greater than a preset current threshold. The circuit control device controls the controlled circuit based on the current loop, and when the output current is greater than a preset current threshold value, the integration adjustment module 104 controls the integration part of the current loop to be reduced from the current value cliff to another value; therefore, the method is beneficial to shortening the time required by current loop integration, improving the response speed of the current loop, and achieving the technical effects of limiting the output current of the controlled circuit in time and preventing the controlled circuit from overcurrent.
The circuit control device in the first embodiment is further described below in a specific application scenario. In this application scenario, the controlled circuit mentioned in the first embodiment is specifically an LLC resonant circuit. A schematic diagram of the LLC resonant circuit can be seen in fig. 3. In the application scenario, the output current of the LLC resonant circuit is sampled by the data acquisition module 101 and is used as the input of the current loop module 102; constructing a current loop through the current loop module 102 and outputting a current loop output; the control module 103 is connected to a PWM signal generator, and determines, based on the current loop output, a frequency and a duty ratio of a PWM (Pulse width modulation ) signal for controlling the LLC resonant circuit, so that a PWM signal corresponding to the frequency and the duty ratio is generated by the PWM signal generator, and driving pins of a first switching tube Q1 and a second switching tube Q2 on a primary side in the LLC resonant circuit are controlled based on the PWM signal, respectively, to implement current limiting. In the first embodiment of the present application, the data acquisition module 101 may acquire the output current of the LLC resonant circuit in real time or periodically, and when the output port of the LLC resonant circuit is suddenly shorted, the output current increases. At this time, since the output current collected by the data collection module 101 is greater than the preset current threshold, the integral adjustment module 104 controls the integral part of the current loop to be reduced from the current value cliff to another value, so as to increase the reaction speed of the current loop, quickly change the frequency and the duty ratio of the PWM signal generated by the PWM signal generator, limit the output current of the LLC resonant circuit, and prevent the LLC resonant circuit from being burnt out due to overcurrent.
Example two
In a second embodiment of the present application, another circuit control device is provided and applied to a controlled circuit, as shown in fig. 3, where the circuit control device includes:
the data acquisition module 401 is configured to acquire an output current of the controlled circuit.
Alternatively, the controlled circuit may be an LLC resonant circuit, or may be another circuit that can be controlled by using a current loop, which is not specifically limited herein. The data acquisition module 401 is specifically configured to: and sampling the output current of the controlled circuit based on a preset sampling frequency.
A current loop module 402 for constructing a current loop and outputting a current loop output, wherein the current loop includes an integrating part.
The voltage ring module 403 is configured to construct a voltage ring and output a voltage ring output.
And a selector 404 configured to select one of the voltage loop output and the current loop output as a control amount based on a magnitude relation between the voltage loop output and the current loop output.
And an integral adjustment module 405, configured to adjust the integral part of the current loop so that the selector 404 selects the current loop output as the control value output when the output current is greater than a preset current threshold.
And a control module 406 for controlling the controlled circuit based on the control amount.
Optionally, the selector 404 is specifically configured to: selecting the smaller corresponding output gain from the voltage loop output quantity and the current loop output quantity as a control quantity output; the integral adjustment module 405 is specifically configured to: when the output current is greater than a preset current threshold, the integrating part of the current loop is controlled to be changed from the current value to another value, so that the selector 404 selects the current loop output quantity as the control quantity output. Specifically, when the output current is greater than the preset current threshold, the integral adjustment module 405 may select, based on the correspondence between the integral of the current loop and the current loop output, a target value that can make the output gain corresponding to the current loop output smaller than the output gain corresponding to the voltage loop output as the value of the integral of the current loop, so as to ensure that the current loop plays a role in controlling when the controlled circuit is short-circuited, so that the current loop timely controls the output current of the controlled circuit, and prevent the controlled circuit from being burnt out due to overcurrent.
In this embodiment, the current loop module 402 constructs a current loop through computer software, so the integral adjustment module 405 may send an integral control command to the computer software to adjust an integral part of the current loop.
Optionally, the current threshold is greater than a value of a current limit point of the controlled circuit (e.g., a value obtained by floating the current limit point of the controlled circuit by 1% -5% is set as the current threshold). Because the current limiting point of the controlled circuit is usually smaller than the maximum output current which can be born by the controlled circuit, the current threshold is set to be larger than the current limiting point of the controlled circuit, so that erroneous judgment caused by fluctuation of the output current of the controlled circuit in a small range can be avoided under the condition that the safety of the controlled circuit is ensured. Of course, the value of the current threshold may also be adjusted according to the type and specific parameters of the controlled circuit, which is not limited herein.
Optionally, the circuit control device further includes a filtering module (not shown in the figure), where the filtering module is connected between the controlled circuit and the data acquisition module 401, and is configured to filter an output current of the controlled circuit; the data acquisition module 401 is specifically configured to acquire the output current filtered by the filtering module, so as to reduce an error and avoid erroneous judgment due to fluctuation of the output current of the controlled circuit in a small range.
Optionally, the controlled circuit is an LLC resonant circuit; the data acquisition module 401 is connected with an output port of the LLC resonance module; the control module 406 is connected to a drive pin of a switching tube of the LLC resonant circuit; the control module 406 is specifically configured to: and controlling a driving pin of a switching tube of the LLC resonant circuit based on the control quantity.
As can be seen from the above, the circuit control device provided in the second embodiment of the present application includes: the data acquisition module 401 is used for acquiring the output current of the controlled circuit; a current loop module 402 for constructing a current loop and outputting a current loop output; a voltage ring module 403, configured to construct a voltage ring and output a voltage ring output; a selector 404 for selecting one of the voltage loop output quantity and the current loop output quantity as a control quantity output based on a magnitude relation of the voltage loop output quantity and the current loop output quantity; an integral adjustment module 405, configured to adjust an integral of the current loop when the output current is greater than a preset current threshold, so that the selector 404 selects the current loop output as the control amount output; a control module 406 for controlling the controlled circuit based on the control amount. The circuit control device controls the controlled circuit based on the current loop and the voltage loop, and when the output current is greater than a preset current threshold value, the integrating adjustment module 405 adjusts the integrating part of the current loop, so that the selector 404 selects the output quantity of the current loop as the control quantity to be output; thereby being beneficial to the control function of the current loop and achieving the technical effects of limiting the output current of the controlled circuit in time and preventing the controlled circuit from overcurrent.
The circuit control device in the second embodiment is further described below in a specific application scenario. In this application scenario, the controlled circuit mentioned in embodiment two is specifically an LLC resonant circuit. A schematic diagram of the LLC resonant circuit can be seen in fig. 3. In this application scenario, the data acquisition module 401 samples the output current of the LLC resonant circuit as the input of the current loop module 402, and samples the output voltage of the LLC resonant circuit as the input of the voltage loop module 403. Constructing a current loop through the current loop module 402 and outputting a current loop output; a voltage loop is built up by the voltage loop module 403 and a voltage loop output is output. The selector 404 outputs one of the voltage loop output and the current loop output as a control amount based on a magnitude relation between the voltage loop output and the current loop output. The control module 406 is connected to the PWM signal generator, and determines the frequency and the duty ratio of the PWM signal for controlling the LLC resonant circuit based on the control amount, so as to control the PWM signal generator to generate a PWM signal with a corresponding frequency and duty ratio, and controls the driving pins of the first switching tube Q1 and the second switching tube Q2 on the primary side in the LLC resonant circuit based on the PWM signal, so as to implement current limiting. When the output port of the LLC resonant circuit is suddenly shorted, its output current increases. At this time, since the output current collected by the data collection module 401 is greater than the preset current threshold, the integral adjustment module 405 adjusts the integral portion of the current loop, so that the selector 404 selects the current loop output quantity as the control quantity to output, thereby being beneficial to the control function of the current loop, and the control module 406 controls the frequency and the duty ratio of the PWM signal generated by the PWM signal generator based on the current loop output quantity, so as to limit the output current of the LLC resonant circuit, and prevent the LLC resonant circuit from being burnt out due to overcurrent.
It should be understood that the order of execution of the processes in the above embodiments should be determined by their functions and inherent logic, and should not be construed as limiting the implementation of the embodiments of the present application.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other manners. For example, the apparatus/terminal device embodiments described above are merely illustrative, e.g., the division of the modules or units described above is merely a logical function division, and may be implemented in other manners, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed.
The integrated modules/units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer-readable storage medium. Based on such understanding, the present application may implement all or part of the flow of the method of the above embodiment, or may be implemented by instructing related hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of each method embodiment described above when executed by a processor. The computer program comprises computer program code, and the computer program code can be in a source code form, an object code form, an executable file or some intermediate form and the like. The computer readable medium may include: any entity or device capable of carrying the computer program code described above, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. The content of the computer readable storage medium can be appropriately increased or decreased according to the requirements of the legislation and the patent practice in the jurisdiction.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand; the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions are not intended to depart from the spirit and scope of the various embodiments of the present application, which are also within the spirit and scope of the present application.
Claims (8)
1. A circuit control device for use in a controlled circuit, the circuit control device comprising:
the data acquisition module is used for acquiring the output current of the controlled circuit;
the current loop module is used for constructing a current loop and outputting a current loop output quantity, wherein the current loop comprises an integrating part;
the integral adjustment module is used for controlling the integral part of the current loop to be reduced according to a preset proportion when the output current is larger than a preset current threshold value; the value of the preset proportion is more than 0 and not more than 0.7;
the circuit control device also comprises a voltage loop module and a selector;
the voltage loop module is used for constructing a voltage loop and outputting a voltage loop output quantity;
the selector is used for selecting the corresponding smaller output gain from the voltage loop output quantity and the current loop output quantity as control quantity output;
and the control module is used for controlling the controlled circuit based on the control quantity.
2. The circuit control device according to claim 1, wherein:
the integral adjustment module is specifically configured to: and when the output current is larger than a preset current threshold value, controlling the integrating part of the current loop to be reduced to half of the current value from the current value cliff.
3. The circuit control device according to claim 1 or 2, characterized in that:
the circuit control device also comprises a filtering module, wherein the filtering module is connected between the controlled circuit and the data acquisition module and is used for filtering the output current of the controlled circuit;
the data acquisition module is specifically used for acquiring the output current filtered by the filtering module.
4. The circuit control device according to claim 1, wherein:
the controlled circuit is an LLC resonant circuit;
the data acquisition module is connected with an output port of the LLC resonant circuit;
the control module is connected with a driving pin of a switching tube of the LLC resonant circuit;
the control module is specifically used for: and controlling a driving pin of a switching tube of the LLC resonant circuit based on the control quantity.
5. A circuit control device for use in a controlled circuit, the circuit control device comprising:
the data acquisition module is used for acquiring the output current of the controlled circuit;
the current loop module is used for constructing a current loop and outputting a current loop output quantity, wherein the current loop comprises an integrating part;
the voltage loop module is used for constructing a voltage loop and outputting a voltage loop output quantity;
a selector for selecting one of the voltage loop output quantity and the current loop output quantity as a control quantity output based on a magnitude relation of the voltage loop output quantity and the current loop output quantity;
the integral adjustment module is used for reducing the integral part of the current loop according to a preset proportion when the output current is larger than a preset current threshold value, so that the selector selects the current loop output quantity as a control quantity to output; the value of the preset proportion is more than 0 and not more than 0.7;
a control module for controlling the controlled circuit based on the control amount;
the selector is specifically for: selecting the smaller corresponding output gain from the voltage loop output quantity and the current loop output quantity as control quantity output;
the integral adjustment module is specifically configured to: when the output current is larger than a preset current threshold value, controlling the integrating part of the current loop to change from a current value to another value, so that the selector selects the current loop output quantity as a control quantity output.
6. The circuit control device according to claim 5, wherein:
the circuit control device also comprises a filtering module, wherein the filtering module is connected between the controlled circuit and the data acquisition module and used for filtering the output current of the controlled circuit;
the data acquisition module is specifically used for acquiring the output current filtered by the filtering module.
7. The circuit control device according to claim 5, wherein:
the controlled circuit is an LLC resonant circuit;
the data acquisition module is connected with an output port of the LLC resonant circuit;
the control module is connected with a driving pin of a switching tube of the LLC resonant circuit;
the control module is specifically used for: and controlling a driving pin of a switching tube of the LLC resonant circuit based on the control quantity.
8. The circuit control device according to any one of claims 5 to 7, wherein the data acquisition module is specifically configured to: and sampling the output current of the controlled circuit based on a preset sampling frequency.
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| CN114792986B (en) * | 2021-01-25 | 2023-08-15 | 中国电子科技集团公司第二十九研究所 | Bidirectional BUCK/BOOST energy storage circuit for matching large dynamic load change |
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| CN107104593A (en) * | 2017-05-16 | 2017-08-29 | 湖南拓天节能控制技术股份有限公司 | The shared integral term PID double-closed-loop control devices of PWM count word power supply |
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| US6768657B1 (en) * | 2003-03-19 | 2004-07-27 | System General Corp. | Current-driven PWM controller having a power saving means |
| KR101240160B1 (en) * | 2004-09-28 | 2013-03-07 | 에스티 에릭슨 에스에이 | A controller |
| JP5660131B2 (en) * | 2010-04-16 | 2015-01-28 | 株式会社村田製作所 | Switching control circuit and switching power supply device |
| CN106464265B (en) * | 2014-05-22 | 2019-12-31 | 德克萨斯仪器股份有限公司 | DC-DC converter controller device with double-counter digital integrator |
| CN104917365B (en) * | 2015-06-25 | 2017-11-07 | 深圳市英威腾电气股份有限公司 | A kind of current-limiting method and current-limiting apparatus |
| CN110798084A (en) * | 2019-11-01 | 2020-02-14 | 四川英杰电气股份有限公司 | Control detection system and method for direct-current power supply unit |
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