CN104935174A - Full bridge DC-DC converter including adjustable inductance network - Google Patents
Full bridge DC-DC converter including adjustable inductance network Download PDFInfo
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- CN104935174A CN104935174A CN201510316150.8A CN201510316150A CN104935174A CN 104935174 A CN104935174 A CN 104935174A CN 201510316150 A CN201510316150 A CN 201510316150A CN 104935174 A CN104935174 A CN 104935174A
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- diode
- inductance network
- converter
- high frequency
- power switch
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Abstract
The invention provides a full bridge DC-DC converter including an adjustable inductance network. The full bridge DC-DC converter includes a primary side module composed of a single phase full bridge inverter circuit and the adjustable inductance network, a high frequency transformer and a secondary side module including a rectifying circuit. The primary side adjustable inductance network can adjust inductance according to input power, thereby allowing the converter to be always in a soft switching state. Meanwhile the primary side full bridge inverter circuit converts direct current into alternating current and transmits the alternating current to the secondary side module in a coupling manner, and the secondary side module is used for converting the received alternating current into direct current and then applying to loads. According to the full bridge DC-DC converter including the adjustable inductance network, the basic operating mode of the full bridge DC-DC converter is not changed by the usage of the adjustable inductance network, and the advantage that the original converter is simple to control can be maintained.
Description
Technical field
The present invention relates to a kind of DC-DC converter, is a kind of full-bridge DC-DC converter containing tunable inductance network specifically.
Background technology
full-bridge DC-DC converter can realize the electrical isolation of input and output on the one hand by its high frequency transformer, all switching tubes can realize Sofe Switch operating state under meeting some requirements on the other hand, therefore have the advantages such as capable transport efficiency is high, power density is high, fail safe is good.Application is obtained, as electric automobile battery charger, aerospace field in more industrial occasions.But full-bridge DC/DC converter through-put power is limited to the size of transformer equivalence leakage inductance, need the equivalent leakage inductance value of transformer in circuit less when through-put power is larger, but less leakage inductance value can make the power switch pipe in converter be difficult to realize Sofe Switch operating state when converter light running, and then cause converter efficiency of transmission low, heating is serious, the problems such as fluctuation of service.Existing solution concentrates on mostly increases the traffic coverage that auxiliary resonance circuit increases the Sofe Switch of power switch, and such scheme exists that passive device volume is large, cost is high and the problem such as control strategy is complicated.
Summary of the invention
For prior art above shortcomings, the invention provides a kind of full-bridge DC-DC converter containing tunable inductance network, solve the interval little problem of existing full-bridge DC-DC converter Sofe Switch on the one hand, on the other hand without the need to changing former convertor controls strategy, can not only increase converter soft switch operation interval, convertor controls mode is also simply easy to realize simultaneously.
The technical scheme that the present invention takes is:
A full-bridge DC-DC converter containing tunable inductance network, comprises the former limit module be made up of single-phase full bridge inverter circuit and tunable inductance network, a high frequency transformer T and comprises the secondary module of rectification circuit.Its former limit module comprises four power switch S
1, S
2, S
3, S
4, four diode D
1, D
2, D
3, D
4, four electric capacity C
1, C
2, C
3, C
4, a tunable inductance network, a high frequency transformer equivalence leakage inductance L
k.Described tunable inductance network is by n auxiliary switch S
a1, S
a2s
anwith n auxiliary induction L
a1, L
a2l
anform.Former limit module physical circuit type of attachment is as follows:
The positive pole of input power, power switch S
1, S
3drain electrode, diode D
1, D
3negative electrode and electric capacity C
1, C
3upper end be connected; The negative pole of input power, power switch S
2, S
4source electrode, diode D
2, D
4anode and electric capacity C
2, C
4lower end be connected; Power switch S
1source electrode, diode D
1anode, electric capacity C
1lower end, power switch S
2drain electrode, diode D
2negative electrode, electric capacity C
2upper end be connected, auxiliary switch S in its node and tunable inductance network
andrain electrode, auxiliary induction L
anleft end be connected; Auxiliary induction L in tunable inductance network
anright-hand member and auxiliary induction L
an-1left end and auxiliary switch S
an-1drain electrode be connected, auxiliary induction L
an-1right-hand member and auxiliary induction L
an-2left end and auxiliary switch S
an-2drain electrode be connected, by that analogy, until auxiliary induction L
a1right-hand member and high frequency transformer equivalence leakage inductance L
kleft end be connected, this node simultaneously with auxiliary switch S
a1, S
a2s
ansource electrode be connected;
Power switch S
3source electrode, diode D
3anode, electric capacity C
3lower end, power switch S
4drain electrode, diode D
4negative electrode, electric capacity C
4upper end be connected, its node is connected with high frequency transformer T input side lower end;
High frequency transformer equivalence leakage inductance L
kright-hand member be connected with high frequency transformer T input side upper end;
A full-bridge DC-DC converter containing tunable inductance network, its secondary module comprises four diode D
5, D
6, D
7, D
8, an output filter capacitor C
o, secondary module physical circuit type of attachment is as follows:
High frequency transformer T outlet side upper end and diode D
5anode, diode D
6negative electrode be connected; High frequency transformer T outlet side lower end and diode D
7anode, diode D
8negative electrode be connected; Diode D
5, D
7negative electrode and output filter capacitor C
oupper end and load upper end be connected; Diode D
6, D
8anode and output filter capacitor C
olower end and load lower end be connected;
Adding of described converter tunable inductance network, do not change the operation mode of converter, keep the original working method of whole converter, make converter maintain its original simple control strategy efficiently.
Compared to existing technology, a kind of full-bridge DC-DC converter containing tunable inductance network of the present invention, beneficial effect is as follows:
1), a kind of full-bridge DC-DC converter containing tunable inductance network of the present invention, tunable inductance network is added in full-bridge DC-DC converter inverter circuit, it can according to the size of converter through-put power, regulate the size of access auxiliary induction, ensure that converter works in Sofe Switch state all the time, improve the operating efficiency of converter.
2), the present invention do not change former convertor controls mode and way of realization thereof, has control strategy and is simple and easy to the advantages such as realization.
Accompanying drawing explanation
Fig. 1 is full-bridge DC-DC converter circuit structural representation of the prior art.
Fig. 2 is a kind of full-bridge DC-DC converter circuit structural representation containing tunable inductance network of the present invention.
Fig. 3 is a kind of full-bridge DC-DC converter circuit figure containing three auxiliary inductions that the present invention exemplifies.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 2, a kind of full-bridge DC-DC converter containing tunable inductance network, comprises the former limit module be made up of single-phase full bridge inverter circuit and tunable inductance network, a high frequency transformer T and comprises the secondary module of rectification circuit.Its former limit module comprises four power switch S
1, S
2, S
3, S
4, four diode D
1, D
2, D
3, D
4, four electric capacity C
1, C
2, C
3, C
4, a tunable inductance network, a high frequency transformer equivalence leakage inductance L
k.Described tunable inductance network is by n auxiliary switch S
a1, S
a2s
anwith n auxiliary induction L
a1, L
a2l
anform.Former limit module physical circuit type of attachment is as follows:
The positive pole of input power, power switch S
1, S
3drain electrode, diode D
1, D
3negative electrode and electric capacity C
1, C
3upper end be connected; The negative pole of input power, power switch S
2, S
4source electrode, diode D
2, D
4anode and electric capacity C
2, C
4lower end be connected; Power switch S
1source electrode, diode D
1anode, electric capacity C
1lower end, power switch S
2drain electrode, diode D
2negative electrode, electric capacity C
2upper end be connected, auxiliary switch S in its node and tunable inductance network
andrain electrode, auxiliary induction L
anleft end be connected; Auxiliary induction L in tunable inductance network
anright-hand member and auxiliary induction L
an-1left end and auxiliary switch S
an-1drain electrode be connected, auxiliary induction L
an-1right-hand member and auxiliary induction L
an-2left end and auxiliary switch S
an-2drain electrode be connected, by that analogy, until auxiliary induction L
a1right-hand member and high frequency transformer equivalence leakage inductance L
kleft end be connected, this node simultaneously with auxiliary switch S
a1, S
a2s
ansource electrode be connected;
Power switch S
3source electrode, diode D
3anode, electric capacity C
3lower end, power switch S
4drain electrode, diode D
4negative electrode, electric capacity C
4upper end be connected, its node is connected with high frequency transformer input side lower end;
High frequency transformer equivalence leakage inductance L
kright-hand member be connected with high frequency transformer input side upper end;
A full-bridge DC-DC converter containing tunable inductance network, its secondary module comprises four diode D
5, D
6, D
7, D
8, an output filter capacitor C
o, secondary module physical circuit type of attachment is as follows:
High frequency transformer outlet side upper end and diode D
5anode, diode D
6negative electrode be connected; High frequency transformer outlet side lower end and diode D
7anode, diode D
8negative electrode be connected; Diode D
5, D
7negative electrode and output filter capacitor C
oupper end and load upper end be connected; Diode D
6, D
8anode and output filter capacitor C
olower end and load lower end be connected.
The power switch S of former limit module
1, S
2, S
3, S
4be wholly-controled device, according to the switching tube needing selection dissimilar of workplace, only can illustrate for metal-oxide-semiconductor herein.Diode D
1, D
2, D
3, D
4can be power switch S
1, S
2, S
3, S
4parasitic diode, also the diode that is applicable to can be selected in parallel with two ends, switching tube drain-source pole according to described connected mode according to the needs of workplace; Electric capacity C
1, C
2, C
3, C
4can be power switch S
1, S
2, S
3, S
4parasitic capacitance, also the electric capacity that is applicable to can be selected in parallel with two ends, switching tube drain-source pole according to described connected mode according to the needs of workplace.
A kind of full-bridge DC-DC converter containing tunable inductance network of the present invention, according to input power P
iwith rated power P
nbetween magnitude relationship be divided into three kinds of mode of operations, composition graphs 3 is as follows to a kind of full-bridge DC-DC converter specific works pattern analysis containing tunable inductance network:
Work as P
i>0.75P
n, auxiliary switch S
a2conducting, the inductance of former limit module is only provided by the leakage inductance of transformer primary side winding, because converter through-put power is comparatively large, makes leakage inductance to have enough energy to realize the no-voltage conducting of power switch pipe in single-phase full bridge inverter circuit.
Work as 0.3P
n<P
i<0.75P
n, the energy in high frequency transformer leakage inductance can not realize power switch pipe no-voltage conducting in inverter circuit, now auxiliary switch S in tunable inductance network
a2turn off, S
a1conducting; Auxiliary induction L
a2devote oneself to work, because working inductance increases instantaneously, the electric current in single-phase full bridge inverter circuit is almost constant, so the energy on working inductance can increase, make converter have more energy to realize the conducting of power switch pipe no-voltage, therefore expand the operation interval of the Sofe Switch of converter.
Work as P
i<0.3P
n, transformer leakage inductance L
fwith auxiliary induction L
a2co-operation still can not realize the no-voltage conducting of power switch pipe in converter inverter circuit.Now auxiliary switch S
a1, S
a2turn off, auxiliary induction L
a1, L
a2with transformer leakage inductance L
fco-operation.Working inductance in the module single-phase full bridge inverter circuit of former limit increases further, and the energy on inductance also increases further, expands inverter circuit power switch pipe Sofe Switch operation interval further.Ensure that converter also can realize the Sofe Switch conducting of power switch pipe when underloading, reduce converter conduction loss, improve the operating efficiency of converter.
Tunable inductance network, just according to the size of converter through-put power, correspondingly regulates auxiliary induction size in the module single-phase full bridge inverter circuit of converter former limit.Ensure that converter is when input power is larger, its working inductance is less, reduces the time of inverter power backflow, improves the operating frequency of converter; And converter is when input power is less, increase its auxiliary induction, increase the Sofe Switch traffic coverage of power switch pipe in converter inverter circuit with this, improve the operating efficiency of converter.Tunable inductance network does not change the control strategy of former converter; Therefore it can not only increase converter soft switch operation interval, also remains convertor controls mode simple and be easy to the feature that realizes simultaneously.
Above-mentioned cited auxiliary switch power switching point 0.75P
nand 0.3P
nit is the instantiation conveniently describing and choose.A kind of full-bridge DC-DC converter containing tunable inductance network proposed by the invention, can there is corresponding change according to the difference of its application scenario and operating state in auxiliary switch power switching point in practical operation.Here cannot give exhaustive to all execution modes.
In sum, one aspect of the present invention solves the interval little problem of existing full-bridge DC-DC converter Sofe Switch, on the other hand without the need to changing former convertor controls strategy, can not only increase converter soft switch operation interval, convertor controls mode is also simply easy to realize simultaneously.Be applicable to the application scenario that some output power ranges change greatly.
Above-mentioned enforcement example of the present invention is only for example of the present invention is described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, other multi-form change and variations can also be made on the basis of the above description.Here cannot give exhaustive to all execution modes.Every belong to technical scheme of the present invention the apparent change of amplifying out or variation be still in the row of protection scope of the present invention.
Claims (6)
1. the full-bridge DC-DC converter containing tunable inductance network, comprises the former limit module be made up of single-phase full bridge inverter circuit and tunable inductance network, a high frequency transformer T and comprises the secondary module of rectification circuit, it is characterized in that:
It is alternating current that described former limit module is used for the DC conversion of input, and by high frequency transformer by secondary module extremely corresponding for alternating current transmission, described secondary module is used for the AC conversion received to become direct current, and then is put in load by the direct current be converted to.
2. a kind of full-bridge DC-DC converter containing tunable inductance network according to claim 1, is characterized in that: described former limit module comprises four power switch S
1, S
2, S
3, S
4, four diode D
1, D
2, D
3, D
4, four electric capacity C
1, C
2, C
3, C
4, a tunable inductance network, a high frequency transformer T equivalence leakage inductance L
k, described tunable inductance network is by n auxiliary switch S
a1, S
a2s
anwith n auxiliary induction L
a1, L
a2l
anform, former limit module physical circuit type of attachment is as follows:
The positive pole of input power, power switch S
1, S
3drain electrode, diode D
1, D
3negative electrode and electric capacity C
1, C
3upper end be connected; The negative pole of input power, power switch S
2, S
4source electrode, diode D
2, D
4anode and electric capacity C
2, C
4lower end be connected; Power switch S
1source electrode, diode D
1anode, electric capacity C
1lower end, power switch S
2drain electrode, diode D
2negative electrode, electric capacity C
2upper end be connected, auxiliary switch S in its node and tunable inductance network
andrain electrode, auxiliary induction L
anleft end be connected; Auxiliary induction L in tunable inductance network
anright-hand member and auxiliary induction L
an-1left end and auxiliary switch S
an-1drain electrode be connected, auxiliary induction L
an-1right-hand member and auxiliary induction L
an-2left end and auxiliary switch S
an-2drain electrode be connected, by that analogy, until auxiliary induction L
a1right-hand member and high frequency transformer equivalence leakage inductance L
kleft end be connected, this node simultaneously with auxiliary switch S
a1, S
a2s
ansource electrode be connected;
Power switch S
3source electrode, diode D
3anode, electric capacity C
3lower end, power switch S
4drain electrode, diode D
4negative electrode, electric capacity C
4upper end be connected, its node is connected with high frequency transformer T input side lower end;
High frequency transformer equivalence leakage inductance L
kright-hand member be connected with high frequency transformer T input side upper end.
3. a kind of full-bridge DC-DC converter containing tunable inductance network according to claim 1, is characterized in that: described secondary module comprises four diode D
5, D
6, D
7, D
8, an output filter capacitor C
o, secondary module physical circuit type of attachment is as follows:
High frequency transformer T outlet side upper end and diode D
5anode, diode D
6negative electrode be connected; High frequency transformer T outlet side lower end and diode D
7anode, diode D
8negative electrode be connected; Diode D
5, D
7negative electrode and output filter capacitor C
oupper end and load upper end be connected; Diode D
6, D
8anode and output filter capacitor C
olower end and load lower end be connected.
4. a kind of full-bridge DC-DC converter containing tunable inductance network according to claim 2, is characterized in that: described power switch S
1, S
2, S
3, S
4it is wholly-controled device; Or dissimilar switching tube.
5. a kind of full-bridge DC-DC converter containing tunable inductance network according to claim 2, is characterized in that: diode D
1, D
2, D
3, D
4power switch S
1, S
2, S
3, S
4parasitic diode; Or select the diode be applicable to according to described connected mode parallel connection and two ends, switching tube drain-source pole.
6. a kind of full-bridge DC-DC converter containing tunable inductance network according to claim 2, is characterized in that: described electric capacity C
1, C
2, C
3, C
4power switch S
1, S
2, S
3, S
4parasitic capacitance; Or select the electric capacity be applicable to according to described connected mode parallel connection and two ends, switching tube drain-source pole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510316150.8A CN104935174B (en) | 2015-06-10 | 2015-06-10 | A kind of full-bridge DC/DC converter containing tunable inductance network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510316150.8A CN104935174B (en) | 2015-06-10 | 2015-06-10 | A kind of full-bridge DC/DC converter containing tunable inductance network |
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| Publication Number | Publication Date |
|---|---|
| CN104935174A true CN104935174A (en) | 2015-09-23 |
| CN104935174B CN104935174B (en) | 2019-01-15 |
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ID=54122192
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|---|---|---|---|
| CN201510316150.8A Active CN104935174B (en) | 2015-06-10 | 2015-06-10 | A kind of full-bridge DC/DC converter containing tunable inductance network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614148A (en) * | 2020-03-14 | 2020-09-01 | 青岛鼎信通讯股份有限公司 | Charging station efficiency and dynamic performance improvement scheme based on energy router |
| CN112698090A (en) * | 2020-12-07 | 2021-04-23 | 中国计量大学 | Bidirectional electric energy metering device for DAB converter |
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| CN1937381A (en) * | 2006-10-13 | 2007-03-28 | 南京航空航天大学 | Zero-voltage switch full-bridge direct current converter |
| CN102231600A (en) * | 2011-07-08 | 2011-11-02 | 南京航空航天大学 | Novel full-bridge soft switch circuit applied to arc welding inverter power supply |
| CN102244388A (en) * | 2011-07-12 | 2011-11-16 | 上海华艾软件有限公司 | Reactive power compensation and filtering device with automatically adjustable inductance ratio |
| CN103189979A (en) * | 2010-10-29 | 2013-07-03 | 高通股份有限公司 | Package inductance compensating tunable capacitor circuit |
| CN203661322U (en) * | 2013-11-15 | 2014-06-18 | 美的集团股份有限公司 | Resonant control circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532388B (en) * | 2013-09-17 | 2017-01-11 | 中国科学院电工研究所 | Storage battery charging and discharging control method based on full bridge isolation two-way converter |
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2015
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1937381A (en) * | 2006-10-13 | 2007-03-28 | 南京航空航天大学 | Zero-voltage switch full-bridge direct current converter |
| CN103189979A (en) * | 2010-10-29 | 2013-07-03 | 高通股份有限公司 | Package inductance compensating tunable capacitor circuit |
| CN102231600A (en) * | 2011-07-08 | 2011-11-02 | 南京航空航天大学 | Novel full-bridge soft switch circuit applied to arc welding inverter power supply |
| CN102244388A (en) * | 2011-07-12 | 2011-11-16 | 上海华艾软件有限公司 | Reactive power compensation and filtering device with automatically adjustable inductance ratio |
| CN203661322U (en) * | 2013-11-15 | 2014-06-18 | 美的集团股份有限公司 | Resonant control circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614148A (en) * | 2020-03-14 | 2020-09-01 | 青岛鼎信通讯股份有限公司 | Charging station efficiency and dynamic performance improvement scheme based on energy router |
| CN112698090A (en) * | 2020-12-07 | 2021-04-23 | 中国计量大学 | Bidirectional electric energy metering device for DAB converter |
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| Publication number | Publication date |
|---|---|
| CN104935174B (en) | 2019-01-15 |
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