TWM573885U - Transformer for pulse filter - Google Patents

Abstract

The present invention relates to a transformer for a pulse filter, comprising a base, a core, a primary side coil, a secondary side coil, two primary side terminals, and at least a secondary side terminal, wherein the iron core is a concave fixed to the base On the groove, the iron core has two hollow pipes, and is wound by the primary side coil and the secondary side coil. Each of the primary side terminal and the secondary side terminal includes a top section, a middle section, and a bottom end, and the intermediate section having the turning section is located in the base, and the top section and the bottom end are exposed outside the base. The primary side coil and the secondary side coil are top sections electrically connected to the primary side terminal and the secondary side terminal, respectively, and the bottom side sections of the primary side terminal and the secondary side terminal are used to electrically connect to the electrical circuit of the printed circuit board. Due to the turning section, this creation is easy to solder and greatly reduces the high frequency impedance.

Description

Transformer for pulse filter

The present invention relates to a transformer for a pulse filter, in particular, a primary side terminal and a secondary side terminal including a top section, an intermediate section and a bottom end are arranged on the base, and the turning section is located in the middle section of the base. The top section is prevented from being placed too close to the core to maintain an optimum spacing to facilitate the electrical connection of the primary side coil and the secondary side coil to the corresponding top section, improving soldering and substantially reducing high frequency impedance.

In the network pulse transformer, the power inductor is generally required to be used as the main coil, and the ideal characteristic of the power inductor is that the greater the current withstand capability, the better, especially in the miniaturized size, the leakage resistance can be improved by increasing the current withstand capability. Magnetic to improve overall electrical operation efficiency.

Taking a chip transformer with miniaturization characteristics as an example, the terminal for connection is extended outward from the outside of the body, so the terminal is on the outer side of the body, so that the overall volume includes the body and the terminal, which will occupy the printed circuit board. (PCB) space. For example, when the body is 10 mm and the terminal is 3 mm, the entire transformer is 13 mm, and the leading end of the coil needs to extend outward and downward toward the terminal, resulting in a long lead-out portion, and the welding is time consuming and laborious.

Therefore, there is a great need for an innovative transformer for a pulse filter that is configured on the base by a primary side terminal and a secondary side terminal including a top section, a middle section, and a bottom end, and is borrowed from a turning section of the intermediate section in the base. Preventing the top section from being too close to the core to maintain an optimal spacing, which facilitates the electrical connection of the primary side coil and the secondary side coil to the corresponding top section, thereby improving the soldering process and greatly reducing the high frequency impedance, thereby solving the above All the problems of the conventional technology.

The main purpose of the present invention is to provide a transformer for a pulse filter, comprising a base, a core, a primary side coil, a secondary side coil, two primary side terminals, and at least a secondary side terminal, wherein the base is electrically insulated Sex, and contains grooves, and the core is adhered to the groove of the base. The iron core has two hollow pipes, and each hollow pipe has an outlet hole at two end faces of the iron core, and the hollow pipes are wound by the primary side coil and the secondary side coil.

Further, each of the primary side terminal and the secondary side terminal are L-shaped, and both include a top section, a middle section and a bottom end which are sequentially connected, the middle section is located in the base, and the top section and the bottom end are bare Outside the base, the top section is an exit aperture adjacent the hollow duct, and in particular, the intermediate section in the base has a turning section and the bottom end is located on the bottom surface of the base by the turning section towards the core. In general, all of the primary side terminals and all of the secondary side terminals are arranged so as not to extend beyond the edge of the base, that is, the primary side terminal and the secondary side terminal do not increase the size of the base, and can be reduced. Taking up space is beneficial to applications that require light, thin, short, and small features.

Further, the primary side coil and the secondary side coil are respectively electrically connected to the top side of the primary side terminal and the secondary side terminal, and the bottom side sections of the primary side terminal and the secondary side terminal are electrically connected to the printed circuit board (PCB) Electrical wiring, such as by way of surface adhesion.

Due to the turning section, the top section is not too close to the core, and the optimum spacing can be maintained, so that the bottom end is aligned with the joint of the PCB, which is easy to solder and does not fall off easily. In addition, the turning section also reduces high frequency impedance and improves electrical quality. Furthermore, most of the primary side coil and the secondary side coil are wound inside the hollow duct, so that the magnetic flux leakage can be greatly reduced and the electric signal strength can be improved.

The present invention is characterized in that the terminal has a top section and a bottom end which are exposed, the middle section is in the base and has a turning section, and the whole terminal does not exceed the edge of the base, thereby reducing the occupied space. In addition, the horizontal hollow pipe just makes the lead end of the coil correspond to and close to the terminal, and the connection is easy to be welded, and it is not easy to fall off. Furthermore, the terminal has a turning section so that the top of the terminal does not come too close to the core, so that the bottom of the terminal can still correspond exactly to the contact of the PCB.

In particular, the turning section of the terminal can effectively reduce the high frequency impedance, because any discontinuity of the high frequency line layout seriously affects the electrical transmission characteristics, while the acute angle turning increases the capacitance per unit length and the inductance per unit length is reduced. . Therefore, this creation specifically designed a turning section to solve the above problems.

The implementation of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present specification after studying the present specification.

Please refer to the first figure, which is a schematic diagram and a circuit diagram of a transformer for a pulse filter according to a first embodiment of the present invention. As shown in the first figure, the transformer for a pulse filter of the first embodiment of the present invention includes a susceptor 10, a core 20, a primary side coil 30, a secondary side coil 40, two primary side terminals 50, and at least two times. Stage side terminal 60. It is to be noted that, in order to facilitate the description of the features of the present invention, only a single primary side terminal 50 and a single secondary side terminal 60 are shown in the figure, which are disposed on the base 10.

Specifically, the base 10 is electrically insulating and includes a recess 11 and the core 20 is a recess 11 that is engaged with the base. In addition, the iron core 20 has two hollow pipes 21 separated from each other, and each hollow pipe 21 has an outlet hole 22 at each end surface of the iron core 20, and the hollow is wound by the primary side coil 50 and the secondary side coil 60. The pipes 21 are not electrically connected to each other.

Each of the primary side terminal 50 and the secondary side terminal 60 has an L-like appearance and includes a top section, a middle section, and a bottom end which are sequentially connected or integrally formed, and the primary side coil 50 and the secondary side coil 60 are They are electrically connected to the top sections of the primary side terminal 50 and the secondary side terminal, respectively. Taking the secondary side terminal 60 as an example, the secondary side terminal 60 includes a top section 61, a middle section 62, and a bottom end 63, and the intermediate section 62 is located in the base 10, while the top section 61 and the bottom end 63 are bare. Outside the base 10, the top section 61 is an exit aperture 22 adjacent the hollow conduit 21. Further, the bottom end 63 is joined to the intermediate section 62 at a 90 degree angle of a positive L-shape and is located on the bottom surface of the base 10 toward the core 20.

Further, the bottom end 63 is an electrical line 71 that can be electrically connected to a printed circuit board (PCB) 70 by soldering, such as surface mount technology (SMT).

In general, all of the primary side terminals 50 and all of the secondary side terminals 60 are configured not to extend beyond the edge of the base 10, and the portion of the top section 61 does not exceed the top surface of the core 20, wherein the core 20 The top surface of the core 20 is bonded to the substrate with respect to the core 20, that is, the primary side terminal 50 and the secondary side terminal 60 do not increase the overall size of the base 11, thereby reducing the space occupied and facilitating the need. Light, thin, short, and small features.

With further reference to the second figure, a second embodiment of the present invention is a schematic diagram of a transformer for a pulse filter. As shown in the second figure, the second embodiment of the present invention is similar to the first embodiment, and also includes a susceptor 10, a core 20, a primary side coil 30, a secondary side coil 40, two primary side terminals 50, and At least the secondary side terminal 60, and the main difference therebetween is that the transformer of the second embodiment is disposed in the intermediate section 62 in the base 11 to have a turning section 62A, and the bottom end 63 is oriented toward the core by the turning section 62A. 20 is located on the bottom surface of the base 10.

In particular, the turning section 62A of the second embodiment substantially includes at least two bending angles, and only an exemplary example of two bending angles is shown, and the range of each bending angle is preferably between 30 and 60 degrees. The function of reducing the high frequency impedance, especially the optimum 45 degrees, thus achieving the intermediate turn 62 and the overall turn of the bottom end 63 is a 90 degree angle, which is different from the middle section 62 of the first embodiment. A single 90 degree angle bends to the direction of the bottom end 63. Further, the specific effect of the second embodiment is to slow down the discontinuity of the electrical circuit layout, reduce the capacitance per unit length, and increase the inductance per unit length, thereby effectively reducing the high frequency impedance and improving the transmission quality of the electrical signal. .

In summary, the present invention is characterized in that the primary side terminal and the secondary side terminal including the top section, the middle section and the bottom end are arranged on the base, and the turning section of the middle section in the base is prevented, so that the top section is not prevented. Too close to the core to maintain the optimal spacing to facilitate the bottom end to align the PCB contacts, and to improve the soldering to electrically connect the primary side coil and the secondary side coil to the corresponding top section, while the horizontal hollow duct just allows The leading end of the coil corresponds to and is close to the terminal, so it is easy to solder without falling off easily. Moreover, the terminal as a whole does not exceed the edge of the pedestal, thereby reducing the space occupied and improving the efficiency of use of the PCB.

In addition, the turning section of the middle section of the creation can also reduce the high-frequency impedance and improve the electrical quality. In particular, most of the primary side coil and the secondary side coil are wound inside the hollow duct, so that the magnetic flux leakage can be greatly reduced. Improve the electrical signal strength.

The above description is only for the purpose of explaining the preferred embodiment of the present invention, and is not intended to impose any form of limitation on the creation, so that any modification or alteration of the creation made in the same creative spirit is provided. , should still be included in the scope of protection of this creative intent.

10‧‧‧ Pedestal

11‧‧‧ Groove

20‧‧‧ iron core

21‧‧‧ hollow pipe

22‧‧‧Exit hole

30‧‧‧Primary side coil

40‧‧‧Secondary side coil

50‧‧‧primary terminal

60‧‧‧Secondary terminal

61‧‧‧Top section

62‧‧‧ Middle section

62A‧‧‧ turning section

63‧‧‧ bottom end

70‧‧‧Printed circuit board (PCB)

71‧‧‧Electrical lines

The first figure shows a schematic diagram of a transformer for a pulse filter in accordance with a first embodiment of the present invention. The second figure shows a schematic diagram of a transformer for a pulse filter in accordance with a second embodiment of the present invention.

Claims (7)

A transformer for a pulse filter for providing a power filtering function, comprising: a pedestal electrically insulating and including a recess; an iron core adhered to the recess of the base, and Having two hollow pipes separated from each other, the hollow pipe has an outlet hole at each end surface of the iron core; a primary side coil provided with the hollow pipes; a secondary side coil provided with the hollow pipes, and not electrically Connecting the primary side coil; at least two primary side terminals are disposed on the base; and at least secondary side terminals are disposed on the base, wherein the primary side terminal and the secondary side terminal have an L-shape An outer portion, an intermediate portion, and a bottom end, the intermediate portion being located in the base, wherein the top portion and the bottom end are exposed outside the base, the top portion being adjacent to the An outlet hole of the hollow pipe, the primary side coil and the secondary side coil are respectively electrically connected to the top side of the primary side terminal and the secondary side terminal, and the bottom end is electrically connected to a printed circuit by a soldering method An electrical circuit board. A transformer for a pulse filter according to claim 1, wherein the welding method is a surface mount technique (SMT). A transformer for a pulse filter according to claim 1, wherein the primary side terminal and the secondary side terminal are configured not to extend beyond an edge of the base without increasing one of the bases Overall size and size. A transformer for a pulse filter according to claim 1, wherein the core is engaged with the groove. A transformer for a pulse filter according to claim 1, wherein the primary side terminal and the top side of the secondary side terminal do not exceed a top surface of the core. A transformer for a pulse filter according to claim 1, wherein the intermediate section has a turning section, and the bottom end is located on a bottom surface of the base by the turning section toward the core. A transformer for a pulse filter according to claim 6, wherein the inflection section comprises at least two bending angles, and each of the bending angles is between 30 and 60 degrees.