CN112054686B - Control method based on converter circuit and related device - Google Patents

Control method based on converter circuit and related device Download PDF

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Publication number
CN112054686B
CN112054686B CN202010825796.XA CN202010825796A CN112054686B CN 112054686 B CN112054686 B CN 112054686B CN 202010825796 A CN202010825796 A CN 202010825796A CN 112054686 B CN112054686 B CN 112054686B
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China
Prior art keywords
switch tube
inductor
tube
switching tube
driving signal
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CN112054686A (en
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黄少辉
高丽红
杨鑫
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Zhangzhou Kehua Technology Co Ltd
Kehua Data Co Ltd
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Xiamen Kehua Hengsheng Co Ltd
Zhangzhou Kehua Technology Co Ltd
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Priority to CN202010825796.XA priority Critical patent/CN112054686B/en
Publication of CN112054686A publication Critical patent/CN112054686A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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
    • H02M3/33569Conversion 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/36Means for starting or stopping converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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
    • H02M3/337Conversion 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 in push-pull configuration
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies 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 provides a control method and a related device based on a converter circuit, which relate to the technical field of circuit control, and the control method comprises the following steps: under the condition that the first switch tube, the second switch tube and the third switch tube are not controlled by corresponding driving signals, if a starting signal is detected, the second switch tube is controlled by the second driving signal and the third switch tube is controlled by the third driving signal, and then the first switch tube is controlled by the first driving signal, so that the phenomenon that the local current of the converter circuit is suddenly increased due to the saturation of the inductor is avoided, the fault rate of the converter circuit is reduced, and the reliability of the converter circuit can be effectively improved.

Description

Control method based on converter circuit and related device
Technical Field
The present disclosure relates to circuit control technologies, and in particular, to a control method and related apparatus based on a converter circuit.
Background
With the development of the times, people have higher and higher requirements on the reliability of power supply equipment, and how to improve the reliability of a converter circuit becomes a technical problem to be solved urgently in the field.
In the prior art, when the converter circuit is turned on, the converter circuit is prone to generate a phenomenon that current is suddenly increased, so that devices of the converter circuit are subjected to loss of different degrees in each turn of turning on or turning off, the converter circuit may be caused to break down, and reliability of the converter circuit is greatly reduced.
Disclosure of Invention
The application provides a control method based on a converter circuit and a related device, which can effectively improve the reliability of the converter circuit.
In order to achieve the above technical effect, a first aspect of the present application provides a control method based on a converter circuit, where the converter circuit includes: a current limiting circuit and a push-pull circuit, wherein the current limiting circuit includes a first switch tube, the push-pull circuit includes a second switch tube, a third switch tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected to an input terminal of the current limiting circuit, the other end of the first switch tube is electrically connected to one end of the first inductor and one end of the second inductor, one end of the second switch tube is electrically connected to the other end of the first inductor and a first output terminal of the push-pull circuit, and one end of the third switch tube is electrically connected to the other end of the second inductor and a second output terminal of the push-pull circuit, respectively, the control method includes:
when the turn-on signal is detected in a state where none of the first switching tube, the second switching tube and the third switching tube is controlled by the corresponding driving signal, the second switching tube is controlled by the second driving signal and the third switching tube is controlled by the third driving signal, and then the first switching tube is controlled by the first driving signal.
Based on the first aspect of the present application, in a first possible implementation manner, the control method further includes:
when a turn-off signal is detected in a state where the first switching tube, the second switching tube and the third switching tube are all controlled by corresponding driving signals, the first switching tube is turned off, and then the second switching tube and the third switching tube are turned off.
Based on the first aspect of the present application, in a second possible implementation manner, the control method further includes:
detecting a real-time output voltage value of the converter circuit if a closing signal is not detected in a state that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals;
if the real-time output voltage value is not greater than a first preset voltage threshold value, performing open-loop control on the first switching tube, and performing closed-loop control on the second switching tube and the third switching tube;
and if the real-time output voltage value is not less than a second preset voltage threshold value, performing open-loop control on the second switching tube and the third switching tube, and performing closed-loop control on the first switching tube.
Based on the first aspect of the present application, in a third possible implementation manner, the control method further includes:
detecting a real-time load value of the converter circuit if a closing signal is not detected in a state that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals;
if the real-time load value is not less than a first preset load value, performing open-loop control on the first switching tube, and performing closed-loop control on the second switching tube and the third switching tube;
if the real-time load value is smaller than a second preset load value, performing open-loop control on the second switching tube and the third switching tube, and performing closed-loop control on the first switching tube;
the first preset load value is not less than the second preset load value.
Based on the first aspect of the present application or the first, second, or third possible implementation manner of the first aspect of the present application, in a fourth possible implementation manner, the controlling the first switching tube with the first driving signal includes:
and increasing the duty ratio of the first driving signal until the duty ratio of the first driving signal is not less than a first preset duty ratio threshold value.
Based on the first aspect of the present application or the first, second, or third possible implementation manner of the first aspect, in a fifth possible implementation manner, the current limiting circuit further includes: a first diode;
the output end of the first diode is electrically connected with the other end of the first switch tube, one end of the first inductor and one end of the second inductor respectively, and the negative electrode of the input end of the current limiting circuit is electrically connected with the input end of the first diode, the other end of the second switch tube and the other end of the third switch tube respectively;
wherein, the one end of above-mentioned first switch tube and the input electric connection of above-mentioned current-limiting circuit specifically are: one end of the first switch tube is electrically connected with the anode of the input end of the current limiting circuit.
A second aspect of the present application provides a control method based on a converter circuit, the converter circuit comprising: the control method comprises the following steps of:
when a turn-off signal is detected in a state where the first switching tube, the second switching tube and the third switching tube are all controlled by corresponding driving signals, the first switching tube is turned off, and then the second switching tube and the third switching tube are turned off.
A third aspect of the present application provides a control apparatus based on a converter circuit, the converter circuit comprising: a current limiting circuit and a push-pull circuit, wherein the current limiting circuit includes a first switch tube, the push-pull circuit includes a second switch tube, a third switch tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected to an input terminal of the current limiting circuit, the other end of the first switch tube is electrically connected to one end of the first inductor and one end of the second inductor, one end of the second switch tube is electrically connected to the other end of the first inductor and a first output terminal of the push-pull circuit, and one end of the third switch tube is electrically connected to the other end of the second inductor and a second output terminal of the push-pull circuit, respectively, and the control device includes:
a control unit for: when the turn-on signal is detected in a state where none of the first switching tube, the second switching tube and the third switching tube is controlled by the corresponding driving signal, the second switching tube is controlled by the second driving signal and the third switching tube is controlled by the third driving signal, and then the first switching tube is controlled by the first driving signal.
A fourth aspect of the present application provides a control apparatus based on a converter circuit, the converter circuit comprising: the current limiting circuit comprises a first switching tube, the push-pull circuit comprises a second switching tube, a third switching tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected with the input end of the current limiting circuit, the other end of the first switch tube is respectively electrically connected with one end of the first inductor and one end of the second inductor, one end of the second switch tube is electrically connected with the other end of the first inductor and the first output end of the push-pull circuit respectively, one end of the third switch tube is electrically connected with the other end of the second inductor and the second output end of the push-pull circuit respectively, the control device includes a memory and a processor, the memory stores a computer program, and the processor implements the steps of the control method according to the first aspect or any one of the possible implementations of the first aspect when executing the computer program.
A fifth aspect of the present application provides a computer-readable storage medium, which stores a computer program that, when executed by a processor, implements the steps of the control method mentioned in the first aspect or any of the possible implementations of the first aspect.
As can be seen from the above, in the technical scheme of the present application, in a state where the first switch tube, the second switch tube and the third switch tube are not controlled by the corresponding driving signals, if the start signal is detected, the second switch tube is controlled by the second driving signal and the third switch tube is controlled by the third driving signal, and then the first switch tube is controlled by the first driving signal. According to the technical scheme, when the converter circuit is started, the second driving signal and the third driving signal are sent to the second switching tube and the third switching tube respectively, and then the first driving signal is sent to the first switching tube, so that the situation that the inductance electrically connected with the second switching tube or the third switching tube reaches a saturated state due to the fact that the second switching tube and the third switching tube are still in a continuous disconnection state under the control of the corresponding driving signals of the first switching tube is prevented, the phenomenon that the local current of the converter circuit is suddenly increased due to the saturation of the inductance is further avoided, the fault rate of the converter circuit is reduced, and the reliability of the converter circuit can be effectively improved.
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 an embodiment of a converter circuit provided herein;
FIG. 2 is a schematic flow chart illustrating an embodiment of a converter circuit based control method provided herein;
FIG. 3 is a schematic flow chart illustrating another exemplary embodiment of a converter circuit based control method provided herein;
FIG. 4 is a schematic flow chart diagram illustrating another embodiment of a control method for a converter circuit according to the present application;
FIG. 5 is a schematic diagram illustrating an embodiment of a converter circuit based control apparatus provided in the present application;
fig. 6 is a schematic structural diagram of another embodiment of a control device based on a converter circuit according to 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. However, it will be apparent 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.
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings in 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 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
The present application provides a control method based on a converter circuit, the converter circuit comprising: the current limiting circuit comprises a first switch tube, the push-pull circuit comprises a second switch tube, a third switch tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected with the input end of the current limiting circuit, the other end of the first switch tube is electrically connected with one end of the first inductor and one end of the second inductor respectively, one end of the second switch tube is electrically connected with the other end of the first inductor and the first output end of the push-pull circuit respectively, and one end of the third switch tube is electrically connected with the other end of the second inductor and the second output end of the push-pull circuit respectively;
in the embodiment of the present application, as shown in fig. 1, the converter circuit includes: a power supply circuit, a transformer circuit and a rectifying circuit; the power supply circuit includes: a current limiting circuit and a push-pull circuit, the current limiting circuit comprising: a first switch 101, a first diode 102, a first inductor 103 and a second inductor 105, and the push-pull circuit includes: a first inductor 103, a second inductor 105, a second switch tube 104 and a third switch tube 106, where the first inductor 103 and the second inductor 105 are common inductors of the current limiting circuit and the push-pull circuit; the transformer circuit includes: a transformer 107; the rectifier circuit includes: a second diode 108, a third diode 109, a fourth diode 110, a fifth diode 111, and a capacitor 112;
one end of the first switching tube 101 is electrically connected to the positive electrode of the dc input power supply, the other end of the first switching tube 101 is electrically connected to the output end of the first diode 102, one end of the first inductor 103 and one end of the second inductor 105, the other end of the first inductor 103 is electrically connected to one end of the second switching tube 104 and one end of the primary side of the transformer 107, the other end of the second inductor 105 is electrically connected to one end of the third switching tube 106 and the other end of the primary side of the transformer 107, the input end of the first diode 102, the other end of the second switching tube 104 and the other end of the third switching tube 106 are electrically connected to the negative electrode of the dc input power supply;
one end of the secondary side of the transformer 107 is electrically connected to the input terminal of the second diode 108 and the output terminal of the third diode 109, the other end of the secondary side of the transformer 107 is electrically connected to the input terminal of the fourth diode 110 and the output terminal of the fifth diode 111, the output terminal of the second diode 108, the output terminal of the fourth diode 110 and one end of the capacitor 112 are electrically connected to the anode of the output terminal of the converter circuit, and the output terminal of the third diode 109, the output terminal of the fifth diode 111 and the other end of the capacitor 112 are electrically connected to the cathode of the output terminal of the converter circuit.
Optionally, as shown in fig. 1, the current limiting circuit further includes: a first diode 102;
the output end of the first diode 102 is electrically connected to the other end of the first switch 101, one end of the first inductor 103 and one end of the second inductor 105, respectively, and the negative electrode of the input end of the current limiting circuit is electrically connected to the input end of the first diode 102, the other end of the second switch 104 and the other end of the third switch 106, respectively;
wherein, the electrical connection between one end of the first switch tube 101 and the input end of the current limiting circuit is specifically as follows: one end of the first switch 101 is electrically connected to the positive electrode of the input terminal of the current limiting circuit.
As shown in fig. 2, the control method includes:
step 201, if a start signal is detected, determining whether the first switch tube, the second switch tube and the third switch tube are all not controlled by corresponding driving signals;
in this embodiment, after step 201 is executed, if the result of step 201 is that none of the first switch tube, the second switch tube and the third switch tube is controlled by a corresponding driving signal, step 202 is executed; if the result of step 201 is that none of the first switch tube, the second switch tube and the third switch is controlled by the corresponding driving signal, step 203 is executed; the turn-on signal may be a signal sent to the converter circuit by an external device or a technician to turn on the converter circuit in the off state.
It should be noted that in the present embodiment, step 203 is entered when the determination result in step 201 is no, and in other embodiments, when the determination result in step 201 is no, other steps may be executed, for example, when the determination result in step 201 is no, a first alarm signal may be output, where the first alarm signal is used to prompt a user not to send a turn-on signal to the inverter circuit when the inverter circuit is in an operating state.
Step 202, controlling the second switch tube with a second driving signal and the third switch tube with a third driving signal, and then controlling the first switch tube with a first driving signal.
In the embodiment of the application, when the first switch tube, the second switch tube and the third switch tube are not controlled by corresponding driving signals and the existence of the starting signal is detected, the corresponding driving signals are provided for the second switch tube and the third switch tube to drive, and then the corresponding driving signals are provided for the first switch tube to drive.
Step 203, standby;
in the embodiment of the present application, the standby may be not responding to the turn-on signal or performing any operation.
Optionally, the controlling the second switching tube with the second driving signal and the controlling the third switching tube with the third driving signal, and then controlling the first switching tube with the first driving signal includes:
and controlling the second switching tube by a second driving signal and controlling the third switching tube by a third driving signal, and controlling the first switching tube by a first driving signal after waiting for a first preset time.
Optionally, the controlling the first switch tube by the first driving signal includes:
and increasing the duty ratio of the first driving signal until the duty ratio of the first driving signal is not less than a first preset duty ratio threshold value.
Specifically, the duty ratio of the first driving signal is controlled to gradually increase from a first initial duty ratio until the duty ratio of the first driving signal is not less than a first preset duty ratio threshold, where the initial duty ratio may be 0, and the first preset duty ratio threshold may be 1.
Further, as shown in fig. 3, the control method may further include the following steps:
step 301, if a turn-off signal is detected, determining whether the first switching tube, the second switching tube and the third switching tube are all controlled by corresponding driving signals;
in this embodiment, after step 301 is executed, if the result of step 301 is that the first switching tube, the second switching tube and the third switching tube are all controlled by corresponding driving signals, step 302 is executed; if the result of step 301 is that the first switch tube, the second switch tube and the third switch tube are not all controlled by the corresponding driving signals, step 303 is executed; the shutdown signal may be a signal sent to the converter circuit by an external device or a technician to shut down the converter circuit in an operating state.
Optionally, if the first switch tube, the second switch tube and the third switch tube are not all controlled by corresponding driving signals, a second warning signal is returned, where the second warning signal is used to prompt a user not to send a turn-off signal to the converter circuit when the converter circuit is in a turn-on process.
Step 302, disconnecting the first switch tube, and then disconnecting the second switch tube and the third switch tube;
step 303, standby;
in the embodiment of the present application, the standby may be not responding to the shutdown signal or performing any operation.
It can be seen from the above that, according to the technical scheme of the present application, in a state where the first switch tube, the second switch tube and the third switch tube are not controlled by the corresponding driving signals, if the start signal is detected, the second switch tube is controlled by the second driving signal and the third switch tube is controlled by the third driving signal, and then the first switch tube is controlled by the first driving signal. According to the technical scheme, when the converter circuit is started, the second driving signal and the third driving signal are sent to the second switching tube and the third switching tube respectively, and then the first driving signal is sent to the first switching tube, so that the situation that the inductance electrically connected with the second switching tube or the third switching tube reaches a saturated state due to the fact that the second switching tube and the third switching tube are still in a continuous disconnection state under the control of the corresponding driving signals of the first switching tube is prevented, the phenomenon that the local current of the converter circuit is suddenly increased due to the saturation of the inductance is further avoided, the fault rate of the converter circuit is reduced, and the reliability of the converter circuit can be effectively improved.
Example two
The present application also provides a control method based on a converter circuit, the converter circuit comprising: the current limiting circuit comprises a first switch tube, the push-pull circuit comprises a second switch tube, a third switch tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected with the input end of the current limiting circuit, the other end of the first switch tube is electrically connected with one end of the first inductor and one end of the second inductor respectively, one end of the second switch tube is electrically connected with the other end of the first inductor and the first output end of the push-pull circuit respectively, and one end of the third switch tube is electrically connected with the other end of the second inductor and the second output end of the push-pull circuit respectively;
in an application scenario, as shown in fig. 4, the control method includes:
step 401, determining whether the first switching tube, the second switching tube and the third switching tube are all controlled by corresponding driving signals;
in this embodiment of the application, if the close signal is not detected, step 401 is executed; after step 401 is executed, if the result of step 401 is that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals, step 402 and the following steps are executed; if the result of step 401 is that the first switch tube, the second switch tube and the third switch tube are not all controlled by the corresponding driving signals, step 406 is executed.
Step 402, detecting a real-time output voltage value of the converter circuit;
step 403, confirming the relationship between the real-time output voltage value and a first preset voltage threshold and a second preset voltage threshold respectively;
in this embodiment, if the real-time output voltage value is not greater than the first preset voltage threshold, step 404 is executed; if the real-time output voltage value is not less than the second predetermined voltage threshold, step 405 is executed.
Step 404, performing open-loop control on the first switching tube, and performing closed-loop control on the second switching tube and the third switching tube;
in an embodiment of the present invention, the performing of the closed-loop control on the second switching tube and the third switching tube may be: and regulating and controlling the duty ratio of the driving signals respectively corresponding to the second switching tube and the third switching tube based on the magnitude of the real-time output voltage value of the converter circuit.
Optionally, the performing open-loop control on the first switching tube includes:
and updating the duty ratio of the first driving signal to a first preset duty ratio.
Step 405, performing open-loop control on the second switching tube and the third switching tube, and performing closed-loop control on the first switching tube.
In an embodiment of the present application, the performing of the closed-loop control on the first switching tube may be: and regulating and controlling the duty ratio of the driving signal corresponding to the first switch tube based on the magnitude of the real-time output voltage value of the converter circuit.
Optionally, the performing open-loop control on the second switching tube and the third switching tube includes:
and updating the duty ratio of the second driving signal and the duty ratio of the third driving signal to a second preset duty ratio.
Step 406, standby;
in the embodiment of the present application, the standby may be not to perform any operation.
Specifically, after step 406 is executed, the process returns to step 401 and subsequent steps after waiting for a third preset time period.
It should be noted that, when the converter circuit is in an operating state, that is, when the first switching tube, the second switching tube, and the third switching tube are all controlled by corresponding driving signals and no turn-off signal is detected, the control method of the above steps is adopted to control the first switching tube, the second switching tube, and the third switching tube, which not only can combine the voltage reduction characteristic of the current limiting circuit, the voltage boost characteristic of the push-pull circuit, and the closed-loop control of the corresponding switching tubes to achieve the technical effect of stabilizing the voltage within a certain range, but also can avoid the risk of extremely slow or out-of-control voltage stabilization caused by the closed-loop control of the switching tubes in the current limiting circuit and the push-pull circuit at the same time, thereby improving the reliability of the converter circuit and the efficiency of stabilizing the voltage.
Optionally, if the real-time output voltage value is greater than a first preset voltage threshold and smaller than a second preset voltage threshold, the first switching tube, the second switching tube, and the third switching tube are controlled in an open loop manner.
Further, the control method may further include:
if a shutdown signal is detected, step 301 and subsequent steps in the embodiment shown in fig. 3 are performed.
In another application scenario, the control method includes:
under the state that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals, if a closing signal is not detected, detecting a real-time load value of the converter circuit;
if the real-time load value is not less than a first preset load value, performing open-loop control on the first switching tube, and performing closed-loop control on the second switching tube and the third switching tube;
if the real-time load value is smaller than a second preset load value, performing open-loop control on the second switching tube and the third switching tube, and performing closed-loop control on the first switching tube;
wherein, the first preset load value is not less than the second preset load value.
Specifically, the first predetermined load value may be equal to the second predetermined load value.
It can be seen from the above that, according to the technical scheme of the present application, in a state where the first switch tube, the second switch tube and the third switch tube are not controlled by the corresponding driving signals, if the start signal is detected, the second switch tube is controlled by the second driving signal and the third switch tube is controlled by the third driving signal, and then the first switch tube is controlled by the first driving signal. According to the technical scheme, when the converter circuit is started, the second driving signal and the third driving signal are sent to the second switching tube and the third switching tube respectively, and then the first driving signal is sent to the first switching tube, so that the situation that the inductance electrically connected with the second switching tube or the third switching tube reaches a saturated state due to the fact that the second switching tube and the third switching tube are still in a continuous disconnection state under the control of the corresponding driving signals of the first switching tube is prevented, the phenomenon that the local current of the converter circuit is suddenly increased due to the saturation of the inductance is further avoided, the fault rate of the converter circuit is reduced, and the reliability of the converter circuit can be effectively improved.
EXAMPLE III
The present application also provides a control method based on a converter circuit, the converter circuit comprising: the current limiting circuit comprises a first switch tube, the push-pull circuit comprises a second switch tube, a third switch tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected with the input end of the current limiting circuit, the other end of the first switch tube is electrically connected with one end of the first inductor and one end of the second inductor respectively, one end of the second switch tube is electrically connected with the other end of the first inductor and the first output end of the push-pull circuit respectively, and one end of the third switch tube is electrically connected with the other end of the second inductor and the second output end of the push-pull circuit respectively;
as shown in fig. 3, the control method may further include the steps of:
step 301, if a turn-off signal is detected, determining whether the first switching tube, the second switching tube and the third switching tube are all controlled by corresponding driving signals;
in this embodiment, after step 301 is executed, if the result of step 301 is that the first switching tube, the second switching tube and the third switching tube are all controlled by corresponding driving signals, step 302 is executed; if the result of step 301 is that the first switch tube, the second switch tube and the third switch tube are not all controlled by the corresponding driving signals, step 303 is executed; the shutdown signal may be a signal sent to the converter circuit by an external device or a technician to shut down the converter circuit in an operating state.
Optionally, if the first switch tube, the second switch tube and the third switch tube are not all controlled by corresponding driving signals, a second warning signal is returned, where the second warning signal is used to prompt a user not to send a turn-off signal to the converter circuit when the converter circuit is in a turn-on process.
Step 302, disconnecting the first switch tube, and then disconnecting the second switch tube and the third switch tube;
step 303, standby;
in the embodiment of the present application, the standby may be not responding to the shutdown signal or performing any operation.
In the embodiment of the present application, when the first switch tube, the second switch tube and the third switch tube are all controlled by the corresponding driving signals and the presence of the close signal is detected, the first switch tube is disconnected, and then the second switch tube and the third switch tube are disconnected.
It should be noted that, when the converter circuit is turned off, that is, when the first switching tube, the second switching tube and the third switching tube are all controlled by the corresponding driving signals and the turn-off signal is detected to exist, the control method of the above steps is adopted to control the first switching tube, the second switching tube and the third switching tube, so that the energy in the first inductor and the second inductor can be completely transmitted to the subsequent transformer circuit and the subsequent rectifying circuit before the second switching tube and the third switching tube are turned off, thereby preventing the current spike phenomenon from occurring in the circuit and improving the reliability of the transformer circuit.
Optionally, the disconnecting the first switching tube and then disconnecting the second switching tube and the third switching tube includes:
and disconnecting the first switching tube, and disconnecting the second switching tube and the third switching tube after waiting for a second preset time.
Optionally, the disconnecting the second switching tube and the third switching tube includes:
and reducing the duty ratio of the second driving signal and the duty ratio of the third driving signal until the duty ratio of the second driving signal and the duty ratio of the third driving signal are not greater than a second preset duty ratio threshold, and then disconnecting the second switching tube and the third switching tube.
Specifically, the duty ratio of the second driving signal is controlled to be gradually reduced from a second initial duty ratio, and the duty ratio of the third driving signal is controlled to be gradually reduced from a third initial duty ratio until the duty ratio of the second driving signal and the duty ratio of the third driving signal are not greater than a second preset duty ratio threshold, and then the second switching tube and the third switching tube are disconnected, where the second initial duty ratio and the third initial duty ratio may be 1, and the second preset duty ratio threshold may be 0.5.
As can be seen from the above, in the technical scheme of the present application, in a state where the first switch tube, the second switch tube and the third switch tube are not controlled by the corresponding driving signals, if the start signal is detected, the second switch tube is controlled by the second driving signal and the third switch tube is controlled by the third driving signal, and then the first switch tube is controlled by the first driving signal. According to the technical scheme, when the converter circuit is started, the second driving signal and the third driving signal are sent to the second switching tube and the third switching tube respectively, and then the first driving signal is sent to the first switching tube, so that the situation that the inductance electrically connected with the second switching tube or the third switching tube reaches a saturated state due to the fact that the second switching tube and the third switching tube are still in a continuous disconnection state under the control of the corresponding driving signals of the first switching tube is prevented, the phenomenon that the local current of the converter circuit is suddenly increased due to the saturation of the inductance is further avoided, the fault rate of the converter circuit is reduced, and the reliability of the converter circuit can be effectively improved.
Example four
The present application also provides a control apparatus based on a converter circuit, the converter circuit comprising: the current limiting circuit comprises a first switch tube, the push-pull circuit comprises a second switch tube, a third switch tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected with the input end of the current limiting circuit, the other end of the first switch tube is electrically connected with one end of the first inductor and one end of the second inductor respectively, one end of the second switch tube is electrically connected with the other end of the first inductor and the first output end of the push-pull circuit respectively, and one end of the third switch tube is electrically connected with the other end of the second inductor and the second output end of the push-pull circuit respectively;
as shown in fig. 5, the control device 50 includes:
a control unit 501 for: when the turn-on signal is detected in a state where the first switching tube, the second switching tube and the third switching tube are not controlled by the corresponding driving signals, the second switching tube is controlled by the second driving signal and the third switching tube is controlled by the third driving signal, and then the first switching tube is controlled by the first driving signal.
Optionally, the control unit 501 is further configured to: under the state that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals, when a closing signal is detected, the first switch tube is disconnected, and then the second switch tube and the third switch tube are disconnected.
Optionally, the control unit 501 is further configured to, in a state that the first switch tube, the second switch tube, and the third switch tube are all controlled by corresponding driving signals, trigger the detection unit 502 when a closing signal is not detected;
the control device 50 further includes:
a detection unit 502 for detecting a real-time output voltage value of the converter circuit;
the control unit 501 is further configured to:
when the real-time output voltage value is not greater than a first preset voltage threshold value, performing open-loop control on the first switching tube, and performing closed-loop control on the second switching tube and the third switching tube;
and when the real-time output voltage value is not less than a second preset voltage threshold value, performing open-loop control on the second switching tube and the third switching tube, and performing closed-loop control on the first switching tube.
Optionally, the control unit 501 is specifically configured to:
and updating the duty ratio of the first driving signal to a first preset duty ratio.
Optionally, the control unit 501 is specifically configured to:
and updating the duty ratio of the second driving signal and the duty ratio of the third driving signal to a second preset duty ratio.
Optionally, the control unit 501 is specifically configured to:
and increasing the duty ratio of the first driving signal until the duty ratio of the first driving signal is not less than a first preset duty ratio threshold value.
Optionally, the control unit 501 is specifically configured to:
and reducing the duty ratio of the second driving signal and the duty ratio of the third driving signal until the duty ratio of the second driving signal and the duty ratio of the third driving signal are not greater than a second preset duty ratio threshold, and then disconnecting the second switching tube and the third switching tube.
As can be seen from the above, in the technical scheme of the present application, in a state where the first switch tube, the second switch tube and the third switch tube are not controlled by the corresponding driving signals, if the start signal is detected, the second switch tube is controlled by the second driving signal and the third switch tube is controlled by the third driving signal, and then the first switch tube is controlled by the first driving signal. According to the technical scheme, when the converter circuit is started, the second driving signal and the third driving signal are sent to the second switching tube and the third switching tube respectively, and then the first driving signal is sent to the first switching tube, so that the situation that the inductance electrically connected with the second switching tube or the third switching tube reaches a saturated state due to the fact that the second switching tube and the third switching tube are still in a continuous disconnection state under the control of the corresponding driving signals of the first switching tube is prevented, the phenomenon that the local current of the converter circuit is suddenly increased due to the saturation of the inductance is further avoided, the fault rate of the converter circuit is reduced, and the reliability of the converter circuit can be effectively improved.
EXAMPLE five
The present application also provides another control apparatus based on a converter circuit, the converter circuit comprising: a current limiting circuit and a push-pull circuit, wherein the current limiting circuit includes a first switch tube, the push-pull circuit includes a second switch tube, a third switch tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected to an input end of the current limiting circuit, the other end of the first switch tube is electrically connected to one end of the first inductor and one end of the second inductor, one end of the second switch tube is electrically connected to the other end of the first inductor and a first output end of the push-pull circuit, and one end of the third switch tube is electrically connected to the other end of the second inductor and a second output end of the push-pull circuit, as shown in fig. 6, the control device in the embodiment of the present application includes: a memory 601, a processor 602, and a computer program stored in the memory 601 and executable on the processor 602, wherein: the memory 601 is used to store software programs and modules, the processor 602 executes various functional applications and data processing by operating the software programs and modules stored in the memory 601, and the memory 601 and the processor 602 are connected by a bus 603.
Specifically, the processor 602 implements the following steps by running the above-mentioned computer program stored in the memory 601:
when the turn-on signal is detected in a state where none of the first switching tube, the second switching tube and the third switching tube is controlled by the corresponding driving signal, the second switching tube is controlled by the second driving signal and the third switching tube is controlled by the third driving signal, and then the first switching tube is controlled by the first driving signal.
Assuming that the above is the first possible embodiment, in a second possible embodiment based on the first possible embodiment, the control method further includes:
when a turn-off signal is detected in a state where the first switching tube, the second switching tube and the third switching tube are all controlled by corresponding driving signals, the first switching tube is turned off, and then the second switching tube and the third switching tube are turned off.
In a third possible implementation manner based on the first possible implementation manner, the control method further includes:
under the state that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals, if a closing signal is not detected, detecting a real-time output voltage value of the converter circuit;
if the real-time output voltage value is not greater than a first preset voltage threshold value, performing open-loop control on the first switching tube, and performing closed-loop control on the second switching tube and the third switching tube;
and if the real-time output voltage value is not less than a second preset voltage threshold value, performing open-loop control on the second switching tube and the third switching tube, and performing closed-loop control on the first switching tube.
In a fourth possible implementation manner based on the first possible implementation manner, the control method further includes:
detecting a real-time load value of the converter circuit if a closing signal is not detected in a state that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals;
if the real-time load value is not less than a first preset load value, performing open-loop control on the first switching tube, and performing closed-loop control on the second switching tube and the third switching tube;
if the real-time load value is smaller than a second preset load value, performing open-loop control on the second switching tube and the third switching tube, and performing closed-loop control on the first switching tube;
the first preset load value is not less than the second preset load value.
In a fifth possible implementation manner based on the first, second, third, or fourth possible implementation manner, the controlling the first switching tube by the first driving signal includes:
and increasing the duty ratio of the first driving signal until the duty ratio of the first driving signal is not less than a first preset duty ratio threshold value.
Specifically, the current limiting circuit may further include: a first diode;
the output end of the first diode is electrically connected with the other end of the first switch tube, one end of the first inductor and one end of the second inductor respectively, and the negative electrode of the input end of the current limiting circuit is electrically connected with the input end of the first diode, the other end of the second switch tube and the other end of the third switch tube respectively;
wherein, the input electric connection of the one end of above-mentioned first switch tube and above-mentioned current-limiting circuit specifically does: one end of the first switch tube is electrically connected with the anode of the input end of the current limiting circuit.
As can be seen from the above, in the technical scheme of the present application, in a state where the first switch tube, the second switch tube and the third switch tube are not controlled by the corresponding driving signals, if the start signal is detected, the second switch tube is controlled by the second driving signal and the third switch tube is controlled by the third driving signal, and then the first switch tube is controlled by the first driving signal. According to the technical scheme, when the converter circuit is started, the second driving signal and the third driving signal are sent to the second switching tube and the third switching tube respectively, and then the first driving signal is sent to the first switching tube, so that the situation that the inductance electrically connected with the second switching tube or the third switching tube reaches a saturated state due to the fact that the second switching tube and the third switching tube are still in a continuous disconnection state under the control of the corresponding driving signals of the first switching tube is prevented, the phenomenon that the local current of the converter circuit is suddenly increased due to the saturation of the inductance is further avoided, the fault rate of the converter circuit is reduced, and the reliability of the converter circuit can be effectively improved.
EXAMPLE six
The present application further provides a computer-readable storage medium, on which a computer program is stored, which, when executed, can implement the steps provided by the above-mentioned embodiments. Specifically, the computer program includes computer program code, which may be in one of a source code form, an object code form, an executable file or some intermediate form, and is not limited herein; the computer readable storage medium can be any entity or device capable of carrying the computer program code, recording medium, U disk, removable hard disk, magnetic disk, optical disk, computer memory, Read-only memory (ROM), Random Access Memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, and is not limited herein. 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.
As can be seen from the above, in the technical scheme of the present application, in a state where the first switch tube, the second switch tube and the third switch tube are not controlled by the corresponding driving signals, if the start signal is detected, the second switch tube is controlled by the second driving signal and the third switch tube is controlled by the third driving signal, and then the first switch tube is controlled by the first driving signal. According to the technical scheme, when the converter circuit is started, the second driving signal and the third driving signal are sent to the second switching tube and the third switching tube respectively, and then the first driving signal is sent to the first switching tube, so that the situation that the inductance electrically connected with the second switching tube or the third switching tube reaches a saturated state due to the fact that the second switching tube and the third switching tube are still in a continuous disconnection state under the control of the corresponding driving signals of the first switching tube is prevented, the phenomenon that the local current of the converter circuit is suddenly increased due to the saturation of the inductance is further avoided, the fault rate of the converter circuit is reduced, and the reliability of the converter circuit can be effectively improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
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. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
It should be noted that, the methods and the details thereof provided by the foregoing embodiments may be combined with the apparatuses and devices provided by the embodiments, which are referred to each other and are not described again.
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 apparatus/device embodiments are merely illustrative, and for example, the division of the above-described modules or units is only one logical functional 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 above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: 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 in the present application.

Claims (9)

1. A control method based on a converter circuit, the converter circuit comprising: the current limiting circuit comprises a first switch tube, the push-pull circuit comprises a second switch tube, a third switch tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected with the input end of the current limiting circuit, the other end of the first switch tube is electrically connected with one end of the first inductor and one end of the second inductor respectively, one end of the second switch tube is electrically connected with the other end of the first inductor and the first output end of the push-pull circuit respectively, one end of the third switch tube is electrically connected with the other end of the second inductor and the second output end of the push-pull circuit respectively, and the control method comprises the following steps:
under the condition that the first switch tube, the second switch tube and the third switch tube are not controlled by corresponding driving signals, if a starting signal is detected, the second switch tube is controlled by a second driving signal and the third switch tube is controlled by a third driving signal, and then the first switch tube is controlled by a first driving signal;
the controlling the first switch tube with the first driving signal includes: increasing the duty ratio of the first driving signal until the duty ratio of the first driving signal is not less than a first preset duty ratio threshold.
2. The control method according to claim 1, characterized by further comprising:
under the state that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals, if a closing signal is detected, the first switch tube is disconnected, and then the second switch tube and the third switch tube are disconnected.
3. The control method according to claim 1, characterized by further comprising:
under the condition that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals, if a closing signal is not detected, detecting a real-time output voltage value of the converter circuit;
if the real-time output voltage value is not larger than a first preset voltage threshold value, performing open-loop control on the first switching tube, and performing closed-loop control on the second switching tube and the third switching tube;
and if the real-time output voltage value is not less than a second preset voltage threshold value, performing open-loop control on the second switching tube and the third switching tube, and performing closed-loop control on the first switching tube.
4. The control method according to claim 1, characterized by further comprising:
under the condition that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals, if a closing signal is not detected, detecting a real-time load value of the converter circuit;
if the real-time load value is not smaller than a first preset load value, performing open-loop control on the first switching tube, and performing closed-loop control on the second switching tube and the third switching tube;
if the real-time load value is smaller than a second preset load value, performing open-loop control on the second switching tube and the third switching tube, and performing closed-loop control on the first switching tube;
and the first preset load value is not less than the second preset load value.
5. The control method according to any one of claims 1 to 4, wherein the current limiting circuit further comprises: a first diode;
the output end of the first diode is electrically connected with the other end of the first switch tube, one end of the first inductor and one end of the second inductor respectively, and the negative electrode of the input end of the current limiting circuit is electrically connected with the input end of the first diode, the other end of the second switch tube and the other end of the third switch tube respectively;
wherein, the one end of first switch tube with current-limiting circuit's input electric connection specifically is: one end of the first switch tube is electrically connected with the anode of the input end of the current limiting circuit.
6. A control method based on a converter circuit, the converter circuit comprising: the current limiting circuit comprises a first switch tube, the push-pull circuit comprises a second switch tube, a third switch tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected with the input end of the current limiting circuit, the other end of the first switch tube is electrically connected with one end of the first inductor and one end of the second inductor respectively, one end of the second switch tube is electrically connected with the other end of the first inductor and the first output end of the push-pull circuit respectively, one end of the third switch tube is electrically connected with the other end of the second inductor and the second output end of the push-pull circuit respectively, and the control method comprises the following steps:
under the condition that the first switch tube, the second switch tube and the third switch tube are all controlled by corresponding driving signals, if a closing signal is detected, the first switch tube is disconnected, then the duty ratio of the second driving signal and the duty ratio of the third driving signal are reduced until the duty ratio of the second driving signal and the duty ratio of the third driving signal are not more than a second preset duty ratio threshold, and then the second switch tube and the third switch tube are disconnected.
7. A control device based on a converter circuit, the converter circuit comprising: the current limiting circuit comprises a first switch tube, the push-pull circuit comprises a second switch tube, a third switch tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected with the input end of the current limiting circuit, the other end of the first switch tube is electrically connected with one end of the first inductor and one end of the second inductor respectively, one end of the second switch tube is electrically connected with the other end of the first inductor and the first output end of the push-pull circuit respectively, one end of the third switch tube is electrically connected with the other end of the second inductor and the second output end of the push-pull circuit respectively, and the control device comprises:
a control unit for: under the condition that the first switch tube, the second switch tube and the third switch tube are not controlled by corresponding driving signals, if a starting signal is detected, the second switch tube is controlled by a second driving signal and the third switch tube is controlled by a third driving signal, and then the first switch tube is controlled by a first driving signal;
the controlling the first switch tube with the first driving signal includes: increasing the duty ratio of the first driving signal until the duty ratio of the first driving signal is not less than a first preset duty ratio threshold.
8. A control apparatus based on a converter circuit, the converter circuit comprising: the current limiting circuit comprises a first switching tube, the push-pull circuit comprises a second switching tube, a third switching tube, a first inductor and a second inductor, one end of the first switch tube is electrically connected with the input end of the current limiting circuit, the other end of the first switch tube is respectively electrically connected with one end of the first inductor and one end of the second inductor, one end of the second switch tube is electrically connected with the other end of the first inductor and the first output end of the push-pull circuit respectively, one end of the third switching tube is electrically connected with the other end of the second inductor and the second output end of the push-pull circuit respectively, the control device comprises a memory storing a computer program and a processor implementing the steps of the method according to any one of claims 1 to 5 when the computer program is executed by the processor.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
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Address after: Beidou Industrial Park, Jinfeng Industrial Zone, Zhangzhou City, Fujian Province, China

Patentee after: ZHANGZHOU KEHUA TECHNOLOGY Co.,Ltd.

Patentee after: Kehua Data Co.,Ltd.

Address before: Beidou Industrial Park, Jinfeng Industrial Zone, Zhangzhou City, Fujian Province, China

Patentee before: ZHANGZHOU KEHUA TECHNOLOGY Co.,Ltd.

Patentee before: XIAMEN KEHUAHENGSHENG LIMITED BY SHARE Ltd.