Common mode inductor utilizing leakage inductance

Abstract

The utility model discloses a common mode inductor utilizing leakage inductance, which belongs to the technical field of inductors and comprises a mounting plate, a fixing block is fixedly connected to the top of the mounting plate, a common mode inductor assembly is fixedly connected to the top of the fixing block, and the common mode inductor assembly comprises a first magnetic core fixed to the top of the fixing block. A first coil and a second coil are wound on the outer side wall of the first magnetic core, and the outer side wall of the second coil is sleeved with a differential mode inductor assembly. According to the common-mode inductor utilizing leakage inductance, the common-mode inductor assembly, the first magnetic core, the first coil, the second coil and the differential-mode inductor assembly form a dual-mode inductor, the differential-mode inductor assembly is wound through the second coil, and when the second coil is wound on the outer side wall of the first magnetic core, the differential-mode inductor assembly is arranged on the outer side wall of the second coil in a sleeving mode; therefore, integration of the common-mode inductor and the differential-mode inductor is achieved in the same inductor, common-mode noise and differential-mode noise can be restrained at the same time, and the restraining effect on differential-mode interference is enhanced through leakage inductance.

Description

Technical Field

[0001] The utility model belongs to the technical field of inductors, and in particular relates to a common-mode inductor utilizing leakage inductance. Background Art

[0002] In modern electronic devices and power systems, suppressing electromagnetic interference is a major challenge, especially in the fields of electric vehicles, power electronics equipment, and communication equipment;

[0003] Traditional common-mode inductors are primarily used to suppress common-mode noise. However, as equipment operating frequencies increase and electromagnetic environments become more complex, existing common-mode inductors are prone to saturation in high-frequency environments. Furthermore, as equipment operating frequencies rise, the impedance caused by parasitic inductance increases, exacerbating the impact of differential-mode noise converted from common-mode noise on normal equipment operation. Traditional common-mode inductors cannot effectively suppress differential-mode noise, and adding differential-mode inductors to the circuit inevitably increases the size and weight of the equipment.

[0004] To solve the above problems, this application proposes a common-mode inductor using leakage inductance. Utility Model Content

[0005] In response to the problems in the related art, the present invention proposes a common-mode inductor using leakage inductance to overcome the above technical problems existing in the existing related art.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A common-mode inductor utilizing leakage inductance includes a mounting plate, a fixing block fixedly connected to the top of the mounting plate, a common-mode inductor assembly fixedly connected to the top of the fixing block, the common-mode inductor assembly including a first magnetic core fixed to the top of the fixing block, a first coil and a second coil wound around the outer wall of the first magnetic core, and a differential-mode inductor assembly sheathed around the outer wall of the second coil.

[0008] Preferably, both ends of the first coil and the second coil are fixedly connected with a first pin, the outer side wall of the mounting plate is provided with a first lead-out hole, and the outer side wall of the first pin is adapted to the inner side wall of the first lead-out hole.

[0009] By providing the first pin and the first lead-out hole, the first pin installed at both ends of the first coil and the second coil is connected to the mounting plate, thereby facilitating the first pin to be inserted into the first lead-out hole for installation and fixation.

[0010] Preferably, the differential mode inductor assembly includes a second magnetic core, a third coil is wound around the outer wall of the second magnetic core, and two ends of the third coil are fixedly connected to second pins.

[0011] By providing the second magnetic core, the third coil and the second pin, the third coil is wound in parallel and the second pin is connected to the joints of the two third coils.

[0012] Preferably, a second lead-out hole is formed on the outer side wall of the mounting plate, and the inner side wall of the second lead-out hole is adapted to the outer side wall of the second pin.

[0013] By providing the second lead-out hole, the second pin can be installed and fixed through the second lead-out hole opened on the outer side wall of the mounting plate, thereby facilitating the installation of the differential mode inductor component.

[0014] Preferably, a partition is fixedly connected to the inner side wall of the first magnetic core, and the first coil and the second coil are respectively located on both sides of the partition.

[0015] By providing the partition, the partition is used to isolate the first coil and the second coil, thereby preventing the first coil and the second coil wound around the outer wall of the first magnetic core from contacting each other.

[0016] To sum up, the technical effects and advantages of the utility model are as follows: the common-mode inductor utilizing leakage inductance is a dual-mode inductor composed of a common-mode inductor component, a first magnetic core, a first coil, a first coil and a differential-mode inductor component, and the differential-mode inductor component is wound by the second coil, so that when the second coil is wound around the outer wall of the first magnetic core, the differential-mode inductor component is sleeved on the outer wall of the second coil, thereby realizing the integration of common-mode inductance and differential-mode inductance in the same inductor, so that it can suppress common-mode and differential-mode noise at the same time, and utilize leakage inductance to enhance the suppression effect of differential-mode interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the first lead-out hole and its related structures of the utility model;

[0019] Figure 3 This is a schematic diagram of the first coil and its related structures of the utility model;

[0020] Figure 4 This is a schematic diagram of the second magnetic core and its related structures of the present utility model.

[0021] In the figure: 1. Mounting plate; 2. Fixing block; 3. Common-mode inductor assembly; 301. First magnetic core; 302. First coil; 303. Second coil; 304. First pin; 4. Differential-mode inductor assembly; 401. Second magnetic core; 402. Third coil; 403. Second pin; 5. Partition; 6. First lead-out hole; 7. Second lead-out hole. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Reference Figure 1-3 A common-mode inductor using leakage inductance includes a mounting plate 1, a fixing block 2 is fixedly connected to the top of the mounting plate 1, a common-mode inductor component 3 is fixedly connected to the top of the fixing block 2, and the common-mode inductor component 3 includes a first magnetic core 301 fixed to the top of the fixing block 2, a first coil 302 and a second coil 303 are wound around the outer wall of the first magnetic core 301, and a differential-mode inductor component 4 is sleeved on the outer wall of the second coil 303. The first magnetic core 301 is supported and fixed by the fixing block 2, so that the common-mode inductor component 3 is connected to the mounting plate 1. By winding a first coil 302 and a second coil 303 around the outer wall of the first magnetic core 301, the first coil 302 and the second coil 303 are wound around the outer wall of the first magnetic core 301 in a separate winding manner, and the first magnetic core 301 is an amorphous magnetic core, so that the common-mode inductor component 3 maintains a good effective magnetic permeability value, and by sleeved with a differential-mode inductor component 4 on the outer wall of the second coil 303, a dual-mode inductor is formed by the common-mode inductor component 3 and the differential-mode inductor component 4, which can effectively filter both common-mode and differential-mode interference.

[0024] Reference Figure 1-2 Both ends of the first coil 302 and the second coil 303 are fixedly connected with a first pin 304, and the outer wall of the mounting plate 1 is provided with a first lead-out hole 6. The outer wall of the first pin 304 is adapted to the inner wall of the first lead-out hole 6. The first coil 302 and the second coil 303 are connected to the first pin 304 at both ends, and the first pin 304 is inserted into the inside of the first lead-out hole 6 for connection and fixation, thereby facilitating the installation and use of the common-mode inductor component 3.

[0025] Reference Figure 4 The differential mode inductor component 4 includes a second magnetic core 401, and a third coil 402 is wound around the outer wall of the second magnetic core 401. The two ends of the third coil 402 are fixedly connected to the second pins 403. By adopting a parallel winding method, the two third coils 402 are wound in parallel on the outer wall of the second magnetic core 401, and the two ends of the two third coils 402 are connected at the same time through the second pins 403, thereby facilitating the installation and connection of the differential mode inductor component 4 through the second pins 403, and the material of the differential mode inductor component 4 is manganese zinc.

[0026] Reference Figure 2A second lead-out hole 7 is provided on the outer wall of the mounting plate 1, and the inner wall of the second lead-out hole 7 is adapted to the outer wall of the second pin 403. The second lead-out hole 7 is provided on the outer wall of the mounting plate 1 to connect with the second pin 403, so that the differential mode inductor component 4 is connected to the mounting plate 1 through the second pin 403, and the second pin 403 is installed and fixed through the second lead-out hole 7, so that when the mounting plate 1 is installed, the differential mode inductor component 4 can be quickly installed and connected to avoid installation misalignment.

[0027] Reference Figure 1 The inner wall of the first magnetic core 301 is fixedly connected with a partition 5, and the first coil 302 and the second coil 303 are respectively located on both sides of the partition 5, and are installed in the middle part of the first magnetic core 301 through the partition 5. The first coil 302 and the second coil 303 wound on the outer wall of the first magnetic core 301 are separated by the partition 5 to avoid contact between the first coil 302 and the second coil 303, so that the first coil 302 and the second coil 303 wound on the outer wall of the first magnetic core 301 can operate normally.

[0028] Working principle: By adopting a split-line winding method, the first coil 302 and the second coil 303 are wound on the outer wall of the first magnetic core 301, and are installed at the center of the first magnetic core 301 through a partition 5. The first coil 302 and the second coil 303 are separated by the partition 5, and when the second coil 303 is wound, the differential-mode inductor component 4 is placed on the outer wall of the second coil 303, and the two ends of the first coil 302 and the second coil 303 are connected through the first pin 304, so that the first pin 304 is connected to the mounting plate 1. By adopting a parallel-line winding method, the two third coils 402 are wound on the outer wall of the second magnetic core 401, and the two third coils 402 are connected through the second pin 403, so that the second pin 403 is connected to the mounting plate 1, thereby forming a dual-mode inductor through the common-mode inductor component 3 and the differential-mode inductor component 4.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A common mode inductor using leakage inductance, comprising a mounting plate (1), characterized in that: The top of the mounting plate (1) is fixedly connected to a fixing block (2), the top of the fixing block (2) is fixedly connected to a common-mode inductor assembly (3), the common-mode inductor assembly (3) comprising a first magnetic core (301) fixed to the top of the fixing block (2), a first coil (302) and a second coil (303) wound around the outer wall of the first magnetic core (301), and a differential-mode inductor assembly (4) sheathed around the outer wall of the second coil (303).

2. The common-mode inductor using leakage inductance according to claim 1, characterized in that: Both ends of the first coil (302) and the second coil (303) are fixedly connected to a first pin (304); the outer side wall of the mounting plate (1) is provided with a first lead-out hole (6); the outer side wall of the first pin (304) is adapted to the inner side wall of the first lead-out hole (6).

3. The common-mode inductor using leakage inductance according to claim 1, wherein: The differential mode inductor component (4) comprises a second magnetic core (401), a third coil (402) is wound around the outer wall of the second magnetic core (401), and two ends of the third coil (402) are fixedly connected to second pins (403).

4. The common-mode inductor using leakage inductance according to claim 3, wherein: A second lead-out hole (7) is provided on the outer side wall of the mounting plate (1), and the inner side wall of the second lead-out hole (7) is adapted to the outer side wall of the second pin (403).

5. The common mode inductor using leakage inductance according to claim 1, characterized in that: A partition (5) is fixedly connected to the inner side wall of the first magnetic core (301), and the first coil (302) and the second coil (303) are respectively located on both sides of the partition (5).

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