CN217335438U - High-output-current DC/DC converter - Google Patents
High-output-current DC/DC converter Download PDFInfo
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- CN217335438U CN217335438U CN202123260300.8U CN202123260300U CN217335438U CN 217335438 U CN217335438 U CN 217335438U CN 202123260300 U CN202123260300 U CN 202123260300U CN 217335438 U CN217335438 U CN 217335438U
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- 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
A high-output current DC/DC converter comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a first inductor, a second inductor, a third inductor, a first capacitor, a second capacitor, a third capacitor, a first resistor and a first direct current source; the first inductor and the second inductor form a double-winding coupling inductor, the first inductor is a primary winding, and the second inductor is a secondary winding; when the first switch tube, the third switch tube and the fifth switch tube are all switched on and the second switch tube, the fourth switch tube and the sixth switch tube are all switched off; the first direct current source charges the first capacitor through the first switching tube to supply power to the load resistor, the first inductor supplies power to the load resistor through the fifth switching tube, and the second capacitor supplies power to the load resistor through the third switching tube and the fifth switching tube; the novel inductive coupling structure realizes high power density, reduces current ripples and improves the efficiency of a circuit; convenient to realize, simple structure, reduce cost.
Description
Technical Field
The utility model belongs to the technical field of direct current power supply, concretely relates to high output current DC/DC converter.
Background
With the continuous development of power electronic technology and the appearance of novel high-voltage-resistant power devices, DC/DC power supplies with high power density have been widely applied to the fields of military, medical treatment, communication and the like. Therefore, it is often necessary to implement the application of the DC power supply in the above-mentioned field by a DC/DC converter with high output current. The existing DC/DC converter with high output current has the following defects: 1) the power density is low; 2) the number of power devices is large; 3) the high output current increases the circuit loss; 4) the single inductor makes the current ripple large. Therefore, in recent years, researchers at home and abroad have been working on new structures capable of realizing high power density, high output current, and high efficiency.
Disclosure of Invention
For overcoming the not enough of above-mentioned prior art, the utility model aims to provide a high output current DC converter solves current high output current DC converter power density low, power device is huge in quantity, high output current makes circuit loss increase and single inductance make the technical problem that the electric current ripple is big, has the technical maturity, is convenient for realize, simple structure, low-cost advantage.
In order to achieve the above object, the utility model adopts the following technical scheme:
a high-output current DC/DC converter is characterized in that a first direct current source anode, a first switch tube drain electrode and a second switch tube drain electrode are connected, a first switch tube source electrode, a first capacitor anode and a fourth switch tube drain electrode are connected, a second switch tube source electrode, a second capacitor anode and a third switch tube drain electrode are connected, a fourth switch tube source electrode, a second capacitor cathode, one end of a first inductor and a fifth switch tube drain electrode are connected, a third switch tube source electrode, a first capacitor cathode, one end of a second inductor and a sixth switch tube drain electrode are connected, the other end of the first inductor, the other end of the second inductor and one end of a third inductor are connected, the other end of the third inductor, the third capacitor anode and one end of a first resistor are connected, and a first direct current source cathode, the fifth switch tube source electrode, the third capacitor cathode, the other end of the first resistor and the sixth switch tube source electrode are connected.
The first direct current source voltage value is 48V.
The first switch tube, the second switch tube, the third switch tube and the fourth switch tube are all MOSFET switch tubes with the model number of BSC052N08NS5, and the fifth switch tube and the sixth switch tube are all MOSFET switch tubes with the model number of BSC037N08NS 5.
The inductance values of the first inductor and the second inductor are 16.5uH, and the inductance values of the third inductor are both 3.3 uH.
The first capacitor, the second capacitor have a capacity of 10uF, and the third capacitor has a capacity of 100 uF.
The high output current DC/DC converter further comprises a voltage sensor, a DSP chip, a PWM controller and the DC/DC conversion circuit of claim 1; the voltage sensor measuring end is connected with two ends of the first resistor, the output ends of the voltage sensor measuring end are sequentially connected with the DSP chip and the PWM controller, and six output ends are arranged on the PWM controller and are respectively connected with the grid electrode of the first switch tube, the grid electrode of the second switch tube, the grid electrode of the third switch tube, the grid electrode of the fourth switch tube, the grid electrode of the fifth switch tube and the grid electrode of the sixth switch tube.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model comprises a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a first inductor, a second inductor, a third inductor, a first capacitor, a second capacitor, a third capacitor, a first resistor and a first direct current source; the first inductor and the second inductor form a double-winding coupling inductor, the first inductor is a primary winding, and the second inductor is a secondary winding; the first direct current source anode, the first switch tube drain electrode and the second switch tube drain electrode are connected, the first switch tube source electrode, the first capacitor anode and the fourth switch tube drain electrode are connected, the second switch tube source electrode, the second capacitor anode and the third switch tube drain electrode are connected, the fourth switch tube source electrode, the second capacitor cathode, one end of the first inductor and the fifth switch tube drain electrode are connected, the third switch tube source electrode, the first capacitor cathode, one end of the second inductor and the sixth switch tube drain electrode are connected, the other end of the first inductor, the other end of the second inductor and one end of the third inductor are connected, the other end of the third inductor, the third capacitor anode and one end of the first resistor are connected, and the first direct current source cathode, the fifth switch tube source electrode, the third capacitor cathode, the other end of the first resistor and the sixth switch tube source electrode are connected. And through the novel inductive coupling structure, the number of power devices is reduced, high power density is realized, current ripples are reduced, and the efficiency of the circuit is improved. And the control of a switching tube in the DC/DC conversion circuit is realized through the DSP chip and the PWM controller, the technology is mature, the realization is convenient, the structure is simple, and the cost is reduced.
Drawings
Fig. 1 is a circuit topology diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of a first operating state according to an embodiment of the present invention.
Fig. 3 is a schematic view of a second operating state according to the embodiment of the present invention.
In the figure: v in Is a direct current source; s 1 、S 2 、S 3 、S 4 、S 5 And S 6 Is a switch tube; c 1 、C 2 And C 3 Is a capacitor; l is 1 、L 2 And L 3 Is an inductor; r 1 Is a resistance. Where "+" indicates a positive reference direction for the positive pole of the capacitor and "-" indicates a negative reference direction for the negative pole of the capacitor. "." represents the dotted terminals of the coupled inductor.
Detailed Description
The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the drawings in the embodiment of the present invention.
Referring to fig. 1, the present invention relates to a high output current DC/DC converter, which comprises a first switch tube S 1 A second switch tube S 2 A third switch tube S 3 And a fourth switching tube S 4 The fifth switch tube S 5 The sixth switching tube S 6 A first inductor L 1 A second inductor L 2 A third inductor L 3 A first capacitor C 1 A second capacitor C 2 A third capacitor C 3 A first resistor R 1 And a first DC source V in (ii) a Wherein, the first inductance L 1 A second inductor L 2 Form a double-winding coupled inductor, a first inductor L 1 Is a primary winding, a second inductor L 2 Is a secondary winding; a first DC source V in Positive electrode of (1), first switch tube S 1 Drain electrode of the first switching tube S 2 The drain electrodes of the first and second transistors are connected; first switch tube S 1 Source electrode, first capacitor C 1 Positive electrode, fourth switch tube S 4 The drain electrodes of the first and second transistors are connected; a second switch tube S 2 Source electrode of the first capacitor C 2 Positive electrode of (2), third switching tube S 3 The drain electrodes of the first and second transistors are connected; fourth switch tube S 4 Source electrode of the first capacitor C 2 Negative pole of (1), first inductance L 1 One end of (1), a fifth switch tube S 5 The drain electrodes of the first and second transistors are connected; third switch tube S 3 Source electrode, first capacitor C 1 Negative pole of (1), second inductance L 2 One end of (1), a sixth switching tube S 6 The drain electrodes of the first and second transistors are connected; first inductance L 1 Another end of (1), a second inductance L 2 Another end of (1), a third inductance L 3 One end of the two ends are connected; third inductance L 3 The other end of (C), a third capacitor C 3 Positive electrode of (1)A resistor R 1 One end of the two ends are connected; a first DC source V in Negative electrode of (1), fifth switching tube S 5 Source electrode of, and third capacitor C 3 Negative electrode of (2), first resistor R 1 The other end of the first switch tube S 6 Is connected to the source of the transistor.
Wherein the first DC source V in The voltage value is 48V; first switch tube S 1 A second switch tube S 2 A third switch tube S 3 The fourth switch tube S 4 MOSFET switching tubes with the model number of BSC052N08NS5 and a fifth switching tube S are adopted 5 The sixth switching tube S 6 MOSFET switching tubes with the models of BSC037N08NS5 are adopted; first inductance L 1 And a second inductance L 2 Inductance of 16.5uH, third inductance L 3 The inductance values are all 3.3 uH; a first capacitor C 1 A second capacitor C 2 Capacity 10uF, third capacitance C 3 The capacity is 100 uF.
Specifically, in this embodiment, a specific connection relationship between the devices is given in fig. 1.
The principle and working process of the present invention are described as follows:
the utility model relates to a high output current DC/DC converter divide into following two kinds of mode.
A first mode of operation: referring to fig. 2, a first switching tube S 1 A third switch tube S 3 And a fifth switching tube S 5 Are all conducted, the second switch tube S 2 And a fourth switching tube S 4 And a sixth switching tube S 6 Are all turned off. A first DC source V in Through a first switch tube S 1 For the first capacitor C 1 Charging is carried out while applying a load resistance R 1 Power is supplied, at this time, the first inductor L 1 Due to the coupling effect via the fifth switching tube S 5 To the load resistance R 1 For power supply, a second capacitor C 2 Through a third switch tube S 3 And a fifth switching tube S 5 To the load resistance R 1 And supplying power.
A second mode of operation: referring to fig. 3, the first switching tube S 1 A third switch tube S 3 And a fifth switching tube S 5 Are all turned off, the second switch tube S 2 And a fourth switching tube S 4 And a sixth switching tube S 6 Are all turned on. A first DC source V in Through a second switch tube S 2 To the second capacitance C 2 Charging is carried out while applying a load resistance R 1 Power is supplied, at this time, the second inductor L 2 Due to the coupling effect via a sixth switching tube S 6 To the load resistance R 1 For power supply, a first capacitor C 1 Through a fourth switching tube S 4 And a sixth switching tube S 6 To the load resistance R 1 And supplying power.
The utility model also discloses a high output current DC/DC converter, which comprises a voltage sensor, a DSP chip, a PWM controller and the DC/DC conversion circuit of claim 1; the measuring end of the voltage sensor is connected with the first resistor R 1 Two ends and output ends are sequentially connected with the DSP chip and the PWM controller, six output ends are arranged on the PWM controller and are respectively connected with the first switch tube S 1 Grid electrode of the first switch tube S 2 Grid and third switch tube S 3 Grid and fourth switching tube S 4 Grid and a fifth switching tube S 5 Grid of (2) and sixth switching tube S 6 A gate electrode of (1).
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (6)
1. A high-output current DC/DC converter is characterized by comprising a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, a sixth switch tube, a first inductor, a second inductor, a third inductor, a first capacitor, a second capacitor, a third capacitor, a first resistor and a first direct current source; the first inductor and the second inductor form a double-winding coupling inductor; the first inductor is a primary winding, and the second inductor is a secondary winding; the positive electrode of the first direct current source, the drain electrode of the first switch tube and the drain electrode of the second switch tube are connected; the source electrode of the first switch tube is connected with the positive electrode of the first capacitor and the drain electrode of the fourth switch tube; the source electrode of the second switching tube, the anode of the second capacitor and the drain electrode of the third switching tube are connected; the source electrode of the fourth switching tube, the cathode of the second capacitor, one end of the first inductor and the drain electrode of the fifth switching tube are connected; the source electrode of the third switching tube, the cathode of the first capacitor, one end of the second inductor and the drain electrode of the sixth switching tube are connected; the other end of the first inductor, the other end of the second inductor and one end of the third inductor are connected; the other end of the third inductor, the anode of the third capacitor and one end of the first resistor are connected; the negative electrode of the first direct current source, the source electrode of the fifth switch tube, the negative electrode of the third capacitor, the other end of the first resistor and the source electrode of the sixth switch tube are connected.
2. A high output current DC/DC converter according to claim 1, wherein the first DC source voltage has a value of 48V.
3. The high-output-current DC/DC converter according to claim 1, wherein the first switch tube, the second switch tube, the third switch tube and the fourth switch tube are MOSFET switch tubes with model number BSC052N08NS5, and the fifth switch tube and the sixth switch tube are MOSFET switch tubes with model number BSC037N08NS 5.
4. The high output current DC/DC converter according to claim 1, wherein the first inductor and the second inductor have an inductance of 16.5uH and the third inductor has an inductance of 3.3 uH.
5. A high output current DC/DC converter according to claim 1, wherein the first capacitor, the second capacitor have a capacity of 10uF, and the third capacitor has a capacity of 100 uF.
6. The high-output-current DC/DC converter according to claim 1, further comprising a voltage sensor, a DSP chip, a PWM controller;
the measuring end of the voltage sensor is connected with the two ends of the first resistor, and the output end of the voltage sensor is sequentially connected with the DSP chip and the PWM controller; the PWM controller is provided with six output ends which are respectively connected with the grid electrode of the first switch tube, the grid electrode of the second switch tube, the grid electrode of the third switch tube, the grid electrode of the fourth switch tube, the grid electrode of the fifth switch tube and the grid electrode of the sixth switch tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123260300.8U CN217335438U (en) | 2021-12-23 | 2021-12-23 | High-output-current DC/DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123260300.8U CN217335438U (en) | 2021-12-23 | 2021-12-23 | High-output-current DC/DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217335438U true CN217335438U (en) | 2022-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123260300.8U Active CN217335438U (en) | 2021-12-23 | 2021-12-23 | High-output-current DC/DC converter |
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| Country | Link |
|---|---|
| CN (1) | CN217335438U (en) |
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2021
- 2021-12-23 CN CN202123260300.8U patent/CN217335438U/en active Active
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