CN117977958B - Voltage converter - Google Patents
Voltage converter Download PDFInfo
- Publication number
- CN117977958B CN117977958B CN202410392924.4A CN202410392924A CN117977958B CN 117977958 B CN117977958 B CN 117977958B CN 202410392924 A CN202410392924 A CN 202410392924A CN 117977958 B CN117977958 B CN 117977958B
- Authority
- CN
- China
- Prior art keywords
- switching tube
- energy storage
- voltage
- controlling
- storage capacitor
- 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.)
- Active
Links
- 238000004146 energy storage Methods 0.000 claims abstract description 156
- 239000003990 capacitor Substances 0.000 claims abstract description 84
- 230000000087 stabilizing effect Effects 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 abstract description 18
- 238000010586 diagram Methods 0.000 description 20
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The application provides a voltage converter, and relates to the technical field of integrated circuits. The first voltage terminal may be connected in parallel with the first energy storage capacitor; the first energy storage capacitor, the source electrode of the first switching tube, the drain electrode of the first switching tube, the first energy storage inductor, the drain electrode of the second switching tube and the source electrode of the second switching tube are sequentially connected in series to form a loop; the second voltage end is connected with the second switch tube in parallel, in each preset period, the first switch tube can be controlled to be kept on, the second switch tube is controlled to be turned on or off for a first preset period by a control signal with a preset duty ratio, the first voltage end can charge the first energy storage capacitor and the first energy storage inductor, and the energy storage size of the first energy storage capacitor and the first energy storage inductor depends on the duty ratio of the control signal. And then controlling the second switch tube to be disconnected for a second preset time, and then releasing electric energy to the second voltage end by the first energy storage capacitor and the first energy storage inductor, so that the voltage of the second voltage end is different from that of the first voltage end, and the voltage conversion is completed.
Description
Technical Field
The present disclosure relates to integrated circuits, and particularly to a voltage converter.
Background
The voltage converter is characterized in that the characteristics of energy storage of a capacitor and an inductor are utilized, the high-frequency switching operation is performed through a controllable switching tube, the input electric energy is stored in the capacitor and the inductor, when the controllable switching tube is disconnected, the electric energy is released to the other end so as to provide energy for the other end, and the output power or voltage capacity of the voltage converter is related to the duty ratio of the controllable switching tube.
As shown in fig. 1, a current voltage converter has the following structure: the first voltage end V1, the second voltage end V2, the first switching tube Q1, the second switching tube Q2, the third switching tube Q3, the first energy storage capacitor C1 and the first energy storage inductor L1 are connected in parallel, the first energy storage capacitor C1, the first switching tube Q1, the first energy storage inductor L1 and the second switching tube Q2 are sequentially connected in series to form a loop, and the third switching tube Q3 is connected with a branch circuit of the second voltage end V2 in series and is connected with the second switching tube Q2 in parallel. The principle of the voltage converter converting voltage is as follows: in each period, the first switching tube Q1 is firstly controlled to be conducted, the third switching tube Q3 is firstly controlled to be disconnected, and the second switching tube Q2 is controlled to be switched on and off according to a control signal of a preset duty ratio, so that the first energy storage capacitor C1 and the first energy storage inductor L1 store electricity; and then the second switching tube Q2 is controlled to be disconnected, and the third switching tube Q3 is controlled to be switched on and off by a control signal with a preset duty ratio, so that the electric energy in the first energy storage capacitor C1 and the first energy storage inductor L1 is released to the second voltage end V2, and the voltage conversion is completed.
In the above process, the on-off states of the second switching tube Q2 and the third switching tube Q3 need to be continuously switched, so that the second switching tube Q2 and the third switching tube Q3 have larger loss, which results in low voltage conversion efficiency and insignificant voltage conversion effect.
Disclosure of Invention
The application provides a voltage converter which is used for solving the problems of low voltage conversion efficiency and insignificant voltage conversion effect caused by larger loss of a plurality of switching tubes because the on-off states of the switching tubes are required to be continuously switched in the prior art.
In a first aspect, the present application provides a voltage converter comprising: the first voltage end, the first switch tube, the first energy storage capacitor, the first energy storage inductor, the second switch tube and the second voltage end, wherein,
The first voltage end is connected with the first energy storage capacitor in parallel;
the first energy storage capacitor, the source electrode of the first switching tube, the drain electrode of the first switching tube, the first energy storage inductor, the drain electrode of the second switching tube and the source electrode of the second switching tube are sequentially connected in series to form a loop;
the second voltage terminal is connected in parallel with the second switching tube.
In one possible implementation manner, the voltage converter further comprises a second energy storage inductor, and the second energy storage inductor is respectively connected with the second switch tube and the second voltage end in parallel;
The voltage converter also comprises a central controller which is respectively and electrically connected with the grid electrode of the first switching tube and the grid electrode of the second switching tube,
The central controller is used for controlling the first switching tube to be kept on in each control period when receiving a forward boost command, controlling the second switching tube to be switched on and off for a first preset time period by a control signal higher than a preset duty ratio threshold value, and then controlling the second switching tube to be switched off for a second preset time period;
And/or the central controller is also used for controlling the first switching tube to be kept on in each control period when receiving the forward voltage reducing instruction, controlling the second switching tube to be switched on and off for a first preset time period by a control signal lower than a preset duty ratio threshold value, and then controlling the second switching tube to be switched off for a second preset time period.
In one possible embodiment, a first voltage stabilizing capacitor is further connected in series between the first energy storage inductor and the second energy storage inductor.
In one possible embodiment, the voltage converter further comprises a third switching tube, a second energy storage capacitor, a third energy storage inductance, a fourth switching tube, a first diode, and a second diode, wherein,
The second energy storage capacitor is connected with the second voltage end in parallel;
the second energy storage capacitor, the source electrode of the third switching tube, the drain electrode of the third switching tube, the third energy storage inductor, the drain electrode of the fourth switching tube and the source electrode of the fourth switching tube are sequentially connected in series to form a loop;
The first energy storage capacitor, the source electrode of the first switching tube, the drain electrode of the first switching tube, the first energy storage inductor, the second diode, the drain electrode of the third switching tube, the source electrode of the third switching tube and the second energy storage capacitor are sequentially connected in series to form a loop, and the third energy storage inductor is connected with a branch circuit of the fourth switching tube in series and is connected with the branch circuit of the third switching tube and the second energy storage capacitor in parallel;
The second energy storage capacitor, the source electrode of the third switching tube, the drain electrode of the third switching tube, the third energy storage inductor, the first diode, the drain electrode of the first switching tube, the source electrode of the first switching tube and the first energy storage capacitor are sequentially connected in series to form a loop.
In one possible embodiment, a first voltage stabilizing capacitor is connected in series between the first energy storage inductor and the input end of the second diode;
a second voltage stabilizing capacitor is connected in series between the third energy storage inductor and the input end of the first diode.
In one possible embodiment, the voltage converter further comprises a second energy storage inductance, which is connected in parallel to the second switching tube and the fourth switching tube, respectively.
In one possible embodiment, the voltage converter further comprises a central controller electrically connected to the gates of the first, second, third and fourth switching tubes, respectively, wherein,
The central controller is used for controlling the first switching tube, the third switching tube to be kept on, the fourth switching tube to be kept off and controlling the second switching tube to be turned on and off for a first preset time period by a control signal higher than a preset duty ratio threshold value in each control period when receiving the forward boost command, and then controlling the second switching tube to be turned off for a second preset time period;
And/or the central controller is also used for controlling the first switching tube, the third switching tube to be kept on and the fourth switching tube to be kept off in each control period when receiving the forward voltage reducing instruction, controlling the second switching tube to be switched on and switched off for a first preset time period by a control signal lower than a preset duty ratio threshold value, and then controlling the second switching tube to be switched off for a second preset time period.
In one possible implementation of the method according to the invention,
And/or, the central controller is further configured to, when receiving the reverse boost command, control the first switching tube, the third switching tube to remain on, the second switching tube to remain off, and control the fourth switching tube Guan Tongduan to be turned off for a first preset duration with a control signal higher than a preset duty cycle threshold value in each control period, and then control the fourth switching tube to be turned off for a second preset duration;
And/or, the central controller is further configured to, when receiving the reverse step-down instruction, control the first switching tube, the third switching tube to remain on, the second switching tube to remain off, and control the fourth switching tube Guan Tongduan to be turned off for a first preset duration with a control signal lower than a preset duty ratio threshold value in each control period, and then control the fourth switching tube to be turned off for a second preset duration.
In one possible implementation, the duty cycle threshold is 0.5.
According to the voltage converter provided by the application, as the first voltage end is connected with the first energy storage capacitor in parallel; the first energy storage capacitor, the source electrode of the first switching tube, the drain electrode of the first switching tube, the first energy storage inductor, the drain electrode of the second switching tube and the source electrode of the second switching tube are sequentially connected in series to form a loop; the second voltage terminal is connected in parallel with the second switching tube. In this way, in each preset period, the first switching tube can be controlled to be kept on at first, and the second switching tube is controlled to be turned on or off for a first preset period by a control signal with a preset duty ratio, so that the first voltage end can charge the first energy storage capacitor and the first energy storage inductor, and the energy storage size of the first energy storage capacitor and the first energy storage inductor depends on the duty ratio of the control signal. And then controlling the second switch tube to be disconnected for a second preset time, and then releasing electric energy to the second voltage end by the first energy storage capacitor and the first energy storage inductor, so that the voltage of the second voltage end is different from that of the first voltage end, and the voltage conversion is completed. It is understood that the voltage from the first voltage terminal to the second voltage terminal is boosted when the duty ratio of the control signal is higher than the set duty ratio threshold, and is stepped down when the duty ratio of the control signal is lower than the set duty ratio threshold. In the process, only the on-off state of the second switching tube is required to be controlled, so that the loss is reduced, the voltage conversion efficiency of the voltage converter is greatly improved, and the voltage conversion effect is obvious.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a circuit diagram of a prior art voltage converter;
FIG. 2 is a circuit diagram of a voltage converter according to an embodiment of the present application;
FIG. 3 is a second circuit diagram of a voltage converter according to an embodiment of the present application;
FIG. 4 is a third circuit diagram of a voltage converter according to an embodiment of the present application;
FIG. 5 is a circuit diagram of a voltage converter according to an embodiment of the present application;
Fig. 6 is a schematic diagram showing the relationship between the gain of the voltage converter of the prior art of fig. 1 and the gain of the voltage converter of the embodiment of the application corresponding to fig. 5 when the duty ratio of the control signal is different;
fig. 7 is a waveform diagram of voltage or current of each electronic component when the voltage converter is in a boost state according to the embodiment of the present application;
fig. 8 is a waveform diagram of voltage or current of each electronic component when the voltage converter is in a step-down state according to an embodiment of the present application.
Detailed Description
Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is only exemplary and is not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure.
Various structural schematic diagrams according to embodiments of the present disclosure are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and relative sizes, positional relationships between them shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
In the context of the present disclosure, when a layer/element is referred to as being "on" another layer/element, it can be directly on the other layer/element or intervening layers/elements may be present therebetween. In addition, if one layer/element is located "on" another layer/element in one orientation, that layer/element may be located "under" the other layer/element when the orientation is turned.
The following describes the technical scheme of the present application and how the technical scheme of the present application solves the above technical problems in detail with specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present application will be described below with reference to the accompanying drawings.
Referring to fig. 2, an embodiment of the present application provides a voltage converter, which includes a first voltage terminal V1, a first switching tube Q1, a first energy storage capacitor C1, a first energy storage inductor L1, a second switching tube Q2, and a second voltage terminal V2. The first voltage terminal V1 may be a first battery, and the second voltage terminal V2 may be a load or a second battery, which is not limited herein.
The first voltage end V1 is connected with the first energy storage capacitor C1 in parallel, and the first energy storage capacitor C1, the source electrode of the first switching tube Q1, the drain electrode of the first switching tube Q1, the first energy storage inductor L1, the drain electrode of the second switching tube Q2 and the source electrode of the second switching tube Q2 are sequentially connected in series to form a loop; the second voltage terminal V2 is connected in parallel with the second switching tube Q2.
Optionally, the voltage converter may further include a central controller electrically connected to the gate of the first switching tube Q1 and the gate of the second switching tube Q2, respectively, wherein,
The central controller is used for controlling the first switching tube Q1 to be kept on in each control period when receiving the forward boost command, controlling the second switching tube Q2 to be switched on and switched off for a first preset time period by a control signal higher than a preset duty ratio threshold value, and then controlling the second switching tube Q2 to be switched off for a second preset time period; and/or, the central controller is further configured to control, in each control period, the first switching tube Q1 to remain on, and control the second switching tube Q2 to be turned on and off for a first preset duration with a control signal lower than a preset duty ratio threshold value, and then control the second switching tube Q2 to be turned off for a second preset duration when the forward step-down command is received. Wherein the preset duty cycle threshold may be, but is not limited to, 0.5.
According to the voltage converter provided by the embodiment of the application, as the first voltage end V1 is connected with the first energy storage capacitor C1 in parallel; the first energy storage capacitor C1, the source electrode of the first switching tube Q1, the drain electrode of the first switching tube Q1, the first energy storage inductor L1, the drain electrode of the second switching tube Q2 and the source electrode of the second switching tube Q2 are sequentially connected in series to form a loop; the second voltage terminal V2 is connected in parallel with the second switching tube Q2. In this way, in each preset period, the first switching tube Q1 may be controlled to be turned on first, and the second switching tube Q2 is controlled to be turned on or off for a first preset period by a control signal with a preset duty ratio, so that the first voltage terminal V1 may charge the first energy storage capacitor C1 and the first energy storage inductor L1, where the energy storage magnitudes of the first energy storage capacitor C1 and the first energy storage inductor L1 depend on the duty ratio of the control signal. Then, the second switching tube Q2 is controlled to be disconnected for a second preset period of time, and at this time, the first energy storage capacitor C1 and the first energy storage inductor L1 release electric energy to the second voltage terminal V2, so that the voltage of the second voltage terminal V2 is different from the voltage of the first voltage terminal V1, and voltage conversion is completed. It will be appreciated that the voltages of the first voltage terminal V1 to the second voltage terminal V2 are boosted when the duty ratio of the control signal is higher than the set duty ratio threshold, and the voltages of the first voltage terminal V1 to the second voltage terminal V2 are stepped down when the duty ratio of the control signal is lower than the set duty ratio threshold. In the process, only the on-off state of the second switching tube Q2 is controlled, so that the loss is reduced, the voltage conversion efficiency of the voltage converter is greatly improved, and the voltage conversion effect is obvious. For example, in the boosting process, the gain of the voltage converter is improved, namely the boosting efficiency of the voltage converter is improved, and the boosting effect is obvious; for another example, during voltage reduction, the gain of the voltage converter is reduced, that is, the voltage reduction efficiency of the voltage converter is improved, and the voltage reduction effect is obvious.
Further, as shown in fig. 3, the voltage converter further includes a second energy storage inductor L2, where the second energy storage inductor L2 is connected in parallel with the second switching tube Q2 and the second voltage terminal V2, respectively. In this way, the first voltage terminal V1, the source of the first switching tube Q1, the drain of the first switching tube Q1, the first energy storage inductor L1, and the second switching tube Q2 are also sequentially connected in series to form a loop. When the first switching tube Q1 is controlled to be kept on and the second switching tube Q2 is controlled to be turned on and off by a control signal with a preset duty ratio, the first voltage terminal V1 can charge not only the first energy storage capacitor C1 and the first energy storage inductor L1 but also the second energy storage inductor L2. Therefore, after the second switching tube Q2 is controlled to be disconnected subsequently, not only the first energy storage capacitor C1 and the first energy storage inductor L1 can be discharged, but also the second energy storage inductor L2 can be discharged, and the voltage conversion efficiency of the voltage converter can be further improved.
Further, as shown in fig. 3, a first voltage stabilizing capacitor C11 is further connected in series between the first energy storage inductor L1 and the second energy storage inductor L2. It can be understood that the capacitance value of the first stabilizing capacitor C11 is smaller than the capacitance value of the first energy storage capacitor C1, and the first stabilizing capacitor C11 is used for stabilizing the voltage converted by the voltage converter.
In addition, in other embodiments, the first voltage terminal V1 is a first battery and the second voltage terminal V2 is a second battery. On the basis of the embodiment corresponding to fig. 2, as shown in fig. 4, the voltage converter may further include a third switching tube Q3, a second energy storage capacitor C2, a third energy storage inductor L3, a fourth switching tube Q4, a first diode D1, and a second diode D2, where the second energy storage capacitor C2 is connected in parallel with the second voltage terminal V2; the second energy storage capacitor C2, the source electrode of the third switching tube Q3, the drain electrode of the third switching tube Q3, the third energy storage inductor L3, the drain electrode of the fourth switching tube Q4 and the source electrode of the fourth switching tube Q4 are sequentially connected in series to form a loop; the first energy storage capacitor C1, the source electrode of the first switching tube Q1, the drain electrode of the first switching tube Q1, the first energy storage inductor L1, the second diode D2, the drain electrode of the third switching tube Q3, the source electrode of the third switching tube Q3 and the second energy storage capacitor C2 are sequentially connected in series to form a loop, and the third energy storage inductor L3 is connected with a branch circuit connected with the fourth switching tube Q4 in series and is connected with a branch circuit connected with the third switching tube Q3 and the second energy storage capacitor C2 in parallel; the second energy storage capacitor C2, the source electrode of the third switching tube Q3, the drain electrode of the third switching tube Q3, the third energy storage inductor L3, the first diode D1, the drain electrode of the first switching tube Q1, the source electrode of the first switching tube Q1 and the first energy storage capacitor C1 are sequentially connected in series to form a loop.
Optionally, the voltage converter further comprises a central controller electrically connected to the gate of the first switching tube Q1, the gate of the second switching tube Q2, the gate of the third switching tube Q3 and the gate of the fourth switching tube Q4, respectively,
The central controller is used for controlling the first switching tube Q1, the third switching tube Q3 to be kept on and the fourth switching tube Q4 to be kept off in each control period when receiving the forward boost command, and controlling the second switching tube Q2 to be switched on and switched off for a first preset time period by a control signal higher than a preset duty ratio threshold value. In this way, the first voltage terminal V1 may charge the first energy storage capacitor C1 and the first energy storage inductor L1, and then control the second switching tube Q2 to be disconnected for a second preset period of time, where the first energy storage capacitor C1 and the first energy storage inductor L1 may release electric energy to the second voltage terminal V2 through the second diode D2, and since the duty ratio of the control signal is higher than the preset duty ratio threshold (may be but not limited to 0.5), the voltage of the second voltage terminal V2 is higher than the voltage of the first voltage terminal V1, so as to complete the forward boost of the voltage.
And/or, in other embodiments, the central controller is further configured to control, in each control period, the first switching tube Q1, the third switching tube Q3 to remain on, the fourth switching tube Q4 to remain off, and control the second switching tube Q2 to be turned on or off for a first preset period of time by a control signal that is lower than a preset duty cycle threshold when the forward step-down command is received. In this way, the first voltage terminal V1 may charge the first energy storage capacitor C1 and the first energy storage inductor L1, and then control the second switching tube Q2 to disconnect for a second preset period of time, at this time, the first energy storage capacitor C1 and the first energy storage inductor L1 release electric energy to the second voltage terminal V2 through the second diode D2, and since the duty ratio of the control signal is lower than the preset duty ratio threshold, the voltage of the second voltage terminal V2 is lower than the voltage of the first voltage terminal V1, so as to complete the forward voltage reduction of the voltage.
And/or, in other embodiments, the central controller is further configured to, when receiving the reverse boost command, control, in each control period, the first switching tube Q1, the third switching tube Q3 to remain on, the second switching tube Q2 to remain off, and control the fourth switching tube Q4 to be turned on or off for a first preset period of time by a control signal higher than a preset duty cycle threshold, so that the second voltage terminal V2 can charge the second energy storage capacitor C2 and the third energy storage inductor L3, and then control the fourth switching tube Q4 to be turned off for a second preset period of time. At this time, the second energy storage capacitor C2 and the third energy storage inductor L3 release electric energy to the first voltage terminal V1 through the first diode D1, and since the duty ratio of the control signal is higher than the preset duty ratio threshold, the voltage of the first voltage terminal V1 is higher than the voltage of the second voltage terminal V2, so as to complete the reverse boosting of the voltage.
And/or, in other embodiments, the central controller is further configured to control, in each control period when receiving the reverse step-down instruction, the first switching tube Q1 and the third switching tube Q3 to remain on, the second switching tube Q2 to remain off, and control the fourth switching tube Q4 to be turned on and off for a first preset period by a control signal lower than a preset duty cycle threshold, so that the second voltage terminal V2 can charge the second energy storage capacitor C2 and the third energy storage inductor L3;
And then controlling the fourth switching tube Q4 to be disconnected for a second preset time period. At this time, the second energy storage capacitor C2 and the third energy storage inductor L3 release electric energy to the first voltage terminal V1 through the first diode D1, and the voltage of the first voltage terminal V1 is lower than the voltage of the second voltage terminal V2 due to the fact that the duty ratio of the control signal is lower than the preset duty ratio threshold value, so that the reverse voltage reduction of the voltage is completed.
It can be understood that the voltage converter according to fig. 4 has voltage conversion functions of forward boost, forward buck, reverse boost, and reverse buck, that is, the voltage converter has voltage conversion functions of bidirectional boost and buck.
On the basis of the embodiment corresponding to fig. 4, as shown in fig. 5, the voltage converter further includes a second energy storage inductor L2, where the second energy storage inductor L2 is connected in parallel with the second switching tube Q2 and the fourth switching tube Q4 respectively. Similarly, during forward boost or forward buck, the first voltage terminal V1 may charge not only the first energy storage capacitor C1 and the first energy storage inductor L1, but also the second energy storage inductor L2. Therefore, after the second switching tube Q2 is controlled to be disconnected subsequently, not only the first energy storage capacitor C1 and the first energy storage inductor L1 can be discharged, but also the second energy storage inductor L2 can be discharged, so that the voltage conversion efficiency of the voltage converter can be further improved; when the voltage is reversely increased or decreased, the second voltage end V2 not only can charge the second energy storage capacitor C2 and the third energy storage inductor L3, but also can charge the second energy storage inductor L2, so that after the fourth switching tube Q4 is subsequently controlled to be disconnected, not only the second energy storage capacitor C2 and the third energy storage inductor L3 can be discharged, but also the second energy storage inductor L2 can be discharged, and the voltage conversion efficiency of the voltage converter can be further improved.
On the basis of the embodiment corresponding to fig. 4, as shown in fig. 5, a first voltage stabilizing capacitor C11 is connected in series between the first energy storage inductor L1 and the input end of the second diode D2, and a second voltage stabilizing capacitor C12 is connected in series between the third energy storage inductor L3 and the input end of the first diode D1. The first voltage stabilizing capacitor C11 and the second voltage stabilizing capacitor C12 are used for stabilizing the voltage converted by the voltage converter.
Based on the corresponding embodiment of fig. 5, the gain of the voltage converter can be deduced by the following equation，/>，/>It can be deduced/>Wherein D is the duty cycle of the control signal,/>For the voltage at the voltage terminal before conversion,/>For the voltage of the converted voltage terminal,/>Is the voltage of the first voltage stabilizing capacitor C11 or the voltage of the second voltage stabilizing capacitor C12,/>Is the gain.
The gain of the voltage converter of FIG. 1 corresponding to the prior art isAs can be appreciated, due toIt can be derived/>The embodiment of the application provides a voltage converter with higher gain.
Further, as shown in the following table 1, the inventors have found out a mapping table of the gain of the prior art voltage converter of fig. 1 and the gain of the voltage converter according to the embodiment of fig. 5 of the present application when the duty ratio of the control signal is different.
Table 1 mapping table of gains of voltage converters
Fig. 6 is a schematic diagram showing the relationship between the gain of the voltage converter of the prior art of fig. 1 and the gain of the voltage converter of the embodiment of the application corresponding to fig. 5 when the duty ratio of the control signal is different. As can be seen from fig. 6, when the duty ratio is greater than 0.5, the voltage converter is in a boost state, and the gain of the voltage converter according to the embodiment of fig. 5 of the present application is higher than that of the voltage converter of the prior art of fig. 1, so that the boost efficiency of the voltage converter is improved; when the duty cycle is less than 0.5, the voltage converter is in a step-down state, and the gain of the voltage converter according to the embodiment of fig. 5 of the present application is lower than that of the voltage converter of the prior art of fig. 1, so that the step-down efficiency of the voltage converter is improved.
On the basis of the voltage converter of the embodiment corresponding to fig. 5, fig. 7 (a) is a voltage waveform diagram of the output voltage after the voltage converter is boosted when the voltage converter is in the boosted state; fig. 7 (b) is a current waveform diagram of the output of the voltage converter after being boosted when the voltage converter is in a boosted state; fig. 7 (c) is a current waveform diagram of the current flowing through the first energy storage inductor L1 when the voltage converter is in the boost state; fig. 7 (d) is a current waveform diagram of the current flowing through the second energy storage inductor L2 when the voltage converter is in the boost state; fig. 7 (e) is a current waveform diagram of the current flowing through the third energy storage inductor L3 when the voltage converter is in the boost state.
Fig. 8 (a) is a voltage waveform diagram of the output voltage after the voltage converter is stepped down when the voltage converter is in a step-down state; fig. 8 (b) is a voltage waveform diagram of the output current after the voltage converter is stepped down when the voltage converter is in a step-down state; fig. 8 (c) is a current waveform diagram of the current flowing through the first energy storage inductor L1 when the voltage converter is in the step-down state; fig. 8 (d) is a current waveform diagram of the current flowing through the second energy storage inductor L2 when the voltage converter is in the step-down state; fig. 8 (e) is a current waveform diagram of the current flowing through the third energy storage inductor L3 when the voltage converter is in the step-down state.
In the above description, technical details such as patterning of each layer are not described in detail. Those skilled in the art will appreciate that layers, regions, etc. of the desired shape may be formed by a variety of techniques. In addition, to form the same structure, those skilled in the art can also devise methods that are not exactly the same as those described above. In addition, although the embodiments are described above separately, this does not mean that the measures in the embodiments cannot be used advantageously in combination.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. A voltage converter, comprising: the first voltage end, the first switch tube, the first energy storage capacitor, the first energy storage inductor, the second switch tube and the second voltage end, wherein,
The first voltage end is connected with the first energy storage capacitor in parallel;
The first energy storage capacitor, the source electrode of the first switching tube, the drain electrode of the first switching tube, the first energy storage inductor, the drain electrode of the second switching tube and the source electrode of the second switching tube are sequentially connected in series to form a loop;
the second voltage end is connected with the second switching tube in parallel;
the voltage converter also comprises a central controller which is respectively and electrically connected with the grid electrode of the first switching tube and the grid electrode of the second switching tube,
The central controller is used for controlling the first switching tube to be kept on in each control period when receiving a forward boost command, controlling the second switching tube to be switched on and off for a first preset time period by a control signal higher than a preset duty ratio threshold value, and then controlling the second switching tube to be switched off for a second preset time period;
and/or the central controller is further used for controlling the first switching tube to be kept on in each control period when receiving a forward voltage reducing instruction, controlling the second switching tube to be switched on and off for a first preset duration by a control signal lower than a preset duty ratio threshold value, and then controlling the second switching tube to be switched off for a second preset duration;
the voltage converter further comprises a second energy storage inductor which is respectively connected with the second switching tube and the second voltage end in parallel;
a first voltage stabilizing capacitor is connected in series between the first energy storage inductor and the second energy storage inductor;
the voltage converter further comprises a third switch tube, a second energy storage capacitor, a third energy storage inductor, a fourth switch tube, a first diode and a second diode, wherein,
The second energy storage capacitor is connected with the second voltage end in parallel;
The second energy storage capacitor, the source electrode of the third switching tube, the drain electrode of the third switching tube, the third energy storage inductor, the drain electrode of the fourth switching tube and the source electrode of the fourth switching tube are sequentially connected in series to form a loop;
The first energy storage capacitor, the source electrode of the first switching tube, the drain electrode of the first switching tube, the first energy storage inductor, the second diode, the drain electrode of the third switching tube, the source electrode of the third switching tube and the second energy storage capacitor are sequentially connected in series to form a loop, and the third energy storage inductor is connected with a branch connected with the fourth switching tube in series and is connected with the branch connected with the third switching tube and the second energy storage capacitor in parallel;
The second energy storage capacitor, the source electrode of the third switching tube, the drain electrode of the third switching tube, the third energy storage inductor, the first diode, the drain electrode of the first switching tube, the source electrode of the first switching tube and the first energy storage capacitor are sequentially connected in series to form a loop.
2. The voltage converter of claim 1, wherein a first voltage stabilizing capacitor is connected in series between the first energy storage inductor and the input end of the second diode;
A second voltage stabilizing capacitor is connected in series between the third energy storage inductor and the input end of the first diode.
3. The voltage converter of claim 1, further comprising a second energy storage inductance connected in parallel with the second switching tube and the fourth switching tube, respectively.
4. The voltage converter of claim 1, further comprising a central controller electrically connected to the gates of the first, second, third, and fourth switching tubes, respectively, wherein,
The central controller is used for controlling the first switching tube, the third switching tube to be kept on, the fourth switching tube to be kept off and controlling the second switching tube to be switched on and off for a first preset time period by a control signal higher than a preset duty ratio threshold value in each control period when receiving a forward boost command, and then controlling the second switching tube to be switched off for a second preset time period;
And/or the central controller is further used for controlling the first switching tube, the third switching tube to be kept on, the fourth switching tube to be kept off and controlling the second switching tube to be switched on and off for a first preset time period by a control signal lower than a preset duty ratio threshold value in each control period when the forward voltage reducing instruction is received, and then controlling the second switching tube to be switched off for a second preset time period.
5. The voltage converter according to claim 4, wherein,
And/or the central controller is further used for controlling the first switching tube, the third switching tube to be kept on, the second switching tube to be kept off and the fourth switching tube to be switched on and off for a first preset time period by a control signal higher than a preset duty ratio threshold value in each control period when receiving a reverse boosting instruction, and then controlling the fourth switching tube to be switched off for a second preset time period;
And/or the central controller is further used for controlling the first switching tube, the third switching tube to be kept on, the second switching tube to be kept off and controlling the fourth switching tube to be switched on and off for a first preset time period by a control signal lower than a preset duty ratio threshold value in each control period when receiving a reverse voltage reducing instruction, and then controlling the fourth switching tube to be switched off for a second preset time period.
6. The voltage converter according to claim 4 or 5, wherein,
The duty cycle threshold is 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410392924.4A CN117977958B (en) | 2024-04-02 | 2024-04-02 | Voltage converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410392924.4A CN117977958B (en) | 2024-04-02 | 2024-04-02 | Voltage converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117977958A CN117977958A (en) | 2024-05-03 |
| CN117977958B true CN117977958B (en) | 2024-06-07 |
Family
ID=90849995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410392924.4A Active CN117977958B (en) | 2024-04-02 | 2024-04-02 | Voltage converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117977958B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003047238A (en) * | 2001-04-17 | 2003-02-14 | Matsushita Electric Ind Co Ltd | Battery-driven electronic apparatus and mobile communication apparatus |
| CN103337957A (en) * | 2013-07-04 | 2013-10-02 | 南京集能易新能源技术有限公司 | Low-ripple four-switch buck-boost direct-current converter and control method thereof |
| CN103633842A (en) * | 2013-11-14 | 2014-03-12 | 华南理工大学 | Single-switch inverted output quadratic wide gain converter |
| CN113364291A (en) * | 2021-05-06 | 2021-09-07 | 深圳第三代半导体研究院 | Two-mode control method and system for bidirectional reversible direct current converter |
| CN114499185A (en) * | 2021-12-29 | 2022-05-13 | 深圳供电局有限公司 | Voltage converter, control method and device thereof and voltage conversion equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT516214B1 (en) * | 2014-09-10 | 2020-09-15 | Fronius Int Gmbh | DC / DC converter |
-
2024
- 2024-04-02 CN CN202410392924.4A patent/CN117977958B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003047238A (en) * | 2001-04-17 | 2003-02-14 | Matsushita Electric Ind Co Ltd | Battery-driven electronic apparatus and mobile communication apparatus |
| CN103337957A (en) * | 2013-07-04 | 2013-10-02 | 南京集能易新能源技术有限公司 | Low-ripple four-switch buck-boost direct-current converter and control method thereof |
| CN103633842A (en) * | 2013-11-14 | 2014-03-12 | 华南理工大学 | Single-switch inverted output quadratic wide gain converter |
| CN113364291A (en) * | 2021-05-06 | 2021-09-07 | 深圳第三代半导体研究院 | Two-mode control method and system for bidirectional reversible direct current converter |
| CN114499185A (en) * | 2021-12-29 | 2022-05-13 | 深圳供电局有限公司 | Voltage converter, control method and device thereof and voltage conversion equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117977958A (en) | 2024-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105958823B (en) | A kind of quasi- Z source converter circuit of electric current continuous type high-gain boost switching | |
| CN204633600U (en) | A kind of novel crisscross parallel topology structure of stepping-up/stepping-down chopper circuit | |
| CN105939112B (en) | A kind of quasi- boost switching DC-DC converter of high-gain | |
| CN103391001B (en) | For the high-gain DC/DC converter of MPPT link of photovoltaic inverter | |
| CN203243222U (en) | High-gain converter containing voltage multiplying unit and improved interleaved Boost | |
| CN103746554A (en) | High step-up-ratio converter in bidirectional voltage outputting for photovoltaic module | |
| CN112713766B (en) | High-gain Cuk DC-DC converter | |
| CN110994992A (en) | Expandable gain unit type high-capacity DC/DC converter | |
| US20170170739A1 (en) | Solar power converter with isolated bipolar full-bridge resonant circuit | |
| CN112701923A (en) | Novel high-gain Zeta DC-DC converter | |
| CN109309448B (en) | Wide-input wide-output Cuk DC-DC converter | |
| CN104319798A (en) | Bidirectional DCDC converter and optical storage system | |
| CN117977958B (en) | Voltage converter | |
| KR101412352B1 (en) | Dc-dc convert | |
| CN105978322B (en) | A kind of quasi- sources Z DC-DC converter of switching capacity type high-gain | |
| CN110912407B (en) | Wide-range high-frequency direct current conversion device | |
| CN116073653B (en) | Non-isolated direct current converter suitable for low-voltage photovoltaic | |
| CN103746556A (en) | High step-up ratio converter for DC (Direct Current) module on basis of coupled inductors | |
| CN109274267B (en) | Novel extensible Zeta DC-DC converter | |
| CN106712504B (en) | Non-isolated high-gain DC/DC converter with soft switch | |
| CN113676047A (en) | Expandable switch capacitor bidirectional DC-DC converter and control method | |
| TWI568156B (en) | Step down dc converter | |
| CN109728725B (en) | Bidirectional high-gain Cuk circuit with tap inductor | |
| CN209748408U (en) | power supply boosting device based on multi-stage energy storage unit series connection | |
| TWI625922B (en) | Wide-range voltage conversion ratios dc-dc converter |
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 | ||
| GR01 | Patent grant |