CN218767250U - Switching power supply EMI radiation test equipment - Google Patents
Switching power supply EMI radiation test equipment Download PDFInfo
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- CN218767250U CN218767250U CN202222508941.9U CN202222508941U CN218767250U CN 218767250 U CN218767250 U CN 218767250U CN 202222508941 U CN202222508941 U CN 202222508941U CN 218767250 U CN218767250 U CN 218767250U
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Abstract
The utility model relates to the field of test equipment, in particular to a switch power supply EMI radiation test equipment, which comprises a test cabinet, a shielding box connected with the test cabinet and a test fixture arranged inside the shielding box; the test cabinet comprises a frequency spectrograph used for detecting and displaying whether a radiation signal of the tested switching power supply exceeds a standard or not; the test fixture comprises a fixture box, a load adjustable resistor, a voltage protocol board and a signal pickup probe, wherein the load adjustable resistor, the voltage protocol board and the signal pickup probe are respectively arranged on the fixture box; the voltage protocol board is connected with a plurality of output lines, the output lines are connected to a switch power supply to be tested, and the signal pickup probe is used for picking up a radiation current signal of the output lines and converting the radiation current signal into a voltage signal for detection of the frequency spectrograph. The utility model discloses a system composition is with low costs, area occupied is little, test time is short, can install and examine the test entirely on the production line to stop EMI radiation product outflow that exceeds standard.
Description
Technical Field
The utility model relates to a test equipment field especially relates to a switching power supply EMI radiates test equipment.
Background
With the discovery of electronic technology, more and more control panel circuits are using switching power supplies for power conversion. With the development of chip technology, the switching frequency is higher and higher, and a lot of high-frequency interference is generated.
In the current production process of the switching power supply adapter, in order to confirm that the EMI radiation of a product does not exceed the standard, the product needs to be taken to an authenticated EMI laboratory for testing at irregular intervals. Because the EMI laboratory is expensive to build, most manufacturers rent third party laboratories to test, which results in high test cost and failure to perform full inspection on all products. Due to the sampling inspection of the goods, all products cannot be guaranteed not to exceed standards.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a switching power supply EMI radiation testing equipment convenient to use, with low costs.
The utility model adopts the following technical scheme:
a switching power supply EMI radiation test device comprises a test cabinet, a shielding box connected with the test cabinet, and a test fixture arranged inside the shielding box; the test cabinet comprises a frequency spectrograph used for detecting and displaying whether a radiation signal of the tested switching power supply exceeds the standard or not; the test fixture comprises a fixture box, a load adjustable resistor, a voltage protocol board and a signal pickup probe, wherein the load adjustable resistor, the voltage protocol board and the signal pickup probe are respectively arranged on the fixture box; the voltage protocol board is connected with a plurality of output lines, the output lines are connected to a switch power supply to be detected, and the signal pickup probe is used for picking up a radiation current signal of the output lines and converting the radiation current signal into a voltage signal for detection of the frequency spectrograph.
The technical scheme is further improved in that the test cabinet further comprises an industrial personal computer, an artificial power supply network and an isolation filter power supply, wherein the industrial personal computer is respectively connected to the artificial power supply network and the isolation filter power supply.
The further improvement to the technical scheme is that the shielding box comprises a box body, a cover door connected to the upper portion of the box body, a plurality of opening and closing air cylinders respectively connected with the box body and the cover door, and a safety grating arranged on the front sides of the box body and the cover door, wherein the testing jig is arranged inside the box body.
The further improvement to the technical scheme is that the inner walls of the box body and the cover door are respectively provided with radiation isolation soundproof cotton.
The technical scheme is further improved in that the opening and closing air cylinder comprises a cylinder barrel and a piston rod sleeved on the cylinder barrel, one end of the piston rod is connected to the side face of the cover door, and one end of the cylinder barrel, which deviates from the piston rod, is connected to the side face of the box body.
The further improvement to the technical scheme is that a protective cover is arranged on the outer side of the opening and closing cylinder.
The jig box is further improved by being provided with a plurality of heat dissipation mounting holes, and the heat dissipation mounting holes are provided with heat dissipation fans.
The further improvement of the technical scheme is that the jig box is provided with a plurality of wire grooves, and the output wires are arranged inside the wire grooves.
The further improvement of the technical scheme is that the jig box is provided with a plurality of sockets for the insertion of the tested switching power supply.
The further improvement of the technical scheme is that the jig box is provided with two first handles, and the shielding box is provided with two second handles.
The beneficial effects of the utility model are that:
the utility model discloses a system composition is with low costs, area occupied is little, test time is short, can install and examine the test entirely on the production line to stop the EMI radiation product outflow that exceeds standard.
Drawings
Fig. 1 is a hardware configuration diagram of the switching power supply EMI radiation testing apparatus of the present invention;
fig. 2 is a schematic structural view of the shielding box and the testing jig of the switching power supply EMI radiation testing apparatus of the present invention;
FIG. 3 is a schematic diagram of the shielding cage of the switching power supply EMI radiation testing apparatus of FIG. 2;
fig. 4 is a schematic structural diagram of a testing fixture of the switching power supply EMI radiation testing apparatus of fig. 2.
Detailed Description
The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
As shown in fig. 1 to 4, a testing apparatus for EMI radiation of a switching power supply includes a testing cabinet 10, a shielding box 20 connected to the testing cabinet 10, and a testing fixture 30 disposed inside the shielding box 20; the test cabinet 10 comprises a frequency spectrograph 11 for detecting and displaying whether the radiation signal of the tested switching power supply 40 exceeds the standard; the test fixture 30 comprises a fixture box 31, a load adjustable resistor 32, a voltage protocol board 33 and a signal pickup probe 34 which are respectively arranged on the fixture box 31; the voltage protocol board 33 is connected with a plurality of output lines 35, the output lines 35 are connected to a tested switching power supply 40, and the signal pickup probe 34 is used for picking up a radiation current signal of the output lines 35 and converting the radiation current signal into a voltage signal for detection of the frequency spectrograph 11.
The voltage protocol board 33 is used to simulate the charging state, so that the switching power supply 40 (adapter) to be tested outputs proper voltage and current.
As shown in fig. 1, the test cabinet 10 further includes an industrial personal computer 12, an artificial power supply network 13, and an isolation filter power supply 14, where the industrial personal computer 12 is connected to the artificial power supply network 13 and the isolation filter power supply 14, respectively.
The industrial personal computer 12 comprises a software setting, operation and result display observation window, the artificial power supply network 13 is used for separating a radiation signal from an input power line of the tested switching power supply 40, the isolation filter power supply 14 is used for eliminating a test error caused by an external interference signal entering a test end through the power line, and the load adjustable resistor 32 is used for adjusting a DC load current of the tested switching power supply 40 so as to test the tested switching power supply under a proper current.
As shown in fig. 3, the shielding box 20 further includes a box body 21, a cover door 22 connected to the upper side of the box body 21, a plurality of opening/closing cylinders 23 respectively connected to the box body 21 and the cover door 22, and a safety light grating 24 disposed at the front sides of the box body 21 and the cover door 22, wherein the test fixture 30 is disposed inside the box body 21. Through pressing start button, lid door 22 covers under the motion of switching cylinder 23 and closes on box 21, can start the test, has effectively improved work efficiency, sets up safe grating 24 simultaneously, and shielding box 20 will not close the lid when the staff shelters from the grating to prevent the tong, improved the security performance, the practicality is strong.
As shown in fig. 3, further, the inner walls of the box body 21 and the cover door 22 are provided with radiation insulating soundproof cotton 25. So set up, improve syllable-dividing, radiation shielding effect, it is high-efficient convenient.
As shown in fig. 3, the opening and closing cylinder 23 further includes a cylinder 231 and a piston rod 232 sleeved on the cylinder 231, one end of the piston rod 232 is connected to the side surface of the cover door 22, and one end of the cylinder 231 facing away from the piston rod 232 is connected to the side surface of the box body 21. The opening and closing of the cover door 22 are controlled through the opening and closing air cylinder 23, the automation degree is high, the follow-up test is convenient to normally carry out, and the practicability is high.
As shown in fig. 1, a protective cover 26 is further provided outside the opening/closing cylinder 23. The arrangement of the protective cover 26 avoids the damage to the user caused by the mistaken touch when the opening and closing cylinder 23 works, and further improves the safety.
As shown in fig. 4, the jig box 31 is further provided with a plurality of heat dissipating mounting holes 36, and the heat dissipating mounting holes 36 are provided with heat dissipating fans. Set up radiator fan, improve the inside heat energy of shielded cell 20 and remove the effect, and then guarantee that inside components and parts normally work.
As shown in fig. 4, the jig box 31 is further provided with a plurality of wire slots 311, and the output wires 35 are disposed inside the wire slots 311. The wire slots 311 are used for placing the output wires 35 with different lengths, so that the output wires 35 are normally connected with the tested switching power supply 40, and the practicability is high.
As shown in fig. 4, further, the jig box 31 is provided with a plurality of sockets 37 for plugging the switching power supply 40 to be tested. So set up the setting, the manual work is inserted socket 37 with being surveyed switching power supply 40, and the manual work is taken out after the test, improves efficiency of software testing.
As shown in fig. 3 and 4, the jig box 31 is provided with two first handles 50, and the shielding box 20 is provided with two second handles 60. The two first handles 50 of the jig box 31 facilitate the lifting of the test jig 30 according to actual needs or maintenance needs, and the test jig is placed in the shielding box 20 after the maintenance is completed; the two second handles 60 of the shielding box 20 facilitate the movement of the shielding box 20, improve the convenience of operation, and have strong practicability.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The EMI radiation testing equipment for the switching power supply is characterized by comprising a testing cabinet, a shielding box connected with the testing cabinet and a testing jig arranged inside the shielding box; the test cabinet comprises a frequency spectrograph used for detecting and displaying whether a radiation signal of the tested switching power supply exceeds a standard or not; the test fixture comprises a fixture box, a load adjustable resistor, a voltage protocol board and a signal pickup probe, wherein the load adjustable resistor, the voltage protocol board and the signal pickup probe are respectively arranged on the fixture box; the voltage protocol board is connected with a plurality of output lines, the output lines are connected to a switch power supply to be tested, and the signal pickup probe is used for picking up a radiation current signal of the output lines and converting the radiation current signal into a voltage signal for detection of the frequency spectrograph.
2. The switching power supply EMI radiation testing apparatus of claim 1, wherein the testing cabinet further comprises an industrial personal computer, an artificial power supply network, and an isolation filter power supply, the industrial personal computer being respectively connected to the artificial power supply network and the isolation filter power supply.
3. The switching power supply EMI radiation testing equipment according to claim 1, wherein the shielding box includes a box body, a cover door connected above the box body, a plurality of opening and closing cylinders respectively connected with the box body and the cover door, and a safety grating arranged at the front side of the box body and the cover door, and the testing jig is arranged inside the box body.
4. The switching power supply EMI radiation testing apparatus of claim 3, wherein the inner walls of the box and the cover door are each provided with radiation isolation soundproof cotton.
5. The EMI radiation testing device of the switching power supply according to claim 3, wherein the opening/closing cylinder includes a cylinder barrel, a piston rod sleeved on the cylinder barrel, one end of the piston rod is connected to the side of the cover door, and the end of the cylinder barrel away from the piston rod is connected to the side of the box body.
6. The switching power supply EMI radiation testing apparatus of claim 5, wherein a protective cover is provided outside the switching cylinder.
7. The EMI radiation testing device of claim 1, wherein the jig box is provided with a plurality of heat dissipation mounting holes, and the heat dissipation mounting holes are provided with heat dissipation fans.
8. The EMI radiation testing apparatus of claim 1, wherein the jig box is provided with a plurality of wire slots, and the output wires are disposed inside the wire slots.
9. The switching power supply EMI radiation testing apparatus of claim 1, wherein the jig box is provided with a plurality of sockets for plugging the switching power supply to be tested.
10. The switching power supply EMI radiation testing apparatus as claimed in claim 1, wherein the jig box is provided with two first handles, and the shielding box is provided with two second handles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222508941.9U CN218767250U (en) | 2022-09-21 | 2022-09-21 | Switching power supply EMI radiation test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222508941.9U CN218767250U (en) | 2022-09-21 | 2022-09-21 | Switching power supply EMI radiation test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218767250U true CN218767250U (en) | 2023-03-28 |
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ID=85693867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222508941.9U Active CN218767250U (en) | 2022-09-21 | 2022-09-21 | Switching power supply EMI radiation test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218767250U (en) |
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2022
- 2022-09-21 CN CN202222508941.9U patent/CN218767250U/en active Active
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