CN201984923U

CN201984923U - Filter inductor

Info

Publication number: CN201984923U
Application number: CN2011200665882U
Authority: CN
Inventors: 叶婧
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-15
Filing date: 2011-03-15
Publication date: 2011-09-21
Anticipated expiration: 2021-03-15

Abstract

The utility model provides a filter inductor, which comprises an annular magnetic core and two sets of coils wound on the annular magnetic core. The magnetic core comprises a magnetic post, a winding post and a winding hole; the winding post and the winding hole that are symmetric with each other are arranged on two sides of the middle of the magnetic post respectively; and the two sets of coils are symmetrically arranged on two sides of the axial line of an annular plane and are wound on the semi-ring of the magnetic core respectively, the winding directions of the two sets of the coils are opposite, connecting terminals are arranged at two ends of each coil respectively, the connecting terminals of the coils are electrically connected with one or more magnetic beads serially connected with the coils, and the adjacent two ends of the coils are connected with two ends of the inductor. The filter inductor provided by the utility model adopts the two sets of the coils with opposite winding directions, and the two sets of the coils are symmetrically wound on the two sides of the axial line of the magnetic core respectively to enable the two ends of the inductor coils to be furthest from each other, so as to achieve the purpose of increasing withstand voltage; and magnetic beads are serially connected with the two ends of the coils of the inductor, and the high-frequency impedance characteristic of the magnetic beads is utilized in combination with the low-frequency impedance characteristic of an original inductor to increase the high-frequency impedance of the original inductor.

Description

A kind of filter inductor

Technical field

The utility model relates to a kind of inductor, relates in particular to a kind of circuit filtering that is used for, and two ends can bear high-tension inductor.

Background technology

The coil two ends distance of existing toroidal inductor equals to enclose the turn-to-turn distance substantially, and that is therefore born is withstand voltage lower, is difficult in the output filter circuit of high power amplifier.

Summary of the invention

In order to overcome above-mentioned defective, the purpose of this utility model provides a kind of circuit filtering that is used for, and high-tension inductor can be born in two ends.

For achieving the above object, the technical solution of the utility model is:

A kind of filter inductor, it comprises toroidal core and the coil that is wound on the toroidal core, described magnetic core comprises the magnetic post, wrapping post and coiling hole, the magnetic post is positioned at the center, the both sides of the middle part of magnetic bead are respectively arranged with symmetrical coiling pillar and coiling hole, described coil is two groups, axis symmetry with planar annular, divide and be around on the semi-ring of magnetic core, the hand of spiral of described two groups of coils is opposite, the two ends of coil are respectively equipped with terminals, and the terminals of coil are electrically connected with one or more magnetic beads of connecting with coil, and the coil adjacent both ends connects the two ends of inductor.

The number of turns of described two groups of coils equates.

Described toroidal core is the annulus magnetic core, and the axis of symmetry of described two groups of coils is circle diameters.

The usefulness of technique scheme is:

The utility model adopts two groups of opposite coils of the hand of spiral, symmetry is around in the center line both sides of magnetic core respectively, the adjacent both ends point of two groups of coils connects and composes the zero end of inductor coil, the two ends distance that makes inductor coil farthest, thereby reach the purpose that improves withstand voltage; By at the coil two ends of inductor series connection magnetic bead, utilize the high-frequency resistance characteristic of magnetic bead, cooperate the low-frequency impedance characteristic of former inductor, improved the high-frequency resistance size of former inductor.

Below in conjunction with the drawings and specific embodiments the utility model is further described.

Description of drawings

Fig. 1 is this novel schematic diagram;

Fig. 2 is the schematic diagram of magnetic core.

Embodiment

As Fig. 1, a kind of filter inductor shown in 2, it comprises toroidal core 1 and the coil that is wound on the toroidal core, described magnetic core 1 comprises magnetic post 4, wrapping post 5 and coiling hole 6, magnetic post 4 is positioned at the center, the both sides of the middle part of magnetic post 4 are respectively arranged with symmetrical wrapping post 5 and coiling hole 6, described coil is two groups, number in the figure is respectively 2,3, axis symmetry with planar annular, divide and be around on the semi-ring of magnetic core 1, the hand of spiral of described two groups of coils is opposite, the two ends of coil are respectively equipped with terminals, and the terminals of coil are electrically connected with one or more magnetic beads 7 of connecting with coil, and the coil adjacent both ends connects the two ends of inductor, promptly the A of coil 3 end links to each other with the C end of coil 2 among the figure, and the B end of coil 3 links to each other with the D end of coil 2.The number of turns of described two groups of coils equates.Described toroidal core is the annulus magnetic core, and the axis of symmetry of described two groups of coils is circle diameters.

Claims

1. filter inductor, it is characterized in that: it comprises toroidal core and the coil that is wound on the toroidal core, described magnetic core comprises the magnetic post, wrapping post and coiling hole, the magnetic post is positioned at the center, the both sides of the middle part of magnetic bead are respectively arranged with symmetrical coiling pillar and coiling hole, described coil is two groups, axis symmetry with planar annular, divide and be around on the semi-ring of magnetic core, the hand of spiral of described two groups of coils is opposite, the two ends of coil are respectively equipped with terminals, and the terminals of coil are electrically connected with one or more magnetic beads of connecting with coil, and the coil adjacent both ends connects the two ends of inductor.

2. a kind of filter inductor as claimed in claim 1 is characterized in that: the number of turns of described two groups of coils equates.

3. a kind of filter inductor as claimed in claim 1 is characterized in that: described toroidal core is the annulus magnetic core, and the axis of symmetry of described two groups of coils is circle diameters.