CN102064705A - Current-source-type multi-input full-bridge converter with single primary winding - Google Patents
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Abstract
The invention discloses a current-source-type multi-input full-bridge converter with a single primary winding, belonging to the field of power electronic converters. The converter comprises N input channel circuits, a full-bridge converter circuit (20) and an output rectifier circuit (30), wherein N is a natural number larger than 1, each input channel circuit comprises a DC power source, an inductors, a switching tube and a diode, the cathodes of all the diodes in the N input channel circuits are connected, the cathodes of all the DC power sources are connected, the full-bridge converter circuit (20) comprises four full-bridge switching tubes and one transformer, and the output rectifier circuit (30) comprises a full-bridge rectifier circuit and a filtration capacitor. The transformer of the converter provided by the invention is provided with only one winding and 4+N switching tubes so that small converter size and simple structure are achieved. When the switching tubes in the input channels are simultaneously switched off, the DC power sources are connected in parallel to supply power to the loads so that a plurality of input sources supply power to the loads simultaneously or in shared time.
Description
Technical field
Winding current source, the former limit of a kind of list type that the present invention relates in the power inverter is imported full-bridge converter more, belongs to the converters field.
Background technology
Along with the continuous aggravation of the continuous in short supply and environmental pollution of fossil energy, the development and use of new and renewable sources of energy obtain concern more and more widely, and distributed generation system has become the research focus, and straight convertor is one of them important component part.And new and renewable sources of energy, as: solar energy, wind energy etc., its difference with weather and area changes greatly, supply of electric power instability, discontinuous, in addition, therefore fuel cell output voltage changes with the variation of load, in order to ensure powering load reliably continuously, needs multiple new forms of energy to have complementary advantages and constitutes the associating electric power system.
Owing in the system a plurality of input sources are arranged, the voltage of every kind of input source is also unstable, so need straight convertor that voltage is regulated.Straight convertor can be divided into two classes by the input source number: single input straight convertor and many input straight convertors.Owing to have only an input source, therefore only adopt single input straight convertor, and new forms of energy associating electric power system there are a plurality of input sources, therefore, both can adopt a plurality of single input straight convertors, also can adopt the straight convertor of input more than in most of occasions.In some middle low powers and the close occasion of input generation of electricity by new energy device, as use a plurality of single input straight convertors, will make structure become complicated, and cost is higher.In this application scenario,, can replace a plurality of single input straight convertors with the straight convertor of input more than in order to simplify circuit structure.
In the high-power applications occasion that needs are isolated, full-bridge converter is because its characteristic of simple structure is widely used.Existing many input full-bridge converters can utilize the magnetic flux coupling to realize many inputs, but the former limit of this converter number of windings is identical with the input source number, and the switching tube number of devices is many, complex structure and cost height, and control method is more single.
Summary of the invention
The present invention is directed to the defective that prior art exists, import full-bridge converter more and propose winding current source, the former limit of a kind of list type.
This converter is made up of N input channel circuit, full-bridge converter circuit and output rectification circuit, and N is the natural number greater than 1, wherein:
Each input channel circuit all is made up of DC source, inductance, switching tube and diode, the positive pole of DC source connects an end of inductance, the other end of inductance connects the drain electrode of switching tube and the anode of diode respectively, the source electrode of switching tube connects the negative pole of DC source, the negative electrode of the diode in N input channel circuit interconnects, and the negative pole of the DC source in N input channel circuit interconnects;
The full-bridge converter circuit is made up of four full-bridge switch pipes and transformer, first links to each other with the drain electrode of the 3rd full-bridge switch pipe and is connected the tie point of N the diode cathode in the input channel circuit, second links to each other with the source electrode of the 4th full-bridge switch pipe and is connected the tie point of N the DC source negative pole in the input channel circuit, the source electrode of the first full-bridge switch pipe connects the drain electrode of the second full-bridge switch pipe and the end of the same name of the former limit of transformer winding respectively, and the source electrode of the 3rd full-bridge switch pipe connects the drain electrode of the 4th full-bridge switch pipe and the different name end of the former limit of transformer winding respectively;
Output rectification circuit is made up of four rectifier diodes and filter capacitor, the anode of first rectifier diode connects the negative electrode of second rectifier diode and the end of the same name of transformer secondary winding respectively, the anode of the 3rd rectifier diode connects the negative electrode of the 4th rectifier diode and the different name end of transformer secondary winding respectively, the negative electrode of first rectifier diode connects the negative electrode of the 3rd rectifier diode respectively, one end of filter capacitor and an end of load, the anode of second rectifier diode connects the anode of the 4th rectifier diode respectively, the other end of filter capacitor and the other end of load.
The present invention has following technique effect:
(1) under the condition that input and output realize to be isolated, reduced the number of windings of input side, simplified the design of transformer, and then reduced the volume of converter;
(2) reduce the quantity of converter switches pipe, simplified circuit structure;
(3) the input electric current is continuous, and it is less to pulse, a plurality of input sources can be simultaneously or timesharing power to the load, increased the control strategy of converter greatly, make the control variation.
Description of drawings
Fig. 1 is the circuit structure schematic diagram of converter of the present invention.
The equivalent circuit theory figure of each switch mode of converter of the present invention when Fig. 2～Fig. 9 is dual input.
1,2, N is the numbering of input channel circuit designation in the above accompanying drawing:; 20 is the full-bridge converter circuit; 30 is output rectification circuit; V
In1,2...N, L
1,2...N, Q
1,2...N, D
1,2...NBe respectively DC source, inductance, switching tube, diode in the input channel circuit; Q
M1～Q
M4Be respectively first to fourth full-bridge switch pipe; W
1, W
2Be respectively the former limit and the secondary winding of transformer; D
R1～D
R4Be respectively first to fourth rectifier diode; C
fBe filter capacitor; R
LBe load; V
oOutput voltage for converter.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
The present invention introduces pulse current source unit (Pulsating Current Source Cell, PCSC) notion, with the directly input of alternative full-bridge converter of Boost type PCSC (input channel) back in parallel, constitute winding current source, single former limit type and import full-bridge converter more.
As shown in Figure 1, the circuit structure of converter of the present invention is by N input channel circuit, full-bridge converter circuit 20 and output rectification circuit 30 are formed, N is the natural number greater than 1, wherein: each input channel circuit all is by DC source, inductance, switching tube and diode are formed, the positive pole of DC source connects an end of inductance, the other end of inductance connects the drain electrode of switching tube and the anode of diode respectively, the source electrode of switching tube connects the negative pole of DC source, the negative electrode of the diode in N input channel circuit is interconnected to constitute the positive input terminal of N input channel circuit, and the negative pole of the DC source in N input channel circuit is interconnected to constitute the negative input end of N input channel circuit; Full-bridge converter circuit 20 is by four full-bridge switch pipe Q
M1～Q
M4Form with transformer, transformer comprises the former limit of transformer winding W
1With transformer secondary winding W
2, the first and the 3rd full-bridge switch pipe Q
M1, Q
M3Drain electrode link to each other and connect the tie point of the diode cathode in N the input channel circuit, the second and the 4th full-bridge switch pipe Q
M2, Q
M4Source electrode link to each other and connect the tie point of the DC source negative pole in N the input channel circuit, the first full-bridge switch pipe Q
M1Source electrode connect the second full-bridge switch pipe Q respectively
M2Drain electrode and the former limit of transformer winding W
1End of the same name, the 3rd full-bridge switch pipe Q
M3Source electrode connect the 4th full-bridge switch pipe Q respectively
M4Drain electrode and the former limit of transformer winding W
1The different name end; Output rectification circuit 30 is by four rectifier diode D
R1～D
R4With filter capacitor C
fForm four rectifier diode D
R1～D
R4Form the full bridge rectifier structure, the first rectifier diode D
R1Anode connect the second rectifier diode D respectively
R2Negative electrode and transformer secondary winding W
2End of the same name, the 3rd rectifier diode D
R3Anode connect the 4th rectifier diode D respectively
R4Negative electrode and transformer secondary winding W
2The different name end, the first rectifier diode D
R1Negative electrode connect the 3rd rectifier diode D respectively
R3Negative electrode, filter capacitor C
fAn end and load R
LAn end, the second rectifier diode D
R2Anode connect the 4th rectifier diode D respectively
R4Anode, filter capacitor C
fThe other end and load R
LThe other end.
Among input channel circuit 1～N, DC source and inductance constitute pulse current source, D
1,2...NBe blocking diode; In the full-bridge converter circuit 20, full-bridge switch pipe Q
M1With Q
M4The brachium pontis of forming complementary conducting, full-bridge switch pipe Q
M2With Q
M3The brachium pontis of forming complementary conducting; Switching tube Q in N input channel circuit
1,2...NThe voltage stress maximum be nV
o, four full-bridge switch pipe Q in the full-bridge converter circuit 20
M1～Q
M4The voltage stress maximum also be nV
o, n is that the former secondary umber of turn of transformer is than (n=W
1: W
2), V
oOutput voltage for this converter.
Be example with the dual input below, and the operation principle of converter of the present invention made a concrete analysis of in conjunction with Fig. 2～Fig. 9.
Made the following assumptions earlier before analyzing: 1. all switching tubes and diode are desirable device, do not consider switching time, conduction voltage drop; 2. all inductance, electric capacity and transformer are ideal element.
According to switching tube Q
1, Q
2And Q
M1～Q
M4On off state, converter can be divided into following eight kinds of operation modes.
1. switch mode I[as shown in Figure 2]
Under this mode, input channel 1 is powered separately, the inductance L of input channel 2
2The charging energy storage.Switching tube Q
2, Q
M1, Q
M4Open-minded, diode D
1, D
R1, D
R4Conducting, switching tube Q
1, Q
M2, Q
M3Turn-off diode D
2, D
R2, D
R3Instead end partially.DC source V
In1Voltage pass through inductance L
1Be added in the former limit of transformer winding W
1On, inductance L
1Electric current is linear to rise secondary winding W
2End of the same name passes through capacitor C again for just
fLoad R is given in filtering
LPower supply.Simultaneously, DC source V
In2Voltage be added in inductance L
2Two ends, inductance L
2Energy storage.
2. switch mode II[as shown in Figure 3]
Under this mode, input channel 1 is powered separately, the inductance L of input channel 2
2The charging energy storage.Switching tube Q
2, Q
M2, Q
M3Open-minded, diode D
1, D
R2, D
R3Conducting, switching tube Q
1, Q
M1, Q
M4Turn-off diode D
2, D
R1, D
R4Instead end partially.DC source V
In1Voltage pass through inductance L
1Be added in the former limit of transformer winding W
1On, inductance L
1Electric current is linear to rise secondary winding W
2End of the same name passes through capacitor C again for negative
fLoad R is given in filtering
LPower supply.Simultaneously, DC source V
In2Voltage be added in inductance L
2Two ends, inductance L
2Energy storage.
3. switch mode III[as shown in Figure 4]
Under this mode, input channel 2 is powered separately, the inductance L of input channel 1
1The charging energy storage.Switching tube Q
1, Q
M1, Q
M4Open-minded, diode D
2, D
R1, D
R4Conducting, switching tube Q
2, Q
M2, Q
M3Turn-off diode D
1, D
R2, D
R3Instead end partially.DC source V
In2Voltage pass through inductance L
2Be added in the former limit of transformer winding W
1On, inductance L
2Electric current is linear to rise secondary winding W
2End of the same name passes through capacitor C again for just
fLoad R is given in filtering
LPower supply.Simultaneously, DC source V
In1Voltage be added in inductance L
1Two ends, inductance L
1Energy storage.
4. switch mode IV[as shown in Figure 5]
Under this mode, input channel 2 is powered separately, the inductance L of input channel 1
1The charging energy storage.Switching tube Q
1, Q
M2, Q
M3Open-minded, diode D
2, D
R2, D
R3Conducting, switching tube Q
2, Q
M1, Q
M4Turn-off diode D
1, D
R1, D
R4Instead end partially.DC source V
In2Voltage pass through inductance L
2Be added in the former limit of transformer winding W
1On, inductance L
2Electric current is linear to rise secondary winding W
2End of the same name passes through capacitor C again for negative
fLoad R is given in filtering
LPower supply.Simultaneously, DC source V
In1Voltage be added in inductance L
1Two ends, inductance L
1Energy storage.
5. switch mode V[as shown in Figure 6]
Under this mode, input channel 1 and 2 is united power supply.Switching tube Q
M1, Q
M4Open-minded, diode D
1, D
2, D
R1, D
R4Conducting, switching tube Q
1, Q
2, Q
M2, Q
M3Turn-off diode D
R2, D
R3Instead end partially.DC source V
In1Voltage pass through inductance L
1Be added in the former limit of transformer winding W
1On, inductance L
1Electric current is linear to rise; DC source V
In2Voltage pass through inductance L
2Be added in the former limit of transformer winding W
1On, inductance L
2Electric current is linear to rise.Secondary winding W
2End of the same name passes through capacitor C again for just
fLoad R is given in filtering
LPower supply.
6. switch mode VI[as shown in Figure 7]
Under this mode, input channel 1 and 2 is united power supply.Switching tube Q
M2, Q
M3Open-minded, diode D
1, D
2, D
R2, D
R3Conducting, switching tube Q1, Q2, Qm1, Qm4 turn-off, and diode DR1, DR4 instead end partially.The voltage of DC source Vin1 passes through inductance L
1Be added in the former limit of transformer winding W
1On, inductance L
1Electric current is linear to rise; DC source V
In2Voltage pass through inductance L
2Be added in the former limit of transformer winding W
1On, inductance L
2Electric current is linear to rise.Secondary winding W
2End of the same name passes through capacitor C again for negative
fLoad R is given in filtering
LPower supply.
7. switch mode VII[as shown in Figure 8]
Under this mode, the inductance L of input channel 1 and input channel 2
1, L
2The charging energy storage.Switching tube Q
1, Q
2Open-minded, full-bridge switch pipe Q
M1～Q
M4All turn-off diode D
1, D
2Instead end rectifier diode D partially
R1, D
R2, D
R3, D
R4Conducting, secondary winding W
2On energy pass through D
R1, D
R2, D
R3, D
R4Load R is given in shunting
LRelease energy.
8. switch mode VIII[as shown in Figure 9]
Under this mode, the inductance L of input channel 1 and input channel 2
1, L
2The charging energy storage.Switching tube Q
1, Q
2Open-minded, full-bridge switch pipe Q
M1～Q
M4All turn-off diode D
1, D
2, D
R1, D
R2, D
R3, D
R4Instead end inductance L partially
1, L
2Middle energy stored has discharged and has finished load R
LElectric current by capacitor C
fProvide.
By above analysis as can be known, the switching tube quantity of converter of the present invention reduces greatly, the control strategy of converter also can have multiple choices, when the switching tube in N the input channel circuit turn-offs simultaneously, all DC source powering load in parallel, the transformer of this converter has only a former limit winding simultaneously, helps simplifying the design of transformer, and then reduces the volume of converter.
Claims (3)
1. winding current source, the former limit of list type is imported full-bridge converter more, it is characterized in that:
This converter is made up of N input channel circuit, full-bridge converter circuit (20) and output rectification circuit (30), and N is the natural number greater than 1, wherein:
Each input channel circuit in described N input channel circuit all is made up of DC source, inductance, switching tube and diode, the positive pole of DC source connects an end of inductance, the other end of inductance connects the drain electrode of switching tube and the anode of diode respectively, the source electrode of switching tube connects the negative pole of DC source, the negative electrode of the diode in described N input channel circuit is interconnected to constitute the positive input terminal of N input channel circuit, and the negative pole of the DC source in N input channel circuit is interconnected to constitute the negative input end of N input channel circuit;
Full-bridge converter circuit (20) is by four full-bridge switch pipe (Q
M1～Q
M4) and the transformer composition, the first and the 3rd full-bridge switch pipe (Q
M1, Q
M3) drain electrode link to each other and connect the tie point of the diode cathode in N the input channel circuit, the second and the 4th full-bridge switch pipe (Q
M2, Q
M4) source electrode link to each other and connect the tie point of the DC source negative pole in N the input channel circuit, the first full-bridge switch pipe (Q
M1) source electrode connect the second full-bridge switch pipe (Q respectively
M2) drain electrode and the former limit of transformer winding (W
1) end of the same name, the 3rd full-bridge switch pipe (Q
M3) source electrode connect the 4th full-bridge switch pipe (Q respectively
M4) drain electrode and the former limit of transformer winding (W
1) the different name end;
Output rectification circuit (30) is by four rectifier diode (D
R1～D
R4) and filter capacitor (C
f) form the first rectifier diode (D
R1) anode connect the second rectifier diode (D respectively
R2) negative electrode and transformer secondary winding (W
2) end of the same name, the 3rd rectifier diode (D
R3) anode connect the 4th rectifier diode (D respectively
R4) negative electrode and transformer secondary winding (W
2) the different name end, the first rectifier diode (D
R1) negative electrode connect the 3rd rectifier diode (D respectively
R3) negative electrode, filter capacitor (C
f) an end and load (R
L) an end, the second rectifier diode (D
R2) anode connect the 4th rectifier diode (D respectively
R4) anode, filter capacitor (C
f) the other end and load (R
L) the other end.
2. winding current source, the former limit of list according to claim 1 type is imported full-bridge converter more, it is characterized in that: the voltage stress maximum of the switching tube in described N input channel circuit is nV
o, n is the former secondary umber of turn ratio of transformer, V
oOutput voltage for this converter.
3. winding current source, the former limit of list according to claim 1 type is imported full-bridge converter more, it is characterized in that: four full-bridge switch pipe (Q in the described full-bridge converter circuit (20)
M1～Q
M4) the voltage stress maximum be nV
o, n is the former secondary umber of turn ratio of transformer, V
oOutput voltage for this converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110021086 CN102064705A (en) | 2011-01-19 | 2011-01-19 | Current-source-type multi-input full-bridge converter with single primary winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110021086 CN102064705A (en) | 2011-01-19 | 2011-01-19 | Current-source-type multi-input full-bridge converter with single primary winding |
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| Publication Number | Publication Date |
|---|---|
| CN102064705A true CN102064705A (en) | 2011-05-18 |
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103049028A (en) * | 2012-11-28 | 2013-04-17 | 华中科技大学 | Constant current source for high voltage magnetic switch resetting |
| CN103312153A (en) * | 2012-03-12 | 2013-09-18 | 南京航空航天大学 | Parallel multi input coupled inductor buck and boost converter |
| CN104917386A (en) * | 2015-07-08 | 2015-09-16 | 深圳市汇北川电子技术有限公司 | Resonance type multi-input direct-current transformer for new energy power supply |
-
2011
- 2011-01-19 CN CN 201110021086 patent/CN102064705A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 《Energy Conversion Congress and Exposition (ECCE), 2010 IEEE》 20101101 王勤等 A double-input flyback DC/DC converter with single primary winding , * |
| 《电工技术学报》 20090531 李艳等 无缓冲单元的多输入直流变换器电路拓扑 第24卷, 第5期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312153A (en) * | 2012-03-12 | 2013-09-18 | 南京航空航天大学 | Parallel multi input coupled inductor buck and boost converter |
| CN103312153B (en) * | 2012-03-12 | 2016-04-27 | 南京航空航天大学 | A kind of parallel multi input coupling inductance buck-boost converter |
| CN103049028A (en) * | 2012-11-28 | 2013-04-17 | 华中科技大学 | Constant current source for high voltage magnetic switch resetting |
| CN103049028B (en) * | 2012-11-28 | 2014-07-23 | 华中科技大学 | Constant current source for high voltage magnetic switch resetting |
| CN104917386A (en) * | 2015-07-08 | 2015-09-16 | 深圳市汇北川电子技术有限公司 | Resonance type multi-input direct-current transformer for new energy power supply |
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Application publication date: 20110518 |