CN203827184U - A novel topological structure for an isolation type bidirectional DC/DC converter - Google Patents
A novel topological structure for an isolation type bidirectional DC/DC converter Download PDFInfo
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- CN203827184U CN203827184U CN201420225824.4U CN201420225824U CN203827184U CN 203827184 U CN203827184 U CN 203827184U CN 201420225824 U CN201420225824 U CN 201420225824U CN 203827184 U CN203827184 U CN 203827184U
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- transformer
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- isolation type
- diode
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- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 15
- 238000002955 isolation Methods 0.000 title claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims abstract description 18
- 238000004804 winding Methods 0.000 claims description 10
- 238000004146 energy storage Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Dc-Dc Converters (AREA)
Abstract
The utility model provides a novel topological structure for an isolation type bidirectional DC/DC converter. The novel topological structure for the isolation type bidirectional DC/DC converter comprises a voltage transformer T and an original secondary side magnetic reset circuit of the voltage transformer T, a main switch tube Q1, a rectifier tube Q2, a freewheeling tube Q3 and an output filter circuit composed of an inductor L1 and a capacitor C2. The topology employs a bidirectional DC/DC converter topology based on a single-end forward circuit; the structure is simple and concise; a control algorithm is simple; system costs are low; and the working efficiency is high. The novel topological structure for the isolation type bidirectional DC/DC converter has a broad application prospect in the field of switch power supplies.
Description
Technical field
The utility model relates to field of switch power, is specially a kind of topological structure of novel isolation type bidirectional DC/DC converter.
Background technology
For volume weight and the cost of the power supply of mitigation system, two-way DC/DC converter has been widely used in the occasions such as ups system, space power system, electric automobile driving at present.Tradition isolation type bidirectional DC/DC has realized the transmitted in both directions of energy, be equivalent to 2 single-phase DC/DC converters, so cost is higher, and efficiency is lower in function.
Utility model content
Utility model object: the purpose of this utility model is for the deficiencies in the prior art, provides a kind of operating efficiency high, novel isolation type bidirectional DC/DC converter that volume is little.
Technical scheme: the utility model provides a kind of topological structure of novel isolation type bidirectional DC/DC converter, comprises
Transformer T;
The former limit of transformer T magnetic reset circuit adopts the 3rd winding Clamp; The former limit of transformer T centre tap is connected with input power Ui is anodal; Different name end is connected with the drain electrode of main switch Q1, and the source electrode of main switch Q1 is connected with input power Ui; The 3rd Motor Winding Same Name of Ends on the former limit of transformer T is connected with the negative electrode of diode D1, and the anode of diode D1 is connected with input power Ui negative pole;
The Same Name of Ends of transformer T secondary is connected with one end of resistance R 1, capacitor C 1 parallel circuits, and the other end of resistance R 1, capacitor C 1 parallel circuits is connected with the negative electrode of diode D2, the different name end of another termination transformer T secondary of diode D2; The drain electrode end of rectifying tube Q2 is connected with the different name end of transformer T, and its source terminal is connected with the source terminal of continued flow tube Q3, and the drain electrode end of continued flow tube Q3 is connected with the Same Name of Ends of transformer T secondary; Inductance L 1 and capacitor C 2 are composed in series output filter circuit, and inductance L 1 one end is connected with the drain electrode end of continued flow tube Q3, and capacitor C 2 is connected with the source terminal of rectifying tube Q2, load U
0in parallel with capacitor C 2.
Described isolation type bidirectional DC/DC converter energy forward flow has 4 stages:
Stage 1 (energy forward flow): main switch Q1 and rectifying tube Q2 conducting.The Same Name of Ends of the former limit of input current I1 inflow transformer winding, output current I2 flows out the Same Name of Ends of transformer time limit winding.
Stage 2 (Dead Time): supervisor Q1 and rectifying tube Q2 turn-off, not conducting but its body diode conducting of continued flow tube Q3.
Stage 3 (afterflow stage): continued flow tube Q3 conducting, I2 manages afterflow through Q3, and conduction loss greatly lowers.
Stage 4 (Dead Time 2): continued flow tube Q3 turn-offs, its body diode conducting.I2 is completely by this body diode afterflow.
Described isolation type bidirectional DC/DC converter energy back flow process is consistent with Boost circuit, has 2 stages:
Stage 1 (afterflow): continued flow tube Q3 conducting, rectifying tube Q2 turn-offs, and discharging current I2 flows through inductance coil L, and electric current is linear to be increased, L energy storage.
Stage 2 (back discharge): continued flow tube Q3 turn-offs, rectifying tube Q2 conducting.The magnetic energy that inductance L is deposited energy storage is converted to electric energy and discharges to input side.
Beneficial effect: the two-way DC/DC converter topology of two-way DC/DC converter using described in the utility model based on single-end ortho-exciting circuit, simple for structure, control algolithm is simple, system cost is low, operating efficiency is high, in field of switch power, have broad application prospects.
Particularly, it is compared with traditional isolation type bidirectional DC/DC converter, has following outstanding advantage:
(1) be applied on ups system, this topological structure is succinct, and volume is little, has reduced system cost.
(2) with traditional comparing with power grade converter, this topology control method is simple, and operating efficiency is high.
(3) application of synchronized commutation technique effectively reduces switching tube conduction loss, and system effectiveness is high.
Accompanying drawing explanation
Fig. 1 is that the utility model embodiment provides two-way DC/DC converter circuit figure;
Fig. 2 is the two-way DC/DC converter voltage output waveform figure that the utility model embodiment provides;
Fig. 3 is the two-way DC/DC converter efficiency for charge-discharge measured drawing that the utility model embodiment provides;
Fig. 4 be the utility model embodiment provide DC/DC converter energy forward flow time working state figure;
Fig. 5 is the working state figure of the DC/DC converter energy back that provides of the utility model embodiment while flowing.
Embodiment
Below technical solutions of the utility model are elaborated, but protection range of the present utility model is not limited to described embodiment.
The topological structure of novel isolation type bidirectional DC/DC converter, see Fig. 1, comprising: main switch Q1, transformer T, diode D2, one by resistance R 1 and secondary magnetic reset circuit, rectifying tube Q2, a continued flow tube Q3, an output filter circuit being comprised of inductance L 1 and capacitor C 2 and a diode D1 that capacitor C 1 forms;
The former limit of transformer T magnetic reset circuit adopts the 3rd winding Clamp; The former limit of transformer T centre tap is connected with input power Ui is anodal; Different name end is connected with the drain electrode of main switch Q1, and the source electrode of main switch Q1 is connected with input power Ui; The 3rd Motor Winding Same Name of Ends on the former limit of transformer T is connected with the negative electrode of diode D1, and the anode of diode D1 is connected with input power Ui negative pole;
The Same Name of Ends of transformer T secondary is connected with one end of resistance R 1, capacitor C 1 parallel circuits, and the other end of resistance R 1, capacitor C 1 parallel circuits is connected with the negative electrode of diode D2, the different name end of another termination transformer T secondary of diode D2; The drain electrode end of rectifying tube Q2 is connected with the different name end of transformer T, and its source terminal is connected with the source terminal of continued flow tube Q3, and the drain electrode end of continued flow tube Q3 is connected with the Same Name of Ends of transformer T secondary; Inductance L 1 and capacitor C 2 are composed in series output filter circuit, and inductance L 1 one end is connected with the drain electrode end of continued flow tube Q3, and capacitor C 2 is connected with the source terminal of rectifying tube Q2, load U
0in parallel with capacitor C 2.
Described two-way DC/DC converter energy forward flow has 4 stages:
Stage 1 (energy forward flow): main switch Q1 and rectifying tube Q2 conducting.The Same Name of Ends of the former limit of input current I1 inflow transformer winding, output current I2 flows out the Same Name of Ends of transformer time limit winding.As shown in Fig. 4 (a).
Stage 2 (Dead Time): supervisor Q1 and rectifying tube Q2 turn-off, not conducting but its body diode conducting of continued flow tube Q3.As shown in Fig. 4 (b).
Stage 3 (afterflow stage): continued flow tube Q3 conducting, I2 manages afterflow through Q3, and conduction loss greatly lowers.As shown in Fig. 4 (c).
Stage 4 (Dead Time 2): continued flow tube Q3 turn-offs, its body diode conducting.I2 is completely by this body diode afterflow.As shown in Fig. 4 (d).
When described two-way DC/DC converter energy back flows, the course of work is consistent with Boost circuit, has 2 stages:
Stage 1 (afterflow): continued flow tube Q3 conducting, rectifying tube Q2 turn-offs, and discharging current I2 flows through inductance coil L, and electric current is linear to be increased, L energy storage.As shown in Fig. 5 (a).
Stage 2 (back discharge): continued flow tube Q3 turn-offs, rectifying tube Q2 conducting.The magnetic energy that inductance L is deposited energy storage is converted to electric energy and discharges to input side.As shown in Fig. 5 (b).
During forward work, input voltage Ui=400V, switching frequency is 55kHz, output voltage waveforms is as shown in Figure 2.
Through measuring, voltage stabilizing during system works, precision of steady current all can be less than 0.5% designing requirement; Device peak efficiency is 87.6%, and the efficiency experimental waveform of system as shown in Figure 3.
Claims (1)
1. a topological structure for novel isolation type bidirectional DC/DC converter, is characterized in that: comprise transformer T;
The former limit of transformer T magnetic reset circuit adopts the 3rd winding Clamp; The former limit of transformer T centre tap is connected with input power Ui is anodal; Different name end is connected with the drain electrode of main switch Q1, and the source electrode of main switch Q1 is connected with input power Ui; The 3rd Motor Winding Same Name of Ends on the former limit of transformer T is connected with the negative electrode of diode D1, and the anode of diode D1 is connected with input power Ui negative pole;
The Same Name of Ends of transformer T secondary is connected with one end of resistance R 1, capacitor C 1 parallel circuits, and the other end of resistance R 1, capacitor C 1 parallel circuits is connected with the negative electrode of diode D2, the different name end of another termination transformer T secondary of diode D2; The drain electrode end of rectifying tube Q2 is connected with the different name end of transformer T, and its source terminal is connected with the source terminal of continued flow tube Q3, and the drain electrode end of continued flow tube Q3 is connected with the Same Name of Ends of transformer T secondary; Inductance L 1 and capacitor C 2 are composed in series output filter circuit, and inductance L 1 one end is connected with the drain electrode end of continued flow tube Q3, and capacitor C 2 is connected with the source terminal of rectifying tube Q2, load U
0in parallel with capacitor C 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420225824.4U CN203827184U (en) | 2014-04-30 | 2014-04-30 | A novel topological structure for an isolation type bidirectional DC/DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420225824.4U CN203827184U (en) | 2014-04-30 | 2014-04-30 | A novel topological structure for an isolation type bidirectional DC/DC converter |
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| Publication Number | Publication Date |
|---|---|
| CN203827184U true CN203827184U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420225824.4U Expired - Fee Related CN203827184U (en) | 2014-04-30 | 2014-04-30 | A novel topological structure for an isolation type bidirectional DC/DC converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929067A (en) * | 2014-04-30 | 2014-07-16 | 杨飏 | Novel topological structure of isolated two-way DC/DC converter |
| CN105071658A (en) * | 2014-12-26 | 2015-11-18 | 中国船舶重工集团公司第七一九研究所 | Control method for reducing bi-directional forward converter switching tube voltage spike and loop current |
-
2014
- 2014-04-30 CN CN201420225824.4U patent/CN203827184U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103929067A (en) * | 2014-04-30 | 2014-07-16 | 杨飏 | Novel topological structure of isolated two-way DC/DC converter |
| CN105071658A (en) * | 2014-12-26 | 2015-11-18 | 中国船舶重工集团公司第七一九研究所 | Control method for reducing bi-directional forward converter switching tube voltage spike and loop current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NANJING ZIQIANG RAILROAD VEHICLE PARTS CO., LTD. Free format text: FORMER OWNER: YANG YANG Effective date: 20150408 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Huang Jiuhua Inventor after: Yang Yang Inventor before: Yang Yang |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: YANG YANG TO: HUANG JIUHUA YANG YANG |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150408 Address after: 211299 Lishui Economic Development Zone, Jiangsu, Nanjing Patentee after: Improve oneself railway vehicle fittings Co., Ltd in Nanjing Address before: Lishui District of Nanjing City, Jiangsu province 211299 Yong Yang Town Natural Bridge Road No. 688 Lishui District Branch Center Patentee before: Yang Yang |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20160430 |