CN203251225U - Bi-directional Buck converter - Google Patents
Bi-directional Buck converter Download PDFInfo
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- CN203251225U CN203251225U CN 201320297006 CN201320297006U CN203251225U CN 203251225 U CN203251225 U CN 203251225U CN 201320297006 CN201320297006 CN 201320297006 CN 201320297006 U CN201320297006 U CN 201320297006U CN 203251225 U CN203251225 U CN 203251225U
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- Prior art keywords
- buck converter
- inductance
- sustained diode
- power tube
- circuit
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Abstract
The utility model provides a bi-directional Buck converter which comprises a forward-directional BUCK converter and a backward-directional BUCK converter. The forward-directional BUCK converter is in opposite series connection with the backward-directional BUCK converter, and the forward-directional BUCK converter and the backward-directional BUCK converter share the same inductor L. The forward-directional BUCK converter is combined with and shares the same inductor with the backward-directional BUCK converter, so the bi-directional BUCK converter is advantaged by simple structure and low cost.
Description
Technical field
The utility model belongs to the design of electronic circuits technical field, is specifically related to a kind of Bi-directional Buck converter.
Background technology
The Buck converter be a kind of relatively simple for structure, use very widely DC/DC buck converter, especially be widely used in high-power voltage conversion occasion.
Along with the extensive use of power electronic equipment, in the delivery of electrical energy process, have the application scenario of a large amount of energy in bidirectional flows, such as: solar photovoltaic generation system, electric vehicle energy management system, communication with standby power system etc.Therefore, by the Buck converter is improved, in the technology Bi-directional Buck converter has appearred again now.
But existing Bi-directional Buck converter uses a large amount of electronic devices, has the high deficiency of complex structure and cost.
The utility model content
For the defective that prior art exists, the utility model provides a kind of Bi-directional Buck converter, has simple in structure and the low advantage of cost.
The technical solution adopted in the utility model is as follows:
The utility model provides a kind of two-way BUCK converter, comprises forward BUCK converter and negative sense BUCK converter; Described forward BUCK converter and described negative sense BUCK converter differential concatenation; Described forward BUCK converter and described negative sense BUCK converter share identical inductances L.
Preferably, described two-way BUCK converter comprises the first power supply and second source; Described the first positive source is connected with described second source positive pole and forms anodal circuit, and described the first power cathode is connected with described second source negative pole and forms the negative pole circuit; Described inductance L is connected on described anodal circuit; Or described inductance L is connected on described negative pole circuit; Or described inductance L is split as the first inductance L 1 and the second inductance L 2, and described the first inductance L 1 is connected on described anodal circuit, and described the second inductance L 2 is connected on described negative pole circuit.
Preferably, described forward BUCK converter is comprised of the first capacitor C 1, the first power tube Q1, the first sustained diode 1 and described inductance L; Described the first capacitor C 1 is connected in parallel on the two ends of described the first power supply; Be connected in parallel on the two ends of described the first capacitor C 1 after described the first power tube Q1 and 1 series connection of described the first sustained diode; Wherein, the negative electrode of described the first sustained diode 1 and described anodal connection, tie point is P1; The anode of described the first sustained diode 1 and described negative pole connection, tie point is P2;
Described negative sense BUCK converter is comprised of the second capacitor C 2, the second power tube Q2, the second sustained diode 2 and described inductance L; Described the second capacitor C 2 is connected in parallel on the two ends of described second source; Be connected in parallel on the two ends of described the second capacitor C 2 after described the second power tube Q2 and 2 series connection of described the second sustained diode; Wherein, the negative electrode of described the second sustained diode 2 and described anodal connection, tie point is P3; The anode of described the second sustained diode 2 and described negative pole connection, tie point is P4;
Described inductance L is connected on the circuit P1P3; Perhaps, described inductance L is connected on the circuit P2P4; Perhaps described the first inductance L 1 is connected on the circuit P1P3, and described the second inductance L 2 is connected on the circuit P2P4.
Preferably, described the first power tube Q1 and described the first sustained diode 1 series system are: the negative electrode series connection of the anode of described the first power tube Q1 and described the first sustained diode 1.
Preferably, described the first power tube Q1 and described the first sustained diode 1 series system are: the anode series connection of the negative electrode of described the first power tube Q1 and described the first sustained diode 1.
Preferably, described the second power tube Q2 and described the second sustained diode 2 series systems are: the negative electrode series connection of the anode of described the second power tube Q2 and described the second sustained diode 2.
Preferably, described the second power tube Q2 and described the second sustained diode 2 series systems are: the anode series connection of the negative electrode of described the second power tube Q2 and described the second sustained diode 2.
The beneficial effects of the utility model are as follows:
The utility model provides a kind of Bi-directional Buck converter, forward BUCK converter and negative sense BUCK converter are merged, and forward BUCK converter and negative sense BUCK converter shares same inductance, therefore, has simple in structure and the low advantage of cost.
Description of drawings
The first circuit theory diagrams of the Bi-directional Buck converter that Fig. 1 provides for the utility model;
The second circuit theory diagrams of the Bi-directional Buck converter that Fig. 2 provides for the utility model;
The third circuit theory diagrams of the Bi-directional Buck converter that Fig. 3 provides for the utility model;
The 4th kind of circuit theory diagrams of the Bi-directional Buck converter that Fig. 4 provides for the utility model;
The 5th kind of circuit theory diagrams of the Bi-directional Buck converter that Fig. 5 provides for the utility model;
The 6th kind of circuit theory diagrams of the Bi-directional Buck converter that Fig. 6 provides for the utility model;
The 7th kind of circuit theory diagrams of the Bi-directional Buck converter that Fig. 7 provides for the utility model;
The 8th kind of circuit theory diagrams of the Bi-directional Buck converter that Fig. 8 provides for the utility model;
The 9th kind of circuit theory diagrams of the Bi-directional Buck converter that Fig. 9 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated:
The utility model provides a kind of two-way BUCK converter, comprises forward BUCK converter and negative sense BUCK converter; Forward BUCK converter and negative sense BUCK converter differential concatenation; And forward BUCK converter and negative sense BUCK converter share identical inductances L.
Concrete, two-way BUCK converter comprises the first power supply and second source; The first positive source is connected with the second source positive pole and forms anodal circuit, and the first power cathode is connected with the second source negative pole and forms the negative pole circuit; Inductance L can have following three kinds of connected modes: (1) inductance L is connected on anodal circuit; (2) inductance L is connected on the negative pole circuit; (3) inductance L is split as the first inductance L 1 and the second inductance L 2, the first inductance L 1 are connected on anodal circuit, and the second inductance L 2 is connected on the negative pole circuit.As shown in Figure 2, be at positive polar road and the negative pole circuit circuit diagram of series inductance respectively.
Below forward BUCK converter and negative sense BUCK converter are introduced respectively in detail:
(1) forward BUCK converter
Forward BUCK converter is comprised of the first capacitor C 1, the first power tube Q1, the first sustained diode 1 and inductance L; The first capacitor C 1 is connected in parallel on the two ends of the first power supply; Be connected in parallel on the two ends of the first capacitor C 1 after the first power tube Q1 and 1 series connection of the first sustained diode; Wherein, the negative electrode of the first sustained diode 1 and anodal connection, tie point are P1; The anode of the first sustained diode 1 and negative pole connection, tie point are P2; Wherein, the first power tube Q1 and the first sustained diode 1 series system comprise following two kinds: (1) series connection A mode---the anode of the first power tube Q1 and the series connection of the negative electrode of the first sustained diode 1.(2) series connection B mode---the negative electrode of the first power tube Q1 and the series connection of the anode of the first sustained diode 1.
(2) negative sense BUCK converter
Negative sense BUCK converter is comprised of the second capacitor C 2, the second power tube Q2, the second sustained diode 2 and inductance L; The second capacitor C 2 is connected in parallel on the two ends of second source; Be connected in parallel on the two ends of the second capacitor C 2 after the second power tube Q2 and 2 series connection of the second sustained diode; Wherein, the negative electrode of the second sustained diode 2 and anodal connection, tie point are P3; The anode of the second sustained diode 2 and negative pole connection, tie point are P4; Wherein, the second power tube Q2 and the second sustained diode 2 series systems comprise following two kinds: (1) series connection C mode---the anode of the second power tube Q2 and the series connection of the negative electrode of the second sustained diode 2.(2) series connection D mode---the negative electrode of the second power tube Q2 and the series connection of the anode of the second sustained diode 2.
Three kinds of types of attachment of inductance L are: (1) connection A form---inductance L can be connected on the circuit P1P3; (2) connection B form---inductance L is connected on the circuit P2P4; (3) connection C form--inductance L is split as the first inductance L 1 and the second inductance L 2, and wherein, the first inductance L 1 is connected on the circuit P1P3, and the second inductance L 2 is connected on the circuit P2P4.
In the utility model, two kinds of series systems of the first power tube Q1 and the first sustained diode 1: series connection A mode, series connection B mode; Two kinds of series system series connection C modes of the second power tube Q2 and the second sustained diode 2, series connection D mode; And, three kinds of types of attachment of inductance L: connect the A form, connect the B form and be connected the C form; The following formula variety of way can combination in any, and for example: Fig. 1 is: series connection A mode+connection A form+series connection C mode; Fig. 2 is: series connection A mode+connection C form+series connection C mode; Fig. 3 is: series connection B mode+connection B form+series connection D mode; Fig. 4 is: series connection B mode+connection A form+series connection D mode; Fig. 5 is: series connection A mode+connection B form+series connection C mode; Fig. 6 is: series connection A mode+connection A form+series connection D mode; Fig. 7 is: series connection A mode+connection B form+series connection D mode; Fig. 8 is: series connection B mode+connection B form+series connection C mode; Fig. 9 is: series connection B mode+connection A form+series connection C mode.
The Bi-directional Buck converter that the utility model provides; can control simultaneously positive terminal voltage, negative terminal voltage; forward current and negative current; effectively system is carried out the voltage and current protection, and, forward BUCK converter and negative sense BUCK converter are merged; and; forward BUCK converter and negative sense BUCK converter share same inductance, therefore, have simple in structure and the low advantage of cost.
The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be looked protection range of the present utility model.
Claims (7)
1. a two-way BUCK converter is characterized in that, comprises forward BUCK converter and negative sense BUCK converter; Described forward BUCK converter and described negative sense BUCK converter differential concatenation; Described forward BUCK converter and described negative sense BUCK converter share identical inductances L.
2. two-way BUCK converter according to claim 1 is characterized in that, described two-way BUCK converter comprises the first power supply and second source; Described the first positive source is connected with described second source positive pole and forms anodal circuit, and described the first power cathode is connected with described second source negative pole and forms the negative pole circuit; Described inductance L is connected on described anodal circuit; Or described inductance L is connected on described negative pole circuit; Or described inductance L is split as the first inductance L 1 and the second inductance L 2, and described the first inductance L 1 is connected on described anodal circuit, and described the second inductance L 2 is connected on described negative pole circuit.
3. two-way BUCK converter according to claim 2 is characterized in that, described forward BUCK converter is comprised of the first capacitor C 1, the first power tube Q1, the first sustained diode 1 and described inductance L; Described the first capacitor C 1 is connected in parallel on the two ends of described the first power supply; Be connected in parallel on the two ends of described the first capacitor C 1 after described the first power tube Q1 and 1 series connection of described the first sustained diode; Wherein, the negative electrode of described the first sustained diode 1 and described anodal connection, tie point is P1; The anode of described the first sustained diode 1 and described negative pole connection, tie point is P2;
Described negative sense BUCK converter is comprised of the second capacitor C 2, the second power tube Q2, the second sustained diode 2 and described inductance L; Described the second capacitor C 2 is connected in parallel on the two ends of described second source; Be connected in parallel on the two ends of described the second capacitor C 2 after described the second power tube Q2 and 2 series connection of described the second sustained diode; Wherein, the negative electrode of described the second sustained diode 2 and described anodal connection, tie point is P3; The anode of described the second sustained diode 2 and described negative pole connection, tie point is P4;
Described inductance L is connected on the circuit P1P3; Perhaps, described inductance L is connected on the circuit P2P4; Perhaps described the first inductance L 1 is connected on the circuit P1P3, and described the second inductance L 2 is connected on the circuit P2P4.
4. two-way BUCK converter according to claim 3 is characterized in that, described the first power tube Q1 and described the first sustained diode 1 series system are: the negative electrode series connection of the anode of described the first power tube Q1 and described the first sustained diode 1.
5. two-way BUCK converter according to claim 3 is characterized in that, described the first power tube Q1 and described the first sustained diode 1 series system are: the anode series connection of the negative electrode of described the first power tube Q1 and described the first sustained diode 1.
6. two-way BUCK converter according to claim 3 is characterized in that, described the second power tube Q2 and described the second sustained diode 2 series systems are: the negative electrode series connection of the anode of described the second power tube Q2 and described the second sustained diode 2.
7. two-way BUCK converter according to claim 3 is characterized in that, described the second power tube Q2 and described the second sustained diode 2 series systems are: the anode series connection of the negative electrode of described the second power tube Q2 and described the second sustained diode 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320297006 CN203251225U (en) | 2013-05-28 | 2013-05-28 | Bi-directional Buck converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320297006 CN203251225U (en) | 2013-05-28 | 2013-05-28 | Bi-directional Buck converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203251225U true CN203251225U (en) | 2013-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320297006 Expired - Lifetime CN203251225U (en) | 2013-05-28 | 2013-05-28 | Bi-directional Buck converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203251225U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337956A (en) * | 2013-05-28 | 2013-10-02 | 北京联动天翼科技有限公司 | Bidirectional buck converter |
-
2013
- 2013-05-28 CN CN 201320297006 patent/CN203251225U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337956A (en) * | 2013-05-28 | 2013-10-02 | 北京联动天翼科技有限公司 | Bidirectional buck converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 100095 floor No. 1, courtyard No. 33, purple Bird Road, Haidian District, Beijing City, -1 to 5 floor 101 Patentee after: BEIJING LINKDATA TECHNOLOGIES CO.,LTD. Address before: 100044 Beijing city Haidian District Road No. 5 Building 2 401 P.Tricuspidata Patentee before: BEIJING LIANDONG TIANYI TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131023 |
|
| CX01 | Expiry of patent term |