CN205317884U - Be applied to testing arrangement of fuse in IGBT module - Google Patents
Be applied to testing arrangement of fuse in IGBT module Download PDFInfo
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- CN205317884U CN205317884U CN201521127606.8U CN201521127606U CN205317884U CN 205317884 U CN205317884 U CN 205317884U CN 201521127606 U CN201521127606 U CN 201521127606U CN 205317884 U CN205317884 U CN 205317884U
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- branch road
- bridge arm
- fuse
- igbt
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- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 230000001681 protective effect Effects 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Abstract
The embodiment of the utility model provides a be applied to testing arrangement of fuse in IGBT module, it includes: IGBT half -bridge arm module, first connection branch road and a second connection branch road, and the fuse that sets up on a first connection branch road or a second connection way inserts the port, the upper and lower bridge arm of IGBT half -bridge arm module is connected, the bridge arm midpoint connection of first connection branch road one end and IGBT half -bridge arm module, the other end are connected with external three -phase AC power supply's A, second connection branch road one end is connected with the lower bridge arm of IGBT half -bridge arm module, the other end is connected with three -phase AC power supply's B. This embodiment is through adopting buildding of a IGBT half -bridge arm module alright completion test single -phase short circuit to the detection fuse had both reduced the device volume to freewheeling diode's protective capability, and portable has saved the cost again.
Description
Technical field
This utility model relates to electric and electronic technical field, particularly to the test device of a kind of fuse being applied in IGBT module.
Background technology
Existing insulated gate bipolar transistor (InsulatedGateBipolarTransistor, IGBT) power model generally comprises multiple IGBT half bridge arm module, and each IGBT half bridge arm module is made up of upper brachium pontis and lower brachium pontis; Upper and lower brachium pontis is all formed by connecting by the fly-wheel diode of an IGBT and a reversal connection. In prior art test fuse protection IGBT module in fly-wheel diode single-phase short circuit experimental circuit as shown in Figure 1; two-way connects branch road and connects respectively at the brachium pontis midpoint of two IGBT half bridge arm modules; by two phase voltages in external three-phase alternating current, complete the protective capability of the single-phase short circuit of fly-wheel diode in test fuse protection IGBT module.
First prior art has following defects that, needs two IGBT half bridge arm modules 1 in parallel in whole test circuit, and circuit structure is complicated; Secondly, this test circuit can only test the single-phase alternating current impact on IGBT half bridge arm module 1, it is impossible to the existing three-phase alternating current of simulation test electrically connects operative scenario during IGBT half bridge arm module.
Utility model content
Embodiment of the present utility model provides the test device of a kind of fuse being applied in IGBT module, by adopting an IGBT half bridge arm module detection fuse protective capability to fly-wheel diode.
For reaching above-mentioned purpose, embodiment of the present utility model provides the test device of a kind of fuse being applied in IGBT module, including: IGBT half bridge arm module, a first connection branch road and second connect branch road; And the fuse access interface arranged on branch road or described second connection branch road is connected described first; The upper and lower brachium pontis of described IGBT half bridge arm module connects;Branch road one end is connected with the brachium pontis midpoint of described IGBT half bridge arm module, the other end is connected with the A of three-phase alternating-current supply in described first connection; Branch road one end is connected with the lower brachium pontis of described IGBT half bridge arm module, the other end is connected with the B of described three-phase alternating-current supply in described second connection.
Device as above, described test device also includes: the 3rd connects branch road, and branch road one end is connected with the lower brachium pontis of described IGBT half bridge arm module, the other end is connected with the C of described three-phase alternating-current supply in described 3rd connection; When described second connects and be provided with described fuse access interface on branch road, the described 3rd connects branch road one end is connected with the lower brachium pontis of described IGBT half bridge arm module by described fuse access interface.
Device as above, described test device also includes: series unit, and described series unit includes the inductance, resistance and the first switching device that are sequentially connected in series; Described first connection branch road and described second connection branch road are provided with described series unit, or, being provided with described series unit on described first connection branch road, described second connection branch road and described 3rd connection branch road, one end of described first switching device in each described series unit is connected with described three-phase alternating-current supply.
Device as above, each described series unit includes the second switch device being sequentially connected in series, described inductance, described resistance and described first switching device.
Device as above, also includes described three-phase alternating-current supply in described test device.
Device as above, described first switching device and described second switch device are contact switch or single knife switch.
The test device of the fuse being applied in IGBT module that this utility model embodiment provides; by adopting IGBT half bridge arm module just can complete building of test single-phase short circuit; to detect the fuse protective capability to fly-wheel diode; both device volume had been reduced; it is easy to carry, provides cost savings again.
Accompanying drawing explanation
Fig. 1 is that in prior art, the single-phase short circuit experimental circuit of fly-wheel diode in IGBT module protected by a kind of fuse of testing;
The structural representation of test one embodiment of device of the fuse being applied in IGBT module that Fig. 2 provides for this utility model;
The structural representation of test another embodiment of device of the fuse being applied in IGBT module that Fig. 3 provides for this utility model;
The structural representation of the test device further embodiment of the fuse being applied in IGBT module that Fig. 4 provides for this utility model;
The structural representation of test another embodiment of device of the fuse being applied in IGBT module that Fig. 5 provides for this utility model.
Drawing reference numeral illustrates: S1-first connects branch road; S2-second connects branch road; 1-IGBT half bridge arm module; 2-fuse access interface; L-inductance; R-resistance; K1-the first switching device; K2-second switch device.
Detailed description of the invention
Below in conjunction with accompanying drawing, the test device of the fuse that this utility model embodiment is applied in IGBT module is described in detail.
Embodiment one
The structural representation of test one embodiment of device of the fuse being applied in IGBT module that Fig. 2 provides for this utility model, this test device includes IGBT half bridge arm module 1, first and connects branch road S1 and the second connection branch road S2 and connect, first, the fuse access interface 2 for access fuse arranged on branch road S1 or second connection branch road S2.
Specifically, first one end connecting branch road S1 is connected with the brachium pontis midpoint of IGBT half bridge arm module 1, and its other end is connected with the A of three-phase alternating-current supply; Second one end connecting branch road S2 is connected with the lower brachium pontis of IGBT half bridge arm module 1, and its other end is connected with the B of three-phase alternating-current supply; The upper and lower brachium pontis of IGBT half bridge arm module 1 connects, to form loop.
Below the principle of test is described in detail:
Fuse is accessed after connecting circuit according to the mode of Fig. 2, if A, B top-stitching voltage is forward voltage, then electric current flows out from A phase, flows through direction and passes sequentially through the fly-wheel diode of brachium pontis in the first connection branch road S1, fuse, the brachium pontis midpoint of IGBT half bridge arm module 1, IGBT module, upper brachium pontis and the line of lower brachium pontis, the second connection branch road S2, eventually passes back to B phase. If A, B top-stitching voltage is reverse voltage, then electric current flows out from B phase, flow through direction and pass sequentially through the fly-wheel diode of brachium pontis under the second connection branch road S2, IGBT module, the brachium pontis midpoint of IGBT half bridge arm module 1, fuse, the first connection branch road S1, eventually pass back to A phase.
In test process, it is possible to regulating the size of alternating current power supply phase voltage, when phase voltage reaches the damage voltage of fly-wheel diode, fuse disconnects in time, illustrate that the protective capability of fuse is strong, meet the requirements; If phase voltage arrives sufficiently large, fly-wheel diode is damaged, but fuse remains without fusing, illustrates that the protective capability of fuse is weak.
The test device of the fuse being applied in IGBT module that this utility model embodiment provides; by adopting IGBT half bridge arm module just can complete building of test single-phase short circuit; to detect the fuse protective capability to fly-wheel diode; both device volume had been reduced; it is easy to carry, provides cost savings again.
Embodiment two
The structural representation of test another embodiment of device of the fuse being applied in IGBT module that Fig. 3 provides for this utility model. As it is shown on figure 3, on the basis of Fig. 2, this test device also includes the 3rd connection branch road S3.
Specifically, the 3rd one end connecting branch road S3 is connected with the lower brachium pontis of IGBT half bridge arm module 1, and its other end is connected with the C of three-phase alternating-current supply.
In the present embodiment, the second connection branch road S2 and the three connection branch road S3 is provided with a points of common connection near one end of IGBT half bridge arm module 1. Preferably, when second connects and is provided with fuse access interface 2 on branch road S2,3rd connects branch road S3 one end is connected with the lower brachium pontis of IGBT half bridge arm module 1 by fuse access interface 2, so, and can so that the second connection branch road S2 and the three connects branch road S3 and shares a fuse.
The test device of the fuse being applied in IGBT module that this utility model embodiment provides, can be tested by the A phase of three-phase alternating-current supply fuse relative to B, can also be tested by B phase fuse relative to C C phase or A phase, complete building of test single-phase short circuit; Fuse is tested simultaneously and can simulate the situation of three-phase shortcircuit by three-phase alternating-current supply simultaneously.
Embodiment three
The structural representation of the test device further embodiment of the fuse being applied in IGBT module that Fig. 4 provides for this utility model, it can be considered the specific implementation of Fig. 2.
As shown in Figure 4, on the basis of Fig. 2, this test device also includes series unit, and series unit includes inductance L, the resistance R and the first switching device K1 that are sequentially connected in series;Being provided with series unit on first connection branch road and the second connection branch road, one end of the first switching device K1 in each series unit is turned on or off with three-phase alternating-current supply and is connected.
In the present embodiment, the first switching device K1 is preferably mounted to the position that distance alternating current power supply is nearer, in order to quickly switches power supply and the power-off of alternating current power supply, it is prevented that inductance L and the electric current in resistance R shake, damages the element in circuit. Further, inductance L and resistance R is not strict with by the present embodiment in the position of circuit.
Preferably, each series unit can also include the second switch device K2, inductance L, resistance R and the first switching device K1 that are sequentially connected in series, when fuse access interface 2 is between brachium pontis midpoint or lower brachium pontis and the second switch device K2 of corresponding IGBT half bridge arm module 1 connecting branch road, each branch road that connects is turned on or off connection respectively through second switch device K2 and IGBT half bridge arm module 1.
In the present embodiment, second switch device K2 is preferably mounted to the side near fuse access interface 2, in order to be quickly turned on and off the testing experiment to molten electrical equipment, it is to avoid electric current is excessive causes damage to fuse or IGBT half bridge arm module 1.
The structural representation of test another embodiment of device of the fuse being applied in IGBT module that Fig. 5 provides for this utility model, it can be considered the specific implementation of Fig. 3, as shown in Figure 5, on the basis of Fig. 3, being provided with series unit on first connection branch road S1, the second connection branch road S2 and the 3rd connection branch road S3, each series unit includes the second switch device K2, inductance L, resistance R and the first switching device K1 that are sequentially connected in series.
Preferably, above-mentioned first switching device K1 and second switch device K2 is contact switch or single knife switch, use contact switch can realize startup and the stopping of the test of quick switch test, use single knife switch that wiring circuit contact can be made good, it is to avoid situation about virtually connecting occurs.
Further, the test device of the above-mentioned fuse being applied in IGBT module also includes three-phase alternating-current supply, the phase voltage end of A phase in three-phase alternating-current supply, B phase and C phase is connected branch road S1 respectively, second connects branch road S2 and the 3rd and connect branch road S3 and connect with first, thinks that test device provides Alternating Current Power Supply environment.
The test device of the fuse being applied in IGBT module that this utility model embodiment provides, by adopting IGBT half bridge arm module to complete building of test single-phase short circuit, has both reduced device volume, it is simple to carry, has provided cost savings again; Simultaneously at three-phase alternating-current supply under the excitation of IGBT half bridge arm module; this device can also test the situation of three-phase shortcircuit; the more complete protective value testing fuse, more more rich than the detection function of existing single phase alternating current power supply, test effect more reliable.
It may be noted that, according to the needs implemented, each step/parts described in this application can be split as more multi-step/parts, it is possible to the part operation of two or more step/parts or step/parts is combined into new step/parts, to realize the purpose of this utility model.
Above-mentioned can at hardware according to method of the present utility model, firmware realizes, or it is implemented as and is storable in record medium (such as CDROM, RAM, floppy disk, hard disk or magneto-optic disk) in software or computer code, or the original storage being implemented through network download and will be stored in the computer code in local recording medium in remotely record medium or nonvolatile machine readable media, thus method described here can be stored in use general purpose computer, application specific processor or able to programme or specialized hardware (such as ASIC or FPGA) the such software processes recorded on medium.It is appreciated that, computer, processor, microprocessor controller or programmable hardware include can storing or receive the storage assembly of software or computer code (such as, RAM, ROM, flash memory etc.), when described software or computer code are by computer, processor or hardware access and execution, it is achieved processing method described here. Additionally, when general purpose computer accesses for the code of the process realizing being shown in which, general purpose computer is converted to for performing the special-purpose computer of process being shown in which by the execution of code.
The above; it is only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; change can be readily occurred in or replace, all should be encompassed within protection domain of the present utility model. Therefore, protection domain of the present utility model should be as the criterion with described scope of the claims.
Claims (6)
1. the test device of the fuse being applied in IGBT module, it is characterised in that including: IGBT half bridge arm module (1), first connection branch road (S1) and second connect branch road (S2); And branch road (S1) or the described second upper fuse access interface (2) arranged of connection branch road (S2) is connected described first; The upper and lower brachium pontis of described IGBT half bridge arm module (1) connects; Branch road (S1) one end is connected with the brachium pontis midpoint of described IGBT half bridge arm module (1), the other end is connected with the A of three-phase alternating-current supply in described first connection; Branch road (S2) one end is connected with the lower brachium pontis of described IGBT half bridge arm module (1), the other end is connected with the B of described three-phase alternating-current supply in described second connection.
2. test device according to claim 1, it is characterized in that, described test device also includes: the 3rd connects branch road (S3), and branch road (S3) one end is connected with the lower brachium pontis of described IGBT half bridge arm module (1), the other end is connected with the C of described three-phase alternating-current supply in described 3rd connection; When described second connects and be provided with described fuse access interface (2) on branch road (S2), the described 3rd connects branch road (S3) one end is connected with the lower brachium pontis of described IGBT half bridge arm module (1) by described fuse access interface (2).
3. test device according to claim 2, it is characterized in that, described test device also includes series unit, and described series unit includes the inductance (L), resistance (R) and the first switching device (K1) that are sequentially connected in series; Described first connection branch road (S1) and described second connection branch road (S2) are provided with described series unit, or, being provided with described series unit in described first connection branch road (S1), described second connection branch road (S2) and described 3rd connection branch road (S3), one end of described first switching device (K1) in each described series unit is connected with described three-phase alternating-current supply.
4. test device according to claim 3, it is characterized in that, each described series unit includes the second switch device (K2) being sequentially connected in series, described inductance (L), described resistance (R) and described first switching device (K1).
5. test device according to claim 4, it is characterised in that also include described three-phase alternating-current supply in described test device.
6. test device according to claim 5, it is characterised in that described first switching device (K1) and described second switch device (K2) are contact switch or single knife switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521127606.8U CN205317884U (en) | 2015-12-29 | 2015-12-29 | Be applied to testing arrangement of fuse in IGBT module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521127606.8U CN205317884U (en) | 2015-12-29 | 2015-12-29 | Be applied to testing arrangement of fuse in IGBT module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205317884U true CN205317884U (en) | 2016-06-15 |
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| CN201521127606.8U Active CN205317884U (en) | 2015-12-29 | 2015-12-29 | Be applied to testing arrangement of fuse in IGBT module |
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| CN (1) | CN205317884U (en) |
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- 2015-12-29 CN CN201521127606.8U patent/CN205317884U/en active Active
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