TWM511113U - Common mode filter - Google Patents

Description

Common mode filter

The present invention relates to a core structure of a common mode filter.

Chinese Patent Publication No. CN1252747, published on April 19, 2006, discloses a common mode filter comprising a I-shaped nickel-zinc magnetic core and a plurality of enameled wires wound around the magnetic core, one end of which is provided with a magnetic core A flange portion and the opposite end are provided with a second flange portion, and each of the flange portions is provided with an electrode terminal, and the enamel wires are respectively soldered to the corresponding conductive terminals. The magnetic core is made of nickel-zinc and has a low magnetic permeability, which makes it difficult to greatly increase the inductance of the product.

Chinese Patent Publication No. CN2651911, published on October 27, 2004, which discloses a common mode filter comprising a set of manganese-zinc magnetic cores, a bobbin mounted on the magnetic core, an enameled wire wound around the bobbin and An electrode terminal disposed on the bobbin, the enameled wire being electrically connected to the corresponding electrode terminal. Since the manganese-zinc material is a conductive material, the conductive terminal cannot be directly disposed on the magnetic core, and an additional frame is required, which is complicated in structure and large in volume.

As mentioned above, the common mode common mode filter of the prior art has a magnetic core with low magnetic permeability, a complicated structure and a large volume.

The technical problem to be solved by this creation is to provide a common mode filter whose magnetic core permeability is high and the inductance value of the product is simplified, and the structure is small, and the volume is small.

In order to solve the above technical problem, a technical solution provided by the present invention is: a common mode filter comprising a magnetic core and an enameled wire wound on the magnetic core, the magnetic core comprising a central body and a first method at one end of the central body a blue portion and a second flange portion opposite to the other end, the magnetic core further comprising an insulating layer disposed on a lower surface of the first and second flange portions and an electrode terminal disposed on a lower surface of the insulating layer, wherein the enamel wires are respectively soldered Corresponding electrode terminals.

Compared with the prior art, the present invention forms an insulating layer on the Mn-Zn magnetic core with higher magnetic permeability, and directly electroplating the electrode terminal on the insulating layer to electrically connect with the enamel wire wound on the magnetic core, thereby increasing the The inductance value of the product also simplifies the product structure.

100‧‧‧Common mode filter

10‧‧‧ magnetic core

11‧‧‧Center body

12‧‧‧First flange

13‧‧‧Second flange

14‧‧‧Insulation

140‧‧‧protrusion

15‧‧‧electrode terminal

150‧‧‧ Groove

16‧‧‧ gap

20‧‧‧ Cover

30‧‧‧Enameled wire

31‧‧‧ primary coil

311a‧‧‧First Welding Department

312a‧‧‧ Third Welding Department

311b‧‧‧Second Welding Department

312b‧‧‧fourth welding department

32‧‧‧secondary coil

321a‧‧‧ fifth welding department

322a‧‧‧ seventh welding department

321b‧‧‧ sixth welding department

322b‧‧‧8th Welding Department

171‧‧‧First slotting

172‧‧‧Second slotting

173‧‧‧ third slot

174‧‧‧fourth slot

175‧‧‧5th slot

176‧‧‧ sixth slot

151‧‧‧First electrode terminal

152‧‧‧Second electrode terminal

153‧‧‧third electrode terminal

154‧‧‧fourth electrode terminal

155‧‧‧ fifth electrode terminal

156‧‧‧ sixth electrode terminal

157‧‧‧ seventh electrode terminal

158‧‧‧8th electrode terminal

The first picture is a perspective view of the proposed common mode filter.

The second figure is an exploded view of the common mode filter shown in the first figure.

Referring to the first and second figures, the present common mode filter 100 includes an I-shaped magnetic core 10, a cover plate 20 adhered to the upper surface of the magnetic core 10, and a plurality of enameled wires wound around the magnetic core 10. 30. The cover 20 and the magnetic core 10 are adhered together by epoxy resin. The magnetic core 10 includes a center body 11, a first flange portion 12 at one end of the center body 11, and a second flange portion 13 at the other end of the center body 11. The upper and lower surfaces of the first flange portion 12 and the second flange portion 13 protrude from the center body 11, and the enamel wire 30 is wound around the center body 11. The central body 11 and the first and second flange portions 12 and 13 of the magnetic core 10 are made of manganese-zinc material. Since the magnetic permeability of the manganese-zinc material is high, the inductance value of the product can be greatly improved. The magnetic core 11 further includes an insulating layer 14 formed on the lower surface of the first and second flange portions 12, 13 and an electrode terminal 15 electroplated on the lower surface of the insulating layer 14, the surface of the electrode terminal 15 being provided The groove 150 (the groove 150 may not be provided), and the end welded portion of the enamel wire 30 is received in the groove 150 and is spot-welded to the electrode terminal 15. Since the manganese-zinc material is a conductive material, the electrode terminal 15 cannot be directly disposed on the first and second flange portions 12 and 13 made of a manganese-zinc material, and thus the first and second flange portions 12 and 13 are formed. The insulating layer 14 and the inhomogeneity of the insulating layer 14 are higher than the first and second flange portions 12 and 13 of the manganese-zinc material. A notch 16 is defined on each of the two sides of the first and second flange portions 12 and 13 . The protruding portion 140 extends upwardly from the two sides of the insulating layer 14 , and the protruding portion 140 is received in the notch 16 . Therefore, the insulating layer 14 is less likely to fall off from the first and second flange portions 12, 13.

The first electrode terminal 151, the second electrode terminal 152, the third electrode terminal 153, and the fourth electrode terminal 154 are disposed on the insulating layer 14 of the first flange portion 12. A first slot 171 is disposed between the first electrode terminal 151 and the second electrode terminal 152, and a second slot 172, a third electrode terminal 153 and a fourth electrode are disposed between the second electrode terminal 152 and the third electrode terminal 153. A third slot 173 is defined between the electrode terminals 154. The third slot 173 is smaller than the first slot 171, and the first slot 171 is smaller than the second slot 172. The fifth electrode terminal 155, the sixth electrode terminal 156, the seventh electrode terminal 157, and the eighth electrode terminal 158 are provided on the insulating layer 14 of the second flange portion 13. A fourth slot 174 is disposed between the fifth electrode terminal 155 and the sixth electrode terminal 156, and a fifth slot 175 is disposed between the sixth electrode terminal 156 and the seventh electrode terminal 157, and the seventh electrode terminal 157 and the eighth electrode A sixth slot 176 is provided between the electrode terminals 158. The sixth slot 176 is smaller than the fourth slot 174, and the fourth slot 174 is smaller than the fifth slot 175. The first slot 171 is the same as the fourth slot 174, the second slot 172 is the same as the fifth slot 175, and the third slot 173 is the same as the sixth slot 176. The first, second, third, fourth, fifth, sixth, seventh, and eighth electrode terminals 151, 152, 153, 154, 155, 156, 157, 158 are arranged in a counterclockwise direction.

The enamel wire 30 includes a primary coil 31 and a secondary coil 32. The primary coils 31 are respectively soldered to the electrode terminals 15 on the same side of the first and second flange portions 12, 13, and the secondary coils 32 are respectively soldered to the other side electrode terminals 15 opposed to the primary coils. The detailed description is as follows: The primary coil 31 includes a first enamel wire 311 and a second enamel wire 312. A first welded portion 311a and a second welded portion 311b are provided at both ends of the first enamel wire 311. The first welded portion 311a is welded to the first electrode terminal 151, and the second welded portion 311b is welded to the seventh electrode terminal 157. A third welded portion 312a and a fourth welded portion 312b are provided at both ends of the second enamel wire 312. The third welded portion 312a is welded to the second electrode terminal 152, and the fourth welded portion 312b is welded to the eighth electrode terminal 158. The secondary coil 32 includes a third enamel wire 321 and a fourth enamel wire 322. The fifth soldering portion 321 is provided with a fifth soldering portion 321a and a sixth soldering portion 321b at both ends, the fifth soldering portion 321a is soldered to the third electrode terminal 153, and the sixth soldering portion 321b is soldered to the fifth electrode terminal 155. The seventh soldering portion 322 has a seventh soldering portion 322a and an eighth soldering portion 322b at both ends, the seventh soldering portion 322a is soldered to the fourth electrode terminal 154, and the eighth soldering portion 322b is soldered to the sixth electrode terminal 156.

The original common mode filter 100 is formed by forming an insulating layer 14 on a manganese-zinc magnet and then plating the electrode terminal 15 onto the insulating layer 14. By improving the material of the magnet and the structure of the magnetic core 10, the inductance value of the product is made. The boost is greatly improved, and the structure of the common mode filter 100 is simple.

The above description is only one embodiment of the present invention, and is not all or the only embodiment. Any equivalent change taken by a person skilled in the art by reading the present specification to the technical solution of the present invention is the right of the present creation. The requirements are covered.

100‧‧‧Common mode filter

10‧‧‧ magnetic core

20‧‧‧ Cover

30‧‧‧Enameled wire

171‧‧‧First slotting

172‧‧‧Second slotting

173‧‧‧ third slot

174‧‧‧fourth slot

175‧‧‧5th slot

176‧‧‧ sixth slot

151‧‧‧First electrode terminal

152‧‧‧Second electrode terminal

153‧‧‧third electrode terminal

154‧‧‧fourth electrode terminal

155‧‧‧ fifth electrode terminal

156‧‧‧ sixth electrode terminal

157‧‧‧ seventh electrode terminal

158‧‧‧8th electrode terminal

311a‧‧‧First Welding Department

321a‧‧‧ fifth welding department

312a‧‧‧ Third Welding Department

322a‧‧‧ seventh welding department

311b‧‧‧Second Welding Department

312b‧‧‧fourth welding department

321b‧‧‧ sixth welding department

322b‧‧‧8th Welding Department

Claims (9)

A common mode filter comprising:
a magnetic core, the magnetic core comprising a central body and a first flange portion at one end of the central body and a second flange portion at the opposite end;
An enameled wire, the enameled wire is wound on the magnetic core;
The magnetic core further includes an insulating layer formed on the lower surface of the first and second flange portions and an electrode terminal disposed on the lower surface of the insulating layer, and the enamel wires are respectively soldered to the corresponding electrode terminals. The common mode filter of claim 1, wherein the magnetic core is made of a manganese-zinc material. The common mode filter according to claim 2, wherein the first and second flange portions are respectively provided with a notch, and the insulating layer is provided with a protruding portion, and the protruding portion is received in the notch. . The common mode filter according to claim 2, wherein the enamel wire comprises a primary coil and a secondary coil, the primary coil being welded to the electrode terminal on the same side of the first and second flange portions, and the secondary coil An electrode terminal welded to the other side of the first and second flange portions. The common mode filter of claim 4, wherein the primary coil comprises a first enamel wire and a second enamel wire, and the secondary coil comprises a third enamel wire and a fourth enamel wire. The common mode filter according to claim 1, wherein the electrode terminal is plated on a lower surface of the insulating layer. The common mode filter of claim 1, wherein the enameled wire and the electrode terminal are spot welded. The common mode filter according to claim 1, wherein the common mode filter further comprises a cover plate, and the cover plate is adhered to the magnetic core on the opposite side of the insulating layer. The common mode filter of claim 8, wherein the cover plate and the magnetic core are adhered with an epoxy resin.