EMI filter
An electromagnetic interference and filter technology, applied in the field of filters, can solve the problems of large DC resistance, difficulty in suppressing different frequency bands, large power consumption of electromagnetic interference filters, etc., to achieve the effect of reducing DC resistance and reducing power consumption
Active Publication Date: 2018-08-28
SHENZHEN ZHENHUA FU ELECTRONICS
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the defects of the prior art, and the electromagnetic interference filter provided can solve the problem that the structure of the electromagnetic interference filter of the prior art is easy to generate a large DC resistance when the current flows through the internal parts of the cover, so that It causes the electromagnetic interference filter to generate large power consumption, and the problem that the cover is easy to heat up and heat up, and solves the problem that the electromagnetic interference filter in the prior art is difficult to suppress different frequency bands
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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0028] see Figure 1 to Figure 4 , the following describes the best embodiment of the electromagnetic interference filter of the present invention.
[0029] The electromagnetic interference filter 100 of the present embodiment includes a cover body 10, at least two inductors 20 of different frequencies connected to each other, a first capacitor 30, a second capacitor 40, an input terminal 50 and an output terminal 60, facing the electromagnetic Each part of interference filter 100 is described further:
[0030] The cover body 10 has a first outer side and a second outer side arranged relative to ...
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The invention provides an electromagnetic interference filter comprising a cover body, at least two inductors mutually connected and different in frequency, a first capacitor, a second capacitor, input terminals and output terminals. The cover body is internally provided with a current increase structure capable of increasing the current of the electromagnetic interference filter. The at least two inductors and the second capacitor are arranged at the two ends inside the cover body respectively. The input terminals and the output terminals are arranged at two outer sides of the cover body respectively in a penetrating mode. According to the invention, the cover body is internally provided with the current increase structure, and current flowing through internal components of the cover body is enabled to be higher than current of a cover body structure in the prior art by the aid of the current increase structure, so that the direct-current resistance of the electromagnetic interference filter is reduced, and the power consumption of the electromagnetic interference filter is reduced. Meanwhile, the electromagnetic interference filter is provided with the at least two inductors which are mutually connected and different in frequency, so that different frequency bands are suppressed, and the bandwidth can reach 100KHz-2GHz from 100KHz-1GHz effectively compared with the arrangement structure comprising a single inductor in the prior art.
Description
technical field [0001] The invention relates to the technical field of filters, in particular to an electromagnetic interference filter. Background technique [0002] Electromagnetic interference (EMI) filter is a low-pass filter composed of inductors and capacitors, which allows low-frequency useful signals to pass smoothly, while suppressing high-frequency interference. [0003] The electromagnetic interference filter is mainly composed of a cover body, and inductors and capacitors installed inside the cover body. Among them, the current cover body structure is mostly injection-molded, and then no further processing is performed. This type of cover body structure is used in When the current flows through the internal parts of the cover, a large DC resistance will be generated, which will not only cause a large power consumption of the EMI filter, but also easily cause the cover to heat up and reduce the reliability of the EMI filter; , since most current EMI filters are o...
Claims
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IPC IPC(8): H05K9/00
Inventor 陈益芳张育龙方祥武高永毅廖荣华
Owner SHENZHEN ZHENHUA FU ELECTRONICS