Mutual inductor
By using fixed components and thermally conductive components in the transformer, heat is transferred to the heat sink and contact heat exchange is achieved, the measurement accuracy and stability problems caused by heat accumulation in traditional transformers are solved, and the effect of rapid cooling and improving stability is achieved.
Patent Information
- Application Number
- CN202421267003.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-04
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-06-04
AI Technical Summary
Traditional transformers generate heat during operation, and long-term heat accumulation will lead to an increase in internal temperature, affecting measurement accuracy and stability.
A transformer is designed, using a fixed component to cooperate with a thermal conduction component and a coil component to transfer heat to the heat dissipation plate through the thermal conduction component, and uses the heat dissipation plate to form contact with external air to exchange heat, thereby achieving rapid cooling.
It effectively reduces the impact of long-term heat accumulation on the measurement accuracy and stability of the transformer, and achieves rapid cooling of heat generated on the operation of the coil assembly.
Smart Images
Figure CN222600688U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of mutual inductors, and in particular to a mutual inductor. Background Art
[0002] The instrument transformer is an indispensable key device in the power system. It converts voltage or current in proportion, converting high voltage or large current into standard low voltage or standard small current, thus realizing the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. The application of this technology not only contributes to the stable operation of the power system, but also provides important technical support for the intelligent and automated management of the power system.
[0003] Most traditional mutual inductors use the principle of electromagnetic induction, using the interaction between the coil and the iron core in the magnetic field to measure and transform voltage or current. This type of mutual inductor has the advantages of simple structure, high reliability, and stable measurement accuracy, and has been widely used in power systems.
[0004] However, when a transformer that uses the principle of electromagnetic induction is working, the current passing through its coil will produce changes in the magnetic flux in the iron core, which in turn will generate eddy currents in the conductor, and at the same time cause the transformer to generate heat during operation. Long-term heat accumulation will cause the internal temperature of the transformer to rise, thereby affecting its measurement accuracy and stability. Utility Model Content
[0005] The purpose of the present application is to solve the problem that the mutual inductor generates heat during operation, and long-term heat accumulation will cause the internal temperature of the mutual inductor to rise, thereby affecting its measurement accuracy and stability. The present application provides a mutual inductor.
[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:
[0007] A mutual inductor comprises a cover body, a base is installed at the bottom of the cover body, a coil assembly is installed between the cover body and the base, a circuit board is fixedly connected to the bottom of the base, a plurality of through holes are evenly opened at one end of the circuit board, a plurality of U-shaped heat transfer plates are symmetrically and evenly fixedly connected to the bottom of the base, one end of the U-shaped heat transfer plate passes through the through hole and extends to the bottom of the circuit board, a heat sink is fixedly connected to the bottom of the U-shaped heat transfer plate, a heat conduction assembly is installed at one end of the U-shaped heat transfer plate, and a fixing assembly for connecting with the cover body is installed at one end of the base.
[0008] By adopting the above technical scheme, by setting the fixed component and the coordinated use of the heat-conducting component and the coil component, it is convenient to use the fixed component to fix the coil component inside the cover body and the base, so that the base can transfer the heat generated by the coil component during operation to the surface of the heat sink in cooperation with the heat-conducting component, and use the heat sink to form contact heat exchange with the external air, thereby achieving rapid cooling of the heat generated by the coil component inside the cover body and the base, and effectively reducing the influence of long-term heat accumulation on the measurement accuracy and stability of the mutual inductor.
[0009] Furthermore, the heat conduction component includes a filling groove symmetrically opened at one end of the U-shaped heat transfer plate, the interior of the filling groove is filled with heat dissipation silicone grease, and two heat dissipation silicone greases are respectively attached to the base and the heat dissipation plate.
[0010] By adopting the above technical solution, by arranging the use of heat dissipation silicone grease in conjunction with the base and the heat dissipation plate, the heat transfer efficiency between the U-shaped heat transfer plate and the base and the heat dissipation plate is effectively improved, and the practicality of the device is improved.
[0011] Furthermore, a plurality of heat dissipation fins are evenly and fixedly connected to the bottom of the heat dissipation plate.
[0012] By adopting the above technical solution, by arranging the cooperation of the heat dissipation fins and the heat dissipation plate, the heat dissipation fins are effectively used to increase the contact area between the heat dissipation plate and the air, thereby improving the heat exchange efficiency of the heat dissipation plate.
[0013] Furthermore, the coil assembly includes a plurality of mounting grooves opened on the top of the base, a plurality of coil frames are symmetrically fixedly connected inside the mounting grooves, a coil body is fixedly connected between two adjacent coil frames, and the coil frame and the coil body are installed inside the cover body.
[0014] By adopting the above technical scheme, by setting the installation groove and cooperating with the coil skeleton and the coil body, it is convenient to pull the coil skeleton and the coil body into the installation groove to form a fixed connection with the base, thereby improving the installation stability of the coil skeleton and the coil body. At the same time, the cover body and the base are fixedly connected with the fixing component, so that the cover body and the base, the coil skeleton and the coil body form a whole, thereby improving the installation convenience of the device.
[0015] Furthermore, the fixing assembly includes connecting ears fixedly connected to the four corners of the base, one end of the connecting ear is provided with a fixing through hole, a fixing bolt is inserted into the fixing through hole, one end of the fixing bolt passes through the fixing through hole and forms a threaded connection with the cover body.
[0016] By adopting the above technical solution, one end of the fixing bolt is pulled through the fixing through hole to form a threaded connection with the cover body, thereby driving the cover body and the base to form a fixed connection, thereby facilitating the fixed connection between the cover body and the base and improving the practicality of the device.
[0017] Furthermore, one end of the coil frame is symmetrically fixedly connected with a coil terminal, the inner bottom of the mounting groove is provided with a plurality of threading holes adapted to the coil terminal, and the top of the circuit board is provided with a plurality of connection points adapted to the coil terminal.
[0018] By adopting the above technical solution, by setting the coil terminal and the coordinated use of the threading hole and the connection point, it is convenient to pull one end of the coil terminal through the threading hole and the connection point to fix it with the circuit board, thereby improving the safety of the coil frame and the coil body without affecting the use of the coil terminal.
[0019] Furthermore, a plurality of heat-conducting grooves are evenly arranged on the inner bottom of the mounting groove.
[0020] By adopting the above technical solution and providing the heat conducting grooves, the heat conduction efficiency between the base and the U-shaped heat transfer plate is further improved.
[0021] Furthermore, the surfaces of the cover body and the circuit board are coated with a silicone rubber insulating coating.
[0022] By adopting the above technical solution, the insulation effect and safety of the cover body and the base surface are effectively improved by providing a silicone rubber insulating coating.
[0023] In summary, the present application includes at least one of the following beneficial effects:
[0024] 1. By setting the fixing component to be used in conjunction with the heat-conducting component and the coil component, it is convenient to use the fixing component to fix the coil component inside the cover and the base, so that the base can transfer the heat generated by the coil component during operation to the surface of the heat sink in conjunction with the heat-conducting component, and use the heat sink to form contact heat exchange with the external air, thereby achieving rapid cooling of the heat generated by the coil component inside the cover and the base, effectively reducing the influence of long-term heat accumulation on the measurement accuracy and stability of the mutual inductor.
[0025] 2. By setting the installation groove and cooperating with the coil skeleton and the coil body, it is convenient to pull the coil skeleton and the coil body into the installation groove to form a fixed connection with the base, thereby improving the installation stability of the coil skeleton and the coil body. At the same time, the cover body and the base are fixedly connected with the fixing component, so that the cover body and the base, the coil skeleton and the coil body form a whole, which improves the installation convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the device body in this application.
[0027] Figure 2 It is an exploded view of the main body of the device in this application.
[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the U-shaped heat transfer plate in this application.
[0029] Description of reference numerals:
[0030] 1. Cover; 2. Base; 3. Circuit board; 4. Through hole; 5. U-shaped heat transfer plate; 6. Heat sink; 7. Filling slot; 8. Heat dissipation silicone grease; 9. Heat dissipation fins; 10. Mounting slot; 11. Coil frame; 12. Coil body; 13. Connecting ear; 14. Fixing through hole; 15. Fixing bolt; 16. Coil terminal; 17. Threading hole; 18. Connection point; 19. Heat conduction groove. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-3 This application is described in further detail.
[0032] The embodiment of the present application discloses a mutual inductor.
[0033] Reference Figure 1-Figure 3 A mutual inductor comprises a cover body 1, a base 2 is installed at the bottom of the cover body 1, a coil assembly is installed between the cover body 1 and the base 2, a circuit board 3 is fixedly connected to the bottom of the base 2, a plurality of through holes 4 are evenly opened at one end of the circuit board 3, a plurality of U-shaped heat transfer plates 5 are symmetrically and evenly fixedly connected to the bottom of the base 2, one end of the U-shaped heat transfer plate 5 passes through the through hole 4 and extends to the bottom of the circuit board 3, a heat dissipation plate 6 is fixedly connected to the bottom of the U-shaped heat transfer plate 5, a heat conduction assembly is installed at one end of the U-shaped heat transfer plate 5, and a fixing assembly for connecting with the cover body 1 is installed at one end of the base 2;
[0034] The heat conducting component includes a filling groove 7 symmetrically opened at one end of the U-shaped heat transfer plate 5, and the filling groove 7 is filled with heat dissipation silicone grease 8. The two heat dissipation silicone greases 8 are respectively attached to the base 2 and the heat dissipation plate 6;
[0035] Furthermore, a plurality of heat dissipation fins 9 are evenly and fixedly connected to the bottom of the heat dissipation plate 6 .
[0036] When in use, first use the fixing assembly to fix the coil assembly inside the cover body 1 and the base 2, so that the cover body 1, the base 2 and the coil assembly form a whole, which is convenient for installation and improves the overall stability of the device;
[0037] Then, when the coil assembly generates heat during operation, the base 2 absorbs the heat generated by the coil assembly and quickly transfers it to the U-shaped heat transfer plate 5 through the heat dissipation silicone grease 8. At the same time, the heat is quickly transferred to the heat dissipation plate 6 through the U-shaped heat transfer plate 5 and the heat dissipation silicone grease 8. Then, the heat dissipation fins 9 are driven to contact with the external air through the heat dissipation plate 6, and the heat dissipation fins 9 are used to increase the contact area between the heat dissipation plate 6 and the external air, so that the heat dissipation plate 6 and the external air form contact heat exchange, thereby realizing the cooling of the surface of the heat dissipation plate 6, thereby facilitating the rapid cooling of the heat generated by the operation of the coil assembly inside the cover body 1 and the base 2, and effectively reducing the influence of long-term heat accumulation on the measurement accuracy and stability of the mutual inductor.
[0038] Reference Figure 1 and Figure 2 The coil assembly includes a plurality of mounting grooves 10 opened on the top of the base 2, a plurality of coil skeletons 11 are symmetrically fixedly connected inside the mounting grooves 10, a coil body 12 is fixedly connected between two adjacent coil skeletons 11, and the coil skeletons 11 and the coil body 12 are installed inside the cover 1;
[0039] In addition, the fixing component includes a connecting ear piece 13 fixedly connected to the four corners of the base 2, one end of the connecting ear piece 13 is provided with a fixing through hole 14, a fixing bolt 15 is inserted into the fixing through hole 14, one end of the fixing bolt 15 passes through the fixing through hole 14 and forms a threaded connection with the cover body 1.
[0040] When in use, first, the coil body 12 is driven to be fixedly connected to the inside of the mounting groove 10 by pulling the coil skeleton 11, and then the cover body 1 is pulled to cover the top of the base 2, and the cover body 1 is made to wrap the coil skeleton 11 and the coil body 12, and then the fixing bolts 15 are pulled through the fixing through holes 14 to form a threaded connection with the cover body 1, thereby fixing the cover body 1 and the base 2, so that the cover body 1 and the base 2, the coil skeleton 11, and the coil body 12 form a whole, making the installation more convenient, and at the same time, the coil skeleton 11 and the coil body 12 are embedded in the mounting groove 10 and fixedly connected to the base 2, so that the devices inside the cover body 1 and the base 2 are installed more firmly.
[0041] Reference Figure 1 and Figure 2 One end of the coil frame 11 is symmetrically fixedly connected with a coil terminal 16 , the inner bottom of the mounting groove 10 is provided with a plurality of threading holes 17 adapted to the coil terminal 16 , and the top of the circuit board 3 is provided with a plurality of connection points 18 adapted to the coil terminal 16 .
[0042] When in use, the coil skeleton 11 is pulled to drive one end of the coil terminal 16 to pass through the threading hole 17 and be fixedly connected to the connection point 18, so that while one end of the coil terminal 16 extends out of the base 2 and is connected to the circuit board 3, the coil skeleton 11 and the coil body 12 are stored inside the cover body 1 and the base 2, thereby improving the safety of use of the coil skeleton 11 and the coil body 12 without affecting the use of the coil terminal 16.
[0043] Reference Figure 1 and Figure 2 A plurality of heat-conducting grooves 19 are evenly arranged on the inner bottom of the mounting groove 10 .
[0044] When in use, by opening a heat-conducting groove 19 at the inner bottom of the installation groove 10, the working heat inside the base 2 can be reduced through the heat-conducting groove 19 and transferred between the base 2 and the U-shaped heat transfer plate 5, thereby further improving the heat transfer efficiency of the base 2.
[0045] Reference Figure 1 and Figure 2 The surfaces of the cover body 1 and the circuit board 3 are coated with a silicone rubber insulating coating.
[0046] When in use, a silicone rubber insulating coating is coated on the surface of the cover body 1 and the circuit board 3, so that an insulating protective layer is formed on the surface of the cover body 1 and the circuit board 3, thereby improving the safety of the device.
[0047] The implementation principle of a mutual inductor in this embodiment is as follows: first, the coil body 12 is driven to be fixedly connected to the inside of the installation groove 10 by pulling the coil skeleton 11, and then the cover body 1 is pulled to cover the top of the base 2, and the cover body 1 forms a wrap around the coil skeleton 11 and the coil body 12, and then the fixing bolts 15 are pulled through the fixing through holes 14 to form a threaded connection with the cover body 1, so that the cover body 1 and the base 2 are fixed, so that the cover body 1 and the base 2, the coil skeleton 11, and the coil body 12 form a whole, and at the same time, the coil skeleton 11 and the coil body 12 are embedded in the installation groove 10 and fixedly connected to the base 2;
[0048] Then, when the coil assembly generates heat, the base 2 absorbs the heat generated by the coil assembly and quickly transfers it to the U-shaped heat transfer plate 5 through the heat dissipation silicone grease 8. At the same time, the heat dissipation silicone grease 8 quickly transfers it to the heat dissipation plate 6 through the U-shaped heat transfer plate 5 and the heat dissipation silicone grease 8. Then, the heat dissipation fins 9 are driven by the heat dissipation plate 6 to contact with the external air, and the heat dissipation fins 9 are used to increase the contact area between the heat dissipation plate 6 and the external air, so that the heat dissipation plate 6 and the external air form contact heat exchange, thereby achieving cooling of the surface of the heat dissipation plate 6.
Claims
1. A mutual inductor, comprising a cover body (1), characterized in that: A base (2) is installed at the bottom of the cover body (1), a coil assembly is installed between the cover body (1) and the base (2), a circuit board (3) is fixedly connected to the bottom of the base (2), a plurality of through holes (4) are evenly opened at one end of the circuit board (3), a plurality of U-shaped heat transfer plates (5) are symmetrically and evenly fixedly connected to the bottom of the base (2), one end of the U-shaped heat transfer plate (5) passes through the through hole (4) and extends to the bottom of the circuit board (3), a heat sink (6) is fixedly connected to the bottom of the U-shaped heat transfer plate (5), a heat conduction assembly is installed at one end of the U-shaped heat transfer plate (5), and a fixing assembly for connecting with the cover body (1) is installed at one end of the base (2).
2. A mutual inductor according to claim 1, characterized in that: The heat conduction component comprises a filling groove (7) symmetrically opened at one end of the U-shaped heat transfer plate (5), the interior of the filling groove (7) is filled with heat dissipation silicone grease (8), and the two heat dissipation silicone greases (8) are respectively attached to the base (2) and the heat dissipation plate (6).
3. A mutual inductor according to claim 1, characterized in that: A plurality of heat dissipation fins (9) are evenly and fixedly connected to the bottom of the heat dissipation plate (6).
4. A mutual inductor according to claim 1, characterized in that: The coil assembly comprises a plurality of mounting grooves (10) formed on the top of the base (2); a plurality of coil frames (11) are symmetrically fixedly connected inside the mounting grooves (10); a coil body (12) is fixedly connected between two adjacent coil frames (11); and the coil frames (11) and the coil body (12) are mounted inside the cover (1).
5. A mutual inductor according to claim 1, characterized in that: The fixing assembly comprises connecting ear pieces (13) fixedly connected to the four corners of the base (2); one end of the connecting ear piece (13) is provided with a fixing through hole (14); a fixing bolt (15) is inserted into the fixing through hole (14); one end of the fixing bolt (15) passes through the fixing through hole (14) and forms a threaded connection with the cover body (1).
6. A mutual inductor according to claim 4, characterized in that: One end of the coil frame (11) is symmetrically fixedly connected to a coil terminal (16); the inner bottom of the mounting groove (10) is provided with a plurality of threading holes (17) adapted to the coil terminal (16); and the top of the circuit board (3) is provided with a plurality of connection points (18) adapted to the coil terminal (16).
7. A mutual inductor according to claim 4, characterized in that: The inner bottom of the installation groove (10) is evenly provided with a plurality of heat-conducting grooves (19).
8. A mutual inductor according to claim 1, characterized in that: The surfaces of the cover body (1) and the circuit board (3) are both coated with a silicone rubber insulating coating.