CN113472199B - Mode smooth switching method and system of Buck-Boost circuit - Google Patents
Mode smooth switching method and system of Buck-Boost circuit Download PDFInfo
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- CN113472199B CN113472199B CN202110741850.7A CN202110741850A CN113472199B CN 113472199 B CN113472199 B CN 113472199B CN 202110741850 A CN202110741850 A CN 202110741850A CN 113472199 B CN113472199 B CN 113472199B
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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
- H02M3/02—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
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses a mode smooth switching method and a mode smooth switching system of a Buck-Boost circuit, wherein the method comprises the steps of obtaining a duty ratio D output by a control loop connected with the Buck-Boost circuit; and giving a duty ratio D to the fourth MOSFET, giving a duty ratio 1-D to the third MOSFET, giving a duty ratio 1+ D to the first MOSFET, and giving a duty ratio-D to the second MOSFET, so that the mode of the Buck-Boost circuit is automatically and smoothly switched. According to the mode smooth switching method and system of the Buck-Boost circuit, the value is assigned to each MOSFET according to the duty ratio output by the control loop, so that the self-adaptive smooth switching of three modes, namely the Buck mode, the Boost mode and the Buck-Boost mode can be realized without other conditions, and the output voltage is stable.
Description
Technical Field
The invention relates to the technical field of Buck-Boost circuits, in particular to a method and a system for mode smooth switching of a Buck-Boost circuit.
Background
The four-switch Buck-boost converter has the advantages of low switching loss, scalable output voltage and the like, so that the four-switch Buck-boost converter is concerned by people since the date of the introduction, and becomes a DC/DC circuit topology which is widely applied in recent years.
At present, when a Buck mode and a Boost mode of a four-switch Buck-Boost circuit are switched to the Buck-Boost mode by a traditional control method, output voltage jumps at the switching point, and smooth switching of three modes cannot be achieved. Moreover, the conventional method adopts the condition of the output voltage to judge which mode is, and if the condition is not reasonable, the three modes can be switched back and forth, so that the output voltage jumps.
Therefore, how to provide a new four-switch Buck-Boost circuit control technology is one of the important issues in the field.
The above information is given as background information only to aid in understanding the present disclosure, and no determination or admission is made as to whether any of the above is available as prior art against the present disclosure.
Disclosure of Invention
The invention provides a mode smooth switching method and a mode smooth switching system of a Buck-Boost circuit, which aim to overcome the defects of the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, an embodiment of the present invention provides a mode smoothing switching method for a Buck-Boost circuit, where the Buck-Boost circuit is a four-switch Buck-Boost circuit, and includes a power input end, a voltage output end, a first MOSFET tube, a second MOSFET tube, a third MOSFET tube, a fourth MOSFET tube, a filter inductor, an input filter capacitor, and an output filter capacitor, where an input end of the first MOSFET tube is connected to an anode of the power input end, an output end of the first MOSFET tube is connected to an input end of the second MOSFET tube, an output end of the second MOSFET tube is connected to a cathode of the power input end, an input end of the third MOSFET tube is connected to an anode of the voltage output end, an output end of the third MOSFET tube is connected to an input end of the fourth MOSFET tube, an output end of the fourth MOSFET tube is connected to a cathode of the voltage output end, and the filter inductor is connected between the output end of the first MOSFET tube and the output end of the third MOSFET tube, the input filter capacitor is connected between the positive pole and the negative pole of the power input end, the output filter capacitor is connected between the positive pole and the negative pole of the voltage output end, and the method comprises the following steps:
acquiring a duty ratio D output by a control loop connected with the Buck-Boost circuit;
and assigning a duty ratio D to the fourth MOSFET, assigning duty ratios 1-D to the third MOSFET, assigning duty ratios 1+ D to the first MOSFET and assigning duty ratios-D to the second MOSFET, thereby realizing automatic and smooth switching of the mode of the Buck-Boost circuit.
Further, in the mode smooth switching method of the Buck-Boost circuit, the method further includes:
if the Dead zone Dead _ Time of the third MOSFET tube meets the conditions that D is less than or equal to Dead _ Time and PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the third MOSFET tube to enable the driving of the third MOSFET tube to be in smooth transition;
wherein PreD is the duty cycle of the previous beat.
Further, in the mode smoothing switching method of the Buck-Boost circuit, a calculation formula when the Dead zone Dead _ Time of the third MOSFET tube is modified is Dead _ Time ═ 2 × D.
Further, in the mode smooth switching method of the Buck-Boost circuit, the method further includes:
if the Dead zone Dead _ Time of the first MOSFET tube meets the conditions that-D is less than or equal to Dead _ Time and-PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the first MOSFET tube to enable the driving of the first MOSFET tube to be in smooth transition;
wherein PreD is the duty cycle of the previous beat.
Further, in the mode smoothing switching method of the Buck-Boost circuit, a calculation formula when the Dead zone Dead _ Time of the first MOSFET tube is modified is-2 × D.
In a second aspect, an embodiment of the present invention provides a mode smooth switching system for a Buck-Boost circuit, where the system includes:
the duty ratio acquisition module is used for acquiring a duty ratio D output by a control loop connected with the Buck-Boost circuit;
and the duty ratio giving module is used for assigning a duty ratio D to the fourth MOSFET, assigning duty ratios 1-D to the third MOSFET, assigning duty ratios 1+ D to the first MOSFET and assigning duty ratios-D to the second MOSFET, so that the mode of the Buck-Boost circuit is automatically and smoothly switched.
Further, in the mode smooth switching system of the Buck-Boost circuit, the system further includes a first modification module:
if the Dead zone Dead _ Time of the third MOSFET meets the conditions that D is less than or equal to Dead _ Time and PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the third MOSFET so as to enable the drive of the third MOSFET to be in smooth transition;
wherein PreD is the duty cycle of the previous beat.
Further, in the mode smooth switching system of the Buck-Boost circuit, a calculation formula of the first modification module when modifying the Dead zone Dead _ Time of the third MOSFET tube is set to be Dead _ Time-2 × D.
Further, in the mode smooth switching system of the Buck-Boost circuit, the system further includes a second modification module:
if the Dead zone Dead _ Time of the first MOSFET tube meets the conditions that-D is less than or equal to Dead _ Time and-PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the first MOSFET tube to enable the driving of the first MOSFET tube to be in smooth transition;
wherein PreD is the duty cycle of the previous beat.
Further, in the mode smooth switching system of the Buck-Boost circuit, a calculation formula of the second modification module when modifying the Dead zone Dead _ Time of the first MOSFET tube is-2 × D.
According to the mode smooth switching method and system of the Buck-Boost circuit, the value is assigned to each MOSFET according to the duty ratio output by the control loop, so that the self-adaptive smooth switching of three modes, namely the Buck mode, the Boost mode and the Buck-Boost mode can be realized without other conditions, and the output voltage is stable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic circuit diagram of a four-switch Buck-Boost circuit according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a mode smooth switching method of a Buck-Boost circuit according to an embodiment of the present invention;
fig. 3 is a functional block schematic diagram of a mode smoothing switching system of a Buck-Boost circuit according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Furthermore, the terms "long", "short", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the referred devices or elements must have the specific orientations, be configured to operate in the specific orientations, and thus are not to be construed as limitations of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example one
In view of the above-mentioned drawbacks of the conventional Buck-Boost circuit control technology, the applicant of the present invention is based on practical experience and professional knowledge that are abundant over many years in the field, and actively performs research and innovation in cooperation with the application of theory, so as to hopefully create a technology capable of solving the drawbacks of the prior art, so that the Buck-Boost circuit control technology has higher practicability. After continuous research and design and repeated trial production and improvement, the invention with practical value is finally created.
Referring to fig. 2, an embodiment of the present invention provides a mode smoothing switching method for a Buck-Boost circuit, where the Buck-Boost circuit is a four-switch Buck-Boost circuit, as shown in fig. 1, the four-switch Buck-Boost circuit includes a power input terminal, a voltage output terminal, a first MOSFET tube Q1, a second MOSFET tube Q2, a third MOSFET tube Q3, a fourth MOSFET tube Q4, a filter inductor L1, an input filter capacitor C1, and an output filter capacitor C2, an input terminal of the first MOSFET tube Q1 is connected to a positive electrode BAT + of the power input terminal, an output terminal of the first MOSFET tube Q1 is connected to an input terminal of the second MOSFET tube Q2, an output terminal of the second MOSFET tube Q2 is connected to a negative electrode BAT-of the power input terminal, an input terminal of the third MOSFET tube Q3 is connected to a positive electrode DC + of the voltage output terminal, an output terminal of the third MOSFET tube Q3 is connected to a negative electrode BAT-input terminal of the fourth MOSFET tube Q4, an output terminal of the fourth MOSFET Q4 is connected to a negative terminal of the voltage output terminal DC-, the filter inductor L1 is connected between an output terminal of the first MOSFET Q1 and an output terminal of the third MOSFET Q3, the input filter capacitor C1 is connected between a positive terminal BAT + and a negative terminal BAT-of the power input terminal, and the output filter capacitor C2 is connected between a positive terminal DC + and a negative terminal DC-of the voltage output terminal, the method comprising:
and S101, obtaining a duty ratio D output by a control loop connected with the Buck-Boost circuit.
S102, assigning a duty ratio D to the fourth MOSFET Q4, assigning duty ratios 1-D to the third MOSFET Q3, assigning duty ratios 1+ D to the first MOSFET Q1 and assigning duty ratios-D to the second MOSFET Q2, and realizing automatic and smooth switching of the mode of the Buck-Boost circuit.
It should be noted that, in this embodiment, according to the duty ratio D obtained by the final output of the control loop, the duty ratio D is assigned to the fourth MOSFET tube Q4, 1 to D is assigned to the third MOSFET tube Q3, 1+ D is assigned to the first MOSFET tube Q1, and-D is assigned to the second MOSFET tube Q2, and the duty ratio is assigned according to this method, so that the adaptive smooth switching of the Buck mode, the Boost mode, and the Buck-Boost mode can be realized, and thus, the mode does not need to be switched according to the output voltage as a condition, and the output voltage is stable.
In addition, because the traditional upper and lower tube complementary wave-sending mode has a dead zone, the full duty ratio cannot be obtained, and the circuit topology needs the full duty ratio when the input and output voltages are equal, at this time, if 5% of the dead zone exists, only 95% of the duty ratio can be obtained, and when the duty ratio is greater than 95%, the duty ratio of the upper tube is enabled to be constantly switched on, the duty ratio is directly jumped from 95% to 100%, so that the output current fluctuates when the input and output voltages are close to each other. Therefore, in this embodiment, the method further includes:
if the Dead zone Dead _ Time of the third MOSFET tube Q3 satisfies D ≤ Dead _ Time and PreD ≤ Dead _ Time, modifying the Dead zone Dead _ Time of the third MOSFET tube Q3 to make the driving of the third MOSFET tube Q3 transition smoothly;
wherein PreD is the duty cycle of the previous beat.
The calculation formula when modifying the Dead zone Dead _ Time of the third MOSFET Q3 is Dead _ Time — 2 × D.
The Dead zone Dead _ Time of the first MOSFET transistor Q1 is modified based on the same theory, that is, in this embodiment, the method further includes:
if the Dead zone Dead _ Time of the first MOSFET tube Q1 satisfies-D is less than or equal to Dead _ Time and-PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the first MOSFET tube Q1 to make the driving of the first MOSFET tube Q1 smoothly transited;
wherein PreD is the duty cycle of the previous beat.
And, the calculation formula when modifying Dead zone Dead _ Time of the first MOSFET Q1 is-2 × D.
It should be noted that, by modifying the Dead zone Dead _ Time of the two upper transistors, i.e., the first MOSFET Q1 and the third MOSFET Q3, in the above manner, so that the driving of the first MOSFET Q1 and the third MOSFET Q3 is smoothly transited, there is no phenomenon of duty cycle jump
According to the mode smooth switching method of the Buck-Boost circuit, the value is assigned to each MOSFET according to the duty ratio output by the control loop, so that the self-adaptive smooth switching of three modes, namely the Buck mode, the Boost mode and the Buck-Boost mode can be realized without other conditions, and the output voltage is stable.
Example two
Referring to fig. 3, a second embodiment of the present invention provides a mode smoothing switching system for a Buck-Boost circuit, which is suitable for executing the mode smoothing switching method for the Buck-Boost circuit provided in the second embodiment of the present invention. The system specifically comprises the following modules:
a duty ratio obtaining module 201, configured to obtain a duty ratio D output by a control loop connected to the Buck-Boost circuit;
and the duty ratio giving module 202 is used for assigning a duty ratio D to the fourth MOSFET, assigning duty ratios 1-D to the third MOSFET, assigning duty ratios 1+ D to the first MOSFET, and assigning duty ratios-D to the second MOSFET, so that the mode of the Buck-Boost circuit is automatically and smoothly switched.
Preferably, the system further comprises a first modification module:
if the Dead zone Dead _ Time of the third MOSFET tube meets the conditions that D is less than or equal to Dead _ Time and PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the third MOSFET tube to enable the driving of the third MOSFET tube to be in smooth transition;
wherein PreD is the duty cycle of the previous beat.
Preferably, the calculation formula of the first modification module when modifying the Dead zone Dead _ Time of the third MOSFET transistor is Dead _ Time — 2 × D.
Preferably, the system further comprises a second modification module:
if the Dead zone Dead _ Time of the first MOSFET tube meets the conditions that-D is less than or equal to Dead _ Time and-PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the first MOSFET tube to enable the driving of the first MOSFET tube to be in smooth transition;
wherein PreD is the duty cycle of the previous beat.
Preferably, the calculation formula of the second modification module when modifying the Dead zone Dead _ Time of the first MOSFET tube is-2 × D.
According to the mode smooth switching system of the Buck-Boost circuit, disclosed by the embodiment of the invention, each MOSFET is assigned with a value according to the duty ratio output by the control loop, so that the self-adaptive smooth switching of three modes, namely the Buck mode, the Boost mode and the Buck-Boost mode, can be realized without other conditions, and the output voltage is stable.
The foregoing description of the embodiments has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. The same elements or features may also vary in many respects. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
Example embodiments are provided so that this disclosure will be thorough and will fully convey the scope to those skilled in the art. Numerous details are set forth, such as examples of specific parts, devices, and methods, in order to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In certain example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.
The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises" and "comprising" are intended to be inclusive and therefore specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order discussed and illustrated, unless explicitly indicated as an order of performance. It should also be understood that additional or alternative steps may be employed.
When an element or layer is referred to as being "on" … … "," engaged with "… …", "connected to" or "coupled to" another element or layer, it can be directly on, engaged with, connected to or coupled to the other element or layer, or intervening elements or layers may also be present. In contrast, when an element or layer is referred to as being "directly on … …", "directly engaged with … …", "directly connected to" or "directly coupled to" another element or layer, there may be no intervening elements or layers present. Other words used to describe the relationship of elements should be interpreted in a similar manner (e.g., "between … …" and "directly between … …", "adjacent" and "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region or section from another element, component, region or section. Unless clearly indicated by the context, use of terms such as the terms "first," "second," and other numerical values herein does not imply a sequence or order. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
Spatially relative terms, such as "inner," "outer," "below," "… …," "lower," "above," "upper," and the like, may be used herein for ease of description to describe a relationship between one element or feature and one or more other elements or features as illustrated in the figures. Spatially relative terms may be intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below … …" can encompass both an orientation of facing upward and downward. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors herein interpreted.
Claims (2)
1. A mode smooth switching method of a Buck-Boost circuit is disclosed, the Buck-Boost circuit is a four-switch Buck-Boost circuit and comprises a power input end, a voltage output end, a first MOSFET tube, a second MOSFET tube, a third MOSFET tube, a fourth MOSFET tube, a filter inductor, an input filter capacitor and an output filter capacitor, the input end of the first MOSFET tube is connected with the anode of the power input end, the output end of the first MOSFET tube is connected with the input end of the second MOSFET tube, the output end of the second MOSFET tube is connected with the cathode of the power input end, the input end of the third MOSFET tube is connected with the anode of the voltage output end, the output end of the third MOSFET tube is connected with the input end of the fourth MOSFET tube, the output end of the fourth MOSFET tube is connected with the cathode of the voltage output end, the filter inductor is connected between the output end of the first MOSFET tube and the output end of the third MOSFET tube, the input filter capacitor is connected between the anode and the cathode of the power input end, and the output filter capacitor is connected between the anode and the cathode of the voltage output end, and the method is characterized by comprising the following steps:
acquiring a duty ratio D output by a control loop connected with the Buck-Boost circuit;
giving a duty ratio D to the fourth MOSFET, giving a duty ratio 1-D to the third MOSFET, giving a duty ratio 1+ D to the first MOSFET, and giving a duty ratio-D to the second MOSFET, so as to realize automatic and smooth switching of the mode of the Buck-Boost circuit;
the method further comprises the following steps:
if the Dead zone Dead _ Time of the third MOSFET tube meets the conditions that D is less than or equal to Dead _ Time and PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the third MOSFET tube to enable the driving of the third MOSFET tube to be in smooth transition;
wherein PreD is the duty cycle of the previous beat;
modifying a calculation formula when the Dead zone Dead _ Time of the third MOSFET is 2 × D;
the method further comprises the following steps:
if the Dead zone Dead _ Time of the first MOSFET tube meets the conditions that-D is less than or equal to Dead _ Time and-PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the first MOSFET tube to enable the driving of the first MOSFET tube to be in smooth transition;
wherein PreD is the duty ratio of the previous beat;
the calculation formula when modifying the Dead zone Dead _ Time of the first MOSFET tube is-2 × D.
2. A mode smoothing switching system for a Buck-Boost circuit, the system comprising:
the duty ratio acquisition module is used for acquiring a duty ratio D output by a control loop connected with the Buck-Boost circuit;
the duty ratio giving module is used for giving a duty ratio D to the fourth MOSFET, giving a duty ratio 1-D to the third MOSFET, giving a duty ratio 1+ D to the first MOSFET and giving a duty ratio-D to the second MOSFET so as to realize automatic and smooth switching of the mode of the Buck-Boost circuit;
the system also includes a first modification module:
if the Dead zone Dead _ Time of the third MOSFET tube meets the conditions that D is less than or equal to Dead _ Time and PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the third MOSFET tube to enable the driving of the third MOSFET tube to be in smooth transition;
wherein PreD is the duty ratio of the previous beat;
the calculation formula of the first modification module when modifying the Dead zone Dead _ Time of the third MOSFET tube is 2 × D;
the system also includes a second modification module:
if the Dead zone Dead _ Time of the first MOSFET tube meets the conditions that D is less than or equal to Dead _ Time and PreD is less than or equal to Dead _ Time, modifying the Dead zone Dead _ Time of the first MOSFET tube to enable the drive of the first MOSFET tube to be in smooth transition;
wherein PreD is the duty ratio of the previous beat;
the calculation formula of the second modification module when modifying the Dead zone Dead _ Time of the first MOSFET tube is-2 × D.
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| CN202110741850.7A CN113472199B (en) | 2021-06-30 | 2021-06-30 | Mode smooth switching method and system of Buck-Boost circuit |
| PCT/CN2022/071614 WO2023273300A1 (en) | 2021-06-30 | 2022-01-12 | Method and system for smoothly switching modes of buck-boost circuit |
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| CN113472199B (en) * | 2021-06-30 | 2022-09-27 | 易事特集团股份有限公司 | Mode smooth switching method and system of Buck-Boost circuit |
| CN114336878A (en) * | 2022-01-04 | 2022-04-12 | 易事特集团股份有限公司 | Control method, DC-DC module and storage medium |
| CN115425851B (en) * | 2022-11-03 | 2023-03-24 | 广东高斯宝电气技术有限公司 | Control method of LLC resonant converter |
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| CN111181397B (en) * | 2020-01-14 | 2023-05-05 | 上海电力大学 | Three-mode control method of four-switch buck-boost converter |
| CN113472199B (en) * | 2021-06-30 | 2022-09-27 | 易事特集团股份有限公司 | Mode smooth switching method and system of Buck-Boost circuit |
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2021
- 2021-06-30 CN CN202110741850.7A patent/CN113472199B/en active Active
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- 2022-01-12 WO PCT/CN2022/071614 patent/WO2023273300A1/en unknown
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| CN106685191A (en) * | 2017-03-24 | 2017-05-17 | 阳光电源股份有限公司 | Multi-mode control method and device |
| CN109067178A (en) * | 2018-09-05 | 2018-12-21 | 深圳华中科技大学研究院 | A kind of control system and method for same phase buck-boost converter mode smooth switching |
| CN110912405A (en) * | 2019-10-18 | 2020-03-24 | 杭州东氿科技有限公司 | Four-switch buck-boost converter based on voltage mode control |
| CN110768528A (en) * | 2019-11-13 | 2020-02-07 | 清华大学 | Control method for smooth switching of working modes of non-reverse Buck-Boost circuit |
| CN110994988A (en) * | 2019-12-31 | 2020-04-10 | 深圳英集芯科技有限公司 | BUCK-BOOST converter circuit and control method thereof |
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| CN113472199A (en) | 2021-10-01 |
| WO2023273300A1 (en) | 2023-01-05 |
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