Filter integrated with differential mode inductor and common mode inductor

By integrating differential-mode and common-mode inductors into the filter design, the problems of large space occupation and high cost in the existing technology are solved, achieving high electromagnetic compatibility and transmission efficiency, reducing energy loss, and making it suitable for the field of electronic devices.

CN224400170UActive Publication Date: 2026-06-23SHENZHEN BOULDER ELECTRONIC CO LTD
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Patent Information

Application Number
CN202521292694.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-06-20
Publication Date
2026-06-23
Estimated Expiration
2035-06-20

AI Technical Summary

Technical Problem

In existing filters, differential-mode inductors and common-mode inductors are usually set separately, which takes up a lot of space, is costly, and is difficult to manufacture.

Method used

A filter integrating differential-mode inductors and common-mode inductors is designed. The differential-mode inductors and common-mode inductors are placed in the left and right cavities respectively by setting a shielding plate in the housing and connected by taps. An aluminum plate is used to shield interference, and manganese-zinc power magnetic materials and iron-based nanocrystalline magnetic materials are used as filter elements for the differential-mode inductors and common-mode inductors respectively.

Benefits of technology

It achieves a smaller size and lower cost filter design, improves electromagnetic compatibility and transmission efficiency, reduces energy loss, and is easy to install and modularly produce.

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Abstract

The utility model discloses a filter integrating a differential mode inductor and a common mode inductor, which comprises a box body, an inductor assembly and a tap assembly, a shielding plate is arranged in the box body, the inductor assembly comprises the differential mode inductor and the common mode inductor, the differential mode inductor and the common mode inductor are respectively arranged in a left cavity and a right cavity, and the tap assembly comprises two taps. The tap comprises a main part and two branch parts, the two branch parts penetrate through the top wall of the box body and enter the left cavity and the right cavity respectively, a magnetic core of the common mode inductor is sleeved with two independent coils, a magnetic core of the differential mode inductor is provided with a double-wire parallel winding coil, one end of each independent coil is connected with one branch part of the tap, and the other end of each independent coil penetrates through the box body; the independent coils are in one-to-one correspondence with the taps; one end of each wire in the double-wire parallel winding coil is connected with the other branch part of the corresponding tap, the other end of each wire penetrates through the box body, and the two wires in the double-wire parallel winding coil correspond to the taps one to one. According to the structure, the occupied space can be reduced, the production cost is reduced, and efficient energy transmission and filtering effects are achieved.
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