CN114567145A - Control method and controller of resonant circuit and resonant circuit - Google Patents
Control method and controller of resonant circuit and resonant circuit Download PDFInfo
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- CN114567145A CN114567145A CN202210096060.2A CN202210096060A CN114567145A CN 114567145 A CN114567145 A CN 114567145A CN 202210096060 A CN202210096060 A CN 202210096060A CN 114567145 A CN114567145 A CN 114567145A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention provides a control method of a resonant circuit, a controller and the resonant circuit. The method comprises the following steps: acquiring preset given values and acquisition values of target electrical parameters of the resonant circuit, and determining evaluation values of the target electrical parameters according to the acquisition values; the evaluation value is used for determining the control precision of the target electrical parameter with a preset given value; determining a final given value of the target electrical parameter according to a preset given value and an evaluation value; and determining the control quantity of the target electrical parameter by taking the final set value as an input and the acquired value as a feedback, and controlling the resonant circuit according to the control quantity so as to enable the acquired value to be the same as the preset set value. The invention can improve the stability of the resonant circuit.
Description
Technical Field
The invention relates to the technical field of resonant circuits, in particular to a control method of a resonant circuit, a controller and the resonant circuit.
Background
As a common resonant conversion circuit, the resonant circuit is suitable for high-frequency and high-power-density design and is applied to many power supply devices.
The resonant circuit generally adopts Pulse Frequency Modulation (PFM) to control output, and has the characteristics that the larger the frequency is, the smaller the gain is. When the output load is light, the required frequency is very high, and since the power tube frequency cannot be set too high, the minimum gain is mostly reduced to the minimum by means of hiccup. However, the adoption of hiccup to control the resonant circuit can cause the output accuracy of the resonant circuit to be unable to meet the requirement.
Disclosure of Invention
The embodiment of the invention provides a control method of a resonant circuit, a controller and the resonant circuit, and aims to solve the problem that the output precision of the resonant circuit cannot meet the requirement due to the fact that the resonant circuit is controlled in a hiccup mode.
In a first aspect, the present invention provides a method for controlling a resonant circuit, including:
acquiring preset given values and acquisition values of target electrical parameters of the resonant circuit, and determining evaluation values of the target electrical parameters according to the acquisition values; the evaluation value is used for determining the control precision of the target electrical parameter with a preset given value;
determining a final given value of the target electrical parameter according to a preset given value and an evaluation value;
and determining the control quantity of the target electrical parameter by taking the final set value as an input and the acquired value as a feedback, and controlling the resonant circuit according to the control quantity so as to enable the acquired value to be the same as the preset set value.
In one possible implementation, determining a final set value of the target electrical parameter according to the preset set value and the evaluation value includes:
calculating a first difference value between a preset given value and an evaluation value, and inputting the first difference value into a first PI controller to obtain a compensation value of a target electrical parameter;
and calculating the sum of the preset given value and the compensation value to obtain the final given value of the target electrical parameter.
In one possible implementation manner, the determining the control quantity of the target electrical parameter by taking the final given value as an input and the acquired value as a feedback comprises the following steps:
and calculating a second difference value between the final set value and the acquired value, and inputting the second difference value into a second PI controller to obtain the control quantity of the target electrical parameter.
In one possible implementation, the target electrical parameter includes an output current.
In a possible implementation manner, before determining the control quantity of the target electrical parameter according to the preset given value of the target electrical parameter and the evaluation value of the target electrical parameter, the method further includes:
and averaging the acquired values of the target electrical parameters in preset time, and taking the average value as an evaluation value of the target electrical parameters.
In one possible implementation, controlling the resonant circuit according to the control quantity includes:
and inputting the control quantity into a PWM signal generator to obtain a PWM wave, and controlling the resonant circuit according to the PWM wave.
In a second aspect, the present invention provides a control apparatus for a resonant circuit, comprising:
the acquisition module is used for acquiring a preset given value and a collection value of a target electrical parameter of the resonant circuit and determining an evaluation value of the target electrical parameter according to the collection value; the evaluation value is used for determining the control precision of the target electrical parameter with a preset given value;
The calculation module is used for determining a final given value of the target electrical parameter according to a preset given value and the evaluation value;
and the control module is used for determining the control quantity of the target electrical parameter by taking the final set value as input and the acquired value as feedback, and controlling the resonant circuit according to the control quantity so as to enable the acquired value to be the same as the preset set value.
In a third aspect, the present invention provides a controller comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the method for controlling a resonant circuit as described above in the first aspect or any one of the possible implementations of the first aspect when executing the computer program.
In a fourth aspect, the present invention provides a resonant circuit comprising a controller and a resonant circuit as in the third aspect above; the resonant circuit is controlled by a controller.
In a fifth aspect, the present invention provides a computer-readable storage medium, in which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method for controlling a resonant circuit according to the first aspect or any one of the possible implementations of the first aspect.
The embodiment of the invention provides a control method of a resonant circuit, a controller and the resonant circuit, wherein a preset given value and a collection value of a target electrical parameter of the resonant circuit are obtained; determining a final given value of the target electrical parameter according to a preset given value and an evaluation value of the target electrical parameter; use final given value as input, collection value as the feedback, confirm the controlled quantity of target electrical parameter to according to controlled quantity resonant circuit, so that the collection value is the same with the preset given value, through revising preset given value, can guarantee resonant circuit's output precision when hiccup, and then improve resonant circuit's stability, guarantee that consumer normally works.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a control loop of a prior art resonant circuit;
fig. 2 is a flowchart illustrating an implementation of a method for controlling a resonant circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a control loop provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a control device of a resonant circuit according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a controller provided in an embodiment of the invention.
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 invention. It will be apparent, however, to one skilled in the art that the present invention 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 invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, a schematic diagram of a control loop of a prior art resonant circuit is shown. As shown in fig. 1, Io is an output current value of the resonant circuit, Io _ ref is a given current value of the resonant circuit, and the control loop takes Io _ ref as an input and Io as a feedback, sequentially passes through a subtractor, a PI controller and a signal generator Kpwm, obtains a PWM wave for controlling the switching frequency of the resonant circuit, and controls the resonant circuit according to the PWM wave so that Io is equal to Io _ ref.
However, when the output load is light, the required frequency is very high, and since the power tube frequency cannot be set too high, the minimum gain is mostly minimized by burping, and when the resonant circuit is controlled by burping, the control loop shown in fig. 1 is biased, which causes Io and Io _ ref to be unequal. For example, Io _ ref is 25A, but the actual Io is not adjusted to 25A, so that the output accuracy of the resonant circuit is not as good as required.
To solve the above problem, an embodiment of the present invention provides a method for controlling a resonant circuit.
As shown in fig. 2, which shows a flowchart of an implementation of a method for controlling a resonant circuit according to an embodiment of the present invention, a method for controlling a resonant circuit may include:
S101, acquiring a preset given value and a collection value of a target electrical parameter of the resonant circuit, and determining an evaluation value of the target electrical parameter according to the collection value; the evaluation value is used for determining the control precision of the target electrical parameter with a preset given value.
Optionally, the resonant circuit may be an LLC resonant circuit. An LLC is a single port network comprising inductive, capacitive, and resistive elements, and at some operating frequencies, when the phases of the port voltage and current waveforms are the same, the circuit is said to resonate. A circuit that can resonate is called a resonant circuit.
Optionally, the collected value of the target electrical parameter may be a collected value of a current working cycle. The electrical parameter of the resonant circuit may comprise an output electrical parameter such as output current, output voltage or output power. The target electrical parameter of the resonant circuit may be an output current of the resonant circuit.
Optionally, the collected value of the target electrical parameter may be obtained through the electrical parameter collecting circuit, and the target electrical parameter is collected at a certain preset frequency. Or directly reading the acquisition value of the target electrical parameter from the corresponding chip, and specifically selecting the acquisition value according to the actual situation.
For example, the output current of the resonant circuit may be collected by the current collecting circuit to obtain a collected value of the output current. Or, the output voltage of the resonant circuit is collected through the voltage collecting circuit to obtain a collected value of the output voltage, and the like.
Optionally, the preset given value of the target electrical parameter may be a preset given value of the current working cycle. The preset given value of the target electrical parameter is also the value to which the target electrical parameter is expected to be adjusted. The evaluation value of the target electrical parameter may be determined based on the collected value. For example, the evaluation value of the target electrical parameter may be a collected value, or may be an average value of the collected values within a preset time period. The evaluation value can evaluate the control accuracy of the target electrical parameter.
Illustratively, when the target parameter is the output current, the control accuracy of the target electrical parameter is the current stabilization accuracy of the output current, and the current stabilization accuracy described below is the control accuracy when the target parameter is the output current. And when the target parameter is the output voltage, the control precision of the target electrical parameter is the voltage stabilization precision of the output voltage.
And S102, determining the final set value of the target electrical parameter according to the preset set value and the evaluation value.
Optionally, the preset given value may be modified according to the evaluation value, so as to obtain a final given value of the target electrical parameter, and finally make the collected value of the target electrical parameter equal to the preset given value. The final given value of the target electrical parameter is a value obtained by correcting the preset given value according to the evaluation value.
When the resonance circuit is controlled by utilizing a hiccup mode, the preset given value of the target electrical parameter and the acquired value of the target electrical parameter may not be equal, the preset given value of the target electrical parameter can be corrected by introducing the evaluation value of the target electrical parameter, and then the preset given value of the target electrical parameter and the acquired value of the target electrical parameter are ensured to be equal.
And S103, determining the control quantity of the target electrical parameter by taking the final set value as input and the acquired value as feedback, and controlling the resonant circuit according to the control quantity so as to enable the acquired value to be the same as the preset set value.
And taking the final set value as an input and the acquired value as a feedback, obtaining the control quantity of the target electrical parameter through a control loop of the resonant circuit, and further controlling the switching frequency of the resonant circuit through the control quantity so as to enable the acquired value to be the same as the preset set value.
Optionally, the same acquisition value as the preset given value does not necessarily mean complete equality, but means that the acquisition value tracks the preset given value in real time, the acquisition value may fluctuate within a certain range of the preset given value, and the difference between the acquisition value and the preset given value may reflect the output accuracy of the resonant circuit.
Illustratively, when the target electrical parameter is output current, the method is:
Firstly, acquiring the acquisition value of the current working period output current of the resonant circuit.
And then, determining a feedback value of the current working period output current according to the acquired value, and correcting a preset given value of the current working period output current according to the feedback value to obtain a final given value of the current working period output current.
And finally, taking the final set value of the current working period as input, taking the acquisition value of the current working period as feedback, determining the control quantity of the output current through a control loop of the resonant circuit, and controlling the resonant circuit according to the control quantity so as to enable the acquisition value of the output current of the next working period to be the same as the preset set value of the current working period. That is, the current value of the output current of the next working cycle is the same as the preset given value of the current working cycle.
The working period is described above only for reasonably understanding the method of the embodiment of the present invention, and in the actual working process, the working frequency of the resonant circuit is fast, the acquisition frequency is also very high, the change of the working period can be almost ignored, and the working period can be approximately considered to be in the same working period.
According to the embodiment of the invention, the preset given value of the target electrical parameter of the resonant circuit is corrected, so that the output precision of the resonant circuit can be improved, the working stability of the resonant circuit is improved, and the practical value is very high.
Referring to fig. 3, a schematic diagram of a control loop provided by the embodiment of the invention is shown. Wherein, Mo is a collection value of a target electrical parameter of the resonant circuit, Mo _ ref is a preset given value of the target electrical parameter of the resonant circuit, Mo _ display is an evaluation value of the target electrical parameter of the resonant circuit, and the control frequency may be 60K.
In some embodiments of the present invention, the "determining the final given value of the target electrical parameter according to the preset given value and the evaluation value" in S102 may include:
calculating a first difference value between a preset given value and an evaluation value, and inputting the first difference value into a first PI controller to obtain a compensation value of a target electrical parameter;
and calculating the sum of the preset given value and the compensation value to obtain the final given value of the target electrical parameter.
Optionally, as shown in fig. 3, the preset given value of the target electrical parameter and the evaluation value of the target electrical parameter are input into a first subtractor to obtain a first difference. And inputting the first difference value into a first PI controller to obtain a compensation value of the target electrical parameter. And inputting the preset given value and the compensation value into an adder, and taking the obtained sum as the final given value of the target electrical parameter.
The first difference value can reflect the precision of the resonant circuit, and through experiments, Mo _ display tracking Mo _ ref can be achieved by adopting the above method, so that the output precision is improved, and the precision of the resonant circuit can be improved to 0.01%.
In some embodiments of the present invention, the determining the control amount of the target electrical parameter by using the final set value as the input and the collected value as the feedback in S103 may include:
and calculating a second difference value between the final set value and the acquired value, and inputting the second difference value into a second PI controller to obtain the control quantity of the target electrical parameter.
Optionally, referring to fig. 3, the final given value and the collected value are input to a second subtractor to obtain a second difference, and the second difference is input to a second PI controller to obtain a controlled variable of the target electrical parameter, so that the final given value in Mo tracking can be realized, and the collected value of the target electrical parameter is ensured to be the same as the preset given value.
In some embodiments of the present invention, the controlling the resonant circuit according to the control amount in S103 may include:
and inputting the control quantity into a PWM signal generator to obtain a PWM wave, and controlling the resonant circuit according to the PWM wave.
Optionally, as shown in fig. 3, the control amount is input to the PWM signal generator Kpwm to obtain a PWM wave corresponding to the target electrical parameter, and the resonant circuit is controlled according to the PWM wave, so that the acquisition value of the target electrical parameter is the same as the preset given value, and the working reliability of the resonant circuit is ensured.
In some embodiments of the invention, the target electrical parameter may comprise an output current. Correspondingly, the output precision of the resonant circuit is the current stabilization precision, the acquisition value is the acquisition value of the output current, the preset given value is the preset given value of the output current, the feedback value is the feedback value of the output current, and the final given value is the final given value of the output current.
In some embodiments of the invention, determining the evaluation value of the target electrical parameter from the collected values comprises:
and averaging the acquired values of the target electrical parameters in preset time, and taking the average value as an evaluation value of the target electrical parameters.
Optionally, the collected value may be directly used as a feedback value, or the collected values of the target electrical parameter for a preset time period may be averaged, and the average value is used as an evaluation value of the target electrical parameter. For example, the collected values within 10ms may be averaged as a feedback value, and the feedback may be used to perform feedback compensation on a preset given value.
Referring to fig. 3, as an example, the target electrical parameter is an output current, and it is assumed that a preset given value Mo _ ref of the output current is 25A. If the compensation loop of the evaluation value of the output current is not increased, the output current of the resonant circuit at the hiccup may be 28A, that is, Mo is 28A. At this time, the output current is not equal to the preset given value, and the output current error D is (25-28)/25 is-12%.
When the compensation loop of the evaluation value of the output current is increased, assuming that the evaluation value Mo _ display is determined to be 28A according to the output current, Mo _ ref and Mo _ display are subjected to difference and input to the first PI controller to obtain a compensation value of the output current, and then the sum of Mo _ ref and the compensation value is calculated to obtain a final given value.
For example, the final given value is 22A. The current value of the output current can be controlled to 25.1A with 22A as the final set point and Mo 28A as the feedback, and the output current error D is (25-25.1)/25-0.4%. As can be seen, the evaluation value Mo _ display can guarantee the accuracy of the output current.
When the output current is stabilized to be near 25A, the evaluation value changes along with the collection value of the output current, Mo _ display is 25A, at the moment, Mo _ display is 25A, the compensation loop of the evaluation value is input, the difference value between the evaluation value and the preset given value is zero, the final given value is calculated to be 25A, and the output current is controlled to be stabilized to be 25A. By adding the compensation loop of the evaluation value, the output of the resonant circuit can be ensured to be stable both when burping and when not burping.
According to the embodiment of the invention, the preset given value of the resonant circuit is corrected, so that the output current stabilization precision of the resonant circuit can be improved, the unstable working condition during hiccup is eliminated, the electric equipment is ensured to be normal, and the working reliability of the resonant circuit is improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The following are embodiments of the apparatus of the invention, reference being made to the corresponding method embodiments described above for details which are not described in detail therein.
Fig. 4 is a schematic structural diagram of a control device of a resonant circuit according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and detailed descriptions are as follows:
as shown in fig. 4, the control device 20 of the resonant circuit may include:
an obtaining module 201, configured to obtain a preset given value and a collected value of a target electrical parameter of the resonant circuit, and determine an evaluation value of the target electrical parameter according to the collected value; the evaluation value is used for determining the control precision of the target electrical parameter with a preset given value;
the calculation module 202 is used for determining a final given value of the target electrical parameter according to a preset given value and an evaluation value;
and the control module 203 is used for determining the control quantity of the target electrical parameter by taking the final set value as input and the acquired value as feedback, and controlling the resonant circuit according to the control quantity so as to enable the acquired value to be the same as the preset set value.
In some embodiments of the invention, the calculation module 202 may include:
the first calculation unit is used for calculating a first difference value between a preset given value of the target electrical parameter and an evaluation value of the target electrical parameter, and inputting the first difference value into the first PI controller to obtain a compensation value of the target electrical parameter;
and the second calculating unit is used for calculating the sum of the preset given value and the compensation value to obtain the final given value of the target electrical parameter.
In some embodiments of the invention, the control module 203 may include:
and the third calculating unit is used for calculating a second difference value of the final set value and the acquired value, and inputting the second difference value into the second PI controller to obtain the control quantity of the target electrical parameter.
In some embodiments of the invention, the target electrical parameter comprises an output current.
In some embodiments of the present invention, the obtaining module 201 is further configured to average the collected values of the target electrical parameter for a preset time period, and use the average value as the evaluation value of the target electrical parameter.
In some embodiments of the present invention, the control module 203 may further comprise:
and the control unit is used for inputting the control quantity into the PWM signal generator to obtain PWM waves and controlling the resonant circuit according to the PWM waves.
Fig. 5 is a schematic diagram of a controller provided in an embodiment of the invention. As shown in fig. 5, the controller 30 of this embodiment includes: a processor 300, a memory 301, and a computer program 302 stored in the memory 301 and executable on the processor 300. The steps in the above-described embodiments of the control method of the respective resonance circuits, e.g. S101 to S103 shown in fig. 2, are implemented when the processor 300 executes the computer program 302. Alternatively, the processor 300, when executing the computer program 302, implements the functions of the modules/units in the above-described device embodiments, such as the functions of the modules/units 201 to 203 shown in fig. 4.
Illustratively, the computer program 302 may be partitioned into one or more modules/units, which are stored in the memory 301 and executed by the processor 300 to implement the present invention. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions that describe the execution of the computer program 302 in the controller 30. For example, the computer program 302 may be divided into the modules/units 201 to 203 shown in fig. 4.
The controller 30 may be a computing device such as a desktop computer, a notebook, a palm top computer, and a cloud server. The controller 30 may include, but is not limited to, a processor 300, a memory 301. Those skilled in the art will appreciate that fig. 5 is merely an example of the controller 30, and does not constitute a limitation on the controller 30, and may include more or fewer components than shown, or combine certain components, or different components, e.g., the controller may also include input-output devices, network access devices, buses, etc.
The Processor 300 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 301 may be an internal storage unit of the controller 30, such as a hard disk or a memory of the controller 30. The memory 301 may also be an external storage device of the controller 30, such as a plug-in hard disk provided on the controller 30, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 301 may also include both an internal storage unit of the controller 30 and an external storage device. The memory 301 is used to store computer programs and other programs and data required by the controller. The memory 301 may also be used to temporarily store data that has been output or is to be output.
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 function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. 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. For the specific working processes of the units and modules in the system, reference may be made to the corresponding processes in the foregoing method embodiments, which are not described herein again.
The embodiment of the invention also provides a resonant circuit, which comprises the controller 30 and the resonant circuit; the resonant circuit is controlled by a controller 30.
In the above embodiments, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described or recited in any embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps 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 technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/controller and method may be implemented in other manners. For example, the above-described apparatus/controller embodiments are merely illustrative, and for example, a division of modules or units is merely a logical division, and an actual implementation may have 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. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the above embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium and used for instructing related hardware, and when the computer program is executed by a processor, the steps of the embodiments of the control method for each resonant circuit may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may include any suitable increase or decrease as required by legislation and patent practice in the jurisdiction, for example, in some jurisdictions, computer readable media may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention 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 invention, and they should be construed as being included therein.
Claims (10)
1. A method of controlling a resonant circuit, comprising:
acquiring a preset given value and a collection value of a target electrical parameter of the resonant circuit, and determining an evaluation value of the target electrical parameter according to the collection value; the evaluation value is used for determining the control precision of the target electrical parameter with the preset given value;
determining a final given value of the target electrical parameter according to the preset given value and the evaluation value;
and determining the control quantity of the target electrical parameter by taking the final set value as input and the acquired value as feedback, and controlling the resonant circuit according to the control quantity so as to enable the acquired value to be the same as the preset set value.
2. The method for controlling a resonant circuit according to claim 1, wherein said determining a final set value of said target electrical parameter from said preset set value and said evaluation value comprises:
calculating a first difference value between the preset given value and the evaluation value, and inputting the first difference value into a first PI controller to obtain a compensation value of the target electrical parameter;
and calculating the sum of the preset given value and the compensation value to obtain the final given value of the target electrical parameter.
3. The method for controlling the resonant circuit according to claim 1, wherein the determining the control quantity of the target electrical parameter with the final set value as an input and the collected value as a feedback comprises:
and calculating a second difference value between the final given value and the acquired value, and inputting the second difference value into a second PI controller to obtain the control quantity of the target electrical parameter.
4. The method according to any one of claims 1 to 3, wherein the target electrical parameter comprises an output current.
5. The method according to any one of claims 1 to 3, wherein the determining the evaluation value of the target electrical parameter based on the acquired value comprises:
And averaging the acquired values of the target electrical parameters in preset time, and taking the average value as an evaluation value of the target electrical parameters.
6. A control method of a resonance circuit according to any one of claims 1 to 3, said controlling the resonance circuit according to the control amount, comprising:
and inputting the control quantity into a PWM signal generator to obtain a PWM wave, and controlling the resonant circuit according to the PWM wave.
7. A control device for a resonant circuit, comprising:
the acquisition module is used for acquiring a preset given value and a collection value of a target electrical parameter of the resonant circuit and determining an evaluation value of the target electrical parameter according to the collection value; the evaluation value is used for determining the control precision of the target electrical parameter with the preset given value;
the calculation module is used for determining a final given value of the target electrical parameter according to the preset given value and the evaluation value;
and the control module is used for determining the control quantity of the target electrical parameter by taking the final set value as input and the acquired value as feedback, and controlling the resonant circuit according to the control quantity so as to enable the acquired value to be the same as the preset set value.
8. A controller comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method of controlling a resonant circuit as claimed in any one of the preceding claims 1 to 6 when executing the computer program.
9. A resonant circuit comprising the controller of claim 8 and the resonant circuit; the resonant circuit is controlled by the controller.
10. 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 for controlling a resonant circuit according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210096060.2A CN114567145A (en) | 2022-01-26 | 2022-01-26 | Control method and controller of resonant circuit and resonant circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210096060.2A CN114567145A (en) | 2022-01-26 | 2022-01-26 | Control method and controller of resonant circuit and resonant circuit |
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| Publication Number | Publication Date |
|---|---|
| CN114567145A true CN114567145A (en) | 2022-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210096060.2A Pending CN114567145A (en) | 2022-01-26 | 2022-01-26 | Control method and controller of resonant circuit and resonant circuit |
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| Country | Link |
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| CN (1) | CN114567145A (en) |
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2022
- 2022-01-26 CN CN202210096060.2A patent/CN114567145A/en active Pending
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