Winding inductor

Abstract

The utility model discloses a turn inductor, and relates to the technical field of inductors. According to the technical scheme, the magnetic core comprises a bottom plate, an annular magnetic core is arranged on the surface of the bottom plate, a plurality of winding sets are arranged on the bottom plate, each winding set is formed by winding a wire with a trapezoidal cross section, the winding sets penetrate through the bottom plate and are wound on the magnetic core, each winding set comprises first U-shaped wires located at the two ends of the winding set, and the first U-shaped wires are arranged on the bottom plate. A plurality of first U-shaped wires are arranged between the first U-shaped wires, a plurality of second U-shaped wires are arranged between the two first U-shaped wires, the widths of the outer side walls of the first U-shaped wires and the second U-shaped wires are smaller than the widths of the inner side walls of the first U-shaped wires and the second U-shaped wires, and the connecting wires are used for connecting the first U-shaped wires with the adjacent second U-shaped wires and connecting the two adjacent second U-shaped wires. The utility model aims to provide a turn inductor.

Description

Technical Field

[0001] The utility model relates to the technical field of inductance, and more particularly to a turn-wound inductance. Background Art

[0002] Inductor is a component that can convert electrical energy into magnetic energy and store it. It consists of a magnetic core and a wire winding. The inductance of a toroidal inductor depends on the inductance of the magnetic core and the number of turns of the winding. It is calculated according to the following formula: L = AL * N 2 , where: L - the inductance of the toroidal inductor; AL - the inductance of the magnetic core; N - the number of turns of the winding. From the above formula, it can be seen that the inductance of the inductor is proportional to the inductance of the magnetic core and proportional to the square of the number of turns; the inductance formula of the magnetic core is as follows: AL = μ*A / l; AL - the inductance of the magnetic core; μ - magnetic permeability; A - the cross-sectional area of ​​the magnetic core; l - the length of the magnetic path. From the formula of the magnetic core inductance, it can be seen that the inductance of the magnetic core is inversely proportional to the length of the magnetic path.

[0003] The cost of an inductor depends on the cost of the core and wire. If the core and wire materials remain the same, cost savings are often achieved by reducing the core size or the wire size. However, these cost-cutting measures often result in a decrease in inductance, which in turn affects the inductor's performance.

[0004] Therefore, a new technical solution is urgently needed to solve the above technical problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a turn-to-turn inductor.

[0006] The above technical objectives of the present utility model are achieved through the following technical solutions: a turn-wound inductor, including a base plate, a ring-shaped magnetic core is provided on the surface of the base plate, and a plurality of winding groups are provided on the base plate, the winding groups are wound by wires with trapezoidal cross-sections, the winding groups pass through the base plate and are wound around the magnetic core, the winding groups include a first U-shaped wire located at both ends thereof, and a plurality of second U-shaped wires are further provided between the two first U-shaped wires, the width of the outer side walls of the first U-shaped wire and the second U-shaped wire is smaller than the width of the inner side walls thereof, and also include a connecting wire for connecting the first U-shaped wire and the adjacent second U-shaped wire and two adjacent second U-shaped wires.

[0007] By adopting the above technical solution, the inner diameter of the magnetic core can be reduced by using a winding group formed by winding a wire with a trapezoidal cross-section, thereby increasing the inductance. In addition, the volume of the winding group can be reduced while the vertical cross-sectional area of ​​the wire remains unchanged. As can be seen from Formula S1, the inductance is related to the vertical cross-sectional area of ​​the wire. Therefore, when the vertical cross-sectional area of ​​the wire remains unchanged, the inductance remains unchanged, thereby reducing the production cost while ensuring the inductance.

[0008] The present invention is further configured as follows: a first notch is provided at one end of the first U-shaped wire, a second notch is provided at both ends of the second U-shaped wire, and a third notch is provided at both ends of the connecting wire for mating with the first or second notch.

[0009] The utility model is further configured as follows: the bottom plate is provided with a plurality of trapezoidal openings for the first U-shaped conductor and the second U-shaped conductor to pass through.

[0010] The utility model is further configured as follows: after the third notch at one end of the connecting wire at both ends of each group of the winding group is plugged into the first notch at one end of the first U-shaped wire, the connection is fixed by welding; after the third notch at the other end is plugged into the first notch at one end of the second wire, the connection is fixed by welding; after the third notch of the remaining connecting wires of each group of the winding group are respectively connected to the second notches at one end of two adjacent second U-shaped wires, the connection is fixed by welding.

[0011] The utility model is further configured as follows: the surface of the base plate is provided with a limiting ring covering the outer circumferential wall of the magnetic core; the surface of the base plate is located on the inner side of the magnetic core and is provided with a plurality of limiting blocks arranged in a ring shape; the outer circumferential wall of the limiting block abuts against the inner circumferential wall of the magnetic core.

[0012] The present invention is further configured as follows: each set of the limiting blocks corresponds to each winding group, and the limiting blocks are provided with a trapezoidal through slot connected to the corresponding trapezoidal opening for the first U-shaped wire and the second U-shaped wire to pass through.

[0013] The utility model has the following beneficial effects: by using a winding group formed by winding a conductor with a trapezoidal cross-section, the inner diameter of the magnetic core can be reduced, thereby improving the inductance, and the volume of the winding group is reduced when the vertical cross-sectional area of ​​the conductor remains unchanged. It can be seen from formula S1 that the inductance is related to the vertical cross-sectional area of ​​the conductor. Therefore, when the vertical cross-sectional area of ​​the conductor remains unchanged, the inductance remains unchanged, thereby reducing the production cost while ensuring the inductance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the three-dimensional structure of this embodiment;

[0015] Figure 2Schematic diagram of the bottom structure of this embodiment;

[0016] Figure 3 Schematic diagram of the structure of the first U-shaped conductor in this embodiment;

[0017] Figure 4 Schematic diagram of the structure of the second U-shaped conductor in this embodiment;

[0018] Figure 5 This is a schematic structural diagram of the connecting wires in this embodiment;

[0019] Figure 6 Schematic diagram of the structure of the bottom plate of this embodiment;

[0020] Figure 7 Schematic diagram of the top view of the structure of this embodiment;

[0021] Figure 8 for Figure 7 A partial enlarged schematic diagram.

[0022] Description of the drawings: 1. Base plate; 2. Magnetic core; 3. Winding group; 4. First U-shaped conductor; 5. Second U-shaped conductor; 6. Connecting conductor; 7. First incision; 8. Second incision; 9. Third incision; 10. Trapezoidal opening; 11. Limiting ring; 12. Limiting block; 13. Trapezoidal through groove. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings.

[0024] Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0025] As shown in the figure, a turn-wound inductor includes a base plate 1, a ring-shaped magnetic core 2 is provided on the surface of the base plate 1, and three groups of winding groups 3 are evenly arranged on the base plate 1 along its circumferential direction. The winding groups 3 are wound by wires with trapezoidal cross-sections. The winding groups 3 pass through the base plate 1 and are wound around the magnetic core 2. The winding groups 3 include first U-shaped wires 4 located at both ends thereof, and a plurality of second U-shaped wires 5 are further arranged between the two first U-shaped wires 4. The width of the outer wall of the first U-shaped wire 4 and the second U-shaped wire 5 is smaller than the width of the inner wall thereof. The inductor also includes a connecting wire 6 for connecting the first U-shaped wire 4 with the adjacent second U-shaped wire 5 and two adjacent second U-shaped wires 5. The connecting wire 6 is arranged in an S shape.

[0026] The width H22 of the outer wall of the first U-shaped conductor 4 and the second U-shaped conductor 5 is smaller than the width H11 of the inner wall thereof, and the gap T11 between the two adjacent first U-shaped conductors 4 and the second U-shaped conductors 5 on the inner side of the magnetic core 2 is released. While T11 still maintains a small value, the inner diameter D11 of the magnetic core can shrink inward, thereby effectively reducing the inner diameter of the magnetic core.

[0027] According to the inductance calculation formula S1: L1 = AL1 * N12 = (μ1 * A1 / l1) * N1 2 =(μ1*B1*B2 / l1)*N1 2 (L1 - inductance of the inductor; N1 - number of turns of the inductor wire; AL1 - inductance of the core; μ1 - magnetic permeability of the core; A1 - cross-sectional area of ​​the core; l1 - magnetic path length of the core; B1 - cross-sectional width of the core; B2 - cross-sectional height of the core). It can be seen that when the inner diameter D11 of the core is reduced, the magnetic path length l1 is also reduced, that is, under the condition that the magnetic permeability and vertical cross-sectional area of ​​the core are the same, the inductance can be increased.

[0028] By using a conductor with a trapezoidal cross-section, the volume of the winding group 3 is reduced while the vertical cross-sectional area of ​​the conductor remains unchanged. As can be seen from Formula S1, the inductance is related to the vertical cross-sectional area of ​​the conductor. Therefore, when the vertical cross-sectional area of ​​the conductor remains unchanged, the inductance remains unchanged, thereby reducing the production cost while ensuring the inductance.

[0029] A first incision 7 is provided at one end of the first U-shaped conductor 4, a second incision 8 is provided at both ends of the second U-shaped conductor 5, and a third incision 9 is provided at both ends of the connecting conductor 6 to be plugged into the first incision 7 or the second incision 8. The bottom plate 1 is provided with a plurality of trapezoidal openings 10 for the first U-shaped conductor 4 and the second U-shaped conductor 5 to pass through.

[0030] After passing both ends of the first U-shaped wire 4 and the second U-shaped wire 5 through the trapezoidal opening 10, the first U-shaped wire 4 and the second U-shaped wire 5 are connected through the connecting wire 6, so that the ends of the two first U-shaped wires 4 not connected to the connecting wire 6 form an input end and an output end.

[0031] After the third notch 9 at one end of the connecting wire 6 at both ends of each winding group 3 is plugged into the first notch 7 at one end of the first U-shaped wire 4, the connection is fixed by welding, and the third notch 9 at the other end is plugged into the first notch 7 at one end of the second wire and the connection is fixed by welding; the third notch 9 of the remaining connecting wires 6 of each winding group 3 are respectively connected to the second notches 8 at one end of two adjacent second U-shaped wires 5 and the connection is fixed by welding, which can ensure the stability of the turn inductor after installation.

[0032] The surface of the base plate 1 is provided with a limiting ring 11 covering the outer circumferential wall of the magnetic core 2. The surface of the base plate 1 is located on the inner side of the magnetic core 2 and three annular limiting blocks 12 are evenly arranged along its circumferential direction. The outer circumferential wall of the limiting block 12 abuts against the inner circumferential wall of the magnetic core, thereby ensuring the accuracy of the installation position of the magnetic core and improving its stability after installation.

[0033] Each set of limiting blocks 12 corresponds to each winding set. The limiting blocks 12 are provided with trapezoidal through slots 13 connected to the corresponding trapezoidal openings 10 for the first U-shaped wire 4 and the second U-shaped wire 5 to pass through, thereby further improving the stability of the winding set after installation.

[0034] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the embodiments as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A turn-wound inductor, characterized in that: The invention comprises a base plate (1), a ring-shaped magnetic core (2) is provided on the surface of the base plate (1), a plurality of winding groups (3) are provided on the base plate (1), the winding groups (3) are formed by winding wires with trapezoidal cross sections, the winding groups (3) pass through the base plate (1) and are wound around the magnetic core (2), the winding groups (3) include first U-shaped wires (4) at both ends thereof, a plurality of second U-shaped wires (5) are provided between the two first U-shaped wires (4), the width of the outer side walls of the first U-shaped wires (4) and the second U-shaped wires (5) is smaller than the width of the inner side walls thereof, and the invention also comprises a connecting wire (6) for connecting the first U-shaped wire (4) and the adjacent second U-shaped wires (5) and two adjacent second U-shaped wires (5).

2. The turn-wound inductor according to claim 1, characterized in that: A first notch (7) is provided at one end of the first U-shaped conductor (4), a second notch (8) is provided at both ends of the second U-shaped conductor (5), and a third notch (9) is provided at both ends of the connecting conductor (6) for plugging into the first notch (7) or the second notch (8).

3. The turn-wound inductor according to claim 2, characterized in that: The bottom plate (1) is provided with a plurality of trapezoidal openings (10) for the first U-shaped conductor (4) and the second U-shaped conductor (5) to pass through.

4. The turn-wound inductor according to claim 3, characterized in that: The third notch (9) at one end of the connecting wire (6) at both ends of each winding group (3) is plugged into the first notch (7) at one end of the first U-shaped wire (4) and fixedly connected by welding; the third notch (9) at the other end is plugged into the first notch (7) at one end of the second wire and fixedly connected by welding; the third notch (9) of the remaining connecting wires (6) of each winding group (3) are respectively connected to the second notches (8) at one end of two adjacent second U-shaped wires (5) and fixedly connected by welding.

5. The turn-wound inductor according to claim 4, characterized in that: The surface of the base plate (1) is provided with a limiting ring (11) covering the circumferential outer wall of the magnetic core (2); the surface of the base plate (1) is provided with a plurality of limiting blocks (12) arranged in an annular shape on the inner side of the magnetic core (2); the circumferential outer wall of the limiting block (12) abuts against the circumferential inner wall of the magnetic core (2).

6. The turn-wound inductor according to claim 5, characterized in that: Each set of the limiting blocks (12) corresponds to each set of winding groups (3), and the limiting blocks (12) are provided with a trapezoidal through slot (13) connected to the corresponding trapezoidal opening (10) for the first U-shaped conductor (4) and the second U-shaped conductor (5) to pass through.

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