CN102035382B - Single-magnetic core three-port direct current (DC) converters - Google Patents
Single-magnetic core three-port direct current (DC) converters Download PDFInfo
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- CN102035382B CN102035382B CN 201010592406 CN201010592406A CN102035382B CN 102035382 B CN102035382 B CN 102035382B CN 201010592406 CN201010592406 CN 201010592406 CN 201010592406 A CN201010592406 A CN 201010592406A CN 102035382 B CN102035382 B CN 102035382B
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Abstract
The invention discloses four single-magnetic core three-port direct current (DC) converters belonging to the field of electric/electronic converters. Each of the four converters comprises three switching tubes, three diodes, a filtering capacitor and a filtering inductor (or transformer), and is connected with an input source, an accumulator and a load. The power management of a main power source, the accumulator and the load can be simultaneously realized by using one converter. By only using one magnetic element in each converter, each converter provided by the invention has the advantages of small volume, light weight and high power density. Besides, since the ports are single-stage, the invention can effectively complete the power management and control of the system, thereby being applicable to power supply and new energy generating systems of space satellites.
Description
Technical field
The present invention relates to four kinds of single magnetic core three-port DC converters in the power inverter, belong to the converters field.
Background technology
Along with energy crisis and problem of environmental pollution are serious day by day, generation of electricity by new energy technology such as solar energy, wind energy, fuel cell become that countries in the world are paid close attention to and the focus of research.The grid-connected power generation system of independent operating is very important a kind of mode that generation of electricity by new energy is used; Can solve the powerup issue in no electrical network such as remote mountain areas, isolated island area, in addition, in the space satellite generally with solar energy as input source; Storage battery is as stand-by power supply; Supply power to satellite jointly, this structure is consistent with the structure of independent grid-connected power generation system, and therefore the research to independent grid-connected power generation system can further be applied to fields such as space satellite electric power system.
The intrinsic defective of generation of electricity by new energy equipment is that independent new energy system has brought some a new difficult problem and challenges, as: the response speed of fuel cell is slower, and power output can not in time be followed the tracks of the variation of load; Wind energy, solar power generation can not continue owing to receive the influence that natural conditions such as wind speed, wind direction, intensity of sunshine, ambient temperature change, stable output electric energy, causes the increase of stability of a system problem.Therefore, the grid-connected power generation system of independent operating must be equipped with the energy storage device of a constant volume.Energy storage device plays energy balance and supporting role; The peak power in short-term of timely replenishment system; Reclaim surplus power, guarantee the continuity and the reliability of power supply, improve the utilance of electric energy; And make generating equipment when the fluctuation of power output or bearing power is big, still can keep good stable property.
Comprise in the independent grid-connected power generation system of energy storage link; Owing to need manage input source, storage battery and load three's power simultaneously; Generally need to adopt two or more converters accomplish the system power managerial role jointly, each converter decentralized control, system bulk, weight are big; And have multistage Power Conversion, system effectiveness is lower.To the problem of above-mentioned application background and existence, the researcher proposes to adopt three port converters to replace above-mentioned a plurality of independently converter to realize the power management of independent grid-connected power generation system, like document " Danwei Liu; Hui Li.A ZVS Bi-Directional DC-DC Converter for Multiple Energy Storage Elements; IEEE Transactions on Power Electronics, 2006, vol.21 (5): 1513-1517 "; Document " Chuanhong Zhao; Simon D.Round, Johann W.Kolar.An Isolated Three-Port Bidirectional DC-DC Converter With Decoupled Power Flow Management, IEEE Transactions on Power Electronics; 2008; 23 (5): 2443-2553 " and document " Hariharan Krishnaswami, Ned Mohan.Three-Port Series Resonant DC-DC Converter to Interface Renewable Energy Sources With Bidirectional Loadand Energy Storage Ports, IEEE Transactions on Power Electronics; 2009; 24 (10): 2289-2297 " have proposed several kinds of three different port converters, and its common feature is that each port all isolates through Transformer Winding each other, so is isolated variable between the port; The switching tube quantity of using is more, and conversion efficiency can be affected.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, can realize input source, storage battery and bearing power management and the single magnetic core three-port DC converter of controlling simultaneously and propose four kinds.
The structure of first kind of single magnetic core three-port DC converter comprises: input source, storage battery, first to the 3rd switching tube, first to the 3rd diode, filter capacitor and filter inductance; Wherein: the anode of first diode connects the positive pole of input source; The negative electrode of first diode connects the source electrode of the 3rd switching tube and an end of filter inductance respectively; The other end of filter inductance connects the anode of second diode, the anode of the 3rd diode and the drain electrode of first switching tube respectively; The negative electrode of second diode connects an end of filter capacitor and an end of load respectively; The drain electrode of the 3rd switching tube connects the positive pole of storage battery and the source electrode of second switch pipe respectively; The drain electrode of second switch pipe connects the negative electrode of the 3rd diode, and the negative pole of input source connects the negative pole of storage battery, the source electrode of first switching tube, the other end of filter capacitor and the other end of load respectively.
The structure of second kind of single magnetic core three-port DC converter comprises: input source, storage battery, first to the 3rd switching tube, first to the 3rd diode, filter capacitor and filter inductance; Wherein: the drain electrode of first switching tube connects the positive pole of input source; The source electrode of first switching tube connects the source electrode of the 3rd switching tube, the negative electrode of first diode and an end of filter inductance respectively; The other end of filter inductance connects the drain electrode of the anode and the second switch pipe of the 3rd diode respectively; The source electrode of second switch pipe connects an end of filter capacitor and an end of load respectively; The drain electrode of the 3rd switching tube connects the negative electrode of second diode; The anode of second diode connects the positive pole of storage battery and the negative electrode of the 3rd diode respectively, and the negative pole of input source connects the negative pole of storage battery, the anode of first diode, the other end of filter capacitor and the other end of load respectively.
The structure of the third single magnetic core three-port DC converter comprises: input source, storage battery, first to the 3rd switching tube, first to the 3rd diode, filter capacitor and filter inductance; Wherein: the anode of first diode connects the positive pole of input source; The negative electrode of first diode connects the source electrode of the 3rd switching tube, an end of filter inductance and the negative electrode of second diode respectively; The anode of second diode connects an end of filter capacitor and an end of load respectively; The drain electrode of the 3rd switching tube connects the positive pole of storage battery and the source electrode of second switch pipe respectively; The drain electrode of second switch pipe connects the negative electrode of the 3rd diode; The anode of the 3rd diode connects the drain electrode of first switching tube, the other end of filter inductance, the other end of filter capacitor and the other end of load respectively, and the negative pole of input source connects the negative pole of storage battery and the source electrode of first switching tube respectively.
The structure of the 4th kind of single magnetic core three-port DC converter comprises: input source, storage battery, first to the 3rd switching tube, first to the 3rd diode, transformer and filter capacitor; Said transformer comprises former limit winding and secondary winding; Wherein: the anode of first diode connects the positive pole of input source; The negative electrode of first diode connects the source electrode of the 3rd switching tube and the end of the same name of former limit winding respectively; The drain electrode of the 3rd switching tube connects the positive pole of storage battery and the source electrode of second switch pipe respectively, and the drain electrode of second switch pipe connects the negative electrode of the 3rd diode, and the anode of the 3rd diode connects the drain electrode of the non-same polarity and first switching tube of former limit winding respectively; The negative pole of input source connects the negative pole of storage battery and the source electrode of first switching tube respectively; The non-same polarity of secondary winding connects the anode of second diode, and the negative electrode of second diode connects an end of filter capacitor and an end of load respectively, and the end of the same name of secondary winding connects the other end of filter capacitor and the other end of load respectively.
The present invention has following technique effect:
(1) power management and the control of input source, storage battery and load have been realized through a converter;
(2) converter only adopts a magnetic elements, and volume is little, in light weight, power density is high, cost is low;
(3) be single-stage between any two ports, system effectiveness is high;
(4) whole converter becomes as a whole, adopts centralized control, and control is simple, reliability is high.
Description of drawings
Fig. 1 is the structure principle chart of first kind of single magnetic core three-port DC converter of the present invention.
Fig. 2 is the structure principle chart of second kind of single magnetic core three-port DC converter of the present invention.
Fig. 3 is the structure principle chart of the third single magnetic core three-port DC converter of the present invention.
Fig. 4 is the structure principle chart of the 4th kind of single magnetic core three-port DC converter of the present invention.
Equivalent circuit diagram when Fig. 5 (a) is operated in the dual output pattern for converter shown in Figure 1; Equivalent circuit diagram when Fig. 5 (b) is operated in the dual input pattern for converter shown in Figure 1; Fig. 5 (c) is the equivalent circuit diagram during the single output mode of single input for converter shown in Figure 1 is operated in.
Designation among Fig. 1～Fig. 5: V
InBe input (direct current) source; V
bBe storage battery; R
oBe load; T is a transformer; N
PBe the former limit of transformer winding; N
SBe transformer secondary winding; S
1, S
2, S
3Be respectively first, second, third switching tube; D
1, D
2, D
3Be respectively first, second, third diode; C
oBe filter capacitor; L
oBe filter inductance; v
LoBe the filter inductance voltage; i
LoBe the filter inductance electric current; V
oBe output voltage.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
As shown in Figure 1, first kind of single magnetic core three-port DC converter of the present invention comprises input source V
In, storage battery V
b, first to the 3rd switching tube S
1, S
2, S
3, first to the 3rd diode D
1, D
2, D
3, filter capacitor C
oWith filter inductance L
o, wherein: the first diode D
1Anode connect input source V
InPositive pole, the first diode D
1Negative electrode connect the 3rd switching tube S respectively
3Source electrode and filter inductance L
oAn end, filter inductance L
oThe other end connect the second diode D respectively
2Anode, the 3rd diode D
3The anode and the first switching tube S
1Drain electrode, the second diode D
2Negative electrode connect filter capacitor C respectively
oAn end and load R
oAn end, the 3rd switching tube S
3Drain electrode connect storage battery V respectively
bPositive pole and second switch pipe S
2Source electrode, second switch pipe S
2Drain electrode connect the 3rd diode D
3Negative electrode, input source V
InNegative pole connect storage battery V respectively
bNegative pole, the first switching tube S
1Source electrode, filter capacitor C
oThe other end and load R
oThe other end.
As shown in Figure 2, second kind of single magnetic core three-port DC converter of the present invention comprises input source V
In, storage battery V
b, first to the 3rd switching tube S
1, S
2, S
3, first to the 3rd diode D
1, D
2, D
3, filter capacitor C
oWith filter inductance L
o, wherein: the first switching tube S
1Drain electrode connect input source V
InPositive pole, the first switching tube S
1Source electrode connect the 3rd switching tube S respectively
3Source electrode, the first diode D
1Negative electrode and filter inductance L
oAn end, filter inductance L
oThe other end connect the 3rd diode D respectively
3Anode and second switch pipe S
2Drain electrode, second switch pipe S
2Source electrode connect filter capacitor C respectively
oAn end and load R
oAn end, the 3rd switching tube S
3Drain electrode connect the second diode D
2Negative electrode, the second diode D
2Anode connect storage battery V respectively
bPositive pole and the 3rd diode D
3Negative electrode, input source V
InNegative pole connect storage battery V respectively
bNegative pole, the first diode D
1Anode, filter capacitor C
oThe other end and load R
oThe other end.
As shown in Figure 3, the third single magnetic core three-port DC converter of the present invention comprises input source V
In, storage battery V
b, first to the 3rd switching tube S
1, S
2, S
3, first to the 3rd diode D
1, D
2, D
3, filter capacitor C
oWith filter inductance L
o, wherein: the first diode D
1Anode connect input source V
InPositive pole, the first diode D
1Negative electrode connect the 3rd switching tube S respectively
3Source electrode, filter inductance L
oAn end and the second diode D
2Negative electrode, the second diode D
2Anode connect filter capacitor C respectively
oAn end and load R
oAn end, the 3rd switching tube S
3Drain electrode connect storage battery V respectively
bPositive pole and second switch pipe S
2Source electrode, second switch pipe S
2Drain electrode connect the 3rd diode D
3Negative electrode, the 3rd diode D
3Anode connect the first switching tube S respectively
1Drain electrode, filter inductance L
oThe other end, filter capacitor C
oThe other end and load R
oThe other end, input source V
InNegative pole connect storage battery V respectively
bThe negative pole and the first switching tube S
1Source electrode.
As shown in Figure 4, the 4th kind of single magnetic core three-port DC converter of the present invention comprises input source V
In, storage battery V
b, first to the 3rd switching tube S
1, S
2, S
3, first to the 3rd diode D
1, D
2, D
3, transformer T and filter capacitor C
o, said transformer T comprises former limit winding N
PWith secondary winding N
S, wherein: the first diode D
1Anode connect input source V
InPositive pole, the first diode D
1Negative electrode connect the 3rd switching tube S respectively
3Source electrode and former limit winding N
PEnd of the same name, the 3rd switching tube S
3Drain electrode connect storage battery V respectively
bPositive pole and second switch pipe S
2Source electrode, second switch pipe S
2Drain electrode connect the 3rd diode D
3Negative electrode, the 3rd diode D
3Anode connect former limit winding N respectively
PThe non-same polarity and the first switching tube S
1Drain electrode, input source V
InNegative pole connect storage battery V respectively
bThe negative pole and the first switching tube S
1Source electrode, secondary winding N
SNon-same polarity connect the second diode D
2Anode, the second diode D
2Negative electrode connect filter capacitor C respectively
oAn end and load R
oAn end, secondary winding N
SEnd of the same name connect filter capacitor C respectively
oThe other end and load R
oThe other end.
First kind of converter of the present invention is applicable to input source V
InVoltage, storage battery V
bVoltage and load R
oThe output voltage V of end
oSatisfy V
In＜V
b＜V
oThe application scenario; Second kind of converter of the present invention is applicable to input source V
InVoltage, storage battery V
bVoltage and load R
oThe output voltage V of end
oSatisfy V
In＞V
b＞V
oThe application scenario; Third and fourth kind of converter of the present invention is applicable to input source V
InVoltage, storage battery V
bVoltage satisfies V
In＜V
bThe application scenario, to load end R
oOutput voltage V
oThen not restriction.
Be that example is explained concrete operation principle of the present invention with single magnetic core three-port DC converter shown in Figure 1 below, the operation principle of other three kinds of single magnetic core three-port DC converters similarly.
Converter shown in Figure 1 is applicable to independent new energy system, in this system, and input source V
InMain energy source as system provides power to load.As input source V
InThe power of input is greater than load R
oDuring the power that needs, unnecessary power is to storage battery V
bCharging claims that this kind mode of operation is the dual output pattern; As input source V
InThe power of input is less than load R
oDuring the power that needs, not enough power is by storage battery V
bDischarge provides, and claims that this kind mode of operation is the dual input pattern; As input source V
InWhen the power of input is zero, storage battery V
bSeparately to load R
oPower supply claims that this kind mode of operation is the single output mode of single input.System can be according to input source V
InWith load R
oOperating state come to select automatically dual input, dual output or the single output mode of single input to carry out work.
When converter works in the dual output pattern, the 3rd switching tube S
3Turn-off, through controlling the first and second switching tube S always
1, S
2The power of opening and turn-off management system, the equivalent electric circuit of converter shown in Fig. 5 (a), this moment converter be equivalent to dual output Boost converter.
When converter works in the dual input pattern, second switch pipe S
2Turn-off, through controlling the first and the 3rd switching tube S always
1, S
3The power of opening and turn-off management system, the equivalent electric circuit of converter shown in Fig. 5 (b), this moment converter be equivalent to dual input Boost converter.
When converter works in the single output mode of single input, the 3rd switching tube S
3Conducting always, second switch pipe S
2Turn-off, through controlling the first switching tube S always
1The power of opening and turn-off management system, the equivalent electric circuit of converter shown in Fig. 5 (c), this moment converter be equivalent to common Boost converter.
List the specific embodiment parameter of converter shown in Figure 1 below: input source V
InVoltage between 14～22V, change storage battery V
bVoltage be 24V, output voltage V
oBe 30V, input source V
InPower between 0～200W, change load R
oPower invariability be 140W, first, second, third switching tube S
1, S
2, S
3All select MOSFET for use, the switching tube switching frequency is 80kHz, first, second, third diode D
1, D
2, D
3All select Schottky diode for use.
Claims (4)
1. a single magnetic core three-port DC converter is characterized in that: comprise input source (V
In), storage battery (V
b), first to the 3rd switching tube (S
1, S
2, S
3), first to the 3rd diode (D
1, D
2, D
3), filter capacitor (C
o) and filter inductance (L
o), wherein: the first diode (D
1) anode connect input source (V
In) positive pole, the first diode (D
1) negative electrode connect the 3rd switching tube (S respectively
3) source electrode and filter inductance (L
o) an end, filter inductance (L
o) the other end connect the second diode (D respectively
2) anode, the 3rd diode (D
3) the anode and the first switching tube (S
1) drain electrode, the second diode (D
2) negative electrode connect filter capacitor (C respectively
o) an end and load (R
o) an end, the 3rd switching tube (S
3) drain electrode connect storage battery (V respectively
b) positive pole and second switch pipe (S
2) source electrode, second switch pipe (S
2) drain electrode connect the 3rd diode (D
3) negative electrode, input source (V
In) negative pole connect storage battery (V respectively
b) negative pole, the first switching tube (S
1) source electrode, filter capacitor (C
o) the other end and load (R
o) the other end;
Said input source (V
In), storage battery (V
b) and load (R
o) respectively as a port in three ports.
2. a single magnetic core three-port DC converter is characterized in that: comprise input source (V
In), storage battery (V
b), first to the 3rd switching tube (S
1, S
2, S
3), first to the 3rd diode (D
1, D
2, D
3), filter capacitor (C
o) and filter inductance (L
o), wherein: the first switching tube (S
1) drain electrode connect input source (V
In) positive pole, the first switching tube (S
1) source electrode connect the 3rd switching tube (S respectively
3) source electrode, the first diode (D
1) negative electrode and filter inductance (L
o) an end, filter inductance (L
o) the other end connect the 3rd diode (D respectively
3) anode and second switch pipe (S
2) drain electrode, second switch pipe (S
2) source electrode connect filter capacitor (C respectively
o) an end and load (R
o) an end, the 3rd switching tube (S
3) drain electrode connect the second diode (D
2) negative electrode, the second diode (D
2) anode connect storage battery (V respectively
b) positive pole and the 3rd diode (D
3) negative electrode, input source (V
In) negative pole connect storage battery (V respectively
b) negative pole, the first diode (D
1) anode, filter capacitor (C
o) the other end and load (R
o) the other end;
Said input source (V
In), storage battery (V
b) and load (R
o) respectively as a port in three ports.
3. a single magnetic core three-port DC converter is characterized in that: comprise input source (V
In), storage battery (V
b), first to the 3rd switching tube (S
1, S
2, S
3), first to the 3rd diode (D
1, D
2, D
3), filter capacitor (C
o) and filter inductance (L
o), wherein: the first diode (D
1) anode connect input source (V
In) positive pole, the first diode (D
1) negative electrode connect the 3rd switching tube (S respectively
3) source electrode, filter inductance (L
o) an end and the second diode (D
2) negative electrode, the second diode (D
2) anode connect filter capacitor (C respectively
o) an end and load (R
o) an end, the 3rd switching tube (S
3) drain electrode connect storage battery (V respectively
b) positive pole and second switch pipe (S
2) source electrode, second switch pipe (S
2) drain electrode connect the 3rd diode (D
3) negative electrode, the 3rd diode (D
3) anode connect the first switching tube (S respectively
1) drain electrode, filter inductance (L
o) the other end, filter capacitor (C
o) the other end and load (R
o) the other end, input source (V
In) negative pole connect storage battery (V respectively
b) the negative pole and the first switching tube (S
1) source electrode;
Said input source (V
In), storage battery (V
b) and load (R
o) respectively as a port in three ports.
4. a single magnetic core three-port DC converter is characterized in that: comprise input source (V
In), storage battery (V
b), first to the 3rd switching tube (S
1, S
2, S
3), first to the 3rd diode (D
1, D
2, D
3), transformer (T) and filter capacitor (C
o), said transformer (T) comprises former limit winding (N
P) and secondary winding (N
S), wherein: the first diode (D
1) anode connect input source (V
In) positive pole, the first diode (D
1) negative electrode connect the 3rd switching tube (S respectively
3) source electrode and former limit winding (N
P) end of the same name, the 3rd switching tube (S
3) drain electrode connect storage battery (V respectively
b) positive pole and second switch pipe (S
2) source electrode, second switch pipe (S
2) drain electrode connect the 3rd diode (D
3) negative electrode, the 3rd diode (D
3) anode connect former limit winding (N respectively
P) the non-same polarity and the first switching tube (S
1) drain electrode, input source (V
In) negative pole connect storage battery (V respectively
b) the negative pole and the first switching tube (S
1) source electrode, secondary winding (N
S) non-same polarity connect the second diode (D
2) anode, the second diode (D
2) negative electrode connect filter capacitor (C respectively
o) an end and load (R
o) an end, secondary winding (N
S) end of the same name connect filter capacitor (C respectively
o) the other end and load (R
o) the other end;
Said input source (V
In), storage battery (V
b) and load (R
o) respectively as a port in three ports.
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|---|---|---|---|
| CN 201010592406 CN102035382B (en) | 2010-12-17 | 2010-12-17 | Single-magnetic core three-port direct current (DC) converters |
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| CN105978325B (en) * | 2016-06-17 | 2018-03-27 | 华中科技大学 | Non-isolation type single magnetic core three-port DC converter |
| CN106936315A (en) * | 2017-04-28 | 2017-07-07 | 华南理工大学 | Towards the quasi- Z sources multiport DC/DC converters of new energy resources system |
| CN108092512B (en) * | 2017-12-11 | 2020-06-09 | 三峡大学 | Multi-working-condition high-gain multi-port DC/DC converter |
| CN108233713B (en) * | 2018-03-14 | 2019-07-09 | 福州大学 | A kind of non-isolated three-port DC switch converters and its control method |
| CN109245589B (en) * | 2018-10-10 | 2022-06-24 | 青岛大学 | Single-stage three-phase high-gain boost type three-port integrated inverter |
| CN109245590B (en) * | 2018-10-10 | 2022-06-24 | 青岛大学 | Single-stage single-phase high-gain boost type three-port integrated inverter |
| CN110445378A (en) * | 2019-07-04 | 2019-11-12 | 常熟理工学院 | A kind of three port DC/DC converters and its control method based on three inductance |
| CN110445375B (en) * | 2019-08-14 | 2021-05-04 | 哈尔滨理工大学 | Three-port DC/DC converter for high-power charging |
| CN110855144B (en) * | 2019-11-19 | 2021-03-23 | 西南交通大学 | Non-isolated three-port direct current converter and control method and circuit thereof |
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| CN101197540A (en) * | 2007-12-11 | 2008-06-11 | 艾默生网络能源有限公司 | Dc converter |
| CN101860218A (en) * | 2010-04-26 | 2010-10-13 | 南京航空航天大学 | Three-port DC converter |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101197540A (en) * | 2007-12-11 | 2008-06-11 | 艾默生网络能源有限公司 | Dc converter |
| CN101860218A (en) * | 2010-04-26 | 2010-10-13 | 南京航空航天大学 | Three-port DC converter |
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