E-type high-power differential mode inductor with magnetic leakage prevention function
By installing seam edge magnetic strips and tape fixing at the core splicing gap of the E-type inductor, combining the limit structure and titanium material slot, the near-magnetic field leakage problem of the E-type inductor is solved, and a better shielding effect is achieved.
Patent Information
- Application Number
- CN202422288357.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-19
AI Technical Summary
E-type inductors have poor shielding effects in high-frequency and high-power density power converters, resulting in the problem of near-magnetic field leakage.
The seam-edged magnetic strip is used to cover the splicing gap between the two E-shaped magnetic cores, and the outer periphery of the sun-shaped magnetic core is wrapped with tape to fix the seam-edged magnetic strips, which are close to the outer wall of the sun-shaped magnetic core, and combine the limit structure and the slot made of pure titanium to improve the shielding effect.
It effectively reduces near-magnetic field leakage, improves the shielding effect of the inductor, and ensures the stable operation of the circuit.
Smart Images
Figure CN223180951U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of inductors, and particularly relates to an E-type high-power differential-mode inductor with a magnetic leakage prevention function. Background Art
[0002] An inductor, also known as an inductance coil, is a circuit element that can store and release magnetic field energy. When an electric current passes through an inductor, a magnetic field is formed in the coil, and this magnetic field in turn affects the current. This interaction enables the inductor to have the ability to store magnetic field energy. Inductors are one of the commonly used components in electronic circuits, and their main functions include filtering, forming resonant circuits with capacitors, resistors, etc., and isolating AC signals. Therefore, an inductor is not only a circuit element that can store and release energy, but also plays an important role in the circuit.
[0003] The E-type inductor is widely used in high-frequency and high-power density power converters due to its convenient winding and good heat dissipation effect. However, a relatively prominent problem with the E-type inductor is its poor shielding effect, resulting in a large amount of near magnetic field leakage in the power converter. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an E-type high-power differential-mode inductor with a magnetic leakage prevention function to solve the technical problems described in the background art.
[0005] The E-type high-power differential-mode inductor with a magnetic leakage prevention function includes two E-type magnetic cores. The two E-type magnetic cores are symmetrically spliced to form a Japanese-shaped magnetic core with a pillar in the center. A winding is arranged on the pillar. It is characterized in that: a seam edge strip is closely attached to the outer wall of the Japanese-shaped magnetic core, the seam edge magnetic strip covers the splicing gap between the two E-type magnetic cores, and the outer periphery of the Japanese-shaped magnetic core is wound with an adhesive tape for fixing the seam edge strip.
[0006] According to the above technical solution, the utility model has the following beneficial effects:
[0007] In the utility model, the seam edge magnetic strip covers the splicing gap between the two E-type magnetic cores. At the same time, the outer periphery of the Japanese-shaped magnetic core is wound with an adhesive tape to fix the seam edge magnetic strip and closely attach it to the outer wall of the Japanese-shaped magnetic core and tightly cover the splicing gap between the two E-type magnetic cores, thereby reducing near magnetic field leakage and improving the shielding effect.
[0008] In some embodiments, sliding grooves for the two ends of the E-type magnetic core to slide into are provided on both side walls of the seam edge strip, and a limiting portion for preventing the two ends of the E-type magnetic core from sliding out is provided at one end of the sliding groove.
[0009] In some embodiments, a clamping groove is vertically provided at the other end of the sliding groove, and a limiting plate for preventing the E-type magnetic core from sliding out is slid into the clamping groove.
[0010] In some embodiments, locking openings are provided at both ends of the E-shaped magnetic core, and the limiting plate is provided with buckles. After the limiting plate slides into the card slot, the buckles are hooked into the locking openings.
[0011] In some embodiments, the parts of the E-shaped magnetic core and the edge-sealing strip that are in close contact with the outer wall of the U-shaped magnetic core are soft magnetic material bodies of the same or different materials, and the card slot part is a pure titanium material body.
[0012] In some embodiments, an installation groove is provided in the E-shaped magnetic core, and connection plates at both ends of the winding slide into the installation groove. The connection plates are provided with bayonets sleeved on the support columns. The shape of the bayonets is the same as that of the support columns. The connection plates are provided with conductive corners for energizing the circuit board, and the winding is electrically connected to the conductive corners.
[0013] In some embodiments, support columns for fixing to the circuit board are installed on the connection plates. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the specific embodiments of the present invention, the following will briefly describe the drawings and reference numerals required in the description of the specific embodiments.
[0015] Figure 1 is the front sectional view of the present invention;
[0016] Figure 2 is the top sectional view of the present invention;
[0017] Figure 3 is the top sectional view of the chute part of the present invention.
[0018] REFERENCE NUMERALS:
[0019] 1. U-shaped magnetic core; 11. Support column; 2. E-shaped magnetic core; 21. Splicing gap; 22. Locking opening; 23. Installation groove; 3. Winding; 4. Edge-sealing strip; 41. Chute; 42. Limiting part; 43. Card slot; 44. Limiting plate; 441. Buckle; 5. Adhesive tape; 6. Connection plate; 61. Bayonet; 62. Conductive corner; 63. Support column. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.
[0021] As Figures 1 to 3As shown in the figure, the present utility model provides an E-type high-power differential mode inductor with an anti-magnetic leakage function, which includes two E-type magnetic cores 2. The two E-type magnetic cores 2 are symmetrically spliced to form a figure-eight magnetic core 1 with a pillar 11 in the center. A winding 3 is arranged on the pillar 11. It is characterized in that: a seam edge strip 4 is closely attached to the outer wall of the figure-eight magnetic core 1, and the seam edge magnetic strip covers the splicing gap 21 between the two E-type magnetic cores 2. An adhesive tape 5 for fixing the seam edge strip 4 is wound around the outer periphery of the figure-eight magnetic core 1.
[0022] In the present utility model, the seam edge magnetic strip covers the splicing gap 21 between the two E-type magnetic cores 2. At the same time, the adhesive tape 5 is wound around the outer periphery of the figure-eight magnetic core 1 to fix the seam edge magnetic strip and closely attach it to the outer wall of the figure-eight magnetic core 1 and tightly cover the splicing gap 21 between the two E-type magnetic cores 2, thereby reducing the near magnetic field leakage and improving the shielding effect.
[0023] In this embodiment, sliding grooves 41 for allowing the two ends of the E-type magnetic core 2 to slide in are provided on both side walls of the seam edge strip 4. A limiting portion 42 for preventing the two ends of the E-type magnetic core 2 from sliding out is provided at one end of the sliding groove 41. After the two E-type magnetic cores 2 are symmetrically spliced, the seam edge strip 4 can symmetrically cover the splicing gap 21 between the two E-type magnetic cores 2, and at the same time, the seam edge strip 4 and the two E-type magnetic cores 2 can be stably fixed. In addition, after the E-type magnetic core 2 slides into one end of the sliding groove 41, the limiting portion 42 can effectively limit the E-type magnetic core 2 from sliding out of the other end of the sliding groove 41.
[0024] In this embodiment, a clamping groove 43 is vertically provided at the other end of the sliding groove 41. A limiting plate 44 for preventing the E-type magnetic core 2 from sliding out is slid into the clamping groove 43. After the E-type magnetic core 2 slides into one end of the sliding groove 41, the limiting portion 42 restricts the E-type magnetic core 2 from sliding out of the other end of the sliding groove 41. At the same time, the limiting plate 44 is slid into the clamping groove 43. At this time, the limiting plate 44 can limit the E-type magnetic core 2 from sliding out of the end where it slides into the sliding groove 41, thereby realizing the fixed limit of both ends of the E-type magnetic core 2.
[0025] In this embodiment, locking openings 22 are provided at both ends of the E-type magnetic core 2. The limiting plate 44 is provided with a buckle 441. After the limiting plate 44 slides into the clamping groove 43, the buckle 441 is hooked into the locking opening 22, thereby realizing the fixation of the limiting plate 44.
[0026] In this embodiment, the parts of the E-type magnetic core 2 and the seam edge strip 4 that are closely attached to the outer wall of the figure-eight magnetic core 1 are soft magnetic material bodies of the same or different materials. The clamping groove 43 part is a pure titanium material body to more stably reduce the near magnetic field leakage and improve the shielding effect. At the same time, the clamping groove 43 part of the pure titanium material body can effectively reduce the interference with the magnetic field of the E-type magnetic core 2.
[0027] In this embodiment, an installation groove 23 is provided in the E-shaped magnetic core 2. The installation groove 23 is made of pure titanium. A connection plate 6 located at both ends of the winding 3 slides into the installation groove 23. The connection plate 6 is provided with a bayonet 61 that is sleeved on the support pillar 11. The shape of the bayonet 61 conforms to that of the support pillar 11. The connection plate 6 is provided with a conductive corner 62 for energizing the circuit board, and the winding 3 is electrically connected to the conductive corner 62; so that the connection plate 6 can be conveniently and firmly installed at both ends of the winding 3.
[0028] In this embodiment, a support pillar 63 for fixing to the circuit board is installed on the connection plate 6; so that after the present utility model is installed on the circuit board, stable support and fixation can be obtained through the support pillar 63.
Claims
1. An E-type high-power differential-mode inductor with an anti-magnetic leakage function, which comprises two E-type magnetic cores (2). The two E-type magnetic cores (2) are symmetrically spliced to form an E-shaped magnetic core (1) with a pillar (11) in the center. A winding (3) is arranged on the pillar (11), and it is characterized in that: The outer wall of the U-shaped core (1) is closely attached with a seam edge strip (4). The seam edge strip covers the splicing gap (21) between the two E-shaped cores (2). An adhesive tape (5) for fixing the seam edge strip (4) is wound around the outer periphery of the U-shaped core (1).
2. The E-type high-power differential-mode inductor with anti-magnetic leakage function according to claim 1, wherein: Both side walls of the seam edge strip (4) are provided with sliding grooves (41) for the two ends of the E-shaped core (2) to slide into. One end of the sliding groove (41) is provided with a limiting portion (42) for preventing the two ends of the E-shaped core (2) from sliding out.
3. The E-type high-power differential-mode inductor with a magnetic leakage prevention function according to claim 2, wherein: The other end of the sliding groove (41) is vertically provided with a clamping groove (43). A limiting plate (44) for preventing the E-shaped core (2) from sliding out is slid into the clamping groove (43).
4. The E-type high-power differential-mode inductor with anti-magnetic leakage function according to claim 3, characterized in that: The two ends of the E-shaped core (2) are provided with locking openings (22). The limiting plate (44) is provided with a clamping buckle (441). After the limiting plate (44) slides into the clamping groove (43), the clamping buckle (441) is hooked into the locking opening (22).
5. The E-type high-power differential-mode inductor with anti-magnetic leakage function according to claim 4, characterized in that: The parts of the E-shaped core (2) and the seam edge strip (4) that are closely attached to the outer wall of the U-shaped core (1) are soft magnetic material bodies of the same or different materials. The clamping groove part is a pure titanium material body.
6. The E-type high-power differential-mode inductor with magnetic leakage prevention function according to any one of claims 1 to 5, characterized in that: An installation groove (23) is provided in the E-shaped core (2). Connection plates (6) at both ends of the winding (3) are slid into the installation groove (23). The connection plates (6) are provided with clamping openings (61) sleeved on the support columns (11). The shape of the clamping openings (61) is adapted to the outer peripheral shape of the support columns (11). The connection plates (6) are provided with conductive corners (62) for energizing the circuit board. The winding (3) is electrically connected to the conductive corners (62).
7. The E-type high-power differential-mode inductor with anti-magnetic leakage function according to claim 6, characterized in that: Support columns (63) for fixing to the circuit board are installed on the connection plates (6).