Anti-interference structure of transformer

Abstract

The utility model relates to the technical field of transformer anti-interference, and discloses a transformer anti-interference structure which comprises a bottom insulating plate and a PCB located on the upper side of the bottom insulating plate, a transformer is fixedly connected to one side of the bottom insulating plate, a plurality of connecting cylinders are arranged on the outer side of the transformer, and a fixing ring is fixedly connected to the upper side of the bottom insulating plate. A plurality of through holes are formed in the fixing ring, steel wire ropes are sequentially arranged between the connecting cylinders and the through holes in an up-down penetrating mode, and a secondary shielding mechanism for shielding an electromagnetic field generated by the transformer is arranged on the upper side of the transformer. The magnetic field generated by the transformer can be shielded, vibration and noise generated when the transformer works can be reduced, and high practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer anti-interference shielding structures, in particular to a transformer anti-interference structure. Background Art

[0002] When the transformer is working, the current flows in the wires, generating strong magnetic and electric fields. These electromagnetic waves will radiate into the surrounding space, thereby interfering with surrounding electrical appliances, causing fluctuations in radio signals and abnormal operation of other electronic components. In the digital age of the Internet of Everything, the signals sent to the transformer through industrial communications are likely to cause the power supply output accuracy to decrease or the transformer cannot be properly regulated due to interference. Although the existing anti-interference transformers have achieved anti-interference and shielding effects through special designs, there is no effective solution to the vibration noise problem generated when the transformer is working, and the high-frequency vibration of the transformer will seriously affect the stability and service life of the equipment.

[0003] For example, a low-interference power transformer is disclosed in a Chinese utility model patent with announcement number CN203706780U. Although the scheme can effectively perform electrostatic shielding and prevent common-mode interference between windings by using a transformer winding isolation layer, the three-layer structure of the isolation layer is wound around the surface of the winding coil, the outer two layers are polyester fiber, and the inner layer is an imide film, and the shock-absorbing design of the transformer is achieved through a base made of rubber and soft silicone. In this way, the isolation layer composed of polyester fiber and imide film can only play an anti-interference effect, and is of no benefit to the vibration and noise problems caused when current flows through the coil. Based on this, a transformer anti-interference structure that can simultaneously absorb shock, reduce noise and shield is proposed. Utility Model Content

[0004] In order to solve the technical problem of a transformer anti-interference structure, the utility model provides a transformer anti-interference structure.

[0005] The utility model is implemented by the following technical scheme: a transformer anti-interference structure, comprising a bottom insulating plate and a PCB circuit board located on the upper side thereof, a transformer is fixedly connected to one side of the bottom insulating plate, a plurality of connecting cylinders are arranged on the outer side of the transformer, a fixing ring is fixedly connected to the upper side of the bottom insulating plate, a plurality of through holes are opened on the fixing ring, steel wire ropes are successively passed through the upper and lower parts of the plurality of connecting cylinders and the through holes, a secondary shielding mechanism for shielding the electromagnetic field generated by the transformer is arranged on the upper side of the transformer, a tertiary shielding mechanism for reducing magnetic field interference by grounding the transformer is arranged on one side of the plurality of connecting cylinders, and a circuit board safety mechanism for keeping a safe distance between the transformer and the PCB circuit board is arranged on one side of the bottom insulating plate.

[0006] Through the above technical solution, when the number of coils of the steel wire rope around the copper-clad shielding plate becomes denser and denser, it is equivalent to setting a circle of metal shielding belt around the transformer.

[0007] As a further improvement of the above solution, the secondary shielding mechanism includes a copper-clad shielding plate fixedly connected to one side of the plurality of connecting tubes.

[0008] As a further improvement of the above scheme, the three-level shielding mechanism includes a plurality of upper grounding pins fixedly connected to the outer side of the copper-clad shielding plate, the outer side of the fixing ring is fixedly connected to a plurality of lower grounding pins fixedly connected to the upper side of the bottom insulating plate, and a grounding pin connecting mechanism for grounding the transformer shielding device is provided between the lower grounding pins and the upper grounding pins.

[0009] As a further improvement of the above solution, the ground pin connection mechanism includes a plurality of supporting copper studs respectively arranged one-to-one between the upper ground pins and the lower ground pins.

[0010] As a further improvement of the above-mentioned scheme, the circuit board safety mechanism includes a plurality of second connection sockets fixedly connected to the lower side of the copper-clad shielding plate, and a plurality of first connection sockets fixedly connected to the upper side of the PCB circuit board, and corresponding connecting copper bars are respectively arranged between the plurality of first connection sockets and the second connection sockets.

[0011] As a further improvement of the above solution, an inductor module is fixedly connected to the upper side of the PCB circuit board.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model arranges a ring-shaped spring-shaped steel wire rope around the fixing ring and the copper-clad shielding plate. When the number of turns of the steel wire rope increases, it can form a shielding effect on the electromagnetic field of the transformer and improve the anti-interference ability.

[0014] 2. When the transformer coil current load is large and unstable, when the magnetic field direction changes, or after the core is magnetized, a self-excited vibration is generated in the core due to the alternating change of the magnetic field direction, etc., which will cause the transformer to generate high-frequency vibration during operation. The annular spring-shaped steel wire rope provided in the utility model can effectively absorb vibration energy and reduce noise through the mutual friction between the front and rear steel wire rope coils and the toughness of the steel wire rope itself, thereby effectively protecting the internal equipment of the transformer and extending the service life of the transformer.

[0015] 3. Modern transformers all use remote communication for digital control. When the magnetic field generated by the transformer is shielded by the steel wire rope and the copper-clad shielding plate above, the interference of the magnetic field on the signal transmitted to the PCB circuit board can be reduced, the signal strength of the transformer remote communication can be improved, and the transformer power output accuracy can be higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A front view of a transformer anti-interference structure provided by the utility model;

[0017] Figure 2 A top view of a transformer anti-interference structure provided by the utility model;

[0018] Figure 3 The utility model provides a front view of an embodiment of a transformer anti-interference structure.

[0019] Description of main symbols:

[0020] 1. Bottom insulation board; 2. Inductor module; 3. PCB circuit board; 4. First connection seat; 5. Connecting copper busbar; 6. Second connection seat; 7. Lower ground pin; 8. Transformer; 9. Through hole; 10. Fixing ring; 11. Wire rope; 12. Supporting copper stud; 13. Upper ground pin; 14. Connecting tube; 15. Copper-clad shielding plate; 16. Exhaust fan; 17. Chassis; 18. Aluminum radiator; 19. Filter. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0022] Example:

[0023] Please combine Figure 1-Figure 3A transformer anti-interference structure of the present embodiment includes a bottom insulating plate 1 and a PCB circuit board 3 located on the upper side thereof, a transformer 8 is fixedly connected to one side of the bottom insulating plate 1, a plurality of connecting cylinders 14 are arranged on the outer side of the transformer 8, a fixing ring 10 is fixedly connected to the upper side of the bottom insulating plate 1, a plurality of through holes 9 are opened on the fixing ring 10, a plurality of connecting cylinders 14 and the through holes 9 are successively penetrated by steel wire ropes 11 on the upper and lower sides, a secondary shielding mechanism for shielding the electromagnetic field generated by the transformer 8 is arranged on the upper side of the transformer 8, a tertiary shielding mechanism for reducing magnetic field interference by grounding the transformer 8 is arranged on one side of the plurality of connecting cylinders 14, a circuit board safety mechanism for keeping the transformer 8 at a safe distance from the PCB circuit board 3 is arranged on one side of the bottom insulating plate 1, and the secondary shielding mechanism includes a plurality of connecting cylinders 14 fixed together with one side of the plurality of connecting cylinders 14. A copper-clad shielding plate 15 connected, the three-level shielding mechanism includes a plurality of upper grounding pins 13 fixedly connected to the outer side of the copper-clad shielding plate 15, a plurality of lower grounding pins 7 fixedly connected to the upper side of the bottom insulating plate 1 are fixedly connected to the outer side of the fixing ring 10, a grounding pin connecting mechanism for grounding the shielding device of the transformer 8 is arranged between the lower grounding pins 7 and the upper grounding pins 13, the grounding pin connecting mechanism includes a plurality of supporting copper studs 12 respectively corresponding to each other arranged between the plurality of upper grounding pins 13 and the lower grounding pins 7, the circuit board safety mechanism includes a plurality of second connecting seats 6 fixedly connected to the lower side of the copper-clad shielding plate 15, a plurality of first connecting seats 4 fixedly connected to the upper side of the PCB circuit board 3, a corresponding connecting copper bus 5 is respectively arranged between the plurality of first connecting seats 4 and the second connecting seats 6, and an inductor module 2 is fixedly connected to the upper side of the PCB circuit board 3.

[0024] Please combine Figure 3 As shown, the transformer anti-interference structure is placed at the bottom of the chassis 17, and the lower grounding pin 7 and the supporting copper stud 12 and the chassis 17 can be designed as a passage to connect to the ground to improve the anti-interference ability; an aluminum radiator 18 is arranged inside the chassis 17, and an exhaust fan 16 is arranged on the side of the chassis 17, so that the transformer 8 can be cooled and dissipated when working. By arranging a filter 19 on the side of the chassis 17, dust in the external air can be filtered to prevent dust from entering the transformer 8 and affecting the performance; in addition, the number of turns of the wire rope 11 should be set to comprehensively consider the anti-interference ability and the heat dissipation and ventilation ability. When the number of turns of the wire rope 11 is denser, the shielding ability of the electromagnetic field is enhanced at this time, but it causes the heat generated by the inside of the wire rope 11, that is, the heat exchange with the outside world is blocked. In view of this, the user should be based on the actual working scene that the transformer 8 may face, and through repeated experiments, the optimal number of turns of the wire rope 11 and the optimal material selection of the metal wire rope 11 under this scene while ensuring the heat dissipation and electromagnetic anti-interference ability of the transformer 8.

[0025] The implementation principle of a transformer anti-interference structure in the embodiment of the present application is: when the transformer 8 is working, according to Faraday's law of electromagnetic induction, an electromagnetic field will be formed in the space around the transformer 8. First, the copper-clad shielding plate 15 can be used to shield the magnetic field space on the upper layer of the transformer 8. Then, the steel wire rope 11 arranged around the transformer 8 can be used to shield the magnetic field in the space around the transformer 8. Finally, the copper-clad shielding plate 15 and the lower grounding pin 7 are connected to the ground through the supporting copper studs 12, which can further improve the anti-interference ability of the transformer 8.

[0026] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A transformer anti-interference structure, comprising a bottom insulating plate (1) and a PCB circuit board (3) located on the upper side thereof, It is characterized in that A transformer (8) is fixedly connected to one side of the bottom insulating plate (1), a plurality of connecting cylinders (14) are arranged on the outside of the transformer (8), a fixing ring (10) is fixedly connected to the upper side of the bottom insulating plate (1), a plurality of through holes (9) are opened on the fixing ring (10), steel wire ropes (11) are successively passed through the plurality of connecting cylinders (14) and the through holes (9) from top to bottom, a secondary shielding mechanism for shielding the electromagnetic field generated by the transformer (8) is arranged on the upper side of the transformer (8), a tertiary shielding mechanism for reducing magnetic field interference by grounding the transformer (8) is arranged on one side of the plurality of connecting cylinders (14), and a circuit board safety mechanism for maintaining a safe distance between the transformer (8) and the PCB circuit board (3) is arranged on one side of the bottom insulating plate (1).

2. A transformer anti-interference structure as claimed in claim 1, It is characterized in that The secondary shielding mechanism comprises a copper-clad shielding plate (15) fixedly connected to one side of a plurality of connecting cylinders (14).

3. A transformer anti-interference structure as claimed in claim 2, It is characterized in that The three-level shielding mechanism comprises a plurality of upper grounding pins (13) fixedly connected to the outer side of the copper-clad shielding plate (15); the outer side of the fixing ring (10) is fixedly connected to a plurality of lower grounding pins (7) fixedly connected to the upper side of the bottom insulating plate (1); and a grounding pin connection mechanism for grounding the shielding device of the transformer (8) is provided between the lower grounding pins (7) and the upper grounding pins (13).

4. A transformer anti-interference structure as claimed in claim 3, It is characterized in that The ground pin connection mechanism comprises a plurality of supporting copper studs (12) arranged between the upper ground pins (13) and the lower ground pins (7) and corresponding to each other.

5. A transformer anti-interference structure as claimed in claim 2, It is characterized in that The circuit board safety mechanism comprises a plurality of second connection seats (6) fixedly connected to the lower side of the copper-clad shielding plate (15), a plurality of first connection seats (4) fixedly connected to the upper side of the PCB circuit board (3), and a one-to-one corresponding connection copper busbar (5) is respectively arranged between the plurality of first connection seats (4) and the second connection seats (6).

6. A transformer anti-interference structure as claimed in claim 1, It is characterized in that An inductor module (2) is fixedly connected to the upper side of the PCB circuit board (3).

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