CN114928242A - Based on V 2 C CUK converter control method, circuit, device and medium - Google Patents

Based on V 2 C CUK converter control method, circuit, device and medium Download PDF

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Publication number
CN114928242A
CN114928242A CN202210598306.6A CN202210598306A CN114928242A CN 114928242 A CN114928242 A CN 114928242A CN 202210598306 A CN202210598306 A CN 202210598306A CN 114928242 A CN114928242 A CN 114928242A
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China
Prior art keywords
cuk converter
converter circuit
voltage
output
adder
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CN202210598306.6A
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Chinese (zh)
Inventor
屈莉莉
纪团龙
郑焕腾
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Foshan University
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Foshan University
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Priority to CN202210598306.6A priority Critical patent/CN114928242A/en
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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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/005—Conversion of dc power input into dc power output using Cuk converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • 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

Abstract

The invention discloses a method based on V 2 C CUK converter control method, circuit, device and medium, the method comprising: acquiring output voltage of a CUK converter circuit and output current of the CUK converter circuit; obtaining a first addition value according to the output voltage of the CUK converter circuit and the output current of the CUK converter circuit; obtaining an amplified voltage error value according to the output voltage of the CUK converter circuit and the expected voltage; obtaining a second addition value according to the first addition value and the amplified voltage error value; and obtaining a control signal for controlling the CUK converter circuit according to the second addition value. According to the invention, the inductive current control inner loop controlled by the peak current is changed into the inductive current and output voltage superposition control, so that the reaction speed can be greatly improved when load disturbance and inductive current mutation occur, and the anti-interference capability can be improved.

Description

Based on V 2 C CUK converter control method, circuit, device and medium
Technical Field
The invention relates to the technical field of power electronic device control, in particular to a V-based power electronic device 2 C CUK converter control method, circuit, device and medium.
Background
The control method adopted by the existing CUK converter is peak current control, and the control method has slow response speed when load disturbance occurs, so that the industrial requirement cannot be met. A control method adopted by the current CUK converter is V 2 Control, in essence, is an improvement over peak current control methods. The inductor current of the inner ring of the peak current control is replaced by the voltage drop of the series resistor of the output capacitor, although the transient performance is improved, the resistance value of the series resistor is too small, the slope value of the voltage drop signal of the inner ring is also smaller, the anti-interference capability of the inductor is reduced, in addition, a protection circuit during overcurrent needs to be added, and the complex circuit structure is realized.
Disclosure of Invention
The object of the invention is to provide a V-based alloy 2 The CUK converter control method, circuit, device and medium of C solve one or more technical problems in the prior art, and provide at least one useful choice or creation.
The embodiment of the invention provides a V-based method in a first aspect 2 C CUK converter control method, including:
acquiring output voltage of a CUK converter circuit and output current of the CUK converter circuit;
obtaining a first addition value according to the output voltage of the CUK converter circuit and the output current of the CUK converter circuit;
obtaining an amplified voltage error value according to the output voltage of the CUK converter circuit and the expected voltage;
obtaining a second addition value according to the first addition value and the amplified voltage error value;
and obtaining a control signal for controlling the CUK converter circuit according to the second addition value.
In an embodiment of the present invention, the obtaining a first addition value according to the CUK converter circuit output voltage and the CUK converter circuit output current includes:
inverting the output voltage of the CUK converter circuit to obtain an inverted output voltage of the CUK converter circuit;
and adding the output voltage of the inverted CUK converter circuit and the output current of the CUK converter circuit to obtain a first addition value.
In an embodiment of the present invention, the method further comprises: before obtaining a first addition value, carrying out voltage scaling processing on the output voltage of the CUK converter circuit with the reversed phase to obtain a scaled output voltage, and carrying out current scaling processing on the output current of the CUK converter circuit to obtain a scaled output current;
and adding the output voltage subjected to the proportional conversion and the output current subjected to the proportional conversion to obtain a first addition value.
In an embodiment of the present invention, obtaining an amplified voltage error value according to the output voltage of the CUK converter circuit and the desired voltage includes:
inverting the output voltage of the CUK converter circuit to obtain an inverted output voltage of the CUK converter circuit;
and adding and amplifying the output voltage of the inverted CUK converter circuit and the expected voltage to obtain an amplified voltage error numerical value.
In an embodiment of the present invention, the obtaining a second addition value according to the first addition value and the amplified voltage error value includes:
and adding the first addition value and the amplified voltage error value to obtain a second addition value.
In an embodiment of the present invention, the obtaining a control signal for controlling the CUK converter circuit according to the second addition value includes:
when the second addition value is larger than a high level threshold value, determining a control signal for controlling the CUK converter circuit to be 0, and reducing the output voltage of the CUK converter;
and when the second addition value is smaller than the low level threshold value, determining a control signal for controlling the CUK converter circuit to be 1, and increasing the output voltage of the CUK converter.
The embodiment of the second aspect of the invention provides a V-based 2 C CUK converter control circuit, including: the circuit comprises a switching tube, an RS trigger, a CUK converter circuit, a phase inverter, a first adder, a comparator and a third adder; the CUK converter control circuit is used for executing the second stepV-based according to any one of the aspects 2 C, a CUK converter control method;
the CUK converter circuit is connected to the inverter, the inverter is connected to the first adder, the CUK converter circuit outputs a voltage to the inverter, and the inverter outputs an inverted output voltage to the first adder;
the CUK converter circuit is further connected with the first adder, the CUK converter circuit outputs current to the first adder, and the first adder adds the value of the output current and the value of the output voltage to obtain a first added value;
the first adder is also connected with the comparator; the third adder is respectively connected with the controller, the inverter and the comparator, and adds the value of the expected voltage output by the controller and the value of the inverted output voltage output by the inverter to obtain an amplified voltage error value; the third adder outputting the amplified voltage error value to the comparator;
the comparator is also connected with the RS trigger; the comparator adds the first addition value and the amplified voltage error value to obtain a third addition value, and the third addition value is output to the RS trigger;
the RS trigger is also respectively connected with the switching tube and the external clock pulse, and when the external clock pulse outputs a high-level signal to the RS trigger, the RS trigger can output a trigger signal; when the trigger signal is 1, the switching tube is conducted, and the output voltage of the CUK converter circuit rises;
when the second addition value rises to be larger than or equal to the amplified voltage error value, the RS trigger receives a high level signal sent by the comparator, and when a trigger signal output by the RS trigger is 0, the switching tube is cut off, the output voltage of the CUK converter circuit drops, and the next high level signal is sent by the external clock pulse.
In an embodiment of the present invention, the CUK converter control circuit further includes: the current proportion link is respectively connected with the CUK converter circuit and the first adder, and carries out proportion conversion on the current output by the CUK converter circuit and outputs the result to the first adder;
the CUK converter control circuit further includes: a voltage proportion link connected to the inverter and the first adder, respectively, the current proportion link performing a proportional conversion on an inverted voltage output from the inverter and outputting a result to the first adder;
the CUK converter circuit includes: the circuit comprises a voltage source, a first inductor, a first capacitor, a second inductor, a second capacitor, a diode and a CUK converter;
the positive electrode of the voltage source is connected with one end of the first inductor, and the other end of the first inductor is connected with one end of the first capacitor; the other end of the first capacitor is connected with one end of a second inductor, the other end of the second inductor is respectively connected with one end of the second capacitor and one end of the CUK converter, and the other end of the second capacitor, the other end of the CUK converter and the negative electrode of the voltage source are all grounded;
the anode of the diode is respectively connected with the other end of the first capacitor and one end of the second inductor, and the cathode of the diode is grounded;
the voltage of the CUK converter is the output voltage of the CUK converter circuit, and the current flowing through the second inductor is the output current of the CUK converter circuit;
the CUK converter circuit further comprises a second capacitance resistor, one end of the second capacitance resistor is connected with the other end of the second capacitor, and the other end of the second capacitance resistor is grounded;
the drain electrode of the switch tube is connected with the other end of the first inductor, the source electrode of the switch tube is grounded, and the grid electrode of the switch tube is connected with the Q output end of the RS trigger;
the input end of the current proportion link is connected with the other end of the second inductor, and the output end of the current proportion link is connected with one input end of the first adder; the input end of the phase inverter is connected with one end of the CUK converter, the output end of the phase inverter is connected with the input end of the voltage proportion link, the output end of the voltage proportion link is connected with the other input end of the first adder, and the output end of the first adder is connected with one input end of the comparator;
the output end of the phase inverter is also connected with one input end of the third adder, and the controller is connected with the other input end of the third adder; the output end of the third adder is connected with the R input end of the RS trigger, and the external clock pulse is connected with the S input end of the RS trigger.
An embodiment of a third aspect of the present invention provides an electronic device, including:
a memory for storing a program;
a processor for executing the memory-stored program, the processor being adapted to perform the method of any of the first aspects when the processor executes the memory-stored program.
A fourth aspect of the present invention is a storage medium storing computer-executable instructions for performing the method of any one of the first aspect.
The beneficial effects of the invention are: obtaining a control signal by obtaining current and voltage output by a CUK converter circuit and then utilizing the output current and voltage; on the basis of the traditional peak current control CUK converter circuit, an inductive current control inner ring controlled by the peak current is changed into inductive current and output voltage superposition control, so that when load disturbance and sudden change of inductive current occur, the reaction speed can be greatly improved, and the anti-interference capability can be improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
FIG. 1 shows a V-based representation according to an embodiment of the present invention 2 A frame diagram of a CUK converter control circuit of C;
FIG. 2 is a V-based representation of an embodiment of the present invention 2 C, a circuit diagram of a CUK converter control circuit;
FIG. 3 is a block diagram of an electronic device according to an embodiment of the invention;
FIG. 4 shows a load loading operation based on V according to an embodiment of the present invention 2 Transient response waveform of control circuit of CUK converter of C
FIG. 5 shows a load shedding V-based algorithm according to an embodiment of the present invention 2 C transient response waveform of the CUK converter control circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not to be construed as limiting the invention.
It should be noted that although the functional modules are divided in the schematic diagram, in some cases, the functional modules may be divided differently from the modules in the system.
In the description of the present invention, unless otherwise explicitly defined, terms such as arrangement, installation, connection and the like should be broadly construed, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the detailed contents of the technical solutions. If any description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of the technical features indicated or to implicitly indicate the precedence of the technical features indicated.
In some embodiments of the invention, a V-based 2 C CUK converter control method, including:
acquiring output voltage of a CUK converter circuit and output current of the CUK converter circuit;
obtaining a first addition value according to the output voltage of the CUK converter circuit and the output current of the CUK converter circuit;
obtaining an amplified voltage error value according to the output voltage of the CUK converter circuit and the expected voltage;
obtaining a second addition value according to the first addition value and the amplified voltage error value;
and obtaining a control signal for controlling the CUK converter circuit according to the second addition value.
In the embodiment, the current and the voltage output by the CUK converter circuit are obtained, and then the output current and the output voltage are utilized to obtain the control signal; on the basis of the traditional peak current control CUK converter circuit, an inductive current control inner ring controlled by the peak current is changed into inductive current and output voltage superposition control, so that when load disturbance and sudden change of inductive current occur, the reaction speed can be greatly improved, and the anti-interference capability can be improved.
In addition, the V-based 2 The control method includes the steps that V in C control refers to voltage, C refers to current, and the output voltage of the CUK converter circuit and the output current of the CUK converter circuit are superposed, and then the obtained result is superposed with a voltage error, so that the control method is based on V 2 C, controlling; the existing control methods of the CUK converter include 2 methods: 1. peak current control for controlling the CUK converter only by the output current of the CUK converter circuit; 2. v 2 Control by means of the output voltage of the CUK converter circuit only (at V) 2 The voltage on the series resistor of the output capacitor is specified in the control circuit) to control the CUK converter.
In some embodiments of the present invention, deriving the first additive value based on the CUK converter circuit output voltage and the CUK converter circuit output current comprises:
inverting the output voltage of the CUK converter circuit to obtain the inverted output voltage of the CUK converter circuit;
and adding the output voltage of the CUK converter circuit and the output current of the CUK converter circuit in an inverted state to obtain a first addition value. Superposing the output voltage of the CUK converter circuit and the output current of the CUK converter circuit to carry out superposition control on the CUK converter circuit;
it should be noted that, the inverted output voltage of the CUK converter circuit and the output current of the CUK converter circuit are added, and actually, the output voltage of the CUK converter circuit and the output current of the CUK converter circuit are subtracted; in the addition process, the value of the output voltage of the CUK converter circuit and the value of the output current of the CUK converter circuit are actually added.
In some embodiments of the present invention, before obtaining the first addition value, performing voltage scaling on the inverted output voltage of the CUK converter circuit to obtain a scaled output voltage, and performing current scaling on the output current of the CUK converter circuit to obtain a scaled output current;
and adding the output voltage subjected to the proportion conversion and the output current subjected to the proportion conversion to obtain a first addition value.
Because the difference between the output voltage of the CUK converter circuit and the output current of the CUK converter circuit is larger in actual numerical value, proportional conversion is needed before superposition control is carried out, and a control signal is obtained more accurately, so that the CUK converter circuit is better controlled.
In some embodiments of the present invention, deriving the amplified voltage error value based on the CUK converter circuit output voltage and the desired voltage comprises:
inverting the output voltage of the CUK converter circuit to obtain the inverted output voltage of the CUK converter circuit;
and adding and amplifying the output voltage of the inverted CUK converter circuit and the expected voltage to obtain an amplified voltage error numerical value.
Note that the inverted CUK converter circuit output voltage and the desired voltage are added, and the CUK converter circuit output voltage and the desired voltage are actually subtracted from each other.
In some embodiments of the invention, the method further comprises: obtaining a second addition value based on the first addition value and the amplified voltage error value comprises:
and adding the first addition value and the amplified voltage error value to obtain a second addition value.
In some embodiments of the invention, deriving the control signal for controlling the CUK converter circuit based on the second added value comprises:
when the second addition value is larger than the high level threshold, determining a control signal for controlling the CUK converter circuit as 0, and reducing the output voltage of the CUK converter;
when the second addition value is smaller than the low level threshold, the control signal for controlling the CUK converter circuit is determined to be 1, and the output voltage of the CUK converter is increased.
Those skilled in the art can determine the high level threshold and the low level threshold according to the actual conditions; in one embodiment, the high level threshold is taken as 3.5, and the low level threshold is taken as 0.5; it is easily understood that the control signal remains unchanged when the second addition value is equal to or greater than the low level threshold value and equal to or less than the high level threshold value.
Referring to fig. 1 and 2, in some embodiments of the invention, a V-based 2 C CUK converter control circuit, including: a switch tube S, RS trigger RS, a CUK converter circuit 109, an inverter D1, a first adder Add1, a comparator CMP and a third adder Add 3; CUK converter control circuit for V-based converter control circuit 2 A CUK converter control method of C;
the CUK converter circuit 109 is connected to the inverter D1, the inverter D1 is connected to the first adder Add1, the CUK converter circuit 109 outputs a voltage to the inverter D1, and the inverter D1 outputs an inverted output voltage to the first adder Add 1;
the CUK converter circuit 109 is further connected to a first adder Add1, the CUK converter circuit 109 outputs a current to a first adder Add1, and the first adder Add1 adds the value of the output current and the value of the output voltage to obtain a first added value;
the first adder Add1 is also connected to the comparator CMP; the third adder Add3 is connected to the controller 110, the inverter D1, and the comparator CMP, respectively, and the third adder Add3 adds the value of the desired voltage output by the controller 110 and the value of the inverted output voltage output by the inverter D1 to obtain an amplified voltage error value; the third adder Add3 outputs the amplified voltage error value to the comparator CMP;
the comparator CMP is also connected with an RS trigger RS; the comparator CMP adds the first addition value and the amplified voltage error value to obtain a third phase addition value, and outputs the third phase addition value to the RS trigger RS;
the RS trigger RS is also respectively connected with the switching tube S and the external clock pulse CLK, and when the external clock pulse CLK outputs a high-level signal to the RS trigger RS, the RS trigger RS can output a trigger signal; when the trigger signal is 1, the switching tube S is turned on, and the output voltage of the CUK converter circuit 109 rises;
when the second addition value rises to be larger than or equal to the amplified voltage error value, the RS flip-flop RS receives the high level signal sent by the comparator CMP, and when the flip-flop signal (i.e., the control signal in the above method) output by the RS flip-flop RS is 0, the switching tube S is cut off, the output voltage of the CUK converter circuit 109 drops, and the next high level signal is sent out until the external clock pulse CLK is maintained.
In the embodiment, the inverted output voltage of the CUK converter circuit 109 and the expected voltage output by the controller 110 are compared by the comparator CMP, and since the output voltage of the CUK converter circuit 109 passes through the inverter D1, the actual comparator CMP calculates the difference between the output voltage of the CUK converter circuit 109 and the expected voltage output by the controller 110, and then outputs high and low levels through the RS flip-flop to control the gate of the switching tube S, and the switching tube S controls whether the CUK converter circuit 109 is on or off; by acquiring the current and the voltage of the CUK converter circuit 109, the CUK converter is controlled in real time by the adder and the switching tube, the anti-interference capability is improved, and the circuit structure is simple.
Referring to fig. 1 and 2, in some embodiments of the invention, the CUK converter control circuit further comprises: the current proportion link wc is connected to the CUK converter circuit 109 and the first adder Add1, and the current proportion link wc performs proportion conversion on the current output by the CUK converter circuit 109 and outputs the result to the first adder Add 1.
Referring to fig. 1 and 2, in some embodiments of the invention, the CUK converter control circuit further comprises: the voltage proportion link wv and the voltage proportion link wv are respectively connected with the inverter D1 and the first adder Add1, and the current proportion link wc performs proportion transformation on the inverted voltage output by the inverter D1 and outputs the result to the first adder Add 1.
Referring to fig. 1 and 2, in some embodiments of the invention, CUK converter circuit 109 includes: a voltage source Vg, a first inductor L1, a first capacitor C1, a second inductor L2, a second capacitor C2, a diode D, and a CUK converter Ro;
the positive electrode of a voltage source Vg is connected with one end of a first inductor L1, and the other end of the first inductor L1 is connected with one end of a first capacitor C1; the other end of the first capacitor C1 is connected to one end of a second inductor L2, the other end of the second inductor L2 is connected to one end of the second capacitor C2 and one end of the CUK converter Ro, and the other end of the second capacitor C2, the other end of the CUK converter Ro and the negative electrode of the voltage source Vg are all grounded;
the anode of the diode D is connected to the other end of the first capacitor C1 and one end of the second inductor L2, respectively, and the cathode of the diode D is grounded;
the voltage of the CUK converter Ro is the output voltage of the CUK converter circuit 109, and the circuit flowing through the second inductor L2 is the output current of the CUK converter circuit 109.
Referring to fig. 2, in some embodiments of the present invention, the CUK converter circuit 109 further includes a second capacitive resistor Rc2, one end of the second capacitive resistor Rc2 is connected to the other end of the second capacitor C2, and the other end of the second capacitive resistor Rc2 is grounded.
The second capacitance resistor Rc2 functions as a voltage divider.
Referring to fig. 2, in some embodiments of the present invention, the drain of the switching tube S is connected to the other end of the first inductor L1, the source thereof is grounded, and the gate thereof is connected to the Q output terminal of the RS flip-flop RS;
the input end of the current proportion link wc is connected with the other end of the second inductor L2, and the output end of the current proportion link wc is connected with one input end of the first adder Add 1; the input end of the inverter D1 is connected with one end of the CUK converter Ro, the output end of the inverter D1 is connected with the input end of the voltage proportion link wv, the output end of the voltage proportion link wv is connected with the other input end of the first adder Add1, and the output end of the first adder Add1 is connected with one input end of the comparator CMP;
the output end of the inverter D1 is further connected to an input end of the third adder Add3, and the controller 110 is connected to another input end of the third adder Add 3; the output end of the third adder Add3 is connected to the R input end of the RS flip-flop RS, and the external clock pulse is connected to the S input end of the RS flip-flop RS.
It should be noted that the voltage error value Ve is generated by performing operation and amplification on the output voltage Vo of the CUK converter circuit 109 and the expected voltage Vref given by the controller 110 through the switching tube S, the first added value Vs is a superimposed signal generated by superimposing the output voltage Vo of the CUK converter circuit 109 through the current proportion link wc by the current iL2 of the second inductor L2, and the trigger signal Vp is a control signal of the switching tube S. When the external clock pulse CLK inputs a high level to the RS flip-flop RS, the Q terminal of the RS flip-flop RS outputs 1 to the switching tube S to turn on the switching tube S. At this time, the output voltage Vo of the CUK converter circuit 109, the inductor current iL1 of the first inductor L1, the current iL2 of the second inductor L2, and the first addition value Vs all rise. When the first addition value Vs rises to be greater than or equal to the voltage error value Ve, the trigger R end receives a third addition value Vr sent by the comparator CMP, the third addition value Vr is a high-level signal, the trigger Q end outputs zero to the switching tube, the trigger signal Vp is zero, the switching tube S is cut off, and the diode D is turned on when receiving a forward conduction signal. At this time, the CUK converter circuit 109 outputs the voltage Vo, and the first inductor L1 inductor current iL1, the second inductor L2 current iL2 and the first added value Vs all fall, and the signals are maintained until the external clock pulse CLK sends out a next high level signal.
It should be noted that, when the trigger signal Vp is zero, the switching tube S is turned off, and the diode D is turned on by receiving the forward-going signal, so that two basic loops are formed in the CUK converter circuit 109: a voltage source Vg, a first inductor L1, a first capacitor C1 and a diode D; the diode D, the second inductor L2, and the CUK converter Ro (including a loop connected in parallel to the loop), and the second inductor L2 outputs the CUK converter Ro output voltage, so the CUK converter circuit 109 outputs the voltage Vo, and the first inductor L1 inductor current iL1, the second inductor L2 current iL2, and the first added value Vs all drop;
when the trigger signal Vp is 1, the switching tube S is turned on, and two basic loops are formed in the CUK converter circuit 109: a voltage source Vg, a first inductor L1 and a switch tube S; the switching tube S, the first capacitor C1, the second inductor L2, and the CUK converter Ro (including a loop connected in parallel to the loop), and the voltage of the first capacitor C1 supplies the output voltage of the CUK converter Ro and the second inductor L2, so that the output voltage Vo of the CUK converter circuit 109, the inductor current iL1 of the first inductor L1, the inductor current iL2 of the second inductor L2, and the first addition value Vs all decrease.
In the course of the experiment, as shown in the CUK converter circuit 109 in fig. 2, V of zhou hua was used 2 The main circuit parameters in the CUK converter modeling and transient performance analysis are controlled to carry out simulation experiments, namely the Vg input voltage is 15V, the output voltage Vo is 10V, and the inductance L 1 ,L 2 100 muH, capacitance C 1 ,C 2 470 muF, equivalent series resistance R C2 200m omega, load R o 10 omega and the switching period T is 20 mus, and the load disturbance experiment is carried out on the switching period T, and the experimental results of the invention are respectively taken to be matched with the V of Zhou Hua 2 Control of peak current control, V, in the context of CUK converter modeling and transient performance analysis 2 And (5) comparing experimental results of controlling the CUK converter.
As shown in FIG. 4, the invention was based on V at 0.1 second 2 And C, performing a load loading experiment on the CUK converter controlled by C, namely outputting a transient response waveform of the voltage when the load resistance becomes half of the original voltage. It can be seen that the overshoot of the converter occurs at 97mv and it re-enters steady state over a response time of 0.24 ms.
And document V 2 Control CUK converter modeling and transient performance analysis (Zhou Hua) in the text V 2 The overshoot and the response time of the CUK converter are controlled to be 142.8mv and 0.28ms respectively when the load is loaded, and the overshoot and the response of the CUK converter are controlled by the peak current when the load is loadedThe time should be 335.6mv and 3.74ms, respectively.
As shown in FIG. 5, the invention was based on V at 0.1 second 2 And C, performing a load shedding experiment on the CUK converter controlled by C, namely outputting a transient response waveform of the voltage when the load resistance is increased to be twice of the original load resistance. It can be seen that the converter exhibits an overshoot of 20mv and it re-enters steady state over a response time of 0.2 ms.
And document V 2 Control CUK converter modeling and transient performance analysis (Zhou Hua) in the text V 2 The overshoot and the response time of the CUK converter under load loading are respectively controlled to be 27.8mv and 0.29ms, and the overshoot and the response time of the peak current control CUK converter under load loading are respectively 337.1mv and 3.58 ms.
From the above analysis, it can be seen that the present invention is based on V whether the load is loaded or unloaded 2 The anti-interference capability and the response speed of the C-controlled CUK converter are superior to those of the traditional peak-value-controlled CUK converter.
In addition, referring to fig. 3, an embodiment of the present application also provides an electronic device, including: memory 11, processor 12 and a computer program stored on memory 11 and executable on processor 12.
The processor 12 and the memory 11 may be connected by a bus or other means.
V-based implementation of the above embodiments 2 The non-transitory software program and instructions required for the CUK converter control method of C are stored in the memory 11, and when executed by the processor 12, perform V-based control in the above-described embodiment 2 C, control method of CUK converter.
The embodiment of the invention also provides a storage medium which stores computer-executable instructions for executing the V-based data 2 C, control method of CUK converter.
In one embodiment, the storage medium stores computer-executable instructions that are executed by one or more control processors.
The above described embodiments are merely illustrative, wherein elements illustrated as separate components may or may not be physically separate, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as is well known to those skilled in the art.
Embodiments of this invention are described herein, including the preferred embodiments known to the inventors for carrying out the invention. Variations of those described embodiments may become apparent to those of ordinary skill in the art upon reading the foregoing description. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the embodiments of the invention to be practiced otherwise than as specifically described herein. Accordingly, the scope of the present invention includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the scope of the invention unless otherwise indicated herein or otherwise clearly contradicted by context.

Claims (10)

1. Based on V 2 The CUK converter control method of C is characterized by comprising the following steps:
acquiring output voltage of a CUK converter circuit and output current of the CUK converter circuit;
obtaining a first addition value according to the output voltage of the CUK converter circuit and the output current of the CUK converter circuit;
obtaining an amplified voltage error value according to the output voltage of the CUK converter circuit and the expected voltage;
obtaining a second addition value according to the first addition value and the amplified voltage error value;
and obtaining a control signal for controlling the CUK converter circuit according to the second addition value.
2. The V-based according to claim 1 2 The CUK converter control method of C, wherein obtaining a first added value based on the CUK converter circuit output voltage and the CUK converter circuit output current comprises:
inverting the output voltage of the CUK converter circuit to obtain an inverted output voltage of the CUK converter circuit;
and adding the output voltage of the inverted CUK converter circuit and the output current of the CUK converter circuit to obtain a first addition value.
3. V-based according to claim 2 2 C, the method further comprising: for said inversion before obtaining the first addition valueThe output voltage of the CUK converter circuit is subjected to voltage proportion conversion processing to obtain the output voltage of proportion conversion, and the output current of the CUK converter circuit is subjected to current proportion conversion processing to obtain the output current of proportion conversion;
and adding the output voltage subjected to the proportional conversion and the output current subjected to the proportional conversion to obtain a first addition value.
4. The V-based according to claim 1 2 The CUK converter control method of C, wherein obtaining an amplified voltage error value based on the CUK converter circuit output voltage and the desired voltage comprises:
inverting the output voltage of the CUK converter circuit to obtain the inverted output voltage of the CUK converter circuit;
and adding and amplifying the output voltage of the inverted CUK converter circuit and the expected voltage to obtain an amplified voltage error numerical value.
5. V-based according to claim 1 2 C, wherein said obtaining a second added value based on said first added value and said amplified voltage error value comprises:
and adding the first addition value and the amplified voltage error value to obtain a second addition value.
6. The V-based according to claim 1 2 The CUK converter control method of C, wherein obtaining a control signal for controlling the CUK converter circuit based on the second addition value comprises:
when the second addition value is larger than a high level threshold value, determining a control signal for controlling the CUK converter circuit to be 0, and reducing the output voltage of the CUK converter;
and when the second addition value is smaller than the low level threshold value, determining a control signal for controlling the CUK converter circuit to be 1, and increasing the output voltage of the CUK converter.
7. Based on V 2 The CUK converter control circuit of C, characterized by comprising: the circuit comprises a switching tube, an RS trigger, a CUK converter circuit, a phase inverter, a first adder, a comparator and a third adder; the CUK converter control circuit is used for executing the V-based converter of any one of claims 1 to 6 2 C, a CUK converter control method;
the CUK converter circuit is connected to the inverter, the inverter is connected to the first adder, the CUK converter circuit outputs a voltage to the inverter, and the inverter outputs an inverted output voltage to the first adder;
the CUK converter circuit is further connected with the first adder, the CUK converter circuit outputs current to the first adder, and the first adder adds the value of the output current and the value of the output voltage to obtain a first added value;
the first adder is also connected with the comparator; the third adder is respectively connected with the controller, the inverter and the comparator, and adds the value of the expected voltage output by the controller and the value of the inverted output voltage output by the inverter to obtain an amplified voltage error value; the third adder outputting the amplified voltage error value to the comparator;
the comparator is also connected with the RS trigger; the comparator adds the first addition value and the amplified voltage error value to obtain a third phase addition value, and the third phase addition value is output to the RS trigger;
the RS trigger is also respectively connected with the switch tube and the external clock pulse, and when the external clock pulse outputs a high-level signal to the RS trigger, the RS trigger can output a trigger signal; when the trigger signal is 1, the switching tube is conducted, and the output voltage of the CUK converter circuit rises;
when the second addition value rises to be larger than or equal to the amplified voltage error value, the RS trigger receives a high level signal sent by the comparator, and when a trigger signal output by the RS trigger is 0, the switching tube is cut off, the output voltage of the CUK converter circuit drops, and the next high level signal is sent by the external clock pulse.
8. V-based according to claim 7 2 C, the CUK converter control circuit further comprising: the current proportion link is respectively connected with the CUK converter circuit and the first adder, and carries out proportion conversion on the current output by the CUK converter circuit and outputs the result to the first adder;
the CUK converter control circuit further includes: the voltage proportion link is respectively connected with the phase inverter and the first adder, and the current proportion link carries out proportion transformation on the inverted voltage output by the phase inverter and outputs the result to the first adder;
the CUK converter circuit includes: the circuit comprises a voltage source, a first inductor, a first capacitor, a second inductor, a second capacitor, a diode and a CUK converter;
the positive electrode of the voltage source is connected with one end of the first inductor, and the other end of the first inductor is connected with one end of the first capacitor; the other end of the first capacitor is connected with one end of a second inductor, the other end of the second inductor is respectively connected with one end of the second capacitor and one end of the CUK converter, and the other end of the second capacitor, the other end of the CUK converter and the negative electrode of the voltage source are all grounded;
the anode of the diode is respectively connected with the other end of the first capacitor and one end of the second inductor, and the cathode of the diode is grounded;
the voltage of the CUK converter is the output voltage of the CUK converter circuit, and the current flowing through the second inductor is the output current of the CUK converter circuit;
the CUK converter circuit further comprises a second capacitor resistor, one end of the second capacitor resistor is connected with the other end of the second capacitor, and the other end of the second capacitor resistor is grounded;
the drain electrode of the switch tube is connected with the other end of the first inductor, the source electrode of the switch tube is grounded, and the grid electrode of the switch tube is connected with the Q output end of the RS trigger;
the input end of the current proportion link is connected with the other end of the second inductor, and the output end of the current proportion link is connected with one input end of the first adder; the input end of the phase inverter is connected with one end of the CUK converter, the output end of the phase inverter is connected with the input end of the voltage proportion link, the output end of the voltage proportion link is connected with the other input end of the first adder, and the output end of the first adder is connected with one input end of the comparator;
the output end of the phase inverter is also connected with one input end of the third adder, and the controller is connected with the other input end of the third adder; the output end of the third adder is connected with the R input end of the RS trigger, and the external clock pulse is connected with the S input end of the RS trigger.
9. An electronic device, comprising:
a memory for storing a program;
a processor for executing the memory-stored program, the processor being adapted to perform the method of any of claims 1 to 6 when the processor executes the memory-stored program.
10. A storage medium having stored thereon computer-executable instructions for performing the method of any one of claims 1 to 6.
CN202210598306.6A 2022-05-30 2022-05-30 Based on V 2 C CUK converter control method, circuit, device and medium Pending CN114928242A (en)

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CN202210598306.6A CN114928242A (en) 2022-05-30 2022-05-30 Based on V 2 C CUK converter control method, circuit, device and medium

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CN202210598306.6A CN114928242A (en) 2022-05-30 2022-05-30 Based on V 2 C CUK converter control method, circuit, device and medium

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CN114928242A true CN114928242A (en) 2022-08-19

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