CN206541712U - A kind of filter inductance for IGBT parallel current-equalizing circuits - Google Patents
A kind of filter inductance for IGBT parallel current-equalizing circuits Download PDFInfo
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- CN206541712U CN206541712U CN201720088706.7U CN201720088706U CN206541712U CN 206541712 U CN206541712 U CN 206541712U CN 201720088706 U CN201720088706 U CN 201720088706U CN 206541712 U CN206541712 U CN 206541712U
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- magnetic core
- copper cash
- winding
- filter inductance
- switch circuit
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Abstract
A kind of filter inductance for IGBT parallel current-equalizing circuits, including magnetic core La1, magnetic core La2, copper cash A and copper cash B, magnetic core La1 is together with magnetic core La2 mounted on top, the copper cash A carries out coiling on magnetic core La1 and forms main winding La11, copper cash A carries out coiling on magnetic core La2 and forms stream winding La22, the copper cash B carries out coiling on magnetic core La2 and forms main winding La21, copper cash B carries out coiling on magnetic core La1 and forms stream winding La12, the main winding La11 and stream winding La12 Same Name of Ends are opposite, the main winding La21 and stream winding La22 Same Name of Ends are opposite.
Description
Technical field
The utility model belongs to the technical field of power electronics, is specifically related to a kind of for IGBT parallel current-equalizing circuits
Filter inductance.
Background technology
For the design of high-power inverter (device that direct current energy is transformed into alternating current), generally using multiple power
The less IGBT of grade is in parallel to improve output current.When IGBT device is used in parallel, IGBT device parameter is inconsistent, driving
The factor such as signal is asynchronous, circuit layout is asymmetric can all cause the electric current distribution for flowing through IBGT devices in parallel unbalanced.Flow
Not good to be easily caused overcurrent deficiency when part IGBT device works, another part IBGT devices overload substantially reduces IGBT devices
The reliability of part, causes equipment output effect undesirable, or even causes IGBT device and device to damage.
At present, in order to which the electric current distribution for solving to flow through IBGT devices in parallel is unbalanced, it is typically employed in parallel branch and goes here and there
Join current sharing inductor, current sharing inductor generally requires larger inductance value, still, the larger current sharing inductor of inductance value it is bulky,
Cost is also high.
The content of the invention
The utility model is mainly the technical problem solved present in above-mentioned prior art is used for IGBT parallel connections there is provided one kind
The filter inductance of flow equalizing circuit.
Above-mentioned technical problem of the present utility model is mainly what is be addressed by following technical proposals：One kind is used for IGBT
The filter inductance of parallel current-equalizing circuit, including magnetic core La1, magnetic core La2, copper cash A and copper cash B, magnetic core La1 and above and below magnetic core La2
Be stacked together, the copper cash A carried out on magnetic core La1 coiling formed main winding La11, copper cash A carried out on magnetic core La2 around
Line forms stream winding La22, the copper cash B and coiling formation main winding La21 is carried out on magnetic core La2, and copper cash B is in magnetic core La1
Upper progress coiling forms stream winding La12, the main winding La11 and stream winding La12 Same Name of Ends on the contrary, the main winding
La21 and stream winding La22 Same Name of Ends are opposite.
Preferably, the magnetic core La1 is identical with magnetic core La2 sizes, material is identical.
Preferably, also including high-frequency switch circuit A and high-frequency switch circuit B, the high-frequency switch circuit A and high frequency are opened
Powered-down road B is identical, and using the driving of same drive signal.
Preferably, the initiating terminal of the copper cash A is connected with high-frequency switch circuit A, the initiating terminal and high frequency of the copper cash B
On-off circuit B is connected, and copper cash A clearing end and copper cash B clearing end are connected in parallel, and are connected with ac output end Vout.
Utility model has the advantage that：The utility model produces higher inductance value using two magnetic core series connection, full
Use demand of the foot to big inductance value.Acted on by the mutual inductance of magnetic core, realize the stream of IGBT parallel circuits, improve IGBT
Functional reliability, it is to avoid device failure.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present utility model.
Embodiment
Below by embodiment, and with reference to accompanying drawing, the technical solution of the utility model is described in further detail.
Embodiment：A kind of filter inductance for IGBT parallel current-equalizing circuits, as shown in figure 1, including magnetic core La1, magnetic core
La2, copper cash A and copper cash B, the magnetic core La1 are identical with magnetic core La2 sizes, and material is identical, and magnetic core La1 and magnetic core La2
Together, the copper cash A carries out coiling and forms main winding La11 mounted on top on magnetic core La1, and copper cash A is enterprising in magnetic core La2
Row coiling forms stream winding La22, the copper cash B and coiling formation main winding La21 is carried out on magnetic core La2, and copper cash B is in magnetic core
On La1 carry out coiling formed stream winding La12, the main winding La11 and flow winding La12 Same Name of Ends on the contrary, the master around
Group La21 and stream winding La22 Same Name of Ends are on the contrary, the main winding La11 and stream winding La12 turn ratio and main winding
La21 is identical with stream winding La22 turn ratio.
The high-frequency switch circuit A is identical with high-frequency switch circuit B, and using the driving of same drive signal, the copper
Line A initiating terminal is connected with high-frequency switch circuit A, and the initiating terminal of the copper cash B is connected with high-frequency switch circuit B, copper cash A end
Not-go-end and copper cash B clearing end are connected in parallel, and are connected with ac output end Vout.
High-frequency switch circuit A output current is I1, and electric current I1 flows through magnetic core La1 main winding La11 and magnetic core La2
Stream winding La22.High-frequency switch circuit B output current be I2, electric current I2 flow through magnetic core La2 main winding La21 and
Magnetic core La1 stream winding La12, it is assumed that main winding La11 and stream winding La12 turn ratio and main winding La21 and flow
Winding La22 turn ratio is all N.
Self induction electromotive force Ea1=E11+E22 on magnetic core La1；
Self induction electromotive force Ea2=E21+E12 on magnetic core La2；
Mutual voltage U11=-E11/N, U12=-E12*N；
Mutual voltage U22=-E21/N, U21=-E22*N；
Input voltage vin=Ea1+U22+Vout=Ea2+U11+Vout；
Understand E11+E22+U22=E21+E12+U11.
If output current I1 and I2 are uneven, such as output current I1 increases, self induction electromotive force E11 can also increase, in mutual inductance
Under effect, mutual voltage U11 also bears increase.Now in I2 branch roads, due to the negative increases of mutual voltage U11, make output current I2
Increase, so as to realize output current I1 and I2 autobalance.
Finally it is pointed out that above example is only the more representational example of the utility model.Obviously, this practicality is new
Type is not limited to above-described embodiment, can also there is many deformations.It is every according to technical spirit of the present utility model to above example
Any simple modification, equivalent variations and the modification made, are considered as belonging to protection domain of the present utility model.
Claims (4)
1. a kind of filter inductance for IGBT parallel current-equalizing circuits, including magnetic core La1, magnetic core La2, copper cash A and copper cash B, magnetic
Core La1 is together with magnetic core La2 mounted on top, it is characterised in that the copper cash A carries out coiling on magnetic core La1 and forms main winding
La11, copper cash A carried out on magnetic core La2 coiling formed stream winding La22, the copper cash B coiling shape is carried out on magnetic core La2
Into main winding La21, copper cash B carried out on magnetic core La1 coiling formed stream winding La12, the main winding La11 and flow around
Group La12 Same Name of Ends is on the contrary, the main winding La21 and stream winding La22 Same Name of Ends are opposite.
2. a kind of filter inductance for IGBT parallel current-equalizing circuits according to claim 1, it is characterised in that the magnetic core
La1 is identical with magnetic core La2 sizes, and material is identical.
3. a kind of filter inductance for IGBT parallel current-equalizing circuits according to claim 1, it is characterised in that also including height
Frequency switching circuit A and high-frequency switch circuit B, the high-frequency switch circuit A are identical with high-frequency switch circuit B, and using same
Drive signal drives.
4. a kind of filter inductance for IGBT parallel current-equalizing circuits according to claim 3, it is characterised in that the copper cash A
Initiating terminal be connected with high-frequency switch circuit A, the initiating terminal of the copper cash B is connected with high-frequency switch circuit B, copper cash A termination
End and copper cash B clearing end are connected in parallel, and are connected with ac output end Vout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720088706.7U CN206541712U (en) | 2017-01-20 | 2017-01-20 | A kind of filter inductance for IGBT parallel current-equalizing circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720088706.7U CN206541712U (en) | 2017-01-20 | 2017-01-20 | A kind of filter inductance for IGBT parallel current-equalizing circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206541712U true CN206541712U (en) | 2017-10-03 |
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ID=59940373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720088706.7U Active CN206541712U (en) | 2017-01-20 | 2017-01-20 | A kind of filter inductance for IGBT parallel current-equalizing circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206541712U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108615724A (en) * | 2018-05-08 | 2018-10-02 | 西安交通大学 | A kind of micro- sense type IGBT parallel current-sharing structures |
| CN108988615A (en) * | 2018-08-19 | 2018-12-11 | 云南卡方机电设备有限公司 | A kind of parallel current-equalizing circuit topological structure |
-
2017
- 2017-01-20 CN CN201720088706.7U patent/CN206541712U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108615724A (en) * | 2018-05-08 | 2018-10-02 | 西安交通大学 | A kind of micro- sense type IGBT parallel current-sharing structures |
| CN108988615A (en) * | 2018-08-19 | 2018-12-11 | 云南卡方机电设备有限公司 | A kind of parallel current-equalizing circuit topological structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190627 Address after: 312300 No. 5 Ni Lu Road, Lianghu Industrial Park, Shangyu District, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Fenglong Electrical Machinery Co., Ltd. Address before: 312000 Shaoxing Biaoxin Mechanical and Electrical Technology Co., Ltd. on the 2nd floor of Building 51, Yuedongnan Road, Doumen Town, Yuecheng District, Shaoxing City, Zhejiang Province Patentee before: SHAOXING BEASIN MACHINERY & ELECTRIC TECHNOLOGY CO.,LTD. |
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| TR01 | Transfer of patent right |