CN103929067A - Novel topological structure of isolated two-way DC/DC converter - Google Patents
Novel topological structure of isolated two-way DC/DC converter Download PDFInfo
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- CN103929067A CN103929067A CN201410186059.4A CN201410186059A CN103929067A CN 103929067 A CN103929067 A CN 103929067A CN 201410186059 A CN201410186059 A CN 201410186059A CN 103929067 A CN103929067 A CN 103929067A
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Abstract
The invention provides a novel topological structure of an isolated two-way DC/DC converter. The topological structure comprises a transformer T and an output filter circuit, wherein the output filter circuit is composed of a primary side magnetic reset circuit of the transformer, an auxiliary side magnetic reset circuit of the transformer, a main switching tube Q1, a rectifying tube Q2, a free-wheeling tube Q3, an inductor L1 and a capacitor C2. The topology of the two-way DC/DC converter is based on a single-ended forward circuit, the topological structure is simple, the control algorithm is simple, a system is low in cost, working efficiency is high, and the novel topological structure has wide application prospect in the field of switching power supplies.
Description
Technical field
The present invention relates to field of switch power, be 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, is equivalent to 2 single-phase DC/DC converters in function, and therefore cost is higher, and efficiency is lower.
Summary of the invention
Goal of the invention: the object of the invention is to for the deficiencies in the prior art, provide a kind of operating efficiency high, novel isolation type bidirectional DC/DC converter that volume is little.
Technical scheme: the invention provides a kind of topological structure of novel isolation type bidirectional DC/DC converter, 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.
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 is through the afterflow of Q3 pipe, 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 of the present invention based on single-end ortho-exciting circuit, simple for structure, control algolithm is simple, system cost is low, operating efficiency is high, have broad application prospects in field of switch power.
Particularly, it,, 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 with compared with power grade converter, this topology control method is simple, operating efficiency is high.
(3) application of synchronized commutation technique effectively reduces switching tube conduction loss, and system effectiveness is high.
Brief description of the drawings
Fig. 1 is that the embodiment of the present invention provides two-way DC/DC converter circuit figure;
Fig. 2 is the two-way DC/DC converter voltage output waveform figure that the embodiment of the present invention provides;
Fig. 3 is the two-way DC/DC converter efficiency for charge-discharge measured drawing that the embodiment of the present invention provides;
Fig. 4 be the embodiment of the present invention 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 embodiment of the present invention while flowing.
Embodiment
Below technical solution of the present invention is elaborated, but protection scope of the present invention 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 made up 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 is through the afterflow of Q3 pipe, 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).
When forward work, input voltage Ui=400V, switching frequency is 55kHz, output voltage waveforms is as shown in Figure 2.
Through measuring, voltage stabilizing when 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410186059.4A CN103929067A (en) | 2014-04-30 | 2014-04-30 | Novel topological structure of isolated two-way DC/DC converter |
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| CN201410186059.4A CN103929067A (en) | 2014-04-30 | 2014-04-30 | Novel topological structure of isolated two-way DC/DC converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280656A (en) * | 2014-10-21 | 2015-01-14 | 国家电网公司 | Direct-current grounding fault isolation signal collector |
| 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 |
| CN110289762A (en) * | 2019-07-02 | 2019-09-27 | 温州大学 | A kind of high-current supply and its constant current control method and system |
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| CN203827184U (en) * | 2014-04-30 | 2014-09-10 | 杨飏 | A novel topological structure for an isolation type bidirectional DC/DC converter |
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2014
- 2014-04-30 CN CN201410186059.4A patent/CN103929067A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203827184U (en) * | 2014-04-30 | 2014-09-10 | 杨飏 | A novel topological structure for an isolation type bidirectional DC/DC converter |
Non-Patent Citations (6)
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| 吴峂: "基于同步整流技术的全数字双向DC/DC变换器的研制", 《中国优秀硕士学位论文全文数据库（工程科技Ⅱ辑）》 * |
| 吴峂等: "一种新颖的全数字双向DC/DC变换器的研制", 《电源世界》 * |
| 吴峂等: "全数字双向DC/DC变换器的研制", 《电力电子技术》 * |
| 吴峂等: "基于同步整流技术的全数字双向DC/DC变换器的研制", 《电气应用》 * |
| 吴峂等: "基于微控制器的全数字双向DC/DC变换器的研制", 《电源技术应用》 * |
| 童亦斌等: "双向DC/DC变换器的拓扑研究", 《中国电机工程学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280656A (en) * | 2014-10-21 | 2015-01-14 | 国家电网公司 | Direct-current grounding fault isolation signal collector |
| 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 |
| CN110289762A (en) * | 2019-07-02 | 2019-09-27 | 温州大学 | A kind of high-current supply and its constant current control method and system |
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Application publication date: 20140716 |