CN205945524U - DC DC converter based on half -bridge contravariant - Google Patents
DC DC converter based on half -bridge contravariant Download PDFInfo
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- CN205945524U CN205945524U CN201620824855.0U CN201620824855U CN205945524U CN 205945524 U CN205945524 U CN 205945524U CN 201620824855 U CN201620824855 U CN 201620824855U CN 205945524 U CN205945524 U CN 205945524U
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Abstract
The utility model discloses DC DC converter based on half -bridge contravariant, including an inverter circuit, the 2nd inverter circuit, the 3rd inverter circuit and rectifier circuit, include transformer and rectifier circuit in addition, an inverter circuit, the 2nd inverter circuit, the 3rd inverter circuit's input termination DC power supply, its output establish ties and are in the same place and insert the former limit of transformer, and a rectifier circuit is connected on the vice limit of transformer, is the DC voltage with the alternating voltage transform, accomplish DC DC power conversion.
Description
Technical field
The utility model is related to Technics of Power Electronic Conversion technical field, in particular it relates to a kind of DC-DC based on semi-bridge inversion
Converter.
Background technology
DC-DC power converter is a kind of device for converting electric energy, and a kind of direct current with specific voltage is changed into tool
There is the direct current of another kind of specific voltage.Traditional DC-DC conversion circuit has Buck circuit, Boost circuit, Buck-Boost electricity
The non-isolation type circuit such as road, Cuk circuit, and the isolated form such as forward converter, circuit of reversed excitation, half-bridge circuit and full-bridge circuit electricity
Road.
Find through the retrieval to prior art, the research to DC-DC converter at present is concentrated mainly on Buck, Boost
Deng on circuit and bidirectional DC-DC converter.Lin Weiming et al. was in 2012《Proceedings of the CSEE》On propose one
Plant the two-way large velocity ratio DC-DC switch converters changing one circle control strategy, coupling inductance is introduced non-isolated by this converter
It is achieved that the lifting of input and output voltage large velocity ratio and efficiency, this converter also achieves effective control to bidirectional DC-DC converter
With the dynamic response capability improving load；A kind of band isolation transformation is proposed in army's utility model patent disclosed in 2012
The multilevel photovoltaic grid-connected inverter of device T1, by preposition DC-DC converter, High ireguency SPWM modulation circuit, isolating transformer T1, whole
Stream unit and filter unit composition, decrease the loss of switching device, have reached very high conversion efficiency.
In sum, the exploration to DC-DC voltage changer is a lot of at present, but structure and control strategy are often very multiple
Miscellaneous, and the ability that multivoltage is entered with line translation is slightly not enough.
With the popularization of practical application, design one kind and multiple DC voltages can be entered with line translation, isolation input output end
And output voltage adjustable DC-DC power converter becomes a direction being worth research.
Utility model content
The defect existing for prior art, the utility model provides a kind of DC-DC converter based on semi-bridge inversion.
DC-DC converter based on semi-bridge inversion described in the utility model, including the first inverter circuit, the second inversion electricity
Road, the 3rd inverter circuit and rectification circuit, additionally include transformer and rectification circuit；Described first inverter circuit, second inverse
Become the input termination dc source of circuit, the 3rd inverter circuit, its output end is cascaded and accesses the former limit of transformer,
Transformer secondary connects a rectification circuit, alternating voltage is transformed to DC voltage, completes DC-DC power converter.
Further, described dc source includes the first dc source, the second dc source, the 3rd dc source.
Further, described first inverter circuit includes：First electrochemical capacitor, the second electrochemical capacitor, first against conductivity type switch
With second against conductivity type switch, the positive pole of the first electrochemical capacitor connects the first dc source and the first drain electrode switching against conductivity type, the
The positive pole of two electrochemical capacitors connects the negative pole of the first electrochemical capacitor, and the negative pole of the second electrochemical capacitor connects the negative of the first dc source
Pole, the second source electrode switching against conductivity type against the drain electrode connection first of conductivity type switch, second connects second against the source electrode that conductivity type switchs
The negative pole of electrochemical capacitor；
Further, the second inverter circuit includes：3rd electrochemical capacitor, the 4th electrochemical capacitor, the 3rd against conductivity type switch and the
Four connect the second dc source and the 3rd drain electrode switching against conductivity type, the 4th electrolysis against conductivity type switch, the positive pole of the 3rd electrochemical capacitor
The positive pole of electric capacity connects the negative pole of the 3rd electrochemical capacitor, and the negative pole of the 4th electrochemical capacitor connects the negative pole of the second dc source, the
Four connect the 3rd source electrodes switching against conductivity type against draining of conductivity type switch, and the 4th connects the 4th against the source electrode that conductivity type switchs is electrolysed electricity
The negative pole holding；
Further, the 3rd inverter circuit includes：5th electrochemical capacitor, the 6th electrochemical capacitor, the 5th against conductivity type switch and the
Six connect the 3rd dc source and the 5th drain electrode switching against conductivity type against conductivity type switch, the positive pole of described 5th electrochemical capacitor, the
The positive pole of six electrochemical capacitors connects the negative pole of the 5th electrochemical capacitor, and the negative pole of the 6th electrochemical capacitor connects the negative of the 3rd dc source
Pole, the 6th source electrode switching against conductivity type against the drain electrode connection the 5th of conductivity type switch, the 6th connects the 6th against the source electrode that conductivity type switchs
The negative pole of electrochemical capacitor.
Further, described first against conductivity type switch and second against the tie point of conductivity type switch and transformer primary side Same Name of Ends phase
Even, the tie point of the first electrochemical capacitor and the second electrochemical capacitor and the 3rd is against conductivity type switch and the 4th against the tie point of conductivity type switch
It is connected；The tie point of the 3rd electrochemical capacitor and the 4th electrochemical capacitor and the 5th is against conductivity type switch and the 6th against the connection of conductivity type switch
Point is connected, and the tie point of the 5th electrochemical capacitor and the 6th electrochemical capacitor is connected with transformer primary side different name end.
Further, described rectification circuit include the first diode, the second diode, the 3rd diode, the 4th diode,
Seven electrochemical capacitors and resistance, the anode of described first diode and the negative electrode phase of transformer secondary Same Name of Ends and the second diode
Even, the negative electrode of the negative electrode of the first diode and the 3rd diode, the positive pole of the 7th electrochemical capacitor, one end of resistance are connected, and the 4th
The negative electrode of diode is connected with the anode of the 3rd diode, transformer secondary different name end, the anode and the two or two of the 4th diode
The anode of pole pipe, the negative pole of the 7th electrochemical capacitor, the other end of resistance are connected.
Further, described first against conductivity type switch, second against conductivity type switch, the 3rd against conductivity type switch, the 4th open against conductivity type
Close, the 5th against conductivity type switch, the 6th against conductivity type switch parameter consistent.
Compared with prior art, the utility model has following beneficial effect：
1st, carry out lifting press operation using transformer T1, isolated input/output terminal simultaneously, increased security.
2nd, multiple DC voltages can be converted into a DC voltage, Simultaneous Switching device reduces, reduce manufacturing cost and
Fault rate.
3rd, circuit topology and control strategy simple it is easy to popularization and application.
Brief description
Fig. 1 is the circuit theory diagrams of embodiment described in the utility model.
Fig. 2 is each inverse conductivity type switch gate pulse signals sequential chart and primary voltage of transformer oscillogram.
Specific embodiment
With reference to specific embodiment, the utility model is described in detail.Following examples will be helpful to this area
Technical staff further understands the utility model, but does not limit the utility model in any form.It should be pointed out that to ability
For the those of ordinary skill in domain, without departing from the concept of the premise utility, some changes and improvements can also be made.
These broadly fall into protection domain of the present utility model.
The utility model includes three inverter circuits, rectification circuit 5, and the input of three inverter circuits is respectively connected to direct current
Voltage, its output end is cascaded, by the break-make of controlling switch pipe by multiple DC voltage inversions be alternating voltage, and
And access transformer T1 former limit, carry out buck conversion, secondary connects a rectification circuit 5, and alternating voltage is transformed to direct current
Voltage, completes DC-DC power converter.Specific embodiment mode is to include first based on the DC-DC converter of semi-bridge inversion inverse
Become circuit 1, the second inverter circuit 2, the 3rd inverter circuit 3 and rectification circuit 5, it is characterized in that, also include transformer T1 and rectification
Circuit 5；Described first inverter circuit 1, the second inverter circuit 2, the input termination dc source of the 3rd inverter circuit 3, its output
End is cascaded and accesses the former limit of transformer T1, and transformer T1 secondary connects a rectification circuit 5, by alternating current buckling
It is changed to DC voltage, complete DC-DC power converter.
Dc source described in the present embodiment includes the first dc source U1, the second dc source U2, the 3rd dc source U3.
Described in the present embodiment, the first inverter circuit 1 includes：First electrochemical capacitor E1, the second electrochemical capacitor E2, first inverse lead
Type switch S1 and second switchs S2 against conductivity type, and the positive pole of the first electrochemical capacitor E1 connects the first dc source U1 and first against conductivity type
The drain electrode of switch S1, the positive pole of the second electrochemical capacitor E2 connects the negative pole of the first electrochemical capacitor E1, and the second electrochemical capacitor E2's is negative
Pole connects the negative pole of the first dc source U1, and the second drain electrode switching S2 against conductivity type connects the first source electrode switching S1 against conductivity type,
Second source electrode switching S2 against conductivity type connects the negative pole of the second electrochemical capacitor E2；
Described in the present embodiment, the second inverter circuit 2 includes：3rd electrochemical capacitor E3, the 4th electrochemical capacitor E4, the 3rd inverse lead
Type switch S3 and the 4th switchs S4 against conductivity type, and the positive pole of the 3rd electrochemical capacitor E3 meets the second dc source U2 and the 3rd and opens against conductivity type
Close the drain electrode of S3, the positive pole of the 4th electrochemical capacitor E4 connects the negative pole of the 3rd electrochemical capacitor E3, the negative pole of the 4th electrochemical capacitor E4
Connect the negative pole of the second dc source U2, the 4th drain electrode switching S4 against conductivity type connects the 3rd source electrode switching S3 against conductivity type, the
Four source electrodes switching S4 against conductivity type connect the negative pole of the 4th electrochemical capacitor E4；
Described in the present embodiment, the 3rd inverter circuit 3 includes：5th electrochemical capacitor E5, the 6th electrochemical capacitor E6, the 5th inverse lead
Type switch S5 and the 6th switchs S6 against conductivity type, and the positive pole of described 5th electrochemical capacitor E5 connects the 3rd dc source U3 and the 5th inverse
Conductivity type switchs the drain electrode of S5, and the positive pole of the 6th electrochemical capacitor E6 connects the negative pole of the 5th electrochemical capacitor E5, the 6th electrochemical capacitor E6
Negative pole connect the 3rd dc source U3 negative pole, the 6th against conductivity type switch S6 drain electrode connect the 5th against conductivity type switch S5 source
Pole, the 6th source electrode switching S6 against conductivity type connects the negative pole of the 6th electrochemical capacitor E6.
Described in the present embodiment, first switchs, against conductivity type, tie point and the transformer T1 former limit that S1 and second switchs S2 against conductivity type
Same Name of Ends is connected, and the tie point of the first electrochemical capacitor E1 and the second electrochemical capacitor E2 is led against conductivity type switch S3 and the 4th is inverse with the 3rd
The tie point that type switchs S4 is connected；The tie point of the 3rd electrochemical capacitor E3 and the 4th electrochemical capacitor E4 and the 5th switchs S5 against conductivity type
The tie point switching S6 against conductivity type with the 6th is connected, the tie point of the 5th electrochemical capacitor E5 and the 6th electrochemical capacitor E6 and transformer
T1 former limit different name end is connected.
Rectification circuit 5 described in the present embodiment include the first diode D1, the second diode D2, the 3rd diode D3, the 4th
Diode D4, the 7th electrochemical capacitor E7 and resistance R1, the anode of described first diode D1 and transformer T1 secondary Same Name of Ends and
The negative electrode of the second diode D2 is connected, the negative electrode of the first diode D1 and the negative electrode of the 3rd diode D3, the 7th electrochemical capacitor E7
Positive pole, resistance R1 one end be connected, the negative electrode of the 4th diode D4 is different with the anode of the 3rd diode D3, transformer T1 secondary
Name end is connected, the anode of the anode of the 4th diode D4 and the second diode D2, the negative pole of the 7th electrochemical capacitor E7, resistance R1
The other end is connected.
Described in the present embodiment first against conductivity type switch S1, second against conductivity type switch S2, the 3rd against conductivity type switch S3, the 4th inverse
Conductivity type switch S4, the 5th against conductivity type switch S5, the 6th against conductivity type switch S6 parameter consistent.
The type selecting of each components and parts above-mentioned in this example：
First, second, third dc source U1, U2, U3：120V.
First, second, third, fourthth, the five, the 6th electrochemical capacitor E1, E2, E3, E4, E5, E6：680 μ F, 200V, use
In partial pressure and voltage stabilizing.
First, second, third, fourthth, the five, the 6th S1, S2, S3, S4, S5, S6 are switched against conductivity type：IGBT,30A/100
℃.
First, second, third, fourth diode D1, D2, D3, D4：600V, 30A/100 DEG C, for rectification.
Transformer T1 no-load voltage ratio is made by oneself：Such as 1:1.
7th electrochemical capacitor E7：400V, 680 μ F, for voltage stabilizing.
Resistance R1：200k Ω, 2W.
Utility model works flow process, in three inverter circuits, two electrochemical capacitors of each inverter circuit are to corresponding input
The input DC voltage of dc source carries out partial pressure, then carries out inversion by controlling switch pipe.Three inverter circuits are defeated
Go out end series connection, control each inverter circuit against the time turning on and off of conductivity type switching device；As shown in S1-S6 in Fig. 2,
S1-S6 can go out the multistage alternating voltage of similar sinusoidal voltage with inversion.As shown in the T1 in Fig. 2, this alternating voltage accesses transformation
Device T1 carries out buck conversion, the alternating voltage after the secondary exporting change of T1, then accesses and carry out rectification, filter in rectification circuit 5
Ripple and voltage stabilizing, can obtain the DC voltage with certain stability.
The utility model is applicable to need carry out DC-DC conversion to multiple DC voltages and needs between input and output
The occasion of electrical isolation.The utility model circuit topology is simple, and control strategy is simple, and switching tube consumption is few, with low cost, output
Voltage adjustable extent is big, has good using value.
Above specific embodiment of the utility model is described.It is to be appreciated that the utility model not office
It is limited to above-mentioned particular implementation, those skilled in the art can make a variety of changes within the scope of the claims or change,
This has no effect on flesh and blood of the present utility model.Spy in the case of not conflicting, in embodiments herein and embodiment
Levy and can arbitrarily be mutually combined.
Claims (8)
1. the DC-DC converter based on semi-bridge inversion, including the first inverter circuit, the second inverter circuit, the 3rd inverter circuit and
Rectification circuit, is characterized in that, also includes transformer and rectification circuit；Described first inverter circuit, the second inverter circuit, the 3rd inverse
Become the input termination dc source of circuit, its output end is cascaded and accesses the former limit of transformer, and transformer secondary is even
Connect a rectification circuit, alternating voltage is transformed to DC voltage, complete DC-DC power converter.
2. the DC-DC converter based on semi-bridge inversion as claimed in claim 1, is characterized in that：Described dc source includes
One dc source, the second dc source, the 3rd dc source.
3. the DC-DC converter based on semi-bridge inversion as claimed in claim 2, is characterized in that：Described first inverter circuit bag
Include：First electrochemical capacitor, the second electrochemical capacitor, first against conductivity type switch and second against conductivity type switch, the first electrochemical capacitor is just
Pole connects the first dc source and the first drain electrode switching against conductivity type, and the positive pole of the second electrochemical capacitor connects the first electrochemical capacitor
Negative pole, the negative pole of the second electrochemical capacitor connects the negative pole of the first dc source, and second is inverse against the drain electrode connection first of conductivity type switch
The source electrode of conductivity type switch, second connects the negative pole of the second electrochemical capacitor against the source electrode that conductivity type switchs.
4. the DC-DC converter based on semi-bridge inversion as claimed in claim 3, is characterized in that：Second inverter circuit includes：The
Three electrochemical capacitors, the 4th electrochemical capacitor, the 3rd against conductivity type switch and the 4th against conductivity type switch, the positive pole of the 3rd electrochemical capacitor connects the
Two dc sources and the 3rd drain electrode switching against conductivity type, the positive pole of the 4th electrochemical capacitor connects the negative pole of the 3rd electrochemical capacitor, the
The negative pole of four electrochemical capacitors connects the negative pole of the second dc source, and the 4th connects the 3rd against conductivity type switch against the drain electrode that conductivity type switchs
Source electrode, the 4th against conductivity type switch source electrode connect the 4th electrochemical capacitor negative pole.
5. the DC-DC converter based on semi-bridge inversion as claimed in claim 4, is characterized in that：3rd inverter circuit includes：The
Five electrochemical capacitors, the 6th electrochemical capacitor, the 5th against conductivity type switch and the 6th against conductivity type switch, the positive pole of described 5th electrochemical capacitor
Connect the 3rd dc source and the 5th drain electrode switching against conductivity type, the positive pole of the 6th electrochemical capacitor connects the negative of the 5th electrochemical capacitor
Pole, the negative pole of the 6th electrochemical capacitor connects the negative pole of the 3rd dc source, and the 6th connects the 5th and inverse lead against the drain electrode of conductivity type switch
The source electrode of type switch, the 6th connects the negative pole of the 6th electrochemical capacitor against the source electrode that conductivity type switchs.
6. the DC-DC converter based on semi-bridge inversion as claimed in claim 5, is characterized in that：Described first against conductivity type switch
The tie point switching against conductivity type with second is connected with transformer primary side Same Name of Ends, the company of the first electrochemical capacitor and the second electrochemical capacitor
Contact is connected against the tie point of conductivity type switch against conductivity type switch and the 4th with the 3rd；3rd electrochemical capacitor and the 4th electrochemical capacitor
Tie point is connected against conductivity type switch and the 6th tie point switching against conductivity type with the 5th, the 5th electrochemical capacitor and the 6th electrochemical capacitor
Tie point be connected with transformer primary side different name end.
7. the DC-DC converter based on semi-bridge inversion as claimed in claim 1, is characterized in that：Described rectification circuit includes
One diode, the second diode, the 3rd diode, the 4th diode, the 7th electrochemical capacitor and resistance, described first diode
Anode is connected with the negative electrode of transformer secondary Same Name of Ends and the second diode, the moon of the negative electrode of the first diode and the 3rd diode
Pole, the positive pole of the 7th electrochemical capacitor, one end of resistance are connected, the negative electrode of the 4th diode and the anode of the 3rd diode, transformation
Device secondary different name end is connected, the anode of the 4th diode and the anode of the second diode, the negative pole of the 7th electrochemical capacitor, resistance
The other end is connected.
8. the DC-DC converter based on semi-bridge inversion as claimed in claim 5, is characterized in that：Described first against conductivity type switch,
Second against conductivity type switch, the 3rd against conductivity type switch, the 4th against conductivity type switch, the 5th against conductivity type switch, the 6th against conductivity type switch
Parameter is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620824855.0U CN205945524U (en) | 2016-07-29 | 2016-07-29 | DC DC converter based on half -bridge contravariant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620824855.0U CN205945524U (en) | 2016-07-29 | 2016-07-29 | DC DC converter based on half -bridge contravariant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108407668A (en) * | 2018-01-29 | 2018-08-17 | 新日(无锡)发展有限公司 | A kind of power supply system for electric vehicle |
| CN109039081A (en) * | 2018-06-20 | 2018-12-18 | 中国科学院电工研究所 | Electric power electric transformer, two-way DC converter and its control method |
| CN110011544A (en) * | 2019-05-14 | 2019-07-12 | 江苏师范大学 | A kind of multiport input source isolated form Z DC converter |
| CN112994466A (en) * | 2021-02-23 | 2021-06-18 | 浙江大学 | Converter with wide voltage regulation range |
-
2016
- 2016-07-29 CN CN201620824855.0U patent/CN205945524U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108407668A (en) * | 2018-01-29 | 2018-08-17 | 新日(无锡)发展有限公司 | A kind of power supply system for electric vehicle |
| CN109039081A (en) * | 2018-06-20 | 2018-12-18 | 中国科学院电工研究所 | Electric power electric transformer, two-way DC converter and its control method |
| CN110011544A (en) * | 2019-05-14 | 2019-07-12 | 江苏师范大学 | A kind of multiport input source isolated form Z DC converter |
| CN112994466A (en) * | 2021-02-23 | 2021-06-18 | 浙江大学 | Converter with wide voltage regulation range |
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