CN203933404U - Isolated two-way full-bridge DC-DC converter - Google Patents
Isolated two-way full-bridge DC-DC converter Download PDFInfo
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- CN203933404U CN203933404U CN201420317088.5U CN201420317088U CN203933404U CN 203933404 U CN203933404 U CN 203933404U CN 201420317088 U CN201420317088 U CN 201420317088U CN 203933404 U CN203933404 U CN 203933404U
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Abstract
The utility model discloses a kind of isolated two-way full-bridge DC-DC converter, comprising: two identical DC circuit symmetrical of structure connect high frequency transformer both sides; DC circuit comprises: equal inverse parallel one diode between four IGBT source electrodes and drain electrode, and series connection is leaked in the first and the 3rd IGBT source, and series connection is leaked in the second and the 4th IGBT source, and an IGBT drain electrode connects the 2nd IGBT drain electrode, and the 3rd IGBT source electrode connects the 4th IGBT source electrode; The one IGBT drain electrode connects first filter inductance one end, the first filter inductance other end is as DC circuit first end and connect one end of the first electric capacity of voltage regulation, the other end of the first electric capacity of voltage regulation is as the second end of DC circuit and connect the 3rd IGBT source electrode, and the first D.C. contactor is parallel to the first filter inductance two ends; The former limit of described high frequency transformer or secondary first end connect an IGBT source electrode by the first filter capacitor, and the former limit of described high frequency transformer or secondary the second end connect the 3rd IGBT source electrode.The utility model is realized electrical isolation by high frequency transformer can improve system effectiveness minimizing system loss.
Description
Technical field
The utility model relates to power industry, particularly relates to a kind of isolated two-way full-bridge DC-DC converter.
Background technology
Along with popularizing of various distributed energies, comprise the extensive use of the new distribution type energy such as solar energy, especially, with the development of charger industry, the application of high power D C-DC becomes more and more universal, the efficiency of DC-DC converter, it is particularly important that reliabilities etc. seem.
Traditional LC serial-resonant bidirectional DC-DC converter, when load increases the weight of, the switching loss of switching tube increases, and brings the degradation of system effectiveness.
Utility model content
The technical problems to be solved in the utility model is to provide and a kind ofly by high frequency transformer, realizes electrical isolation and can improve the isolated two-way full-bridge DC-DC converter that system effectiveness reduces system loss.
For solving the problems of the technologies described above, isolated two-way full-bridge DC-DC converter of the present utility model, comprising:
Two identical DC circuit symmetrical of structure connect former limit and the secondary of a high frequency transformer;
The one DC circuit comprises: four IGBT, equal inverse parallel one diode between each IGBT source electrode and drain electrode, series connection is leaked in the first and the 3rd IGBT source, and series connection is leaked in the second and the 4th IGBT source, the one IGBT drain electrode connects the drain electrode of the 2nd IGBT, and the 3rd IGBT source electrode connects the source electrode of the 4th IGBT;
The one IGBT drain electrode connects first filter inductance one end, the other end of the first filter inductance is as the first end of described DC circuit and connect one end of the first electric capacity of voltage regulation, the other end of the first electric capacity of voltage regulation is as the second end of described DC circuit and connect the source electrode of the 3rd IGBT, and the first D.C. contactor is parallel to the first filter inductance two ends; The former limit of described high frequency transformer or secondary first end connect an IGBT source electrode by the first filter capacitor, and the former limit of described high frequency transformer or secondary the second end connect the 3rd IGBT source electrode.
Described high frequency transformer operating temperature range is-40 degrees Celsius to 120 degrees Celsius, and operating frequency range is 10khz-100khz, is preferably 10khz, 45khz and 100khz.
When the utility model is operated in charged state, the single-phase full bridge of grid side is in inverter mode, and the single-phase full bridge pulse of inversion side, in pulse blocking state, is carried out rectification by its anti-paralleled diode, is load charging.Now the D.C. contactor KM1 of net side is by reactor short circuit, and the D.C. contactor KM2 of battery side opens, and reactor and capacitor form LC low-pass filtering branch road, filtering high-frequency harmonic.Now switching tube the one IGBT S1 and the 4th IGBTS4, the 2nd IGBT S2 and the 3rd IGBT S3 are respectively in identical state, while the one IGBT S1 and the 3rd IGBT S3, the 2nd IGBT S2 and the 4th IGBT S4 be in reverse on off state, according to charging voltage, and electric current, the difference of power, the time of switch conduction in one-period, duty ratio, can complete the charging to load.
When load has energy demand feedback grid, the inverter bridge pwm pulse of grid side, in blocked styate, is operated in diode rectification state, and the D.C. contactor KM1 of net side opens, and reactor and capacitor form LC filter branch, leach high-frequency harmonic.The inverter bridge of battery side is operated in inverter mode, and the D.C. contactor KM2 of this link is closed.Bi-directional DC-DC will be given the DC side charging of module after energy content of battery conversion.
Switching tube the 5th IGBT S5 and the 8th IGBT S8, the 6th IGBT S6 and the 7th IGBT S7 are respectively in identical state, while the 5th IGBT S5 and the 7th IGBT S7, the 6th IGBT S6 and the 8th IGBT S8 be in reverse on off state, according to discharge voltage, and electric current, the difference of power, the time that is controlled at switch conduction in one-period, IGBT duty cycle of switching, can complete the electric discharge to load.
Isolated two-way full-bridge DC-DC converter of the present utility model, realizes electrical isolation by high frequency transformer, makes system obtain higher reliability, and the switching tube of inversion side and rectification side can be realized soft switch and control, and has reduced the loss of system; Utilize the leakage inductance of transformer can carry out the transmission of energy, and between the input and output of current transformer, can realize the two-way flow of energy, high frequency transformer, has replaced traditional Industrial Frequency Transformer, reduces the volume and weight of system, improves the power density of system.Can be widely used in locomotive traction, charger, renewable source of energy generation etc.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the present invention is further detailed explanation:
Fig. 1 is the structural representation of the utility model one embodiment.
Description of reference numerals
KM1, KM2 are first, second D.C. contactors
L1, L2 are first, second filter inductances
C1, C2 are first, second electric capacity of voltage regulation
C3, C4 are first, second filter capacitors
A, B are first, second DC circuit
A1 is the first end of a DC circuit
A2 is the second end of a DC circuit
B3 is the first end of the 2nd DC circuit
B4 is the second end of the 2nd DC circuit
D1～D8 is diode
T1 is high frequency transformer
S1～S8 is the first～eight IGBT
Embodiment
As shown in Figure 1, the utility model one embodiment comprises: the DC circuit A that structure is identical and the 2nd DC circuit B, a DC circuit A and symmetrical former limit and the secondary that is connected a high frequency transformer T1 of the 2nd DC circuit B;
The DC circuit A of take is example, comprise: four IGBT S1～S4, equal inverse parallel one diode D1～D4 between each IGBT S1～S4 source electrode and drain electrode, series connection is leaked in the one IGBT S1 and the 3rd IGBT S3 source, series connection is leaked in the 2nd IGBT S2 and the 4th IGBT S4 source, the one IGBT S1 drain electrode connects the drain electrode of the 2nd IGBT S2, and the 3rd IGBT S3 source electrode connects the source electrode of the 4th IGBT S4;
The one IGBT S1 drain electrode connects first filter inductance L1 one end, the other end of the first filter inductance is as the first end A1 of a DC circuit and connect one end of the first electric capacity of voltage regulation C1, the other end of the first electric capacity of voltage regulation C1 is as the second end A2 of a DC circuit and connect the source electrode of the 3rd IGBT S3, and the first D.C. contactor KM1 is parallel to the first filter inductance two ends; The former limit of described high frequency transformer T1 or secondary first end T11 connect an IGBT S1 source electrode by the first filter capacitor C3, and the former limit of described high frequency transformer T1 or secondary the second end T12 connect the 3rd IGBT S3 source electrode.
Below through the specific embodiment and the embodiment the utility model is had been described in detail, but these not form restriction of the present utility model.In the situation that not departing from the utility model principle, those skilled in the art also can make many distortion and improvement, and these also should be considered as protection range of the present utility model.
Claims (2)
1. an isolated two-way full-bridge DC-DC converter, is characterized in that, comprising:
Two identical DC circuit symmetrical of structure connect former limit and the secondary of a high frequency transformer;
The one DC circuit comprises: four IGBT, equal inverse parallel one diode between each IGBT source electrode and drain electrode, series connection is leaked in the first and the 3rd IGBT source, and series connection is leaked in the second and the 4th IGBT source, the one IGBT drain electrode connects the drain electrode of the 2nd IGBT, and the 3rd IGBT source electrode connects the source electrode of the 4th IGBT;
The one IGBT drain electrode connects first filter inductance one end, the other end of the first filter inductance is as the first end of described DC circuit and connect one end of the first electric capacity of voltage regulation, the other end of the first electric capacity of voltage regulation is as the second end of described DC circuit and connect the source electrode of the 3rd IGBT, and the first D.C. contactor is parallel to the first filter inductance two ends; The former limit of described high frequency transformer or secondary first end connect an IGBT source electrode by the first filter capacitor, and the former limit of described high frequency transformer or secondary the second end connect the 3rd IGBT source electrode.
2. isolated two-way full-bridge DC-DC converter as claimed in claim 1, is characterized in that: described high frequency transformer operating temperature range is-40 degrees Celsius to 120 degrees Celsius, and operating frequency range is 10khz-100khz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420317088.5U CN203933404U (en) | 2014-06-13 | 2014-06-13 | Isolated two-way full-bridge DC-DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420317088.5U CN203933404U (en) | 2014-06-13 | 2014-06-13 | Isolated two-way full-bridge DC-DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203933404U true CN203933404U (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420317088.5U Expired - Fee Related CN203933404U (en) | 2014-06-13 | 2014-06-13 | Isolated two-way full-bridge DC-DC converter |
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| CN (1) | CN203933404U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868076A (en) * | 2019-11-15 | 2020-03-06 | 中国舰船研究设计中心 | DC-DC chopper device for ship regional power distribution |
-
2014
- 2014-06-13 CN CN201420317088.5U patent/CN203933404U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868076A (en) * | 2019-11-15 | 2020-03-06 | 中国舰船研究设计中心 | DC-DC chopper device for ship regional power distribution |
| CN110868076B (en) * | 2019-11-15 | 2021-08-10 | 中国舰船研究设计中心 | DC-DC chopper device for ship regional power distribution |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 |