CN203289334U - Three-phase rectifier bridge - Google Patents
Three-phase rectifier bridge Download PDFInfo
- Publication number
- CN203289334U CN203289334U CN2013203076022U CN201320307602U CN203289334U CN 203289334 U CN203289334 U CN 203289334U CN 2013203076022 U CN2013203076022 U CN 2013203076022U CN 201320307602 U CN201320307602 U CN 201320307602U CN 203289334 U CN203289334 U CN 203289334U
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- bridge
- copper
- copper sheets
- phase rectifier
- rectifier bridge
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Abstract
A three-phase rectifier bridge comprises two copper sheets, six diode chips and six extraction electrodes, wherein the copper sheets, the diode chips and the extraction electrodes are arranged on a substrate and connected according to a three-phase rectifier bridge circuit, and the six diode chips are welded on the two copper sheets respectively in an opposing manner. The three-phase rectifier bridge is characterized in that a connecting bridge on the end face of the pair of diode chips disposed in the middle of the two cooper sheets is a circular conductive bridge, and the circular conductive bridge is connected with one extraction electrode correspondingly. The three-phase rectifier bridge has the advantages of high working reliability.
Description
Technical field
The utility model relates to a kind of semiconductor device, particularly a kind of three-phase commutation bridge.
Background technology
The three-phase commutation bridge of prior art usually as Figure 1-3, by being located on aluminum-based copper-clad plate, and is pressed two copper sheets, six diode chip for backlight unit and six extraction electrodes formations that the three phase rectifier bridge circuit connects.In described two copper sheets, pair of diodes chip end face crossover is semicircle annular conducting bridge, and should connect an extraction electrode by the semicircle conducting bridge.
Because above-mentioned common stating in three-phase commutation bridge two copper sheets is made as semicircle annular crossover bottom a pair of extraction electrode, when producing encapsulation, its semicircle annular crossover two ends are unbalanced to the active force of diode chip for backlight unit end face generation; During work, its crossover is also unbalanced to the effect of stress that the diode chip for backlight unit end face produces, thereby makes two diode chip for backlight unit that this semicircle annular crossover joins predispose to damage.And, because above-mentioned semicircle annular conducting bridge sectional area is less, when selecting high-power diode chip, will cause this semicircle annular crossover temperature relatively too high, and diode chip for backlight unit is burnt, have a strong impact on whole three-phase commutation bridge product reliability.
Summary of the invention
The utility model, in order to solve the existing problem of above-mentioned common three-phase commutation bridge, newly provides a kind of three-phase commutation bridge, and the extraction electrode bottom crossover structure that connects to improve the middle pair of diodes chip of two copper sheets end face, make the three-phase commutation bridge functional reliability high.
A kind of three-phase commutation bridge described in the utility model, comprise and being located on substrate, and press two copper sheets, six diode chip for backlight unit and six extraction electrodes that the three phase rectifier bridge circuit connects, described six diode chip for backlight unit are welded on respectively on two copper sheets relatively, it is characterized in that: in the middle of described two copper sheets, pair of diodes chip end face crossover is the annular conducting bridge, and corresponding connection one extraction electrode of this annular conducting bridge.
Further, described substrate is aluminum-based copper-clad plate, perhaps copper coin and ceramic copper-clad plate welding, consists of.
Useful technique effect of the present utility model is: with pair of diodes chip end face crossover in the middle of two copper sheets, be that the annular conducting bridge is made as the annular conducting bridge, it has increased conductive cross-sectional area, and this annular conducting bridge is more balanced to the diode chip for backlight unit active force that joins, and makes three-phase commutation bridge work lean on property high.
Description of drawings
Fig. 1 is the plan structure schematic diagram of common three-phase commutation bridge.
Fig. 2 is semicircle conducting bridge structure enlarged diagram in Fig. 1.
Fig. 3 is the plan structure enlarged diagram of Fig. 2.
Fig. 4 is the plan structure schematic diagram of the utility model embodiment.
Fig. 5 is the copper sheet structure enlarged diagram in Fig. 4.
Fig. 6 is circular conducting bridge structure enlarged diagram in Fig. 4.
Fig. 7 is Fig. 6 plan structure enlarged diagram.
Fig. 8 is the utility model electrical block diagram.
Embodiment
Accompanying drawing marking explanation: substrate 1, diode chip for backlight unit (2,20,21,22,23,24), copper sheet 3, extraction electrode (4,5,6,7,8), crossover (5,51,7,70,71,8,81), post hole 10.
As shown in Figure 5-Figure 8, a kind of three-phase commutation bridge, comprise and being located on substrate 1, and press two copper sheets 3, six diode chip for backlight unit (2,20,21,22,23,24) and six extraction electrodes (4,5,6,7,8) that the three phase rectifier bridge circuit connects, described six diode chip for backlight unit (2,20,21,22,23,24) are welded on respectively on two copper sheets 3 relatively, in the middle of described two copper sheets 3, pair of diodes chip (20,23) end face crossover 71 is the annular conducting bridge, and corresponding connection one extraction electrode 7 of this annular conducting bridge.
Described substrate 1 is aluminum-based copper-clad plate, perhaps copper coin and ceramic copper-clad plate welding, consists of.
In Fig. 1, crossover 70 connects pair of diodes chip (20,23), and with extraction electrode 7, is electrically connected to.
In Fig. 5, crossover 71 connects pair of diodes chip (20,23), and with extraction electrode 7, is electrically connected to; Crossover 81 connects pair of diodes chip (2,24), and with extraction electrode 8, is electrically connected to; Crossover 51 connects pair of diodes chip (21,22), and with extraction electrode 5, is electrically connected to.Extraction electrode 7 bottoms and crossover 81 are separated by and are had living space up and down, do not interconnect; Extraction electrode 4 and 6 is electrically connected to upper left two copper sheets 3 of establishing that part on the right side of substrate 1 respectively.
During application, be provided with therebetween routinely post hole 10 on described substrate 1, and arrange and this corresponding newel in post hole 10, then adopt insulation crust and epoxy encapsulation.
The utility model is made as the annular conducting bridge with pair of diodes chip end face crossover 71 in the middle of two copper sheets, its conductive cross-sectional area doubles than original semicircle annular conducting bridge, electric conductivity strengthens, and this annular conducting bridge is more balanced to the pair of diodes chip active force that joins.Therefore, whole three-phase commutation bridge functional reliability is high.
What should be understood that is: above-described embodiment is just to explanation of the present utility model, and any innovation and creation that do not exceed in the utility model connotation scope, within all falling into protection range of the present utility model.
Claims (2)
1. three-phase commutation bridge, comprise and being located on substrate, and press two copper sheets, six diode chip for backlight unit and six extraction electrodes that the three phase rectifier bridge circuit connects, described six diode chip for backlight unit are welded on respectively on two copper sheets relatively, it is characterized in that: in the middle of described two copper sheets, pair of diodes chip end face crossover is the annular conducting bridge, and corresponding connection one extraction electrode of this annular conducting bridge.
2. a kind of three-phase commutation bridge according to claim 1, it is characterized in that: described substrate is aluminum-based copper-clad plate, perhaps copper coin and ceramic copper-clad plate welding, consists of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203076022U CN203289334U (en) | 2013-05-31 | 2013-05-31 | Three-phase rectifier bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203076022U CN203289334U (en) | 2013-05-31 | 2013-05-31 | Three-phase rectifier bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203289334U true CN203289334U (en) | 2013-11-13 |
Family
ID=49545676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203076022U Expired - Fee Related CN203289334U (en) | 2013-05-31 | 2013-05-31 | Three-phase rectifier bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203289334U (en) |
-
2013
- 2013-05-31 CN CN2013203076022U patent/CN203289334U/en not_active Expired - Fee Related
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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: 20131113 |