CN111740607A

CN111740607A - Circuit control device

Info

Publication number: CN111740607A
Application number: CN202010604491.6A
Authority: CN
Inventors: 陈文景; 许勇枝; 陈阳源; 王志豪
Original assignee: Xiamen Kehua Hengsheng Co Ltd; Zhangzhou Kehua Technology Co Ltd
Current assignee: Xiamen Kehua Hengsheng Co Ltd; Zhangzhou Kehua Technology Co Ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-10-02
Anticipated expiration: 2040-06-29
Also published as: CN111740607B

Abstract

The application discloses two kinds of circuit control device, are 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 the output quantity of the current loop; the control module controls the controlled circuit based on the current loop output quantity, and the integral adjusting module controls the current loop integral part to reduce from a current break cliff type to another value when the output current is larger than a current threshold value. The second group comprises: a data acquisition module for acquiring output current; a current loop module for constructing a current loop and outputting the output quantity of the current loop; constructing a voltage ring module which outputs the output quantity of the voltage ring; a selector for selecting one of the output quantities as a control quantity based on the magnitude relation between the output quantity of the voltage loop and the output quantity of the current loop; an integral adjusting module for adjusting the current loop integral part to make the selector select the current loop output quantity as the control quantity when the output current is larger than the current threshold value; and a control module for controlling the controlled circuit based on the control quantity.

Description

Circuit control device

Technical Field

The present application relates to the field of circuit control, and more particularly, to a circuit control device.

Background

With the development of science and technology, current loops and voltage loops are more and more widely used. In the prior art, a controlled circuit (such as an LLC resonant circuit) is often controlled by a current loop and a voltage loop to prevent the controlled circuit from outputting an overcurrent.

The defects of the prior art are as follows: under the condition that the controlled circuit is controlled by the current loop, when an output port of the controlled circuit is suddenly short-circuited, the current loop is slow in response speed in adjustment, cannot limit the output current of the controlled circuit in time, and easily causes the controlled circuit to be over-current; under the condition that the controlled circuit is controlled through the parallel connection competition of the voltage ring and the current ring, when a system is normally loaded, the output gain value corresponding to the voltage ring is smaller than that of the current ring, the integral of the current ring is saturated, when an output port of the controlled circuit is suddenly short-circuited, the integral withdrawal speed of the current ring is slow, the voltage ring and the current ring compete, and the current ring cannot act, so that 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 provided by the application 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, so that the controlled circuit is prevented from overflowing.

In order to achieve the above technical effect, 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 output quantity of the current loop;

and the integral adjusting module is used for controlling the integral part of the current loop to be reduced to another value from the current break cliff mode when the output current is larger than a preset current threshold value.

Optionally, the integral adjusting module is specifically configured to: and when the output current is larger than a preset current threshold value, controlling the integral part of the current loop to reduce from a current value to a half of the current value in a cliff manner.

Optionally, the circuit control device further includes a voltage ring 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 one with smaller corresponding output gain from the voltage loop output quantity and the current loop output quantity as a control quantity output;

the control module is specifically configured to: and controlling the controlled circuit based on the control quantity.

Optionally, the circuit control device further includes a filtering module, connected between the controlled circuit and the data acquisition module, 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.

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 configured to: 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 apparatus applied to a controlled circuit, the circuit control apparatus comprising:

the voltage loop module is used for constructing a voltage loop and outputting 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 between the voltage loop output quantity and the current loop output quantity;

an integral adjustment module, configured to adjust an integral portion of the current loop when the output current is greater than a preset current threshold, so that the selector selects the output amount of the current loop as a control amount to be 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 one with smaller corresponding output gain from the voltage loop output quantity and the current loop output quantity as a control quantity to be output;

the integral adjustment module is specifically configured to: when the output current is larger than a preset current threshold value, the integration 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 the output current of the controlled circuit;

Optionally, the controlled circuit is an LLC resonant circuit;

Optionally, the data acquisition module is specifically configured to: and sampling the output current of the controlled circuit based on a preset sampling frequency.

It can be seen from the above that, the first circuit control device that this application provided is based on controlled circuit of electric current loop control: when the output current is larger than a preset current threshold value, controlling an integral part of a current loop to reduce from a current value cliff formula to another value through an integral adjusting module; therefore, the time required by the integral return of the current loop is shortened, the response speed of the current loop is improved, and the technical effects of limiting the output current of the controlled circuit in time and preventing the controlled circuit from overcurrent are achieved.

The application provides a second kind of circuit control device, based on voltage ring and electric current ring control controlled circuit: when the output current is larger than a preset current threshold value, an integral part of the current loop is adjusted through an integral adjusting module, so that the selector selects the output quantity of the current loop to be output as a control quantity; therefore, the current loop can play a control role, and the technical effects of limiting the output current of the controlled circuit in time and preventing the controlled circuit from overcurrent are achieved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic diagram of a circuit control apparatus according to an embodiment of the present disclosure;

FIG. 2 is a logic diagram of a current loop and voltage loop parallel control according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of an LLC resonant circuit provided by an embodiment of the 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 structures, 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 will 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 the specification of the present application 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 contextually as "when …" or "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted depending on the context to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings of the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In 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 throughout. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the present invention, "a 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 than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.

Example one

An embodiment of the present application provides a circuit control device, which is applied to a controlled circuit, as shown in fig. 1, the circuit control device includes:

and the data acquisition module 101 is used for acquiring the output current of the controlled circuit.

Optionally, the controlled circuit may be an LLC resonant circuit, or may be another circuit that can be controlled by a current loop, and is not limited specifically herein.

And a current loop module 102, configured to construct a current loop and output a current loop output, where the current loop includes an integrating part.

And the control module 103 is configured to control the controlled circuit based on the current loop output quantity.

And an integral adjustment module 104, configured to control the integral part of the current loop to decrease from the current cutoff cliff to another value when the output current is greater than a preset current threshold.

Optionally, the integral adjusting module 104 is specifically configured to: when the output current is larger than a preset current threshold value, the integral part of the current loop is controlled to be reduced from a current value to a half of the current value, 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 overhigh output current. Wherein, the cliff type reduction is specifically as follows: greatly reduced or reduced according to a preset proportion. In this embodiment, the integral adjustment module 104 is specifically configured to: and when the output current is larger than a preset current threshold value, setting the integral part of the current loop as the product of the current value and a preset proportion, wherein the value of the preset proportion is larger than 0 and not smaller 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, and therefore, the integral adjustment module 104 may send an integral control command to the computer software, so as to adjust an integral portion of the current loop.

Optionally, the current threshold is greater than a value of a current limit point of the controlled circuit (for example, a value of the current limit point of the controlled circuit floating by 1% to 5% is set as the current threshold). Since the current limit point of the controlled circuit is usually smaller than the maximum output current that the controlled circuit can bear, setting the current threshold to a value larger than the current limit point of the controlled circuit can avoid misjudgment due to small-range fluctuation of the output current of the controlled circuit under the condition of ensuring the safety of the controlled circuit. Of course, the value of the current threshold may also be adjusted according to the type and specific parameters of the controlled circuit, and is not limited here.

Optionally, the circuit control apparatus further includes a voltage ring module (not shown in the figure) and a selector (not shown in the figure). The voltage loop module is used for constructing a voltage loop and outputting a voltage loop output quantity; the selector is used for selecting one with smaller corresponding output gain from the voltage loop output quantity and the current loop output quantity as a control quantity output; the control module 103 is specifically configured to: and controlling the controlled circuit based on the control quantity. In this embodiment, as shown in fig. 2, the current loop and the voltage loop are connected in parallel to compete for controlling the controlled circuit, the voltage loop output quantity and the current loop output quantity are represented as frequency values, and the larger the frequency value corresponding to the control quantity is, the smaller the output gain is, so that the selector selects the larger one of the voltage loop output quantity and the current loop output quantity as the control quantity output, so as to make the corresponding output gain smaller.

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 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 small-range fluctuation of the output current of the controlled circuit.

Optionally, the controlled circuit is an LLC resonant circuit; the data acquisition module 101 is connected with an output port of the LLC resonant module; the control module 103 is connected to a driving pin of a switching tube of the LLC resonant circuit; the control module 103 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, a circuit control device provided in an embodiment of the present application includes: the data acquisition module 101 is used for acquiring the output current of the controlled circuit; the current loop module 102 is configured to construct a current loop and output a current loop output quantity; the control module 103 is used for controlling the controlled circuit based on the current loop output quantity; and an integral adjusting module 104, configured to control the integral part of the current loop to decrease from the current value of the broken cliff 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 larger than a preset current threshold, the integral adjusting module 104 controls the integral part of the current loop to reduce from a current cliff type to another value; therefore, the time required by the integral return of the current loop is shortened, the response speed of the current loop is improved, and the technical effects of limiting the output current of the controlled circuit in time and preventing the controlled circuit from overcurrent are achieved.

The circuit control device in the first embodiment is further described with 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 data acquisition module 101 samples the output current of the LLC resonant circuit and uses the sampled output current 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 quantity; the control module 103 is connected to the PWM signal generator, and determines a frequency and a duty ratio of a PWM (Pulse width modulation) signal for controlling the LLC resonant circuit based on the current loop output quantity, so as to generate a PWM signal with a corresponding frequency and duty ratio by the PWM signal generator, and control the driving pins of the first switching tube Q1 and the second switching tube Q2 on the primary side of the LLC resonant circuit based on the PWM signal, respectively, to implement current limiting. In an 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 an output port of the LLC resonant circuit is suddenly short-circuited, the output current is increased. At this time, because the output current acquired by the data acquisition module 101 is greater than the preset current threshold, the integral adjustment module 104 controls the integral part of the current loop to decrease from the current value to another value, so as to increase the response speed of the current loop, rapidly change the frequency and 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 burned out due to overcurrent.

Example two

The second embodiment of the present application provides another circuit control device, which is applied to a controlled circuit, as shown in fig. 3, the circuit control device includes:

and a data acquisition module 401, configured to acquire the output current of the controlled circuit.

Optionally, the controlled circuit may be an LLC resonant circuit, or may be another circuit that can be controlled by a current loop, and is not limited specifically 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.

And a current loop module 402 configured to construct a current loop and output a current loop output, wherein the current loop includes an integrating part.

And a voltage loop module 403, configured to construct a voltage loop and output a voltage loop output.

And a selector 404 for selecting one of the voltage loop output quantity and the current loop output quantity as a control quantity to be output based on a magnitude relation between 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 quantity as a control quantity output.

And a control module 406, configured to control the controlled circuit based on the control amount.

Optionally, the selector 404 is specifically configured to: selecting one with smaller corresponding output gain from the voltage loop output quantity and the current loop output quantity as a control quantity to be 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 change from a current value to another value, so that the selector 404 selects the current loop output quantity as a control quantity output. Specifically, the integral adjustment module 405 may select, when the output current is greater than the preset current threshold, a target value of the output gain corresponding to the output quantity of the current loop, which is smaller than the output gain corresponding to the output quantity of the voltage loop, as a value of the integral part of the current loop based on a corresponding relationship between the integral part of the current loop and the output quantity 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 the controlled circuit is prevented from being burned out due to overcurrent.

In this embodiment, the current loop module 402 constructs a current loop through computer software, and therefore, the integral adjustment module 405 may send an integral control command to the computer software, so as to adjust an integral portion of the current loop.

Optionally, the circuit control apparatus further includes a filtering module (not shown in the figure), which 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 misjudgment due to small-range fluctuation of the output current of the controlled circuit.

Optionally, the controlled circuit is an LLC resonant circuit; the data acquisition module 401 is connected to an output port of the LLC resonant module; the control module 406 is connected to a driving 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.

It can be seen from the above that, the circuit control device provided in the second embodiment of the present application includes: a data acquisition module 401, configured to acquire an output current of the controlled circuit; a current loop module 402, configured to construct a current loop and output a current loop output; a voltage ring module 403, configured to construct a voltage ring and output a voltage ring output; a selector 404, configured to select one of the voltage loop output quantity and the current loop output quantity as a control quantity output based on a magnitude relationship between the voltage loop output quantity and the current loop output quantity; an integral adjustment module 405, configured to adjust an integral portion 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 quantity as a control quantity output; and a control module 406 for controlling the controlled circuit based on the control quantity. 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, the integral part of the current loop is adjusted through the integral adjusting module 405, so that the selector 404 selects the output quantity of the current loop as the control quantity to be output; therefore, the current loop can play a control role, and the technical effects of limiting the output current of the controlled circuit in time and preventing the controlled circuit from overcurrent are achieved.

The circuit control device in the second embodiment will be further described with a specific application scenario. In this application scenario, the controlled circuit mentioned in the second embodiment 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 and uses the sampled output current as the input of the current loop module 402, and samples the output voltage of the LLC resonant circuit and uses the sampled output voltage 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 quantity; a voltage loop is constructed by the voltage loop module 403 and outputs a voltage loop output. The selector 404 selects one of the voltage loop output amount and the current loop output amount as a control amount to output based on a magnitude relation between the voltage loop output amount and the current loop output amount. The control module 406 is connected to the PWM signal generator, and determines the frequency and duty ratio of the PWM signal for controlling the LLC resonant circuit based on the control quantity, so as to control the PWM signal generator to generate the PWM signal with corresponding frequency and duty ratio, and control 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 short-circuited, the output current of the LLC resonant circuit is increased. At this time, because the output current acquired by the data acquisition module 401 is greater than the preset current threshold, the integral adjustment module 405 adjusts the integral part of the current loop, so that the selector 404 selects the output quantity of the current loop as the control quantity output, thereby being beneficial to the current loop to play a control role, 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 output quantity of the current loop, so as to limit the output current of the LLC resonant circuit, and prevent the LLC resonant circuit from being burned out by overcurrent.

It should be understood that the execution sequence of each process in the above embodiments should be determined by the function and the inherent logic thereof, and should not constitute any limitation to the implementation process 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-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to implement all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of 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 above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art would 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 implementation. 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 ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the above modules or units is only one logical division, and the actual implementation may be implemented by another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.

The integrated modules/units described above, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above may be implemented by a computer program, which may be stored in a computer-readable storage medium and can implement the steps of the embodiments of the methods described above when the computer program is executed by a processor. The computer program includes computer program code, and the computer program code may be in a source code form, an object code form, an executable file or some intermediate form. The computer readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier signal, telecommunication signal, software distribution medium, etc. It should be noted that the contents contained in the computer-readable storage medium can be increased or decreased as required by legislation and patent practice in the jurisdiction.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included therein.

Claims

1. A circuit control device applied to a controlled circuit, the circuit control device comprising:

the control module is used for controlling the controlled circuit based on the current loop output quantity;

2. The circuit control apparatus of 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 integral part of the current loop to be reduced to half of the current value from the current cliff type.

3. The circuit control apparatus of claim 1, wherein:

the circuit control device also comprises a voltage ring module and a selector;

the voltage ring module is used for constructing a voltage ring and outputting voltage ring output quantity;

the control module is specifically configured to: controlling the controlled circuit based on the control amount.

4. A circuit control apparatus according to any one of claims 1 to 3, 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 is used for filtering the output current of the controlled circuit;

5. The circuit control apparatus of claim 3, wherein:

the controlled circuit is an LLC resonant circuit;

6. A circuit control device applied to a controlled circuit, the circuit control device comprising:

the selector is used for selecting one of the voltage loop output quantity and the current loop output quantity as a control quantity to be output based on the magnitude relation between the voltage loop output quantity and the current loop output quantity;

the integral adjusting module is used for adjusting the integral part of the current loop when the output current is larger than a preset current threshold value, so that the selector selects the output quantity of the current loop to be output as a control quantity;

7. The circuit control apparatus of claim 6, wherein:

the selector is specifically configured to: selecting one with smaller corresponding output gain from the voltage loop output quantity and the current loop output quantity as a control quantity to be output;

the integral adjustment module is specifically configured to: and when the output current is larger than a preset current threshold value, controlling the integration 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.

8. The circuit control apparatus of claim 6, wherein:

9. The circuit control apparatus of claim 6, wherein:

the controlled circuit is an LLC resonant circuit;

10. The circuit control device according to any one of claims 6 to 9, wherein the data acquisition module is specifically configured to: sampling the output current of the controlled circuit based on a preset sampling frequency.