PCB common mode inductor

Abstract

A PCB common mode inductor relates to the technical field of filters and is used for solving the technical problem that an existing common mode inductor is poor in differential mode interference suppression capability. In the PCB common-mode inductor, an upper common-mode magnetic core and a lower common-mode magnetic core which are the same are integrated with a PCB winding wire in a glue fixing mode so as to form the PCB common-mode inductor. Meanwhile, a group of differential mode PCB windings are added.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and in particular to a PCB common-mode inductor. Background Art

[0002] Currently, commonly used common-mode inductors are usually fixed with a toroidal magnetic core and winding enameled copper wire, and finally the common-mode inductor is soldered to the PCB board.

[0003] The inventors of the present application have discovered that the existing common-mode inductor has a ring-shaped magnetic core, so the magnetic circuit can only realize common-mode inductance and does not have the characteristics of differential-mode inductance, which results in the commonly used common-mode inductor having a weak ability to suppress differential-mode interference. Summary of the Invention

[0004] The object of the present invention is to provide a PCB common-mode inductor for solving the technical problem that the existing common-mode inductor has poor ability to suppress differential-mode interference.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A PCB common-mode inductor is constructed by integrating two identical common-mode magnetic cores, one above the other, with PCB winding traces using glue to fix them together. A set of differential-mode PCB windings is also added.

[0006] The common-mode magnetic core is used to provide a common-mode magnetic circuit and a differential-mode magnetic circuit. The common-mode magnetic circuit can form a common-mode inductor and suppress common-mode interference, and the differential-mode magnetic circuit can form a differential-mode inductor and suppress differential-mode interference.

[0007] Specifically, the PCB winding routing is used to provide multi-turn coils on the common-mode magnetic circuit and the differential-mode magnetic circuit, and can increase the common-mode inductance and the differential-mode inductance.

[0008] Compared with the prior art, the PCB common-mode inductor of the present invention has the following advantages: In the PCB common-mode inductor provided by the present invention, two identical upper and lower common-mode magnetic cores are integrated with PCB winding traces by glue fixation to form the PCB common-mode inductor. Therefore, the PCB common-mode inductor effectively reduces the use of enameled copper wire, thereby reducing manufacturing costs. At the same time, a set of differential-mode PCB windings is added, so that the common-mode inductor has the characteristics of a differential-mode inductor. As a result, the PCB common-mode inductor can suppress not only common-mode interference but also differential-mode interference, thereby improving the filtering effect of the filter and further effectively reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram of the structure of a PCB common-mode inductor from a first perspective provided in an embodiment of the present invention; Figure 2 A second perspective structural diagram of the PCB common-mode inductor provided in an embodiment of the present invention.

[0010] Reference numerals: 1-common mode magnetic circuit; 2-differential mode magnetic circuit; 10-common mode inductor; 20-differential mode inductor. DETAILED DESCRIPTION

[0011] For ease of understanding, the PCB common-mode inductor provided by the embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0012] The embodiment of the present invention provides a PCB common mode inductor, such as Figure 1 and Figure 2 As shown in the figure, two identical common-mode cores, upper and lower, are integrated with the PCB winding traces using glue to form a PCB common-mode inductor; at the same time, a set of differential-mode PCB windings is added.

[0013] Compared with the prior art, the PCB common-mode inductor described in the embodiment of the present invention has the following advantages: In the PCB common-mode inductor provided in an embodiment of the present invention, two identical upper and lower common-mode magnetic cores are integrated with PCB winding traces by gluing to form the PCB common-mode inductor. Therefore, the PCB common-mode inductor effectively reduces the use of enameled copper wire, thereby reducing manufacturing costs. At the same time, a set of differential-mode PCB windings is added, so that the common-mode inductor has the characteristics of a differential-mode inductor. As a result, the PCB common-mode inductor can suppress not only common-mode interference but also differential-mode interference, thereby improving the filtering effect of the filter and further effectively reducing costs.

[0014] Among them, such as Figure 1 and Figure 2 As shown, the common-mode magnetic core is used to provide a common-mode magnetic circuit 1 and a differential-mode magnetic circuit 2. The common-mode magnetic circuit 1 can form a common-mode inductor 10 and suppress common-mode interference, and the differential-mode magnetic circuit 2 can form a differential-mode inductor 20 and suppress differential-mode interference.

[0015] Specifically, if Figure 1 and Figure 2 As shown, the PCB winding routing is used to provide multi-turn coils on the common-mode magnetic circuit 1 and the differential-mode magnetic circuit 2, and can increase the common-mode inductance and the differential-mode inductance.

[0016] In summary, the PCB common-mode inductor provided by the embodiment of the present invention has the following advantages: 1. PCB common-mode inductors reduce the use of enameled copper wire and have lower manufacturing costs; Second, the PCB common-mode inductor has a common-mode magnetic circuit and a differential-mode magnetic circuit, which enables it to form both common-mode inductance and differential-mode inductance. As a result, the PCB common-mode inductor can not only suppress common-mode interference, but also suppress differential-mode interference, thereby improving the filtering effect of the filter. 3. PCB common-mode inductors are easy to manufacture and do not require additional inductor manufacturers. At the same time, they effectively reduce the wave soldering process and reduce the complexity of the process.

[0017] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A PCB common mode inductor, characterized in that: Two identical upper and lower common-mode cores are integrated with the PCB winding traces using glue to form a PCB common-mode inductor; at the same time, a set of differential-mode PCB windings is added.

2. The PCB common mode inductor according to claim 1, characterized in that: The common-mode magnetic core is used to provide a common-mode magnetic circuit and a differential-mode magnetic circuit. The common-mode magnetic circuit can form a common-mode inductance and suppress common-mode interference, and the differential-mode magnetic circuit can form a differential-mode inductance and suppress differential-mode interference.

3. The PCB common mode inductor according to claim 1 or 2, characterized in that: The PCB winding routing is used to provide multi-turn coils on the common-mode magnetic circuit and the differential-mode magnetic circuit, and can increase the common-mode inductance and the differential-mode inductance.

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