CN115514232A - Power supply system, control method thereof and electronic equipment - Google Patents

Power supply system, control method thereof and electronic equipment Download PDF

Info

Publication number
CN115514232A
CN115514232A CN202211302298.2A CN202211302298A CN115514232A CN 115514232 A CN115514232 A CN 115514232A CN 202211302298 A CN202211302298 A CN 202211302298A CN 115514232 A CN115514232 A CN 115514232A
Authority
CN
China
Prior art keywords
switching tube
voltage
dead time
tube
inductor
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
Application number
CN202211302298.2A
Other languages
Chinese (zh)
Inventor
方洁
田晨
郭红光
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN202211302298.2A priority Critical patent/CN115514232A/en
Publication of CN115514232A publication Critical patent/CN115514232A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1582—Buck-boost 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
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H02M1/0054—Transistor switching losses
    • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/38—Means for preventing simultaneous conduction of switches
    • H02M1/385—Means for preventing simultaneous conduction of switches with means for correcting output voltage deviations introduced by the dead time
    • 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 application discloses a power supply system, a control method thereof and an electronic device, wherein the power supply system comprises: a voltage conversion circuit; a detection circuit for detecting an input voltage and/or an output voltage of the voltage conversion circuit; and the control circuit is connected with the detection circuit and is used for controlling the dead time of a switching tube in the voltage conversion circuit according to the input voltage and/or the output voltage. Compared with the traditional scheme that the dead time of the switching tube is fixed, the scheme can adaptively adjust the dead time of part or all of the switching tubes in the voltage conversion circuit according to different input voltages and/or output voltages, and therefore the working efficiency of a power supply system is improved.

Description

Power supply system, control method thereof and electronic equipment
Technical Field
The embodiment of the application relates to the technical field of power supply control, and more particularly to a power supply system, a control method thereof and an electronic device.
Background
At present, a voltage conversion circuit (such as a four-tube Buck-Boost circuit) is widely applied to the fields of energy storage systems, photovoltaic optimizers and the like. When the conventional pulse width modulation is adopted, a large switching loss exists on a switching tube of the voltage conversion circuit, and the power conversion efficiency of the voltage conversion circuit is seriously influenced when the switching frequency is increased.
The soft switching technology is an effective way to reduce high switching loss at high frequency, i.e. Zero Voltage Switching (ZVS) can be realized by using resonance between a power inductor and a parasitic capacitor of a switching tube in dead time, and switching loss is obviously reduced.
For convenience of control, the dead time and the zero-voltage switching current of the switching tube in the voltage conversion circuit are usually designed to be fixed values, but the fixed dead time and the zero-voltage switching current may introduce additional on-state loss of the body diode or make it difficult to completely realize soft switching of the switching tube, resulting in low operating efficiency of the power supply system.
Disclosure of Invention
The embodiment of the application provides a power supply system, a control method thereof and electronic equipment. Various aspects of embodiments of the present application are described below.
In a first aspect, a power supply system is provided, including: a voltage conversion circuit; a detection circuit for detecting an input voltage and/or an output voltage of the voltage conversion circuit; and the control circuit is connected with the detection circuit and is used for controlling the dead time of a switching tube in the voltage conversion circuit according to the input voltage and/or the output voltage.
In a second aspect, a method for controlling a power supply system including a voltage conversion circuit is provided, the method including: detecting an input voltage and/or an output voltage of the voltage conversion circuit; and controlling the dead time of a switching tube in the voltage conversion circuit according to the input voltage and/or the output voltage.
In a third aspect, an electronic device is provided, which includes the power supply system according to the first aspect.
In a fourth aspect, there is provided a computer readable storage medium having stored thereon executable code that, when executed, is capable of implementing the method of the second aspect.
In a fifth aspect, there is provided a computer program product comprising executable code that, when executed, is capable of implementing the method of the second aspect.
The embodiment of the application provides a power supply system, which comprises a voltage conversion circuit, a detection circuit and a control circuit, wherein the detection circuit can be used for detecting the input voltage and/or the output voltage of the voltage conversion circuit, and then the control circuit is used for controlling the dead time of a switching tube in the voltage conversion circuit according to the input voltage and/or the output voltage. Compared with the traditional scheme that the dead time of all the switching tubes of the voltage conversion circuit is fixed, the scheme can adaptively adjust the dead time of part or all the switching tubes in the voltage conversion circuit according to different input voltages and/or output voltages, and therefore the working efficiency of a power supply system is improved.
Drawings
Fig. 1 is a schematic structural diagram of a four-tube Buck-Boost circuit according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a power supply system according to an embodiment of the present application.
Fig. 3 is a schematic diagram of a variation waveform of the inductor current of the first inductor shown in fig. 2 in different operation modes.
Fig. 4 is a waveform diagram illustrating the first inductor shown in fig. 3 when the inductor current is reduced to a critical value.
Fig. 5 is a flowchart illustrating a control method of a power supply system according to an embodiment of the present application.
Fig. 6 is a schematic structural diagram of a control device of a power supply system according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments.
It should be noted that, in the embodiments of the present application, the descriptions of "first", "second", "third", "fourth", etc. are referred to, and the descriptions of "first", "second", "third", "fourth", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
With the continuous development of power electronic technology, voltage conversion circuits are widely used in various situations. For the occasions that the input voltage variation range is wide and the output voltage is between the input voltage range, such as an intermediate bus converter in a distributed power system, an anode power supply in a power processing unit in an electric propulsion system of a spacecraft, and a two-stage active power factor corrector, a voltage conversion circuit with a voltage boosting and reducing characteristic is generally required to be adopted. The voltage conversion circuit may include a four-tube Buck-Boost circuit, a Cuk circuit, a Zeta circuit, a SEPIC circuit, and the like.
When the conventional pulse width modulation is adopted, a large switching loss exists on a switching tube of the voltage conversion circuit, and the power conversion efficiency of the voltage conversion circuit is seriously influenced when the switching frequency is increased.
The soft switching technology is an effective way to reduce high switching loss at high frequency, that is, resonance between a power inductor and a parasitic capacitor of a switching tube in dead time can be used to realize Zero Voltage Switching (ZVS), and switching loss is significantly reduced. The four-transistor Buck-Boost circuit will be described as an example.
Fig. 1 is a four-tube Buck-Boost circuit according to an embodiment of the present invention, and as shown in fig. 1, the four-tube Buck-Boost circuit 100 is provided due to the junction capacitance C 1 ～C 4 Switching tube Q 1 ～Q 4 Zero voltage turn-off can naturally be achieved. The main reasons are as follows: when the switch tube Q 1 ～Q 4 When the power is turned off, the inductive current will be supplied to the pairCorresponding junction capacitance C 1 ～C 4 Charging, thus limiting the switch tube Q 1 ～Q 4 Voltage rise rate of, approximately realizing Q 1 ～Q 4 The zero voltage of (c) is off.
It can be understood that if the switch tube Q is to be realized 1 ～Q 4 When the zero voltage is switched on, the junction capacitor can be discharged to zero through the inductive current, and the switching tube can realize the zero voltage switching on. With continued reference to FIG. 1, it can be seen that Q 1 And Q 4 For the main control tube, if desired, the inductance L is reduced c So that the current ripple increases, the inductor L c Of the inductor current i Lc Will flow through Q in reverse direction 2 Or Q 3 . Then, when Q is 2 Or Q 3 When turned off, i Lc To Q 1 Or Q 4 The discharge direction of the junction capacitor is from B to A, and then the discharge direction is the switch tube Q 1 Or Q 4 Creating conditions for realizing ZVS. Similarly, for the switch tube Q 2 Or Q 3 Inductor current i to achieve ZVS Lc Then it is necessary to satisfy that the inductor current flows from a to B.
Exemplarily, for the switching tube Q 1 And Q 2 The case (1). At Q 1 Before turn-off, inductor current i Lc Need to be greater than zero (i.e. inductor current i) Lc From a to B). Thus, Q 1 When turned off, i Lc Junction-giving capacitance C 1 Charging while giving junction capacitance C 2 And (4) discharging. As junction capacitance C 1 Is raised to V in ，C 2 After the voltage of (2) drops to zero, Q 2 Zero voltage turn-on can be achieved.
At turn-off of Q 2 Before, the inductor current i Lc Need to be less than zero (i.e. inductor current i) Lc From B to a). Thus, Q 2 When turned off, i Lc Junction-giving capacitance C 2 Charging while giving junction capacitance C 1 And (4) discharging. When giving junction capacitance C 2 Is raised to V in Node capacitance C 1 After the voltage of (2) drops to zero, Q 1 Zero voltage turn-on can be achieved.
From the above analysis, it can be seen that, in order to do soOn-off tube Q 1 And Q 2 ZVS of (2), the following conditions need to be satisfied: 1) At Q 1 Before turn-off, inductor current i Lc Need to be greater than zero; 2) At Q 2 Before turn-off, inductor current i Lc It needs to be less than zero.
Similarly, for the switch tube Q 3 And Q 4 In order to realize ZVS, the following conditions should be satisfied: 1) At Q 3 Before turn-off, inductor current i Lc Needs to be less than zero; 2) At Q 4 Before turn-off, inductor current i Lc It needs to be greater than zero.
For the convenience of control, the dead time and the zero-voltage switching current of the switching tube in the four-tube Buck-Boost circuit 100 are usually designed to be fixed values, but the fixed dead time and the zero-voltage switching current may introduce additional parasitic diode (also referred to as body diode) on-state loss or make it difficult to completely realize soft switching of the switching tube, resulting in low operating efficiency of the power supply system.
In order to solve the above problem, an embodiment of the present application provides a power supply system, which includes a voltage converting circuit, a detecting circuit, and a control circuit, and the detecting circuit may be used to detect an input voltage and/or an output voltage of the voltage converting circuit, and then the control circuit may be used to control a dead time of a switching tube in the voltage converting circuit according to the input voltage and/or the output voltage. Compared with the scheme that the dead time of all switching tubes of the traditional voltage conversion circuit is fixed, the scheme can adaptively adjust the dead time of part or all switching tubes in the voltage conversion circuit according to different input voltages and/or output voltages, and therefore the working efficiency of a power supply system is improved.
Fig. 2 is a schematic structural diagram of a power supply system according to an embodiment of the present application. As shown in fig. 2, the power supply system 200 includes a voltage conversion circuit 210, a detection circuit 220, and a control circuit 230.
The voltage conversion circuit 210 may be a voltage conversion circuit having a buck-boost characteristic. A power input of the voltage converting circuit 210 may be configured to receive an input voltage, and a voltage output of the voltage converting circuit 210 may be configured to provide an output voltage to a load. The voltage conversion circuit 210 can be applied to the fields of energy storage systems, photovoltaic optimizers and the like. The detection circuit 220 may be used to detect the input voltage and/or the output voltage of the voltage conversion circuit 210; the control circuit may be configured to control the dead time of some or all of the switching tubes in the voltage conversion circuit 210 according to the input voltage and/or the output voltage of the voltage conversion circuit 210, and this scheme is helpful to improve the efficiency of the power supply system compared with a conventional scheme in which the dead time of all the switching tubes in the voltage conversion circuit is fixed.
The voltage conversion circuit 210 may include various types of conversion circuits, such as a four-tube Buck-Boost circuit, a Cuk circuit, a Zeta circuit, a SEPIC circuit, and the like. The scheme in the embodiment of the application can be applied to any type of voltage conversion circuit needing to adaptively adjust the dead time of the switching tube. The voltage conversion circuit is a four-tube Buck-Boost circuit as an example, and a scheme of self-adaptive adjustment of dead time of a switching tube in the voltage conversion circuit is described in detail.
In some embodiments, the voltage converting circuit 210 may be a four-transistor Buck-Boost circuit 210, and the four-transistor Buck-Boost circuit 210 may include a power input terminal 211, a voltage output terminal 212, and a first switching transistor Q 1 A second switch tube Q 2 And a third switching tube Q 3 And a fourth switching tube Q 4 And a first inductance L c . First switch tube Q 1 Is connected to the positive pole of the power input terminal 211, and a second switching tube Q 2 Is connected with the negative pole of the power input end 211, and a third switching tube Q 3 Is connected with the positive pole of the voltage output end 212, and a fourth switching tube Q 4 Is connected to the negative pole of the voltage output terminal 212, a first inductance L c Is connected to the output terminal of the first switching tube 213, and a first inductor L c The other end of the first switch tube and a fourth switch tube Q 4 The input ends of the two are connected; it can be understood that the first switch tube Q 1 And the output end of the second switch tube Q 2 Is connected with the input end of the third switching tube Q 3 And the output end of the fourth switching tube Q 4 Are connected to each other. The power input terminal 211 is operable to receive an input voltage V in The voltage output terminal 212 may be used to output an output voltage V out . FourthlyThe tube Buck-Boost circuit 210 further includes an output terminal capacitor C f The four-transistor Buck-Boost circuit 210 may be used for the load R Ld Providing a corresponding voltage. It should be understood that the four-pipe Buck-Boost circuit 210 is the same circuit as the four-pipe Buck-Boost circuit 100 mentioned above.
The detection circuit 220 is connected to the four-transistor Buck-Boost circuit 210, and may be used to detect the input voltage V of the power input terminal 211 in the four-transistor Buck-Boost circuit 210 in And/or the output voltage V of the voltage output 212 out . The detection circuit 220 may include an analog-to-digital converter (ADC) through which real-time digital monitoring of the voltage or current in the four-transistor Buck-Boost circuit 210 may be achieved.
The control circuit 230 is connected to the detection circuit 220 and is used for detecting the input voltage V of the power input terminal 211 in And/or the output voltage V of the voltage output 212 out To control the dead time of the switching tubes in the four-tube Buck-Boost circuit 210.
It should be noted that the control circuit 230 can be based on the input voltage V of the power input terminal 211 in And/or the output voltage V of the voltage output 212 out To control the dead time of some or all of the switching tubes in the four-tube Buck-Boost circuit 210. As an example, the third switching tube Q may be fixed 3 And a fourth switching tube Q 4 The control circuit 230 may be adapted to control the voltage V according to the input voltage of the power supply input 211 in To control the first switch tube Q 1 And a second switching tube Q 2 Of the at least one switching tube. As another example, the first switching tube Q may be fixed 1 And a second switching tube Q 2 The control circuit 230 is operable to control the output voltage V of the voltage output 212 in response to the dead time out Controlling the third switch tube Q 3 And a fourth switching tube Q 4 Of the at least one switching tube. Of course, the control circuit 230 can also be based on the input voltage V in And an output voltage V out The dead time of all the switching tubes is adaptively controlled, so that the efficiency of a power supply system can be improved to the maximum extent.
The manner of controlling the dead time of each switching tube is illustrated below with reference to fig. 2.
In some embodiments, four switching transistors in the four-transistor Buck-Boost circuit 210 are generally the same type of power device. I.e. the junction capacitance of the four switching tubes is the same. Thus having C 1 ＝C 2 ＝C 3 ＝C 4 ＝C oss . If t is defined dead Is a switching tube Q 1 ～Q 4 The corresponding dead time. Definition I ZVS The minimum inductor current of ZVS can be realized when the switching tube is turned off.
For the first switch tube Q 1 And a second switching tube Q 2 To say, if the first switch tube Q is ensured 1 Or a second switch tube Q 2 After shutdown, I ZVS Can be at the first switch tube Q 1 Or a second switch tube Q 2 The dead time t between the drive signals dead Internal junction capacitor C 1 Or junction capacitance C 2 Is charged to V in While connecting the junction capacitor C 2 Or junction capacitance C 1 The voltage of (c) is released to zero. Then, t dead The requirements are as follows:
Figure BDA0003905299000000041
if it is to be ZVS Given a fixed value, it can be seen that the dead time t of the switching tube dead And an input voltage V in Is in direct proportion, so that the voltage can be adjusted according to different input voltages V in To control the first switch tube Q 1 Dead time t of dead1 Thereby, the working efficiency of the power supply system can be improved.
Similarly, for the third switch tube Q 3 And a fourth switching tube Q 4 To say, if the third switch tube Q is ensured 3 Or a fourth switching tube Q 4 After shutdown, I ZVS Can be arranged on the third switch tube Q 3 Or a fourth switching tube Q 4 Of the drive signal of dead Internal junction capacitor C 3 Or junction capacitance C 4 Is charged to V out While connecting the junction capacitor C 3 Or junction capacitance C 4 The voltage of (a) is released to zero. Then, t dead The requirements are as follows:
Figure BDA0003905299000000051
in I ZVS In the case of a fixed value, it can be seen that the dead time t of the switching tube dead And an output voltage V out Is in direct proportion, so that the output voltage V can be different out To control the fourth switch tube Q 4 Dead time t of dead4 Thereby, the working efficiency of the power supply system can be improved.
Research shows that after the four-tube Buck-Boost circuit 210 is designed, the device parameters in the four-tube Buck-Boost circuit 210 are basically fixed values. However, when the power input terminal 211 receives a different input voltage V in Or the voltage output terminal 212 outputs different output voltages V out When the minimum inductive current I of ZVS can be realized ZVS The values are varied. With an input voltage V in For example, V is illustrated in When the input voltage of (2) is 100V, the minimum inductive current I of ZVS can be realized ZVS Possibly 2mA. When V is in Is 110V, the minimum inductor current I of ZVS can be realized ZVS Possibly 2.05mA. That is, each different input voltage V in Or the output voltage V out Then there will be a different input voltage V than this in Or the output voltage V out Corresponding multiple optimum I ZVS Further, there will be a plurality of corresponding optimal dead time t of the switch tube dead . It should be noted that when the input voltage V is applied in Or the output voltage V out When determined, the minimum inductor current I of ZVS can be realized ZVS Can be based on the electric device parameters and the input voltage V in Or the output voltage V out And (4) calculating.
Based on the above analysis, the embodiment of the present application operates at different input voltages V in Lower, can correspond to the switch tubeA plurality of optimum dead time t dead Sampling is performed to obtain a first set of sampled data. Based on the first set of sampled data, an input voltage V may be established in Dead time t from the switching tube dead Thereby enabling the control circuit 230 to quickly and accurately obtain different input voltages V in Next, the switch tube corresponds to the optimal dead time t dead 。
Similarly, the embodiment of the present application can also be applied to different output voltages V out Next, a plurality of optimal dead time t corresponding to the switch tube dead Sampling is performed to obtain a second set of sampled data. From the second set of sampled data, an output voltage V may be established out Dead time t from the switching tube dead Thereby enabling the control circuit 230 to obtain different input voltages V quickly and accurately in Next, the switch tube corresponds to the optimal dead time t dead 。
In some embodiments, the control circuit 230 may be configured to vary the input voltage V according to the input voltage in And a pre-established input voltage V in Dead time t from the switching tube dead Controls the first switch tube Q according to the first mapping relation 1 Dead time t of dead1 。
In some embodiments, the control circuit 230 may be configured to vary the output voltage V based on the output voltage out And a pre-established output voltage V out Dead time t of switching tube dead The fourth switching tube Q is controlled by the second mapping relation between the first and the second switching tubes 4 Dead time t of dead4 。
It should be noted that the first switching tube Q can be controlled according to different working modes of the four-tube Buck-Boost circuit 1 And a fourth switching tube Q 4 When it is turned on, the first inductor L c Of the inductor current i Lc To achieve the optimum I ZVS . That is, for the first switch tube Q 1 And a fourth switching tube Q 4 In other words, an optimal I can be adopted ZVS To realize ZVS, and further, the first switch tube Q 1 And a fourth switching tube Q 4 Presence and I ZVS Corresponding toOptimum dead time t dead 。
In some embodiments, the input voltage V may be input based on a first set of sampled data in Dead time t from the switching tube dead The mapping relation between the input voltage V and the output voltage V is subjected to linear fitting, so that the input voltage V can be obtained in Dead time t of the first switch tube dead1 The linear relationship between:
t dead1 ＝k 1 V in +m 1 (3)
wherein k is 1 And m 1 Is a linear fitting coefficient.
Similarly, the output voltage V may also be sampled based on a second set of sampled data out Dead time t of switching tube dead Linear fitting is carried out on the mapping relation between the output voltage V and the reference voltage V, so that the output voltage V can be obtained out Dead time t of fourth switch tube dead4 The linear relationship between:
t dead4 ＝k 2 V out +m 2 (4)
wherein k is 2 And m 2 Is a linear fit coefficient.
It should be noted that the first mapping relationship may be a linear mapping relationship, such as equation (3), and/or the second mapping relationship may be a linear mapping relationship, such as equation (4).
For the second switch tube Q 2 And a third switching tube Q 3 In other words, when the second switch tube Q 2 Or a third switching tube Q 3 When it is turned on, the first inductor L c Of the inductor current i Lc Will generally be greater than the minimum inductor current I to achieve ZVS ZVS Thus to the second switch tube Q 2 Or a third switching tube Q 3 The optimal dead time of (c) is determined in different ways. Referring now to FIG. 2, the second switch Q is determined 2 Or a third switching tube Q 3 The manner of dead time of (a) is illustrated.
In some embodiments, the detection circuit 220 may also be used to detect the second switch Q 2 First inductor L at turn-on c Of the inductor current I L2 . The control circuit 230 may then be used to control the output of the voltage converter according to the input voltage V in And a second switching tube Q 2 First inductor L at turn-on c Of the inductor current I L2 To control the second switch tube Q 2 Dead time t of dead2 . The second switching tube Q can be derived from the formula (1) 2 Dead time t of dead2 The following formula is satisfied:
Figure BDA0003905299000000061
it can be seen that when the current inductive current I is detected by the detection circuit 220 L2 And an input voltage V in Then, the second switch tube Q can be calculated by substituting the formula (5) 2 Dead time t of dead2 Then, the control circuit 230 can be used to control the second switch tube Q 2 Dead time t of dead2 。
In some embodiments, the detection circuit 220 can also be used to detect the third switch tube Q 3 First inductor L at turn-on c Of the inductor current I L3 . The control circuit 230 is then operable to output the voltage V according to the output voltage out And a third switching tube Q 3 First inductor L at turn-on c Of the inductor current I L3 To control the third switch tube Q 3 Dead time t of dead3 . The third switching tube Q can be derived from the formula (2) 3 Dead time t of dead3 The following formula is satisfied:
Figure BDA0003905299000000062
it can be seen that when the current inductive current I is detected by the detection circuit 220 L3 And an input voltage V out Then, the third switch tube Q can be calculated by substituting the formula (6) 3 Dead time t of dead3 Then, the control circuit 230 can be used to control the third switch tube Q 3 Dead time t of dead3 。
In some embodiments, the reason is thatFirst switch tube Q 1 And a second switching tube Q 2 Have the same type, and the first switch tube Q 1 And a second switching tube Q 2 Having the same input voltage (i.e. the same input voltage V) in ) The second switch tube Q can be derived from equation (1) or equation (5) 2 Dead time t of dead2 The following formula is satisfied:
t dead2 I L2 ＝t dead1 I ZVS1 (7)
wherein, t dead1 Is a first switch tube Q 1 Dead time of (I) ZVS1 Is a first switch tube Q 1 First inductor L at turn-on c Can be the first switching tube Q (for example 1 Minimum inductor current to achieve ZVS), I L2 Is a second switch tube Q 2 First inductor L at turn-on c The inductor current of (2).
That is, when the second switch transistor Q is detected by the detection circuit 220 2 Inductor current I at turn-on L2 While can be mixed with I L2 、t dead1 And I ZVS1 Substituting the formula (7) to calculate the second switch tube Q 2 Dead time t of dead2 Then, the control circuit 230 can be used to control the second switch tube Q 2 Dead time t of dead2 。
In some embodiments, the third switch tube Q 3 And a fourth switching tube Q 4 Has the same type, and a third switching tube Q 3 And a fourth switching tube Q 4 Having the same output voltage (i.e. the same output voltage V) out ) The dead time t of the third switching tube can be derived from equation (2) or equation (6) dead3 The following formula is satisfied:
t dead3 I L3 ＝t dead4 I ZVS4 (8)
wherein, t dead4 Is a fourth switching tube Q 4 Dead time of (I) ZVS4 Is a fourth switching tube Q 4 First inductor L at turn-on c Inductor current (for example, the fourth switch tube Q may be used) 4 Minimum inductor current to achieve ZVS), I L3 Is a third switch tube Q 3 First inductor L at turn-on c The inductor current of (1).
That is, when the third switching transistor Q is detected by the detection circuit 220 3 Inductor current I at turn-on L3 While can be mixed with I L3 、t dead4 And I ZVS4 Substituting into formula (8) to calculate the third switch tube Q 3 Dead time t of dead3 Then, the control circuit 230 can be used to control the third switch transistor Q 3 Dead time t of dead3 。
In some embodiments, as shown in fig. 3, the first inductor L of the four-transistor Buck-Boost circuit 210 is shown in different operating modes c Of the inductor current i Lc The corresponding change waveform of (a). Wherein, the O point represents Q 2 Point a represents Q 4 Point B represents Q 1 Point C represents Q 3 The turn-off moment of (c). It can be seen that in one period T s In addition, the four-tube Buck-Boost circuit 210 has four working modes.
Working mode 1: q 1 And Q 4 Are simultaneously conducted and are applied to the first inductor L c Voltage at both ends is V in Inductor current i Lc And (4) increasing linearly.
And (3) working mode 2: q 1 And Q 3 Are simultaneously conducted and are added to the first inductor L c Voltage at both ends is V in -V out . If V in >V out While then the inductive current i Lc Linearly increasing; if V in ≤V out Then the inductive current i Lc The linearity decreases.
Working mode 3: q 2 And Q 3 Are simultaneously conducted and are applied to the first inductor L c The voltage across is-V out Inductor current i Lc The linearity decreases.
The working mode 4 is as follows: q 2 And Q 4 Are simultaneously conducted and are applied to the first inductor L c Voltage at both ends is 0, inductor current i Lc Remain unchanged.
To make the first inductance L c Of the inductor current i Lc Pulsation and effectiveness ofThe value is minimum, and the switching tube Q can be ensured 2 And Q 3 Are simultaneously turned off, and Q 4 Prior to Q 1 And (4) turning off. At this time, the first inductance L c Of the inductor current i Lc Will remain at a fixed non-zero negative value-I ZVS Similar to the inductor current critical conduction mode, it can be called pseudo critical conduction mode (PBCM).
Based on the above analysis, when the four-transistor Buck-Boost circuit 210 operates under PBCM and the load is reduced, to ensure i Lc Should be made to shift the current in the AB segment down in parallel. At this time, point a moves to the left and point B moves to the right. Accordingly, Q 4 Is reduced, Q 1 The duty cycle of (c) is increased.
It should be noted that, with continued reference to fig. 3, the inductor currents at points a and B are respectively denoted as i LcA And i LcB . If the load is gradually reduced, i LcA And i LcB And is correspondingly reduced. If the load current is reduced to the critical current value, i.e., i LcA Or i LcB Is reduced to I ZVS . As shown in FIG. 4 (a), if V in <V out While, the second switch tube Q 2 ZVS can just be implemented. As shown in FIG. 4 (b), if V in >V out While, the third switch tube Q 3 ZVS can just be implemented. Further, if the load continues to be reduced, Q is 3 Or Q 2 ZVS cannot be implemented.
According to the scheme, the dead time of the switching tube can be adjusted in a self-adaptive mode, and therefore the conversion efficiency of the power supply system is improved.
An embodiment of the present application further provides an electronic device including any one of the power supply systems mentioned above. The electronic device may be, for example, a mobile phone (mobile phone), a tablet computer (pad), a palm computer, a wearable device, and the like, which is not limited in this application.
The above describes the embodiment of the power supply system of the present application in detail with reference to fig. 1 to 4, and the following describes the embodiment of the control method of the power supply system of the present application in detail with reference to fig. 5 and 6. It is to be understood that the description of the method embodiments corresponds to the description of the power supply system embodiments, and therefore reference may be made to the previous method embodiments for parts not described in detail.
Fig. 5 is a schematic flowchart illustrating a control method of a power supply system according to an embodiment of the present application. The power supply system includes a voltage conversion circuit, and the method 500 includes: s520 to S540.
In step S520, an input voltage and/or an output voltage of the voltage conversion circuit is detected.
In step S540: and controlling the dead time of a switching tube in the voltage conversion circuit according to the input voltage and/or the output voltage.
Optionally, the voltage conversion circuit is a four-transistor Buck-Boost circuit, and the four-transistor Buck-Boost circuit includes: a power input for receiving the input voltage; a voltage output terminal for outputting the output voltage; the power supply comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube and a first inductor, wherein the input end of the first switch tube is connected with the positive electrode of the power supply input end, the output end of the second switch tube is connected with the negative electrode of the power supply input end, the input end of the third switch tube is connected with the positive electrode of the voltage output end, the output end of the fourth switch tube is connected with the negative electrode of the voltage output end, one end of the first inductor is connected with the output end of the first switch tube, and the other end of the first inductor is connected with the input end of the fourth switch tube; the controlling the dead time of a switching tube in the four-tube Buck-Boost circuit according to the input voltage and/or the output voltage comprises the following steps: controlling the dead time of at least one of the first switching tube and the second switching tube according to the input voltage; and/or controlling the dead time of at least one of the third switching tube and the fourth switching tube according to the output voltage.
Optionally, the controlling dead time of a switching tube in the four-tube Buck-Boost circuit according to the input voltage and/or the output voltage includes: controlling the dead time of the first switching tube according to the input voltage and a pre-established first mapping relation between the input voltage and the dead time of the switching tube; and/or controlling the dead time of the fourth switching tube according to the output voltage and a pre-established second mapping relation between the output voltage and the dead time of the switching tube.
Optionally, the first mapping relationship is: t is t dead1 ＝k 1 V in +m 1 Wherein t is dead1 Is the dead time of the first switching tube, V in For the input voltage, k 1 And m 1 Is a linear fitting coefficient; and/or the second mapping relation is: t is t dead4 ＝k 2 V out +m 2 Wherein t is dead4 Is dead time of the fourth switching tube, V out For the output voltage, k 2 And m 2 Is a linear fitting coefficient.
Optionally, the method further comprises: detecting the inductive current of the first inductor when the second switch tube is switched on; and controlling the dead time of the second switch tube according to the input voltage and the inductive current of the first inductor when the second switch tube is switched on.
Optionally, dead time t of the second switch tube dead2 The following formula is satisfied: t is t dead2 I L2 ＝t dead1 I ZVS1 Wherein t is dead1 Is the dead time of the first switching tube, I ZVS1 The inductive current, I, of the first inductor when the first switch tube is switched on L2 And the inductive current of the first inductor is obtained when the second switch tube is switched on.
Optionally, the method further comprises: detecting the inductive current of the first inductor when the third switching tube is switched on; and controlling the dead time of the third switching tube according to the input voltage and the inductive current of the first inductor when the third switching tube is switched on.
Optionally, dead time t of the third switch tube dead3 The following formula is satisfied: t is t dead3 I L3 ＝t dead4 I ZVS4 Wherein t is dead4 Is dead zone of the fourth switching tubeM, I ZVS4 The inductive current, I, of the first inductor when the fourth switch tube is switched on L3 And the inductive current of the first inductor is obtained when the third switching tube is switched on.
A control device 600 of a power supply system in the embodiment of the present application is described below with reference to fig. 6. The dashed lines in fig. 6 indicate that the unit or module is optional. The apparatus 600 may be used to implement the methods described in the method embodiments above. The apparatus 600 may be a computer or any type of electronic device.
The apparatus 600 may include one or more processors 610. The processor 610 may enable the apparatus 600 to implement the methods described in the previous method embodiments.
The apparatus 600 may also include one or more memories 620. The memory 620 has stored thereon a program that can be executed by the processor 610 to cause the processor 610 to perform the methods described in the previous method embodiments. The memory 620 may be separate from the processor 610 or may be integrated in the processor 610.
The apparatus 600 may also include a transceiver 630. The processor 610 may communicate with other devices through the transceiver 630. For example, the processor 610 may transmit and receive data with other devices through the transceiver 630.
The embodiment of the application also provides a machine-readable storage medium for storing the program. And the program causes a computer to execute the method in the embodiments of the present application.
The embodiment of the application also provides a computer program product. The computer program product includes a program. The program causes a computer to execute the method in the embodiments of the present application.
In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware or any other combination. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the disclosure are, in whole or in part, generated when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a machine-readable storage medium or transmitted from one machine-readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The machine-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a Digital Video Disc (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (17)

1. A power supply system, comprising:
a voltage conversion circuit;
a detection circuit for detecting an input voltage and/or an output voltage of the voltage conversion circuit;
and the control circuit is connected with the detection circuit and is used for controlling the dead time of a switching tube in the voltage conversion circuit according to the input voltage and/or the output voltage.
2. The power supply system of claim 1, wherein the voltage conversion circuit is a four-transistor Buck-Boost circuit comprising:
a power input for receiving the input voltage;
a voltage output terminal for outputting the output voltage;
the power supply comprises a first switching tube, a second switching tube, a third switching tube, a fourth switching tube and a first inductor, wherein the input end of the first switching tube is connected with the positive electrode of the power supply input end, the output end of the second switching tube is connected with the negative electrode of the power supply input end, the input end of the third switching tube is connected with the positive electrode of the voltage output end, the output end of the fourth switching tube is connected with the negative electrode of the voltage output end, one end of the first inductor is connected with the output end of the first switching tube, and the other end of the first inductor is connected with the input end of the fourth switching tube;
the control circuit is used for controlling the dead time of at least one switching tube in the first switching tube and the second switching tube according to the input voltage; and/or
The control circuit is used for controlling the dead time of at least one of the third switching tube and the fourth switching tube according to the output voltage.
3. The power supply system according to claim 2,
the control circuit is used for controlling the dead time of the first switching tube according to the input voltage and a pre-established first mapping relation between the input voltage and the dead time of the switching tube; and/or
The control circuit is used for controlling the dead time of the fourth switching tube according to the output voltage and a pre-established second mapping relation between the output voltage and the dead time of the switching tube.
4. The power supply system of claim 3,
the first mapping relationship is: t is t dead1 ＝k 1 V in +m 1 Wherein t is dead1 Is the dead time of the first switching tube, V in For the input voltage, k 1 And m 1 Is a linear fitting coefficient; and/or
The second mapping relation is as follows: t is t dead4 ＝k 2 V out +m 2 Wherein t is dead4 Is dead time of the fourth switching tube, V out For the output voltage, k 2 And m 2 Is a linear fitting coefficient.
5. The power supply system according to claim 2,
the detection circuit is also used for detecting the inductive current of the first inductor when the second switch tube is switched on;
the control circuit is used for controlling the dead time of the second switch tube according to the input voltage and the inductive current of the first inductor when the second switch tube is switched on.
6. The power supply system of claim 5, wherein the dead time t of the second switching tube dead2 The following formula is satisfied: t is t dead2 I L2 ＝t dead1 I ZVS1 Wherein t is dead1 Is the dead time of the first switching tube, I ZVS1 The inductive current, I, of the first inductor when the first switch tube is switched on L2 And the inductor current of the first inductor is obtained when the second switch tube is switched on.
7. The power supply system according to claim 2,
the detection circuit is also used for detecting the inductive current of the first inductor when the third switching tube is switched on;
the control circuit is used for controlling the dead time of the third switching tube according to the input voltage and the inductive current of the first inductor when the third switching tube is switched on.
8. The power supply system of claim 7, wherein the dead time t of the third switching tube dead3 The following formula is satisfied: t is t dead3 I L3 ＝t dead4 I ZVS4 Wherein t is dead4 Is dead time of the fourth switching tube, I ZVS4 The inductive current, I, of the first inductor when the fourth switch tube is switched on L3 And the inductive current of the first inductor is obtained when the third switching tube is switched on.
9. A method of controlling a power supply system, the method comprising:
detecting an input voltage and/or an output voltage of the voltage conversion circuit;
and controlling the dead time of a switching tube in the voltage conversion circuit according to the input voltage and/or the output voltage.
10. The control method of claim 9, wherein the voltage conversion circuit is a four-transistor Buck-Boost circuit, the four-transistor Buck-Boost circuit comprising:
a power input for receiving the input voltage;
a voltage output terminal for outputting the output voltage;
the power supply comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube and a first inductor, wherein the input end of the first switch tube is connected with the positive electrode of the power supply input end, the output end of the second switch tube is connected with the negative electrode of the power supply input end, the input end of the third switch tube is connected with the positive electrode of the voltage output end, the output end of the fourth switch tube is connected with the negative electrode of the voltage output end, one end of the first inductor is connected with the output end of the first switch tube, and the other end of the first inductor is connected with the input end of the fourth switch tube;
the controlling the dead time of a switching tube in the four-tube Buck-Boost circuit according to the input voltage and/or the output voltage comprises the following steps:
according to the input voltage, controlling the dead time of at least one switching tube in the first switching tube and the second switching tube; and/or
And controlling the dead time of at least one of the third switching tube and the fourth switching tube according to the output voltage.
11. The control method according to claim 10, wherein the controlling dead time of a switching tube in the four-tube Buck-Boost circuit according to the input voltage and/or the output voltage comprises:
controlling the dead time of the first switching tube according to the input voltage and a pre-established first mapping relation between the input voltage and the dead time of the switching tube; and/or
And controlling the dead time of the fourth switching tube according to the output voltage and a pre-established second mapping relation between the output voltage and the dead time of the switching tube.
12. The control method according to claim 11,
the first mapping relationship is: t is t dead1 ＝k 1 V in +m 1 Wherein t is dead1 Is the dead time of the first switching tube, V in For the input voltage, k 1 And m 1 Is a linear fitting coefficient; and/or
The second mapping relationship is as follows: t is t dead4 ＝k 2 V out +m 2 Wherein t is dead4 Is the dead time of the fourth switching tube, V out Is the output voltage, k 2 And m 2 Is a linear fitting coefficient.
13. The control method according to claim 10, characterized in that the method further comprises:
detecting the inductive current of the first inductor when the second switch tube is switched on;
and controlling the dead time of the second switch tube according to the input voltage and the inductive current of the first inductor when the second switch tube is switched on.
14. The control method according to claim 13,dead time t of the second switch tube dead2 The following formula is satisfied: t is t dead2 I L2 ＝t dead1 I ZVS1 Wherein t is dead1 Is the dead time of the first switching tube, I ZVS1 The inductive current, I, of the first inductor when the first switch tube is switched on L2 And the inductor current of the first inductor is obtained when the second switch tube is switched on.
15. The control method according to claim 10, characterized in that the method further comprises:
detecting the inductive current of the first inductor when the third switching tube is switched on;
and controlling the dead time of the third switching tube according to the input voltage and the inductive current of the first inductor when the third switching tube is switched on.
16. The control method according to claim 15, wherein the dead time t of the third switching tube dead3 The following formula is satisfied: t is t dead3 I L3 ＝t dead4 I ZVS4 Wherein t is dead4 Is the dead time of the fourth switching tube, I ZVS4 The inductive current, I, of the first inductor when the fourth switch tube is switched on L3 And the inductive current of the first inductor is obtained when the third switching tube is switched on.
17. An electronic device characterized in that it comprises a power supply system according to any one of claims 1-8.
CN202211302298.2A 2022-10-24 2022-10-24 Power supply system, control method thereof and electronic equipment Pending CN115514232A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211302298.2A CN115514232A (en) 2022-10-24 2022-10-24 Power supply system, control method thereof and electronic equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211302298.2A CN115514232A (en) 2022-10-24 2022-10-24 Power supply system, control method thereof and electronic equipment

Publications (1)

Publication Number Publication Date
CN115514232A true CN115514232A (en) 2022-12-23

Family

ID=84512245

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211302298.2A Pending CN115514232A (en) 2022-10-24 2022-10-24 Power supply system, control method thereof and electronic equipment

Country Status (1)

Country Link
CN (1) CN115514232A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116667638A (en) * 2023-05-30 2023-08-29 南京理工大学 Linear-nonlinear peak current control strategy based on ZVS four-switch Buck-Boost circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116667638A (en) * 2023-05-30 2023-08-29 南京理工大学 Linear-nonlinear peak current control strategy based on ZVS four-switch Buck-Boost circuit
CN116667638B (en) * 2023-05-30 2024-05-07 南京理工大学 Linear-nonlinear peak current control strategy based on ZVS four-switch Buck-Boost circuit

Similar Documents

Publication Publication Date Title
EP2911282A1 (en) Power source and power source voltage regulating method
US10230275B2 (en) Power supply device, and control method of power supply device
US20220115953A1 (en) Multi-stage power converter with transformless switched-capacitor converter and control
CN115514232A (en) Power supply system, control method thereof and electronic equipment
CN103683919A (en) High-power-factor low-harmonic-distortion constant current circuit and device
CN107834875A (en) A kind of frequency control circuit and its control method and switched mode converter
TW201541838A (en) Flyback active clamping power converter
CN103840661A (en) Buck power converter
Zhao et al. A novel transformerless high step‐Up DC‐DC converter with active switched‐inductor and quasi‐Z‐source network
CN114499171A (en) Multi-mode voltage conversion circuit, multi-mode voltage conversion device, multi-mode voltage conversion control method, and storage medium
CN113346750A (en) Soft switching in-phase buck-boost converter based on coupling inductor and control method
CN104362839A (en) Four-tube converter control circuit, four-tube converter and light load control method of four-tube converter
CN109428476B (en) Analog control device of power factor correction circuit
CN112803778A (en) Power module and power system
CN109802567B (en) Switching power supply and inductive current reconstruction method thereof
CN111786553A (en) Efficient bidirectional four-pipe BUCK-BOOST converter
CN106160458B (en) Improve the BOOST circuit of transient response
CN110677027A (en) Clamping type boosting power conversion circuit
WO2016082418A1 (en) Power factor control method and apparatus
US9843257B2 (en) Set point independent regulation of a switched mode power converter
CN214154345U (en) Power module and power system
CN103427619A (en) PFC control circuit with capability of flexible boosting and control method thereof
CN102097935B (en) Buck power supply converter and method thereof
CN203590035U (en) High-power factor low-harmonic distortion constant current circuit and device
CN109768696B (en) Variable on-resistance switching device for a boost converter for thermoelectric energy harvesting

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