CN203289325U - DC/DC (direct-current/direct-current) conversion circuit - Google Patents
DC/DC (direct-current/direct-current) conversion circuit Download PDFInfo
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- CN203289325U CN203289325U CN2013202510457U CN201320251045U CN203289325U CN 203289325 U CN203289325 U CN 203289325U CN 2013202510457 U CN2013202510457 U CN 2013202510457U CN 201320251045 U CN201320251045 U CN 201320251045U CN 203289325 U CN203289325 U CN 203289325U
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Abstract
The utility model discloses a DC/DC (direct-current/direct-current) conversion circuit. The DC/DC conversion circuit comprises a first contactor, a second contactor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a second inductor, a first IGBT (insulated gate bipolar translator), a second IGBT, a third IGBT, a fourth IGBT, a fifth IGBT, a sixth IGBT, a seventh IGBT, an eighth IGBT and a transformer, wherein the first IGBT and the third IGBT share a common collector and are connected with the first inductor, the fifth IGBT and the seventh IGBT share a common collector and are connected with the second inductor, the second IGBT and the fourth IGBT share a common emitter and are connected with the first inductor via the first capacitor, and the sixth IGBT and the eighth IGBT share a common emitter and are connected with the second inductor via the second capacitor; one end of the primary coil of the transformer is connected with the connected end of the first IGBT and the second IGBT via the third capacitor, and the other end of the primary coil of the transformer is connected with the connected end of the third IGBT and the fourth IGBT; one end of the secondary coil of the transformer is connected with the connected end of the fifth IGBT and the sixth IGBT via the fourth capacitor, and the other end of the secondary coil of the transformer is connected with the connected end of the seventh IGBT and the eighth IGBT; and the normally-open contact of the first capacitor is connected with the first inductor in parallel, and the normally-open contact of the second capacitor is connected with the second inductor in parallel. The DC/DC conversion circuit disclosed by the utility model is capable of efficiently realizing electric energy conversion.
Description
Technical field
The utility model relates to a kind of DC/DC(DC-DC) translation circuit.
Background technology
The DC/DC translation circuit can be realized boosting, step-down and buck, and the DC/DC translation circuit that is used for energy-storage system of accumulator is generally two-way, namely the direct current that changes can be converted into fixing direct current and store in storage battery, also the direct current of storing in storage battery can be changed into the direct current output into needs.At present, the form of DC/DC translation circuit is varied, but most power conversion efficiency is not high, and have that useful life is short, reliability is low and be subject to the shortcomings such as electromagnetic interference more, can be because of its high cost and overcome these shortcomings and had the DC/DC translation circuit of suitable power conversion efficiency, and be difficult to popularize, do not have practicality.Therefore, research a kind of with low cost, reliable, electromagnetic interference is little and have than the DC/DC translation circuit of long life is the problem that the applicant is devoted to solve.
Summary of the invention
The purpose of this utility model is to provide a kind of long service life, reliability is high, electromagnetic interference is little and with low cost DC/DC translation circuit, can realize efficiently the conversion of electric energy.
The technical scheme that realizes above-mentioned purpose is:
A kind of DC/DC translation circuit, it is characterized in that, comprise the first contactor, the second contactor, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the first inductance, the second inductance, an IGBT(insulated gate bipolar transistor), the 2nd IGBT, the 3rd IGBT, the 4th IGBT, the 5th IGBT, the 6th IGBT, the 7th IGBT, the 8th IGBT and transformer, wherein:
A described IGBT and the 3rd IGBT collector electrode separately connect respectively an end of described the first inductance, and the other end of this first inductance is as the first input end of described DC/DC translation circuit;
Described the 2nd IGBT is connected with the 4th IGBT emitter separately, as the second input of described DC/DC translation circuit;
Described the 5th IGBT and the 7th IGBT collector electrode separately connect respectively an end of described the second inductance, and the other end of this second inductance is as the first output of described DC/DC translation circuit;
Described the 6th IGBT is connected with the 8th IGBT emitter separately, as the second output of described DC/DC translation circuit;
The emitter of a described IGBT is connected with the collector electrode of described the 2nd IGBT, and this end that joins connects the first end of the primary coil of described transformer by described the 3rd electric capacity;
The emitter of described the 3rd IGBT is connected with the collector electrode of described the 4th IGBT, and this end that joins connects the second end of the primary coil of described transformer;
The emitter of described the 5th IGBT is connected with the collector electrode of described the 6th IGBT, and this end that joins connects the first end of the secondary coil of described transformer;
The emitter of described the 7th IGBT is connected with the collector electrode of described the 8th IGBT, and this end that joins connects the second end of the secondary coil of described transformer;
Described the first electric capacity is connected between the first input end and the second input of described DC/DC translation circuit;
Described the second electric capacity is connected between first output and the second output of described DC/DC translation circuit;
Described the first contactor comprises normally opened contact, its normally opened contact and the first inductance in parallel;
Described the second contactor comprises normally opened contact, its normally opened contact and the second inductance in parallel.
Above-mentioned DC/DC translation circuit, wherein, described the first to the 8th IGBT is the IGBT with anti-paralleled diode.
The beneficial effects of the utility model are: the utility model is effective in configuration by IGBT, contactor, electric capacity and inductance, can efficiently direct current be transformed and store in storage battery, also can efficiently the direct current energy of storing in storage battery be converted into the direct current output that needs.And the utility model, because its cost simple in structure is cheap, is easy to realize.Simultaneously, the utlity model has long service life, reliability is high and electromagnetic interference is little advantage.
Description of drawings
Fig. 1 is the circuit diagram of DC/DC translation circuit of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
See also Fig. 1, DC/DC translation circuit of the present utility model, comprise the first contactor KM1, the second contactor KM2, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4, the first inductance L 1, the second inductance L 2, an IGBT Q1, the 2nd IGBT Q2, the 3rd IGBT Q3, the 4th IGBT Q4, the 5th IGBTQ5, the 6th IGBT Q6, the 7th IGBT Q7, the 8th IGBT Q8 and transformer T, wherein:
The one IGBT Q1 and the 3rd IGBT Q3 collector electrode separately connect respectively an end of the first inductance L 1, and the other end of this first inductance L 1 is as the first input end of DC/DC translation circuit;
The 2nd IGBT Q2 is connected with the 4th IGBT Q4 emitter separately, as the second input of DC/DC translation circuit;
The 5th IGBT Q5 and the 7th IGBT Q7 collector electrode separately connect respectively an end of the second inductance L 2, and the other end of this second inductance L 2 is as the first output of DC/DC translation circuit;
The 6th IGBT Q6 is connected with the 8th IGBT Q8 emitter separately, as the second output of DC/DC translation circuit;
The emitter of the one IGBT Q1 is connected with the collector electrode of the 2nd IGBT Q2, this end first end by the primary coil of the 3rd capacitor C 3 connection transformer T that joins;
The emitter of the 3rd IGBT Q3 is connected with the collector electrode of the 4th IGBT Q4, the second end of the primary coil of this end connection transformer T that joins;
The emitter of the 5th IGBT Q5 is connected with the collector electrode of the 6th IGBT Q6, the first end of the secondary coil of this end connection transformer T that joins;
The emitter of the 7th IGBT Q7 is connected with the collector electrode of the 8th IGBT Q8, the second end of the secondary coil of this end connection transformer T that joins;
The first capacitor C 1 is connected between the first input end and the second input of DC/DC translation circuit;
The second capacitor C 2 is connected between first output and the second output of DC/DC translation circuit;
The first contactor KM1 comprises normally opened contact and coil, and its normally opened contact is in parallel with the first inductance L 1;
The second contactor KM2 comprises normally opened contact and coil, and its normally opened contact is in parallel with the second inductance L 2;
The first to the 8th IGBT Q1-Q8 base stage separately, and the first contactor KM1 and the second contactor KM2 coil are separately accepted PWM(pulse width modulation) pulse is controlled.
When charging a battery, the normally opened contact of the first contactor KM1 is closed, with the first inductance L 1 short circuit; The normally opened contact of the second contactor KM2 disconnects, and the second inductance L 2 and the second capacitor C 2 form LC low-pass filtering branch road;
When accumulators discharged, the normally opened contact of the first contactor KM1 disconnected, and the first inductance L 1 and the first capacitor C 1 form the LC filter branch; The normally opened contact of the second contactor KM2 is closed, with the second inductance L 2 short circuits.
In the present embodiment, the first to the 8th IGBT Q1-Q8 is the IGBT with anti-paralleled diode.
To sum up, the utlity model has the advantage that the life-span is long, reliability is high, electromagnetic interference is little and with low cost.
Above embodiment is only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, in the situation that do not break away from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.
Claims (2)
1. DC/DC translation circuit, it is characterized in that, comprise the first contactor (KM1), the second contactor (KM2), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the first inductance (L1), the second inductance (L2), an IGBT(Q1), the 2nd IGBT(Q2), the 3rd IGBT(Q3), the 4th IGBT(Q4), the 5th IGBT(Q5), the 6th IGBT(Q6), the 7th IGBT(Q7), the 8th IGBT(Q8) and transformer (T), wherein:
A described IGBT(Q1) with the 3rd IGBT(Q3) collector electrode separately connects respectively an end of described the first inductance (L1), and the other end of this first inductance (L1) is as the first input end of described DC/DC translation circuit;
Described the 2nd IGBT(Q2) with the 4th IGBT(Q4) separately emitter is connected, as the second input of described DC/DC translation circuit;
Described the 5th IGBT(Q5) with the 7th IGBT(Q7) collector electrode separately connects respectively an end of described the second inductance (L2), and the other end of this second inductance (L2) is as the first output of described DC/DC translation circuit;
Described the 6th IGBT(Q6) with the 8th IGBT(Q8) separately emitter is connected, as the second output of described DC/DC translation circuit;
A described IGBT(Q1) emitter and described the 2nd IGBT(Q2) collector electrode be connected, this end that joins connects the first end of the primary coil of described transformer (T) by described the 3rd electric capacity (C3);
Described the 3rd IGBT(Q3) emitter and described the 4th IGBT(Q4) collector electrode be connected, this end that joins connects the second end of the primary coil of described transformer (T);
Described the 5th IGBT(Q5) emitter and described the 6th IGBT(Q6) collector electrode be connected, this end that joins connects the first end of the secondary coil of described transformer (T);
Described the 7th IGBT(Q7) emitter and described the 8th IGBT(Q8) collector electrode be connected, this end that joins connects the second end of the secondary coil of described transformer (T);
Described the first electric capacity (C1) is connected between the first input end and the second input of described DC/DC translation circuit;
Described the second electric capacity (C2) is connected between first output and the second output of described DC/DC translation circuit;
Described the first contactor (KM1) comprises normally opened contact, and its normally opened contact is in parallel with the first inductance (L1);
Described the second contactor (KM2) comprises normally opened contact, and its normally opened contact is in parallel with the second inductance (L2).
2. DC/DC translation circuit according to claim 1, is characterized in that, described the first to the 8th IGBT(Q1-Q8) be the IGBT with anti-paralleled diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202510457U CN203289325U (en) | 2013-05-10 | 2013-05-10 | DC/DC (direct-current/direct-current) conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202510457U CN203289325U (en) | 2013-05-10 | 2013-05-10 | DC/DC (direct-current/direct-current) conversion circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203289325U true CN203289325U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202510457U Expired - Lifetime CN203289325U (en) | 2013-05-10 | 2013-05-10 | DC/DC (direct-current/direct-current) conversion circuit |
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| CN (1) | CN203289325U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259414A (en) * | 2013-05-10 | 2013-08-21 | 国家电网公司 | DC/ DC translation circuit |
-
2013
- 2013-05-10 CN CN2013202510457U patent/CN203289325U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103259414A (en) * | 2013-05-10 | 2013-08-21 | 国家电网公司 | DC/ DC translation circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |