CN116780908A - Control method and device of test equipment based on LCC resonant converter - Google Patents
Control method and device of test equipment based on LCC resonant converter Download PDFInfo
- Publication number
- CN116780908A CN116780908A CN202310773219.4A CN202310773219A CN116780908A CN 116780908 A CN116780908 A CN 116780908A CN 202310773219 A CN202310773219 A CN 202310773219A CN 116780908 A CN116780908 A CN 116780908A
- Authority
- CN
- China
- Prior art keywords
- resonant converter
- module
- lcc resonant
- modulation signal
- module lcc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 230000007306 turnover Effects 0.000 claims description 20
- 238000005070 sampling Methods 0.000 claims description 13
- 230000009977 dual effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The application provides a control method and a device of test equipment based on an LCC resonant converter, wherein the method comprises the following steps: calculating error quantity of the LCC resonant converters of the two modules, and obtaining a first modulation signal and a second modulation signal through dual-carrier hybrid control; acquiring adjustment amounts of the LCC resonant converter of the first module and the LCC resonant converter of the second module; obtaining conduction angle modulation signals of the first module LCC resonant converter and the second module LCC resonant converter; obtaining a third modulation signal and a fourth modulation signal through staggered control; and further control of the two-module switching tube is realized. By implementing the embodiment of the application, the first modulation signal and the second modulation signal are obtained through dual-carrier hybrid control, so that the voltage equalizing between the LCC resonant converters of the modules is realized, then the output voltage ripple is reduced through output interleaving control, and the converters can realize zero-voltage soft switching of the switching tube under wider working conditions and reduce the variation range of the switching frequency.
Description
Technical Field
The application relates to the field of control of resonant converter testing equipment, in particular to a control method and a device of testing equipment based on an LCC resonant converter.
Background
With the development of power control technology and novel power devices, high-voltage high-frequency high-power supplies are widely applied. The power supply has the advantages of high power density, high overall efficiency, low output voltage ripple and the like, and can effectively improve the output voltage and the power level of the power supply and reduce the power stress of components on the basis of adopting a modularized technology. And particularly for high-voltage and high-power application scenarios, the LCC resonant converter topology of the input-parallel output series (IPOS) can be considered.
The traditional control method for the IPOS LCC resonant converter topology structure is mainly double-loop control. Although the double-loop control method can realize staggered control and voltage equalizing, the switching frequency and the conduction angle of the double-loop control method are mutually independent and cannot be adapted, so that the difficulty of realizing soft switching under wide input and wide load is high, and the double-loop control method is not suitable for the occasion work under wide working conditions.
Disclosure of Invention
The application provides a control method and a control device of test equipment based on an LCC resonant converter, which are used for solving the technical problem that the difficulty in realizing soft switching under wide input and wide load in the prior art is high.
In order to solve the technical problems, the embodiment of the application provides a control method of test equipment based on an LCC resonant converter, wherein the test equipment comprises two modules of LCC resonant converters and a driving circuit, and the two modules of LCC resonant converters comprise a first module of LCC resonant converter, a second module of LCC resonant converter and a load;
the control method comprises the following steps:
sampling output voltages of the LCC resonant converters of the two modules, calculating error amount between the output voltages and preset reference voltages, performing P I adjustment on the error amount, and obtaining a first modulation signal and a second modulation signal through dual-carrier hybrid control; the first modulation signal is a peak value of a carrier wave and is used for controlling the switching frequency, and the second modulation signal is a modulation signal of a conduction angle under a reference parameter;
obtaining the output voltage of the first module LCC resonant converter and the output voltage of the second module LCC resonant converter, and further obtaining the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter; superposing the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter with the second modulation signal respectively to obtain a conduction angle modulation signal of the first module LCC resonant converter and a conduction angle modulation signal of the second module LCC resonant converter;
performing staggered control on the first modulation signal and a conduction angle modulation signal of the first module LCC resonant converter to obtain a third modulation signal of the first module LCC resonant converter and a fourth modulation signal of the second module LCC resonant converter; and inputting the third modulation signal, the fourth modulation signal, the conduction angle modulation signal of the second module LCC resonant converter and the first modulation signal into the driving circuit to obtain driving signals of all switching tubes, so as to control the switching tubes of the first module LCC resonant converter and the switching tubes of the second module LCC resonant converter.
As a preferable solution, the controlling the switching tube of the first module LCC resonant converter and the switching tube of the second module LCC resonant converter specifically includes:
when the carrier signal is larger than or equal to the conduction angle modulation signal of the second module LCC resonant converter and smaller than the third modulation signal, controlling the leading bridge arm switching tube of the second module LCC resonant converter to turn over;
when the carrier signal is larger than or equal to the third modulation signal and smaller than the fourth modulation signal, controlling a lagging bridge arm switching tube of the first module LCC resonant converter to turn over;
when the carrier signal is larger than or equal to the fourth modulation signal and smaller than the first modulation signal, controlling a leading bridge arm switching tube of the first module LCC resonant converter to turn over;
and when the carrier signal is greater than or equal to the first modulation signal, controlling a hysteresis bridge arm switching tube of the second module LCC resonant converter to turn over.
Preferably, the third modulation signal V t The method comprises the following steps:
fourth modulated signal V e3 The method comprises the following steps:
wherein V is m For the first modulated signal, the V e1 -modulating a signal for a conduction angle of the first module LCC resonant converter.
Preferably, the obtaining the adjustment amount of the first module LCC resonant converter and the adjustment amount of the second module LCC resonant converter specifically includes:
calculating to obtain the error amount of the first module LCC resonant converter according to the output voltage of the first module LCC resonant converter and the reference voltage of the first module LCC resonant converter; calculating to obtain the error amount of the second module LCC resonant converter according to the output voltage of the second module LCC resonant converter and the reference voltage of the second module LCC resonant converter;
and adjusting the error amount of the first module LCC resonant converter and the error amount of the second module LCC resonant converter to P I respectively to obtain the adjustment amount of the first module LCC resonant converter and the adjustment amount of the second module LCC resonant converter respectively.
Preferably, the reference voltage of the first module LCC resonant converter and the reference voltage of the second module LCC resonant converter are set according to the output voltages of the two module LCC resonant converters.
Correspondingly, the embodiment of the application provides a control device of test equipment based on an LCC resonant converter, wherein the test equipment comprises two LCC resonant converters and a driving circuit, and the two LCC resonant converters comprise a first LCC resonant converter, a second LCC resonant converter and a load;
the control device comprises a sampling module, a superposition module and a control module; wherein,,
the sampling module is used for sampling the output voltages of the LCC resonant converters of the two modules, calculating the error amount between the output voltages and a preset reference voltage, performing P I adjustment on the error amount, and obtaining a first modulation signal and a second modulation signal through dual-carrier hybrid control; the first modulation signal is a peak value of a carrier wave and is used for controlling the switching frequency, and the second modulation signal is a modulation signal of a conduction angle under a reference parameter;
the superposition module is used for obtaining the output voltage of the first module LCC resonant converter and the output voltage of the second module LCC resonant converter, and further obtaining the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter; superposing the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter with the second modulation signal respectively to obtain a conduction angle modulation signal of the first module LCC resonant converter and a conduction angle modulation signal of the second module LCC resonant converter;
the control module is used for performing staggered control on the first modulation signal and the conduction angle modulation signal of the first module LCC resonant converter to obtain a third modulation signal of the first module LCC resonant converter and a fourth modulation signal of the second module LCC resonant converter; and inputting the third modulation signal, the fourth modulation signal, the conduction angle modulation signal of the second module LCC resonant converter and the first modulation signal into the driving circuit to obtain driving signals of all switching tubes, so as to control the switching tubes of the first module LCC resonant converter and the switching tubes of the second module LCC resonant converter.
As a preferred solution, the control module controls the switching tube of the first module LCC resonant converter and the switching tube of the second module LCC resonant converter, specifically:
when the carrier signal is larger than or equal to the conduction angle modulation signal of the second module LCC resonant converter and smaller than the third modulation signal, the control module controls the leading bridge arm switching tube of the second module LCC resonant converter to turn over;
when the carrier signal is larger than or equal to the third modulation signal and smaller than the fourth modulation signal, the control module controls a lagging bridge arm switching tube of the first module LCC resonant converter to turn over;
when the carrier signal is larger than or equal to the fourth modulation signal and smaller than the first modulation signal, the control module controls the leading bridge arm switching tube of the first module LCC resonant converter to turn over;
when the carrier signal is greater than or equal to the first modulation signal, the control module controls the lagging bridge arm switching tube of the second module LCC resonant converter to turn over.
Preferably, the third modulation signal V t The method comprises the following steps:
fourth modulated signal V e3 The method comprises the following steps:
wherein V is m For the first modulated signal, the V e1 -modulating a signal for a conduction angle of the first module LCC resonant converter.
As a preferred solution, the superposition module obtains an adjustment amount of the LCC resonant converter of the first module and an adjustment amount of the LCC resonant converter of the second module, specifically:
the superposition module calculates and obtains the error quantity of the first module LCC resonant converter according to the output voltage of the first module LCC resonant converter and the reference voltage of the first module LCC resonant converter; calculating to obtain the error amount of the second module LCC resonant converter according to the output voltage of the second module LCC resonant converter and the reference voltage of the second module LCC resonant converter;
and adjusting the error amount of the first module LCC resonant converter and the error amount of the second module LCC resonant converter to P I respectively to obtain the adjustment amount of the first module LCC resonant converter and the adjustment amount of the second module LCC resonant converter respectively.
Preferably, the reference voltage of the first module LCC resonant converter and the reference voltage of the second module LCC resonant converter are set according to the output voltages of the two module LCC resonant converters.
Compared with the prior art, the embodiment of the application has the following beneficial effects:
the embodiment of the application provides a control method and a control device of test equipment based on an LCC resonant converter, wherein the test equipment comprises two modules of LCC resonant converters and a driving circuit, and the two modules of LCC resonant converters comprise a first module of LCC resonant converter, a second module of LCC resonant converter and a load; the control method comprises the following steps: sampling output voltages of the LCC resonant converters of the two modules, calculating error amount between the output voltages and preset reference voltages, performing P I adjustment on the error amount, and obtaining a first modulation signal and a second modulation signal through dual-carrier hybrid control; the first modulation signal is a peak value of a carrier wave and is used for controlling the switching frequency, and the second modulation signal is a modulation signal of a conduction angle under a reference parameter; obtaining the output voltage of the first module LCC resonant converter and the output voltage of the second module LCC resonant converter, and further obtaining the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter; superposing the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter with the second modulation signal respectively to obtain a conduction angle modulation signal of the first module LCC resonant converter and a conduction angle modulation signal of the second module LCC resonant converter; performing staggered control on the first modulation signal and a conduction angle modulation signal of the first module LCC resonant converter to obtain a third modulation signal of the first module LCC resonant converter and a fourth modulation signal of the second module LCC resonant converter; and inputting the third modulation signal, the fourth modulation signal, the conduction angle modulation signal of the second module LCC resonant converter and the first modulation signal into the driving circuit to obtain driving signals of all switching tubes, so as to control the switching tubes of the first module LCC resonant converter and the switching tubes of the second module LCC resonant converter. By implementing the embodiment of the application, the first modulation signal and the second modulation signal are obtained through dual-carrier hybrid control, so that the modulation signals of the switching frequency and the conduction angle under the reference parameter are obtained, the voltage equalizing between the LCC resonant converters of the modules is realized, and then the output voltage ripple is reduced through output interleaving control.
Drawings
Fig. 1: a flow diagram of one embodiment of a method of controlling a test apparatus provided for an LCC-based resonant converter of the present application.
Fig. 2: a schematic diagram of the control principle of an embodiment of the control method of the test device provided for the LCC-based resonant converter of the present application.
Fig. 3: a schematic topology of one embodiment of the test apparatus provided for the LCC-based resonant converter of the present application.
Fig. 4: a schematic diagram of the control principle of another embodiment of the control method of the test device provided for the LCC-based resonant converter of the present application.
Fig. 5: a schematic waveform of an output voltage for the control method of the present application based on the non-interleaved control provided by the LCC resonant converter.
Fig. 6: a waveform schematic of an output voltage for an LCC resonant converter-based control method of the present application is provided.
Fig. 7: the waveform diagram of an output voltage provided for the LCC-based resonant converter is provided when resonant inductances are different.
Fig. 8: the zero-voltage soft switching waveform schematic diagram of the first module LCC resonant converter is provided by the application.
Fig. 9: the second module LCC resonant converter provided by the application is a zero-voltage soft switching waveform schematic diagram.
Fig. 10: a schematic structural diagram of one embodiment of a control device for a test apparatus provided for an LCC-based resonant converter of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1
Referring to fig. 1 and fig. 2, a control method of a sensor testing device for a direct current distribution network based on a parallel output serial (I POS) LCC resonant converter according to an embodiment of the present application is shown in fig. 3, where a topology structure diagram of the testing device includes two LCC resonant convertersAnd a drive circuit, wherein the two-module LCC resonant converter comprises a first module LCC resonant converter, a second module LCC resonant converter and a load R L The method comprises the steps of carrying out a first treatment on the surface of the The control method comprises the steps of S1 to S3; wherein,,
step S1, sampling output voltages of the LCC resonant converters of the two modules, calculating error amounts between the output voltages and preset reference voltages, performing PI adjustment on the error amounts, and obtaining a first modulation signal and a second modulation signal through dual carrier hybrid control; the first modulation signal is a peak value of a carrier wave and is used for controlling the switching frequency, and the second modulation signal is a modulation signal of a conduction angle under a reference parameter.
Step S2, obtaining the output voltage of the first module LCC resonant converter and the output voltage of the second module LCC resonant converter, and further obtaining the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter; and respectively superposing the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter with the second modulation signal to obtain a conduction angle modulation signal of the first module LCC resonant converter and a conduction angle modulation signal of the second module LCC resonant converter.
Step S3, conducting angle modulation signals of the first module LCC resonant converter and the first modulation signal are subjected to staggered control, and a third modulation signal of the first module LCC resonant converter and a fourth modulation signal of the second module LCC resonant converter are obtained; and inputting the third modulation signal, the fourth modulation signal, the conduction angle modulation signal of the second module LCC resonant converter and the first modulation signal into the driving circuit to obtain driving signals of all switching tubes, so as to control the switching tubes of the first module LCC resonant converter and the switching tubes of the second module LCC resonant converter.
In this embodiment, the control flow and principle can also refer to fig. 2, and the output voltage of the sampled two-module LCC resonant converter is V o The total reference voltage is V ref Calculating the outputVoltage V o And a preset reference voltage V ref The error amount between the two modulation signals is regulated by P I and then calculated by adopting double carrier mixed control to obtain two modulation signals which are respectively the first modulation signal V m And a second modulation signal V n 。
Alternatively, the reference voltage of the first module LCC resonant converter and the reference voltage of the second module LCC resonant converter may be based on the output voltage V of the two module LCC resonant converters o Setting is performed. For example, V o And/2 is used as a reference voltage of the first module LCC resonant converter and the second module LCC resonant converter.
Respectively let the reference voltage V o Output voltage V of/2 and first module LCC resonant converter o1 And the output voltage V of the second module LCC resonant converter o2 Comparing, calculating and obtaining the error amount of the first module LCC resonant converter and the error amount of the second module LCC resonant converter, and performing P I adjustment on the error amount of the first module LCC resonant converter and the error amount of the second module LCC resonant converter to obtain adjustment amounts DeltaV of the first module LCC resonant converter respectively e1 And the adjustment amount DeltaV of the second module LCC resonant converter e2 . In the process of combining two adjustment amounts with V n After superposition, the conduction angle modulation signals V of the LCC resonant converter of the first module are respectively obtained e1 And the conduction angle modulation signal V of the second module LCC resonant converter e2 。
The first modulation signal V m And the conduction angle modulation signal V of the first module LCC resonant converter e1 Performing interleaving control to obtain a third modulation signal V of the LCC resonant converter of the first module t And a fourth modulation signal V e3 . The third modulation signal V t Said fourth modulated signal V e3 Conduction angle modulation signal V of LCC resonant converter of second module e2 And the first modulation signal V m Input to the driving circuit to obtain all switching tubes S 1 To S 8 Thereby realizing a switching tube S of the LCC resonant converter of the first module 1 To S 4 And a switching tube S of said second module LCC resonant converter 5 To S 8 And controlling.
As a preferred embodiment, the third modulation signal V t The method comprises the following steps:
fourth modulated signal V e3 The method comprises the following steps:
wherein V is m For the first modulated signal, the V e1 -modulating a signal for a conduction angle of the first module LCC resonant converter.
Further, referring to fig. 4, the controlling the switching tube of the first module LCC resonant converter and the switching tube of the second module LCC resonant converter specifically includes:
when the carrier wave signal v saw A conduction angle modulation signal V of the second module LCC resonant converter is larger than or equal to e2 (not shown) and smaller than the third modulation signal V t When in use, the leading bridge arm switch tube S of the second module LCC resonant converter is controlled 5 And S is 6 Turning over;
when the carrier signal is greater than or equal to the third modulation signal V t And is smaller than the fourth modulation signal V e3 When in use, the hysteresis bridge arm switch tube S of the LCC resonant converter of the first module is controlled 3 And S is 4 Turning over;
when the carrier signal is greater than or equal to the fourth modulation signal V e3 And is smaller than the first modulation signal V m When in use, the leading bridge arm switch tube S of the LCC resonant converter of the first module is controlled 1 And S is 2 Turning over;
when the carrier signal is greater than or equal to the first modulation signal V m When controlling the second module LCC resonanceHysteretic bridge arm switching tube S of vibration converter 7 And S is 8 And (5) overturning. Although V is shown in FIG. 4 e Rather than V e2 The figure is presented by way of example as a single-module LCC resonant converter, and is therefore in fact V e2 。
By implementing the embodiment of the application, the switching frequency f under the reference parameter can be obtained through the voltage stabilizing ring s And the conduction angle delta. Equalizing rings are formed by adjusting the conduction angle delta of each module LCC resonant converter i The voltage is equalized between the first module LCC resonant converter and the second module LCC resonant converter, after which the output voltage ripple is reduced by the interleaving control. Compared with the traditional double-loop control method, the control method can enable the converter to realize zero-voltage soft switching of the switching tube under wider working conditions and reduce the switching frequency variation range. Fig. 5 and 6 are waveforms of output voltages without and with the interleaving control. As can be seen by comparing the two waveforms, the total output voltage ripple is not staggered to be 7.96V, but the staggered control output voltage ripple is 1.02V. As can be seen from FIG. 7, when the resonant inductances are different, the overall module achieves voltage equalizing control, interleaving control and voltage stabilizing output. According to fig. 8 and 9, the switching tubes of each module also realize zero-voltage soft switching (i Lr1 For the first module resonant current, v AB1 Exciting a voltage, i, for a first module Lr2 Resonant current sum v for the second module AB2 Energizing the voltage for the second module).
Correspondingly, referring to fig. 10, an embodiment of the present application provides a control device of a testing apparatus based on an LCC resonant converter, where the testing apparatus includes a two-module LCC resonant converter and a driving circuit, and the two-module LCC resonant converter includes a first module LCC resonant converter, a second module LCC resonant converter, and a load;
the control device comprises a sampling module 101, a superposition module 102 and a control module 103; wherein,,
the sampling module 101 is configured to sample output voltages of the LCC resonant converters of the two modules, calculate an error amount between the output voltages and a preset reference voltage, adjust the error amount P I, and obtain a first modulation signal and a second modulation signal through dual carrier mixing control; the first modulation signal is a peak value of a carrier wave and is used for controlling the switching frequency, and the second modulation signal is a modulation signal of a conduction angle under a reference parameter;
the superposition module 102 is configured to obtain an output voltage of the first module LCC resonant converter and an output voltage of the second module LCC resonant converter, so as to obtain an adjustment amount of the first module LCC resonant converter and an adjustment amount of the second module LCC resonant converter; superposing the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter with the second modulation signal respectively to obtain a conduction angle modulation signal of the first module LCC resonant converter and a conduction angle modulation signal of the second module LCC resonant converter;
the control module 103 is configured to perform staggered control on the first modulation signal and a conduction angle modulation signal of the first module LCC resonant converter, so as to obtain a third modulation signal of the first module LCC resonant converter and a fourth modulation signal of the second module LCC resonant converter; and inputting the third modulation signal, the fourth modulation signal, the conduction angle modulation signal of the second module LCC resonant converter and the first modulation signal into the driving circuit to obtain driving signals of all switching tubes, so as to control the switching tubes of the first module LCC resonant converter and the switching tubes of the second module LCC resonant converter.
As a preferred solution, the control module 103 controls the switching tube of the first module LCC resonant converter and the switching tube of the second module LCC resonant converter, specifically:
when the carrier signal is greater than or equal to the conduction angle modulation signal of the second module LCC resonant converter and less than the third modulation signal, the control module 103 controls the leading bridge arm switching tube of the second module LCC resonant converter to turn over;
when the carrier signal is greater than or equal to the third modulation signal and less than the fourth modulation signal, the control module 103 controls the lagging bridge arm switching tube of the first module LCC resonant converter to turn over;
when the carrier signal is greater than or equal to the fourth modulation signal and less than the first modulation signal, the control module 103 controls the leading leg switching tube of the first module LCC resonant converter to turn over;
when the carrier signal is greater than or equal to the first modulation signal, the control module 103 controls the lagging bridge arm switching tube of the second module LCC resonant converter to turn over.
Preferably, the third modulation signal V t The method comprises the following steps:
fourth modulated signal V e3 The method comprises the following steps:
wherein V is m For the first modulated signal, the V e1 -modulating a signal for a conduction angle of the first module LCC resonant converter.
Preferably, the superposition module 102 obtains an adjustment amount of the first module LCC resonant converter and an adjustment amount of the second module LCC resonant converter, specifically:
the superposition module 102 calculates and obtains the error amount of the first module LCC resonant converter according to the output voltage of the first module LCC resonant converter and the reference voltage of the first module LCC resonant converter; calculating to obtain the error amount of the second module LCC resonant converter according to the output voltage of the second module LCC resonant converter and the reference voltage of the second module LCC resonant converter;
and adjusting the error amount of the first module LCC resonant converter and the error amount of the second module LCC resonant converter to P I respectively to obtain the adjustment amount of the first module LCC resonant converter and the adjustment amount of the second module LCC resonant converter respectively.
Preferably, the reference voltage of the first module LCC resonant converter and the reference voltage of the second module LCC resonant converter are set according to the output voltages of the two module LCC resonant converters.
Compared with the prior art, the embodiment of the application has the following beneficial effects:
the embodiment of the application provides a control method and a control device of test equipment based on an LCC resonant converter, wherein the test equipment comprises two modules of LCC resonant converters and a driving circuit, and the two modules of LCC resonant converters comprise a first module of LCC resonant converter, a second module of LCC resonant converter and a load; the control method comprises the following steps: sampling output voltages of the LCC resonant converters of the two modules, calculating error amount between the output voltages and preset reference voltages, performing P I adjustment on the error amount, and obtaining a first modulation signal and a second modulation signal through dual-carrier hybrid control; the first modulation signal is a peak value of a carrier wave and is used for controlling the switching frequency, and the second modulation signal is a modulation signal of a conduction angle under a reference parameter; obtaining the output voltage of the first module LCC resonant converter and the output voltage of the second module LCC resonant converter, and further obtaining the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter; superposing the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter with the second modulation signal respectively to obtain a conduction angle modulation signal of the first module LCC resonant converter and a conduction angle modulation signal of the second module LCC resonant converter; performing staggered control on the first modulation signal and a conduction angle modulation signal of the first module LCC resonant converter to obtain a third modulation signal of the first module LCC resonant converter and a fourth modulation signal of the second module LCC resonant converter; and inputting the third modulation signal, the fourth modulation signal, the conduction angle modulation signal of the second module LCC resonant converter and the first modulation signal into the driving circuit to obtain driving signals of all switching tubes, so as to control the switching tubes of the first module LCC resonant converter and the switching tubes of the second module LCC resonant converter. By implementing the embodiment of the application, the first modulation signal and the second modulation signal are obtained through dual-carrier hybrid control, so that the modulation signals of the switching frequency and the conduction angle under the reference parameter are obtained, the voltage equalizing between the LCC resonant converters of the modules is realized, and then the output voltage ripple is reduced through output interleaving control.
The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present application, and are not to be construed as limiting the scope of the application. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present application are intended to be included in the scope of the present application.
Claims (10)
1. The control method of the test equipment based on the LCC resonant converter is characterized in that the test equipment comprises two LCC resonant converters and a driving circuit, wherein the two LCC resonant converters comprise a first LCC resonant converter, a second LCC resonant converter and a load;
the control method comprises the following steps:
sampling output voltages of the LCC resonant converters of the two modules, calculating error amount between the output voltages and preset reference voltages, performing PI adjustment on the error amount, and obtaining a first modulation signal and a second modulation signal through dual-carrier hybrid control; the first modulation signal is a peak value of a carrier wave and is used for controlling the switching frequency, and the second modulation signal is a modulation signal of a conduction angle under a reference parameter;
obtaining the output voltage of the first module LCC resonant converter and the output voltage of the second module LCC resonant converter, and further obtaining the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter; superposing the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter with the second modulation signal respectively to obtain a conduction angle modulation signal of the first module LCC resonant converter and a conduction angle modulation signal of the second module LCC resonant converter;
performing staggered control on the first modulation signal and a conduction angle modulation signal of the first module LCC resonant converter to obtain a third modulation signal of the first module LCC resonant converter and a fourth modulation signal of the second module LCC resonant converter; and inputting the third modulation signal, the fourth modulation signal, the conduction angle modulation signal of the second module LCC resonant converter and the first modulation signal into the driving circuit to obtain driving signals of all switching tubes, so as to control the switching tubes of the first module LCC resonant converter and the switching tubes of the second module LCC resonant converter.
2. The method for controlling a test apparatus based on an LCC resonant converter according to claim 1, wherein the controlling the switching tube of the first module LCC resonant converter and the switching tube of the second module LCC resonant converter comprises:
when the carrier signal is larger than or equal to the conduction angle modulation signal of the second module LCC resonant converter and smaller than the third modulation signal, controlling the leading bridge arm switching tube of the second module LCC resonant converter to turn over;
when the carrier signal is larger than or equal to the third modulation signal and smaller than the fourth modulation signal, controlling a lagging bridge arm switching tube of the first module LCC resonant converter to turn over;
when the carrier signal is larger than or equal to the fourth modulation signal and smaller than the first modulation signal, controlling a leading bridge arm switching tube of the first module LCC resonant converter to turn over;
and when the carrier signal is greater than or equal to the first modulation signal, controlling a hysteresis bridge arm switching tube of the second module LCC resonant converter to turn over.
3. A control method of a test device based on an LCC resonant converter according to claim 2, wherein the third modulation signal V t The method comprises the following steps:
fourth modulated signal V e3 The method comprises the following steps:
wherein V is m For the first modulated signal, the V e1 -modulating a signal for a conduction angle of the first module LCC resonant converter.
4. A control method of a test device based on an LCC resonant converter according to claim 3, wherein said obtaining the adjustment of the LCC resonant converter of the first module and the adjustment of the LCC resonant converter of the second module is specifically:
calculating to obtain the error amount of the first module LCC resonant converter according to the output voltage of the first module LCC resonant converter and the reference voltage of the first module LCC resonant converter; calculating to obtain the error amount of the second module LCC resonant converter according to the output voltage of the second module LCC resonant converter and the reference voltage of the second module LCC resonant converter;
and carrying out PI adjustment on the error amount of the first module LCC resonant converter and the error amount of the second module LCC resonant converter to obtain the adjustment amount of the first module LCC resonant converter and the adjustment amount of the second module LCC resonant converter respectively.
5. A control method of a test device based on an LCC resonant converter according to any one of claims 1 to 4, wherein the reference voltage of the first module LCC resonant converter and the reference voltage of the second module LCC resonant converter are set according to the output voltages of the two module LCC resonant converters.
6. The control device of the test equipment based on the LCC resonant converter is characterized by comprising a two-module LCC resonant converter and a driving circuit, wherein the two-module LCC resonant converter comprises a first module LCC resonant converter, a second module LCC resonant converter and a load;
the control device comprises a sampling module, a superposition module and a control module; wherein,,
the sampling module is used for sampling the output voltages of the LCC resonant converters of the two modules, calculating the error amount between the output voltages and a preset reference voltage, performing PI adjustment on the error amount, and obtaining a first modulation signal and a second modulation signal through dual carrier mixing control; the first modulation signal is a peak value of a carrier wave and is used for controlling the switching frequency, and the second modulation signal is a modulation signal of a conduction angle under a reference parameter;
the superposition module is used for obtaining the output voltage of the first module LCC resonant converter and the output voltage of the second module LCC resonant converter, and further obtaining the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter; superposing the adjustment quantity of the first module LCC resonant converter and the adjustment quantity of the second module LCC resonant converter with the second modulation signal respectively to obtain a conduction angle modulation signal of the first module LCC resonant converter and a conduction angle modulation signal of the second module LCC resonant converter;
the control module is used for performing staggered control on the first modulation signal and the conduction angle modulation signal of the first module LCC resonant converter to obtain a third modulation signal of the first module LCC resonant converter and a fourth modulation signal of the second module LCC resonant converter; and inputting the third modulation signal, the fourth modulation signal, the conduction angle modulation signal of the second module LCC resonant converter and the first modulation signal into the driving circuit to obtain driving signals of all switching tubes, so as to control the switching tubes of the first module LCC resonant converter and the switching tubes of the second module LCC resonant converter.
7. The control device of a test apparatus based on an LCC resonant converter according to claim 6, wherein the control module controls a switching tube of the first module LCC resonant converter and a switching tube of the second module LCC resonant converter, specifically:
when the carrier signal is larger than or equal to the conduction angle modulation signal of the second module LCC resonant converter and smaller than the third modulation signal, the control module controls the leading bridge arm switching tube of the second module LCC resonant converter to turn over;
when the carrier signal is larger than or equal to the third modulation signal and smaller than the fourth modulation signal, the control module controls a lagging bridge arm switching tube of the first module LCC resonant converter to turn over;
when the carrier signal is larger than or equal to the fourth modulation signal and smaller than the first modulation signal, the control module controls the leading bridge arm switching tube of the first module LCC resonant converter to turn over;
when the carrier signal is greater than or equal to the first modulation signal, the control module controls the lagging bridge arm switching tube of the second module LCC resonant converter to turn over.
8. The control device of a test apparatus based on an LCC resonant converter according to claim 7, wherein said third modulation signal V t The method comprises the following steps:
fourth modulated signal V e3 The method comprises the following steps:
wherein V is m For the first modulated signal, the V e1 -modulating a signal for a conduction angle of the first module LCC resonant converter.
9. The control device of a test apparatus based on an LCC resonant converter according to claim 7, wherein the superposition module obtains an adjustment amount of the first module LCC resonant converter and an adjustment amount of the second module LCC resonant converter, specifically:
the superposition module calculates and obtains the error quantity of the first module LCC resonant converter according to the output voltage of the first module LCC resonant converter and the reference voltage of the first module LCC resonant converter; calculating to obtain the error amount of the second module LCC resonant converter according to the output voltage of the second module LCC resonant converter and the reference voltage of the second module LCC resonant converter;
and carrying out PI adjustment on the error amount of the first module LCC resonant converter and the error amount of the second module LCC resonant converter to obtain the adjustment amount of the first module LCC resonant converter and the adjustment amount of the second module LCC resonant converter respectively.
10. A control device for an LCC resonant converter based test apparatus according to any one of claims 6 to 9, wherein the reference voltage of the first module LCC resonant converter and the reference voltage of the second module LCC resonant converter are set in dependence on the output voltages of the two module LCC resonant converters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310773219.4A CN116780908A (en) | 2023-06-27 | 2023-06-27 | Control method and device of test equipment based on LCC resonant converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310773219.4A CN116780908A (en) | 2023-06-27 | 2023-06-27 | Control method and device of test equipment based on LCC resonant converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116780908A true CN116780908A (en) | 2023-09-19 |
Family
ID=87990990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310773219.4A Pending CN116780908A (en) | 2023-06-27 | 2023-06-27 | Control method and device of test equipment based on LCC resonant converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116780908A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116979813A (en) * | 2023-09-22 | 2023-10-31 | 武汉海德博创科技有限公司 | IPOS phase-shifting full-bridge circuit and switching converter |
-
2023
- 2023-06-27 CN CN202310773219.4A patent/CN116780908A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116979813A (en) * | 2023-09-22 | 2023-10-31 | 武汉海德博创科技有限公司 | IPOS phase-shifting full-bridge circuit and switching converter |
| CN116979813B (en) * | 2023-09-22 | 2023-12-12 | 武汉海德博创科技有限公司 | IPOS phase-shifting full-bridge circuit and switching converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10715056B2 (en) | Three-phase converter with zero-sequence regulation | |
| CN108832827B (en) | Discontinuous pulse width modulation method of three-level inverter with minimum switching loss | |
| CN110492774B (en) | High-power fractional order impedance element implementation circuit and control method thereof | |
| CN116780908A (en) | Control method and device of test equipment based on LCC resonant converter | |
| CN107994777A (en) | A kind of CLLLC types bidirectional DC-DC converter method for controlling frequency conversion | |
| CN106849624B (en) | Method and system for eliminating three-phase rectification harmonic waves based on repetitive control | |
| CN116686201A (en) | Discontinuous pulse width modulation method and three-phase inverter modulation circuit | |
| CN113691155B (en) | Single-phase inverter control method and system based on PI and repeated control and inverter | |
| CN113437895B (en) | Matrix vector angle proportional resonance control method | |
| CN110336472B (en) | H3IMC topological structure with unbalanced load and boost control method thereof | |
| CN108649779A (en) | A kind of control method inhibiting PWM current source type rectifier common-mode voltages | |
| CN115940599B (en) | Improved multi-sampling harmonic aliasing suppression method | |
| CN117134354A (en) | Repetitive PI control method and model of parallel active filter based on genetic algorithm | |
| CN108123477A (en) | A kind of quasi- PR photovoltaic combining inverters control method of neutral net | |
| CN113964837B (en) | Composite control method and system suitable for LCL type parallel active power filter | |
| CN206977316U (en) | A kind of control device of LCC resonance DC DC converters | |
| CN114512991B (en) | Active harmonic and reactive power generation system and method | |
| CN110442177A (en) | A kind of power control system | |
| CN112332689B (en) | Modulation method of neutral point clamped three-level converter based on geometric transformation | |
| CN213342016U (en) | Voltage-sharing control circuit | |
| CN111416514B (en) | Parallel current-sharing control method for three-phase voltage-reduction PFC circuit | |
| CN107359799A (en) | A kind of control method and its device of LCC resonance DC DC converters | |
| Zhao et al. | Direct charge control for mixed conduction mode grid-connected inverter | |
| CN115441766A (en) | Novel digital-analog hybrid control method for alternating current inverter | |
| CN117477976B (en) | Mixed MMC voltage stabilizing method with double level and circulation current inhibiting method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |