CN116647126A - Resonant circuit control method and device, electronic equipment and storage medium - Google Patents

Resonant circuit control method and device, electronic equipment and storage medium Download PDF

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Publication number
CN116647126A
CN116647126A CN202310453701.XA CN202310453701A CN116647126A CN 116647126 A CN116647126 A CN 116647126A CN 202310453701 A CN202310453701 A CN 202310453701A CN 116647126 A CN116647126 A CN 116647126A
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China
Prior art keywords
switch unit
duty ratio
duration
comparison result
unit
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CN202310453701.XA
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Chinese (zh)
Inventor
王福强
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Lixun Precision Technology Xi'an Co ltd
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Lixun Precision Technology Xi'an Co ltd
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Priority to CN202310453701.XA priority Critical patent/CN116647126A/en
Publication of CN116647126A publication Critical patent/CN116647126A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0041—Control circuits in which a clock signal is selectively enabled or disabled
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/01—Resonant DC/DC converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The embodiment of the application discloses a method, a device, electronic equipment and a storage medium for controlling a resonant circuit, wherein the method, the device, the electronic equipment and the storage medium are used for acquiring the duration of a resonant period corresponding to the resonant circuit and calculating the threshold duration according to the duration; determining charge-discharge time length of the boosting unit in the resonance period, and comparing the charge-discharge time length with the threshold time length to obtain a comparison result; and adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the duty ratio of the driving signals is used for controlling the on-time of the switch units, and the duty ratio of the driving signals of the first switch unit and the second switch unit is adjusted according to the comparison result of the charge-discharge time and the threshold time, so that the charge state and the discharge state of the resonant circuit are adjusted, and the resonant circuit can control the gain effect according to the duty ratio of the driving signals of the first switch unit and the second switch unit.

Description

Resonant circuit control method and device, electronic equipment and storage medium
Technical Field
The present application relates to the field of voltage control technologies, and in particular, to a method and apparatus for controlling a resonant circuit, an electronic device, and a storage medium.
Background
An isolated DCDC (Direct Current/Direct Current) converter used in a portable energy storage product mostly adopts an LLC (Inductor-Capacitor Resonant Converter) circuit, in which an excitation inductance is provided, and in order to achieve higher discharge conversion efficiency, the excitation inductance is generally designed to be 10 times or more larger than the resonance inductance. This makes the circuit more like an LC (Inductor-Capacitor Resonant Converter) series resonant circuit when charging a battery, with relatively weak output voltage boost capability. In the discharging process of the battery, the exciting inductor does not participate in resonance, the DCDC converter works in an LC series resonance state, and the maximum voltage gain is 1. Thus, the DCDC converter in the portable energy storage product can be regarded as an LC resonant circuit. In the related art, the gain of the resonant circuit cannot be controlled, which results in the problem that the output voltage of the resonant circuit is not controlled.
Disclosure of Invention
The embodiment of the application provides a resonant circuit control method, a device, electronic equipment and a storage medium, which solve the problem that the output voltage of a resonant circuit is uncontrolled due to the fact that the gain of the resonant circuit cannot be controlled in the related technology.
Other features and advantages of the application will be apparent from the following detailed description, or may be learned by the practice of the application.
According to an aspect of an embodiment of the present application, there is provided a resonant circuit control method including: acquiring the duration of a resonance period corresponding to the resonance circuit, and calculating a threshold duration according to the duration; determining charge-discharge time length of the boosting unit in the resonance period, and comparing the charge-discharge time length with the threshold time length to obtain a comparison result; and adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the duty ratio of the driving signals is used for controlling the on-time of the switch units.
In some examples, the charge-discharge duration includes: the charge duration and the discharge duration, the charge and discharge duration of the boost unit in the resonance period is determined, and the charge and discharge duration and the threshold duration are compared to obtain a comparison result, which comprises the following steps: determining the charging duration and the discharging duration of the boosting unit in the resonance period; comparing the charging time length with the threshold time length to obtain a first comparison result; and comparing the discharge time length with the threshold time length to obtain a second comparison result.
In some examples, adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result includes: and if the first comparison result is that the charging time period is longer than the threshold time period, reducing the duty ratio of the first switch unit corresponding to the driving signal and increasing the duty ratio of the second switch unit corresponding to the driving signal.
In some examples, reducing the duty cycle of the first switching unit corresponding to the driving signal includes: and setting the duty ratio of the driving signal corresponding to the first switch unit to zero.
In some examples, adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result includes: and if the second comparison result is that the discharge time period is longer than the threshold time period, reducing the duty ratio of the second switch unit corresponding to the driving signal and increasing the duty ratio of the first switch unit corresponding to the driving signal.
In some examples, reducing the duty cycle of the second switching unit corresponding to the driving signal includes: and setting the duty ratio of the driving signal corresponding to the second switch unit to zero.
In some examples, the first switching unit includes at least one first switch and the second switching unit includes at least one second switch; and adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the method comprises the following steps: according to the comparison result, the duty ratios of the driving signals corresponding to all the first switches are adjusted, so that the duty ratios of the driving signals corresponding to all the first switches are the same; and adjusting the duty ratios of the driving signals corresponding to all the second switches according to the comparison result, so that the duty ratios of the driving signals corresponding to all the second switches are the same.
According to an aspect of an embodiment of the present application, there is provided a resonant circuit control device including: the acquisition module is used for acquiring the duration of the resonance period corresponding to the resonance circuit and calculating the threshold duration according to the duration; the determining module is used for determining the charge-discharge time length of the boosting unit in the resonance period and comparing the charge-discharge time length with the threshold time length to obtain a comparison result; and the adjusting module is used for adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the duty ratio of the driving signals is used for controlling the on-time of the switch units.
According to one aspect of an embodiment of the present application, an electronic device is provided, including one or more processors; storage means for storing one or more computer programs which, when executed by the one or more processors, cause the electronic device to implement the method as described above.
According to an aspect of an embodiment of the present application, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor of an electronic device, causes the electronic device to perform a method as described above.
In the technical scheme provided by the embodiment of the application, the duration of the resonance period corresponding to the resonance circuit is obtained, and the threshold duration is calculated according to the duration; determining charge-discharge time length of the boosting unit in the resonance period, and comparing the charge-discharge time length with the threshold time length to obtain a comparison result; and adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the duty ratio of the driving signals is used for controlling the on-time of the switch unit, and the duty ratio of the driving signals of the first switch unit and the second switch unit is adjusted according to the comparison result of the charge-discharge time and the threshold time, so that the charge state and the time length of the discharge state of the resonant circuit are adjusted, the resonant circuit can control the gain effect according to the duty ratio of the driving signals of the first switch unit and the second switch unit, the effect of controlling the boost voltage output by the resonant circuit according to the duty ratio of the driving signals of the first switch unit and the second switch unit is realized, and the problem that the gain of the resonant circuit cannot be controlled in related technologies, and the output voltage of the resonant circuit is uncontrolled is avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. In the drawings:
FIG. 1 is a basic flow chart of a method of resonant circuit control shown in an exemplary embodiment of the application;
FIG. 2 is a basic block diagram of a resonant circuit according to an exemplary embodiment of the present application;
FIG. 3 is a basic block diagram of a boost unit including two split resonant capacitors, shown in accordance with an exemplary embodiment of the present application;
FIG. 4 is a basic block diagram of an alternative resonant circuit shown in accordance with an exemplary embodiment of the present application;
FIG. 5 is a basic block diagram of yet another alternative resonant circuit shown in accordance with an exemplary embodiment of the present application;
FIG. 6 is a schematic diagram of the operational waveforms of the individual switches in a resonant circuit according to an exemplary embodiment of the present application;
fig. 7 is a basic structural view showing a full-bridge structure in which a single winding is employed at a battery side according to an exemplary embodiment of the present application;
FIG. 8 is a basic block diagram of yet another alternative resonant circuit shown in accordance with an exemplary embodiment of the present application;
FIG. 9 is a basic block diagram of yet another alternative resonant circuit shown in accordance with an exemplary embodiment of the present application;
FIG. 10 is a schematic diagram of the operational waveforms of the individual switches in yet another resonant circuit, shown in accordance with an exemplary embodiment of the present application;
FIG. 11 is a schematic diagram of the operational waveforms of the individual switches in yet another resonant circuit, shown in accordance with an exemplary embodiment of the present application;
FIG. 12 is a basic schematic of a resonant circuit control device according to an exemplary embodiment of the present application;
fig. 13 shows a schematic diagram of a computer system suitable for use in implementing an embodiment of the application.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the content and operations/, nor do they necessarily have to be performed in the order described. For example, some operations may be decomposed, and some operations may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
Also to be described is: in the present application, the term "plurality" means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., a and/or B may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
In order to solve the above technical problems, an embodiment of the present application provides a method for controlling a resonant circuit, as shown in fig. 1, where the method for controlling a resonant circuit includes:
S101, acquiring the duration of a resonance period corresponding to the resonance circuit, and calculating a threshold duration according to the duration;
s102, determining charge and discharge time length of the boost unit in the resonance period, and comparing the charge and discharge time length with the threshold time length to obtain a comparison result;
s103, adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the duty ratio of the driving signals is used for controlling the on-time of the switch units.
It can be appreciated that the method for controlling a resonant circuit provided in this example is applied to a resonant circuit, as shown in fig. 2, including: the device comprises a boosting unit 1, a first switch unit 2 and a second switch unit 3, wherein the boosting unit 1 enters a charging state if the second switch unit 3 is conducted, and the boosting unit 1 enters a discharging state if the first switch unit 2 is conducted;
on the support, as shown in fig. 2, the resonant circuit further comprises an inductance unit 4 and a capacitor C; if the second switch unit 3 is turned on, at this time, the inductance unit 4, the second switch unit 3 and the boost unit 1 together form a complete circuit, the inductance unit 4 starts to output a power supply voltage as an output end, and the power supply voltage charges the boost unit 1 through the second switch unit 3, at this time, the boost unit 1 enters a charging state.
If the first switch unit 2 is turned on, the inductance unit 4, the first switch unit 2 of the boost unit 1, the capacitor C and the output load Rload together form a complete circuit, the inductance unit 4 is used as an output end to start outputting the power supply voltage, the boost unit 1 enters a discharging state to output the storage voltage to the output load Rload, and the voltage received by the output load Rload is further the sum of the power supply voltage and the storage voltage.
It can be understood that in the resonant circuit, the capacitor and the inductor are connected in series, the capacitor discharges, the inductor starts to have a reverse recoil current, and the inductor charges; when the voltage of the inductor reaches the maximum, the capacitor is discharged, and then the inductor starts to discharge and the capacitor starts to charge, so that the reciprocating operation is called resonance. In the process, the inductance is charged and discharged continuously, so that electromagnetic waves are generated. The oscillation phenomenon of the circuit may gradually disappear or may be sustained constantly. When the oscillation is sustained, we refer to constant amplitude oscillation, also referred to as resonance. The period of the voltage change between the two ends of the capacitor or the inductor in the resonant period is called as the resonant period, and the method of determining the period of the resonant period is not limited in this embodiment, so that the person skilled in the art can flexibly select the period.
It can be appreciated that after determining the duration of the resonance period, the threshold duration can be determined according to the duration, and in some examples, the threshold duration is half of the duration, for example, the duration of the resonance period is denoted as T, and then the threshold duration is T/2.
It will be appreciated that the duty cycle refers to the percentage of the time the switching element is turned on over a duty cycle (here the duty cycle of the switching element is the resonant cycle described above). For example, if a switching element is turned on half the time in an operating cycle, the duty cycle of the switching element is 50%. The duty cycle is the ratio of the time that the load or circuit is on to the time that the load or circuit is off. A signal with a duty cycle of 60% will have the switching element on for 60% of the time and off for the other 40% of the time.
In some examples of this embodiment, the charge-discharge time period includes: the charge duration and the discharge duration, determining the charge and discharge duration of the boost unit 1 in the resonance period, comparing the charge and discharge duration with the threshold duration, and obtaining a comparison result, including:
Determining the charge duration and the discharge duration of the booster unit 1 in the resonance period;
comparing the charging time length with the threshold time length to obtain a first comparison result;
and comparing the discharge time length with the threshold time length to obtain a second comparison result.
It can be appreciated that the charge duration and the discharge duration are constantly smaller than the duration of the resonance period described above;
in some examples, the sum of the charge time length and the discharge time length is less than or equal to the time length of the resonance period described above, and in one period, the booster unit 1 is necessarily not in the discharge state when it is in the charge state, and the booster unit 1 is necessarily not in the charge state when it is in the discharge state. In some examples, the boosting unit 1 may not be in both the charge state and the discharge state.
The charging duration and the discharging duration of the boost unit 1 in the resonance period are determined, that is, the conducting duration of the first switch unit 2 and the second switch unit 3 in one resonance period is determined, and the charging duration and the discharging duration are further determined according to the determined conducting duration; for example, in one resonance period, the on-time of the first switch unit 2 is x, the on-time of the second switch unit 3 is y, and then the charge time of the boost unit 1 in one resonance period is y, and the discharge time is x;
After the charge duration and the discharge duration are determined, the charge duration and the discharge duration are respectively compared with the threshold time, and then a corresponding comparison result is obtained; for example, the charging duration of the boost unit 1 in one resonance period is y, the discharging duration is x, the threshold duration is z, y and z are compared, so as to obtain a first comparison result, and x and z are compared, so as to obtain a second comparison result.
It can be appreciated that in some examples, the above-described charge duration and discharge duration are the charge duration and the required discharge duration required by the booster unit 1 in one resonance period, instead of the actual charge duration and discharge duration of the booster unit 1 in one resonance period;
in some examples, the charge duration and the discharge duration related personnel determine the actual charge duration and the discharge duration of the boost unit 1 in one resonance period according to the operation condition of the resonance circuit.
In some examples of this embodiment, adjusting the duty ratio of the driving signals corresponding to the first switching unit 2 and the second switching unit 3 according to the comparison result includes:
and if the first comparison result is that the charging time period is longer than the threshold time period, reducing the duty ratio of the first switch unit 2 corresponding to the driving signal, and increasing the duty ratio of the second switch unit 3 corresponding to the driving signal.
If the first comparison result is that y is larger than z, the duty ratio of the driving signal corresponding to the first switch unit 2 is reduced, and the duty ratio of the driving signal corresponding to the second switch unit 3 is increased;
in connection with the above example, the present embodiment does not limit the manner of reducing or increasing the duty ratio of the driving signal, and the manner of reducing or increasing the duty ratio of the driving signal may be modified based on the duty ratio of the original driving signal, so as to reduce or increase the duty ratio of the driving signal. For example, the duty ratio of the driving signal corresponding to the original first switch unit 2 is 50%, and the duty ratio of the driving signal corresponding to the first switch unit 2 is reduced by thirty percent based on the current duty ratio, so that the duty ratio of the driving signal corresponding to the reduced first switch unit 2 is 35%; the duty ratio of the driving signal corresponding to the second switch unit 3 is increased by the same principle, the duty ratio of the driving signal corresponding to the original second switch unit 3 is 50%, and the duty ratio of the driving signal corresponding to the second switch unit 3 is increased by seventy percent based on the current duty ratio, so that the duty ratio of the driving signal corresponding to the increased second switch unit 3 is 85%;
the duty ratio of the driving signal is also reduced or increased by directly setting the duty ratio of the driving signal to a predetermined value; for example, the duty ratio of the driving signal corresponding to the first switch unit 2 is 50%, and the duty ratio of the driving signal corresponding to the first switch unit 2 is directly set to 30%, so that the duty ratio of the driving signal corresponding to the first switch unit 2 is reduced; the duty ratio of the driving signal corresponding to the second switch unit 3 is increased, the duty ratio of the driving signal corresponding to the original second switch unit 3 is 50%, and the duty ratio of the driving signal corresponding to the second switch unit 3 is directly set to be 70%, so that the duty ratio of the driving signal corresponding to the second switch unit 3 is increased.
In some examples of this embodiment, reducing the duty cycle of the corresponding driving signal of the first switching unit 2 further includes: the duty ratio of the driving signal corresponding to the first switching unit 2 is set to zero. It can be understood that, after the duty cycle of the first switching unit 2 is set to zero in one resonance period, the first switching unit 2 is always in an off state and is not turned on in the resonance period.
It can be appreciated that, in some examples, if the first comparison result is that the charging duration is less than the threshold duration, the duty cycle of the second switch unit 3 corresponding to the driving signal is reduced, or the duty cycle of the second switch unit 3 corresponding to the driving signal is maintained unchanged.
In some examples of this embodiment, adjusting the duty ratio of the driving signals corresponding to the first switching unit 2 and the second switching unit 3 according to the comparison result includes:
and if the second comparison result is that the discharge time period is longer than the threshold time period, reducing the duty ratio of the second switch unit 3 corresponding to the driving signal and increasing the duty ratio of the first switch unit 2 corresponding to the driving signal.
Setting the discharge time length as x and the threshold time length as z, if the second comparison result is that x is larger than z, reducing the duty ratio of the driving signal corresponding to the second switch unit 3, and increasing the duty ratio of the driving signal corresponding to the first switch unit 2;
In connection with the above example, the present embodiment does not limit the manner of reducing or increasing the duty ratio of the driving signal, and the manner of reducing or increasing the duty ratio of the driving signal may be modified based on the duty ratio of the original driving signal, so as to reduce or increase the duty ratio of the driving signal. For example, the duty ratio of the driving signal corresponding to the original second switch unit 3 is 50%, and the duty ratio of the driving signal corresponding to the second switch unit 3 is reduced by thirty percent based on the current duty ratio, so that the duty ratio of the driving signal corresponding to the reduced second switch unit 3 is 35%; the duty ratio of the driving signal corresponding to the first switch unit 2 is increased by the same principle, the duty ratio of the driving signal corresponding to the original first switch unit 2 is 50%, and the duty ratio of the driving signal corresponding to the first switch unit 2 is increased by seventy percent based on the current duty ratio, so that the duty ratio of the driving signal corresponding to the increased first switch unit 2 is 85%;
the duty ratio of the driving signal is also reduced or increased by directly setting the duty ratio of the driving signal to a predetermined value; for example, the duty ratio of the driving signal corresponding to the original second switch unit 3 is 50%, and the duty ratio of the driving signal corresponding to the second switch unit 3 is directly set to 30%, so that the duty ratio of the driving signal corresponding to the second switch unit 3 is reduced; the duty ratio of the driving signal corresponding to the first switch unit 2 is increased, the duty ratio of the driving signal corresponding to the original first switch unit 2 is 50%, and the duty ratio of the driving signal corresponding to the first switch unit 2 is directly set to be 70%, so that the duty ratio of the driving signal corresponding to the first switch unit 2 is increased.
In some examples of the present embodiment, reducing the duty ratio of the second switching unit 3 corresponding to the driving signal further includes: the duty ratio of the driving signal corresponding to the second switching unit 3 is set to zero. It can be understood that, after the duty cycle of the second switching unit 3 is set to zero in one resonance period, the second switching unit 3 is always in an off state and is not turned on in the resonance period.
It can be appreciated that, in some examples, if the second comparison result is that the charging duration is less than the threshold duration, the duty cycle of the first switch unit 2 corresponding to the driving signal is reduced, or the duty cycle of the first switch unit 2 corresponding to the driving signal is maintained unchanged.
It can be understood that, in some examples of the present embodiment, the boost unit 1 includes at least one resonant inductor lr and at least one resonant capacitor cr, as shown in fig. 3, fig. 3 is a basic schematic diagram of the boost unit 1 including two split resonant capacitors, and the resonant circuit shown in fig. 3 is a half-bridge LC resonant circuit using the split resonant capacitors, where the resonance control method provided in this example is equally applicable to the half-bridge LC resonant circuit using the split resonant capacitors.
In some examples of this embodiment, the first switching unit 2 comprises at least one first switch and the second switching unit 3 comprises at least one second switch; the step of adjusting the duty ratio of the driving signals corresponding to the first switch unit 2 and the second switch unit 3 according to the comparison result includes:
according to the comparison result, the duty ratios of the driving signals corresponding to all the first switches are adjusted, so that the duty ratios of the driving signals corresponding to all the first switches are the same;
and adjusting the duty ratios of the driving signals corresponding to all the second switches according to the comparison result, so that the duty ratios of the driving signals corresponding to all the second switches are the same.
It can be understood that the present embodiment does not limit the kind of the resonant circuit, for example, the resonant circuit is a half-bridge LC resonant circuit or an LLC resonant circuit, as shown in fig. 3, where the first switch unit 2 includes only one first switch Q1, and the second switch unit 3 includes only one second switch Q2; it can be appreciated that one end of the resonant circuit resonator may be a half-bridge LC resonant circuit of a positive bus or an LLC resonant circuit, as shown in fig. 4;
It can be understood that, as shown in fig. 5, the resonant circuit may also be an LC (or LLC) resonant circuit with a full-bridge circuit at the high voltage side, in which the first switch unit 2 has a first switch Q1 and a first switch Q4, the second switch unit 3 has a second switch Q2 and a second switch Q3, the duty ratio of the Q1 driving signal and the Q4 driving signal is the same (i.e., the driving signals of Q1 and Q4 are the same), the duty ratio of the Q2 driving signal and the Q3 driving signal is the same (i.e., the driving signals of Q2 and Q3 are the same), so the operating current of Q1 and Q4 is the same, and the operating current of Q2 and Q3 is the same. In some examples, as shown in fig. 6, the driving signals vgs_q1 and vgs_q4 with relatively small duty cycle may be in a low-level state, without affecting the output voltage gain.
In some examples, in products with larger power, the battery side adopts a single-winding full-bridge structure, as shown in fig. 7, and at this time, the resonant circuit control method provided in this example is also applicable to the battery side.
In some examples, as shown in fig. 8, the resonant circuit is a three-phase LC or LLC or CLLC resonant circuit, wherein the first switching unit 2 comprises first switches Q1, Q3 and Q5; the second switching unit 3 comprises first and second switches Q2, Q4 and Q6, and the resonant circuit is based on the same principle, which is equally applicable to the resonant circuit control method described above.
The resonant circuit control method provided by the embodiment comprises the following steps: acquiring the duration of a resonance period corresponding to the resonance circuit, and calculating a threshold duration according to the duration; determining charge-discharge time length of the boosting unit in the resonance period, and comparing the charge-discharge time length with the threshold time length to obtain a comparison result; and adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the duty ratio of the driving signals is used for controlling the on-time of the switch unit, and the duty ratio of the driving signals of the first switch unit and the second switch unit is adjusted according to the comparison result of the charge-discharge time and the threshold time, so that the charge state and the time length of the discharge state of the resonant circuit are adjusted, the resonant circuit can control the gain effect according to the duty ratio of the driving signals of the first switch unit and the second switch unit, the effect of controlling the boost voltage output by the resonant circuit according to the duty ratio of the driving signals of the first switch unit and the second switch unit is realized, and the problem that the gain of the resonant circuit cannot be controlled in related technologies, and the output voltage of the resonant circuit is uncontrolled is avoided.
In order to better understand the present invention, this embodiment provides a more specific example for explaining the present invention, and this example provides a resonant circuit control method applied to a resonant circuit, where the resonant circuit is shown in fig. 9, and fig. 9 is a basic schematic diagram of the resonant circuit, and includes an inductance unit, a boost unit, a first switch unit, a second switch unit, and a capacitor C; the boost unit comprises a resonant capacitor and a resonant inductor, the first switch unit comprises a first switch, and the second switch unit comprises a second switch; the resonant circuit control method comprises the following steps:
the resonant circuit control method provided by the example improves the output voltage by adjusting the duty ratio of the Q1 and Q2 driving signals, for example, reduces the duty ratio of the Q1 driving signal, increases the duty ratio of the Q2, gradually increases the output voltage with the increase of the duty ratio of the Q2, and increases the gain (higher than 1), so that the required output voltage can be obtained by controlling the duty ratio of the Q2. The operating currents and drive signals for Q1 and Q2 are shown in fig. 7.
Wherein, Q1 is cut off, Q2 is conducted, and current flows to one end of the transformer, namely the other end of the transformer, namely the Q2-Lr-Cr-R-load-transformer, so as to charge the capacitor Cr.
Q1 is conducted, Q2 is cut off, current flows to the other end of the transformer, namely the Cr-Lr-Q1-R-load-transformer, and voltage received by the load end is the sum of voltage of the transformer and voltage of Cr. The larger the duty cycle, the longer the turn-on time is.
Wherein, when the charge time of Cr is greater than 50% of the period T, as shown in fig. 10, the duty ratio of the Q1 driving signal is reduced (30%), while the duty ratio of Q2 is increased (70%), increasing the time to charge Cr.
Wherein, when the discharge time of Cr is greater than 50% of the period T, the duty ratio of the Q2 driving signal is reduced (30%), and the duty ratio of the Q1 is increased (70%), so that the discharge time of Cr capacitor to load is increased.
It should be noted that the driving signal with smaller duty ratio is not necessary, and may be in a low level state all the time, the switching tube only has a body diode to work, no influence on the gain of the output voltage, taking Cr charging time greater than 50% of the period T as an example, the duty ratio of the driving signal of Q1 may be set to 0, as shown in fig. 11.
Based on the same technical concept, the present embodiment further provides a resonant circuit control device, as shown in fig. 12, including:
the acquisition module 1 is used for acquiring the duration of the resonance period corresponding to the resonance circuit and calculating the threshold duration according to the duration;
A determining module 2, configured to determine a charge-discharge time length of the boost unit in the resonance period, and compare the charge-discharge time length with the threshold time length to obtain a comparison result;
and the adjusting module 3 is used for adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the duty ratio of the driving signals is used for controlling the on-time of the switch units.
In some examples, the charge-discharge duration includes: the charge duration and the discharge duration, the charge and discharge duration of the boost unit in the resonance period is determined, and the charge and discharge duration and the threshold duration are compared to obtain a comparison result, which comprises the following steps: determining the charging duration and the discharging duration of the boosting unit in the resonance period; comparing the charging time length with the threshold time length to obtain a first comparison result; and comparing the discharge time length with the threshold time length to obtain a second comparison result.
In some examples, adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result includes: and if the first comparison result is that the charging time period is longer than the threshold time period, reducing the duty ratio of the first switch unit corresponding to the driving signal and increasing the duty ratio of the second switch unit corresponding to the driving signal.
In some examples, reducing the duty cycle of the first switching unit corresponding to the driving signal includes: and setting the duty ratio of the driving signal corresponding to the first switch unit to zero.
In some examples, adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result includes: and if the second comparison result is that the discharge time period is longer than the threshold time period, reducing the duty ratio of the second switch unit corresponding to the driving signal and increasing the duty ratio of the first switch unit corresponding to the driving signal.
In some examples, reducing the duty cycle of the second switching unit corresponding to the driving signal includes: and setting the duty ratio of the driving signal corresponding to the second switch unit to zero.
In some examples, the first switching unit includes at least one first switch and the second switching unit includes at least one second switch; and adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the method comprises the following steps: according to the comparison result, the duty ratios of the driving signals corresponding to all the first switches are adjusted, so that the duty ratios of the driving signals corresponding to all the first switches are the same; and adjusting the duty ratios of the driving signals corresponding to all the second switches according to the comparison result, so that the duty ratios of the driving signals corresponding to all the second switches are the same.
It should be understood that, each module combination of the resonant circuit control device provided in this embodiment can implement each step of the resonant circuit control method, so as to achieve the same technical effects as each step of the resonant circuit control method, which is not described herein again.
The embodiment of the application also provides an electronic device comprising one or more processors, and a storage device, wherein the storage device is used for storing one or more computer programs, and when the one or more computer programs are executed by the one or more processors, the electronic device is enabled to realize the resonant circuit control method.
Fig. 13 shows a schematic diagram of a computer system suitable for use in implementing an embodiment of the application.
It should be noted that, the computer system 1800 of the electronic device shown in fig. 13 is only an example, and should not impose any limitation on the functions and the application scope of the embodiments of the present application.
As shown in fig. 13, the computer system 1800 includes a processor (Central Processing Unit, CPU) 1801, which can perform various appropriate actions and processes, such as performing the methods in the above-described embodiments, according to a program stored in a Read-Only Memory (ROM) 1802 or a program loaded from a storage section 1808 into a random access Memory (Random Access Memory, RAM) 1803. In the RAM 1803, various programs and data required for system operation are also stored. The CPU 1801, ROM 1802, and RAM 1803 are connected to each other via a bus 1804. An Input/Output (I/O) interface 1805 is also connected to the bus 1804.
In some embodiments, the following components are connected to the I/O interface 1805: an input section 1806 including a keyboard, a mouse, and the like; an output portion 1807 including a Cathode Ray Tube (CRT), a liquid crystal display (Liquid Crystal Display, LCD), and a speaker, etc.; a storage portion 1808 including a hard disk or the like; and a communication section 1809 including a network interface card such as a LAN (Local Area Network ) card, a modem, or the like. The communication section 1809 performs communication processing via a network such as the internet. The drive 1810 is also connected to the I/O interface 1805 as needed. A removable medium 1811 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is installed as needed in the drive 1810, so that a computer program read therefrom is installed as needed in the storage portion 1808.
In particular, according to embodiments of the present application, the process described above with reference to the flowcharts may be implemented as a computer program. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising a computer program for performing the method shown in the flowchart. In such embodiments, the computer program may be downloaded and installed from a network via the communication portion 1809, and/or installed from the removable medium 1811. The computer programs, when executed by the processor (CPU) 1801, perform the various functions defined in the system of the present application.
It should be noted that, the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium may be, for example, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-Only Memory (ROM), an erasable programmable read-Only Memory (Erasable Programmable Read Only Memory), a flash Memory, an optical fiber, a portable compact disc read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, a computer-readable signal medium may comprise a data signal propagated in baseband or as part of a carrier wave, with a computer-readable computer program embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. A computer program embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. Where each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer programs.
The units or modules involved in the embodiments of the present application may be implemented in software, or may be implemented in hardware, and the described units or modules may also be disposed in a processor. Where the names of the units or modules do not in some way constitute a limitation of the units or modules themselves.
Another aspect of the application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a resonant circuit control method as before. The computer-readable storage medium may be included in the electronic device described in the above embodiment or may exist alone without being incorporated in the electronic device.
Another aspect of the present application also provides a computer program product comprising a computer program stored in a computer readable storage medium. The processor of the electronic device reads the computer program from the computer-readable storage medium, and the processor executes the computer program to cause the electronic device to execute the resonant circuit control method provided in the above-described respective embodiments.
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.
The foregoing is merely illustrative of the preferred embodiments of the present application and is not intended to limit the embodiments of the present application, and those skilled in the art can easily make corresponding variations or modifications according to the main concept and spirit of the present application, so that the protection scope of the present application shall be defined by the claims.

Claims (10)

1. A resonance circuit control method applied to a resonance circuit, the resonance circuit comprising: the control method of the resonant circuit comprises the steps of a boosting unit, a first switch unit and a second switch unit, wherein if the second switch unit is conducted, the boosting unit enters a charging state, and if the first switch unit is conducted, the boosting unit enters a discharging state, and the control method of the resonant circuit is characterized by comprising the following steps:
Acquiring the duration of a resonance period corresponding to the resonance circuit, and calculating a threshold duration according to the duration;
determining charge-discharge time length of the boosting unit in the resonance period, and comparing the charge-discharge time length with the threshold time length to obtain a comparison result;
and adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the duty ratio of the driving signals is used for controlling the on-time of the switch units.
2. The method of claim 1, wherein the charge-discharge duration comprises: the charge duration and the discharge duration, the charge and discharge duration of the boost unit in the resonance period is determined, and the charge and discharge duration and the threshold duration are compared to obtain a comparison result, which comprises the following steps:
determining the charging duration and the discharging duration of the boosting unit in the resonance period;
comparing the charging time length with the threshold time length to obtain a first comparison result;
and comparing the discharge time length with the threshold time length to obtain a second comparison result.
3. The method of claim 2, wherein adjusting the duty cycle of the corresponding drive signals of the first and second switching units according to the comparison result comprises:
And if the first comparison result is that the charging time period is longer than the threshold time period, reducing the duty ratio of the first switch unit corresponding to the driving signal and increasing the duty ratio of the second switch unit corresponding to the driving signal.
4. The method of claim 2, wherein reducing the duty cycle of the first switching unit corresponding to the drive signal comprises:
and setting the duty ratio of the driving signal corresponding to the first switch unit to zero.
5. The method of claim 2, wherein adjusting the duty cycle of the corresponding drive signals of the first and second switching units according to the comparison result comprises:
and if the second comparison result is that the discharge time period is longer than the threshold time period, reducing the duty ratio of the second switch unit corresponding to the driving signal and increasing the duty ratio of the first switch unit corresponding to the driving signal.
6. The method of claim 2, wherein reducing the duty cycle of the second switching unit corresponding to the drive signal comprises:
and setting the duty ratio of the driving signal corresponding to the second switch unit to zero.
7. The method according to claim 1 or 2, wherein the first switching unit comprises at least one first switch and the second switching unit comprises at least one second switch; and adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the method comprises the following steps:
according to the comparison result, the duty ratios of the driving signals corresponding to all the first switches are adjusted, so that the duty ratios of the driving signals corresponding to all the first switches are the same;
and adjusting the duty ratios of the driving signals corresponding to all the second switches according to the comparison result, so that the duty ratios of the driving signals corresponding to all the second switches are the same.
8. A resonant circuit control device, the device comprising:
the acquisition module is used for acquiring the duration of the resonance period corresponding to the resonance circuit and calculating the threshold duration according to the duration;
the determining module is used for determining the charge-discharge time length of the boosting unit in the resonance period and comparing the charge-discharge time length with the threshold time length to obtain a comparison result;
And the adjusting module is used for adjusting the duty ratio of the driving signals corresponding to the first switch unit and the second switch unit according to the comparison result, wherein the duty ratio of the driving signals is used for controlling the on-time of the switch units.
9. An electronic device, comprising:
one or more processors;
storage means for storing one or more programs that, when executed by the one or more processors, cause the electronic device to perform the method of any of claims 1-7.
10. A computer readable storage medium, having stored thereon a computer program which, when executed by a processor of an electronic device, causes the electronic device to perform the method of any of claims 1 to 7.
CN202310453701.XA 2023-04-24 2023-04-24 Resonant circuit control method and device, electronic equipment and storage medium Pending CN116647126A (en)

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Applications Claiming Priority (1)

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