TWI543212B - novel transformer structure - Google Patents

Description

Novel transformer structure

The invention relates to the related technical field of power electronic technology, in particular to a novel transformer structure.

With the evolution and development of electronic products, different electronic products need to be driven by different voltages; therefore, manufacturers of power supply devices actively try to develop various transformer structures to be correspondingly applied to various power supply devices.

In view of the wide application of transformers, engineers are actively trying to adjust the leakage inductance generated by the transformer. More commonly, the engineer adjusts the separation distance between the primary coil winding and the secondary winding winding to increase or decrease the leakage inductance.

1 and 2 are respectively a perspective view and a side cross-sectional view of a conventional transformer structure. As shown, the conventional transformer structure 1' includes: a first core 11', a second core 12', a primary coil bobbin 13', and a primary coil winding 14'; The first core 11' and the second core 12' are respectively disposed in the through hole (131', 141') of the primary coil bobbin 13' and the secondary coil bobbin 14'. The primary coil bobbin 13' has a primary coil pin 132', a primary coil winding portion 133', and a combined socket 134'; meanwhile, the secondary coil bobbin 14' also has a primary The stage coil pin 142' and the primary coil winding portion 143'.

In the above description, the joint sleeve 134' provided by the primary coil bobbin 13' is for accommodating one side of the secondary coil winding portion 143'. In addition, as shown in the figure, at least one spacer (136', 145') is respectively disposed on the primary coil winding portion 133' and the secondary coil winding portion 143' for winding the primary coil. The frame 13' and the secondary coil winding frame 14' are separated by at least two winding regions, so that the primary coil 135' and the secondary coil 144' of the coil group can be wound around the primary coil bobbin 13, respectively. 'Two winding areas above the secondary coil winding frame 14'. Then, the primary coil 135' and the secondary coil 144' wound on the primary coil winding portion 133' and the secondary coil winding portion 143' are electrically connected to the primary coil pin 132' and the secondary, respectively. Coil pin 142'. Thus, the primary coil bobbin 13' and the secondary coil bobbin 14' form a sliding expansion joint by the joint sleeve 134', and are displaced on the two cores (11', 12'). motion.

The conventional transformer structure 1' shown in Figures 1 and 2 is widely used as a novel transformer and can be conveniently soldered to a power supply or a main circuit board of a power converter. However, the conventional transformer structure 1' still has the following major drawbacks:

(1) In the conventional transformer structure 1', generally, the primary side core (i.e., the first core 11') and the primary coil 135' are high voltage terminals, and therefore, as shown in Fig. 2, for mounting In the case of the circuit board 2' of the conventional transformer structure 1', the space requirement between the first core 11' and its adjacent electronic component 21' must comply with the safety requirements; assuming a conventional transformer structure 1' The first core 11' and its adjacent electronic component 21' cannot meet the specified spacing requirements, and the first core 11' must be insulated. At the same time, when high voltage is input, high voltage power may directly cross the primary coil 135' to the secondary coil 144' via the adjacent iron core, causing leakage or even damaging other electronic components on the circuit board 2'. Therefore, in the case of the conventional transformer structure 1', it is necessary to additionally wrap an insulating material, such as an insulating tape, over the first core 11'; thus, it is possible to ensure that the conventional transformer structure 1' can Meet relevant safety regulations.

(2) In addition, in the design of the conventional transformer structure 1', the portion of the secondary coil 144' that is drawn to the secondary coil pin 142' is significantly too close to the second core 12', resulting in a conventional The creepage distances of the transformer structure 1' are not in compliance with the relevant safety regulations. Here, the term "surface distance" means the distance from the winding trailing edge surface of the secondary coil 144' to the second core 12'. Therefore, in the case of the conventional transformer structure 1', it is necessary to additionally wrap an insulating tape on the second core 12'; thus, it can ensure that the conventional transformer structure 1' can meet the space requirement. Related safety regulations. It is conceivable that the procedure of wrapping the first iron core 11' and the second iron core 12' around the insulating tape cannot be completed by an automatic device, so the procedure of wrapping the insulating tape must be performed by hand. This is accomplished by the rise in manufacturing costs of the transformer structure 1' that led to the prior art.

Therefore, in view of the fact that the conventional transformer structure 1' shows many defects in practical applications, the inventors of the present invention have tried to study the invention and finally developed a novel transformer structure of the present invention.

The main object of the present invention is to provide a novel transformer structure. Different from the conventional transformer structure, the novel transformer structure of the present invention has an integrally formed receiving body and a first bobbin, and the receiving body accommodates and covers the second bobbin. So designed, after the primary side core is combined to the second bobbin in the receiving body, the receiving body provides an effective insulation to the primary side core, so that the primary side core of the novel transformer structure of the present invention Adjacent electronic components can meet the space requirements required by safety regulations. At the same time, since the bobbin of the primary coil is covered by the central accommodating portion of the accommodating body, when the high voltage is input to the primary coil, the accommodating body provides an effective insulation of the primary coil to prevent high voltage. The electricity directly crosses the secondary coil via the adjacent secondary side core.

Therefore, in order to achieve the above object of the present invention, the inventors of the present invention have proposed a novel transformer structure, which includes:

a receiving body having a first opening, a second opening, and a third opening; and the receiving system further includes: a first arch type bonding plate disposed at the first opening; a second arched binding plate is disposed at the second opening; two partitioning plates are disposed in the receiving body, and the two dividing plates are connected to the first arched bonding plate and the second arch a type of bonding plate, and further separating a central receiving portion, a first side receiving portion and a second side receiving portion in the receiving body;

a first bobbin, a nozzle is connected to the first arch-type bonding plate, and extends from the first arch-type bonding plate for winding the first winding coil thereon;

a first connection terminal group is disposed at a lip of the other nozzle of the first bobbin, and at least one outlet end of the first winding coil is connected to the first connection terminal group;

a second bobbin is inserted into the central receiving portion via the third opening, and has a second winding coil, a first nozzle and a second nozzle; wherein the second winding a coil is wound on the second bobbin;

a second connection terminal set is disposed at a lip of the first nozzle of the second bobbin; and, when the second bobbin is received in the central receiving portion, the second The connection terminal group and the first connection terminal group are parallel to each other;

a first E-shaped iron core is composed of a first base block, a first central block, a first side block, and a second side block; wherein, when the first E-shaped core is When assembled to the accommodating body, the first central block is received in the first bobbin, and one of the first side blocks is partially disposed in the first side accommodating portion, and One portion of the second side block is configured to be placed in the second side receiving portion;

a second E-shaped iron core is composed of a second base block, a second central block, a third side block, and a fourth side block; wherein, when the second E-shaped core is When the body is assembled to the receiving body, the second central block is received in the second bobbin through the first nozzle, and the third side block is received on the first side. And the fourth side block is received in the second side receiving portion.

In order to more clearly describe a novel transformer structure proposed by the present invention, a preferred embodiment of the present invention will be described in detail below with reference to the drawings.

Please refer to FIG. 3A and FIG. 3B simultaneously, which are perspective views of a novel transformer structure of the present invention; and, please refer to FIGS. 4A and 4B simultaneously, which are exploded views of the novel transformer structure of the present invention. As shown, a novel transformer structure 1 of the present invention includes: a receiving body 11, a first bobbin 15, a first connecting terminal set 16, a second bobbin 17, and a second connection. The terminal group 18, a first E-shaped iron core 19, and a second E-shaped iron core 19a.

Continuing to refer to FIGS. 3A and 3B and FIGS. 4A and 4B, and referring to FIGS. 5A and 5B at the same time, a cross-sectional view of the housing 11 is shown. As shown in the figure, the receiving body 11 has a first opening 111, a second opening 112, and a third opening 113. The first opening 111 and the second opening 112 are the receiving body 11. The two ends are open, and the third opening 113 is the bottom opening of the receiving body 11. In particular, the present invention is further provided inside the receiving body 11 : a first arched bonding plate 12 formed at the first opening 111 and a second arched bonding plate 13 formed at the second opening 112 . And two partition plates 14. The two partitioning plates 14 are disposed in the receiving body 11 , and the two partitioning plates 14 are connected to the first arched bonding plate 12 and the second arched bonding plate 13 . A central receiving portion 114 , a first side receiving portion 115 and a second side receiving portion 116 are separated from the receiving body 11 .

In the above, the first bobbin 15 has two end nozzles, and is connected to the first arched coupling plate 12 by a nozzle thereof, and extends from the first arched coupling plate 12 for A first winding coil (not shown) is wound thereon. Moreover, a baffle 151 is formed on the edge of the other nozzle of the first bobbin 15 with respect to the nozzle connected to the first arched coupling plate 12, and the first connecting terminal group 16 is permeable. The baffle 151 is disposed at the edge of the other nozzle such that at least one of the outlet ends of the first winding coil is connected to the first connection terminal group 16. As shown in the figure, the first connection terminal group 16 includes: a first terminal block 160, a plurality of first bumps 161 formed on the first terminal block 160, and formed on the plurality of first bumps A plurality of first grooves 162 between 161 and a plurality of first terminals 163 respectively passing through the plurality of first grooves 162. Here, it should be particularly noted that the housing 11 and the first bobbin 15 are integrally formed with the baffle 151 and the first connection terminal group 16 .

In the present invention, the second bobbin 17 and the second connection terminal group 18 are integrally formed. as the picture shows. The second bobbin 17 is inserted into the central accommodating portion 114 via the third opening 113 (ie, the bottom opening) of the accommodating body 11, and a second coil (not shown) is wound around the second opening 113 Above the second bobbin 17. Furthermore, the second connection terminal group 18 is disposed at the edge of the first nozzle 17a of one of the second bobbins 17. In this case, it should be additionally noted that, as shown in the figure, when the second bobbin 17 is received in the central receiving portion 114, the second connecting terminal group 18 is coupled to the first connecting terminal group. 16 The two are parallel to each other. And a shielding plate 117 extending from the third opening 113 and the edge of the second opening 112; wherein the two sides of the shielding plate 117 are provided with two recesses 1171, thereby designing The shielding plate 117 can cover and closely receive the second connection terminal group 18.

Please refer to FIG. 6 at the same time, which is a perspective view of the housing 11, the first bobbin 15, the first connection terminal group 16, the second bobbin 17, and the second connection terminal group 18. As shown in the figure, a first fitting portion 121 is formed on the edge of the first arched coupling plate 12, and a second fitting portion 131 is formed on the edge of the second arched coupling plate 13. In particular, when the second bobbin 17 is received in the central receiving portion 114, a first nozzle 17a and a second nozzle 17b of the second bobbin 17 are respectively facing each other. The second arched bonding plate 13 and the first arched bonding plate 12 are attached.

In particular, the present invention is further designed on the second bobbin 17 with a first connecting plate 171, a second connecting plate 172, a third connecting plate 174, and a fourth connecting plate 175. As shown, the first connecting plate 171 is formed at the edge of the second nozzle 17b. Moreover, the second connecting plate 172 is formed on the second bobbin 17 and parallel to the first connecting plate 171, thereby designing a first engaging portion 173 to be formed on the first connecting plate. 171 is between the second connecting plate 172.

According to the above description, the third connecting plate 174 extends from the edge of the first nozzle 17a. Moreover, the fourth connecting plate 175 is formed on the second bobbin 17 and parallel to the third connecting plate 174, thereby designing a second engaging portion 176 to be formed on the third connecting plate. 174 is between the fourth connecting plate 175. By adding the first connecting plate 171, the second connecting plate 172, the third connecting plate 174, and the fourth connecting plate 175 to the second bobbin 17, when the second bobbin 17 is placed When the central receiving portion 114 is inside, the first connecting plate 171, the second connecting plate 172 and the first engaging portion 173 may be in the first engaging portion 121 of the first arched coupling plate 12. The third connecting plate 174, the fourth connecting plate 175 and the second engaging portion 176 are fitted to the second arched connecting plate 13 and the second engaging portion 131.

Similar to the first connection terminal group 16, as shown, the second connection terminal group 18 includes a second terminal block 180 and a plurality of second portions formed on the second terminal block 180. a bump 181, a plurality of second recesses 182 formed between the plurality of second bumps 181, and a plurality of second terminals 183 respectively penetrating into the plurality of second recesses 182. In addition, at least one first partition 177 is formed on the second bobbin 17 for separating at least two winding regions on the second bobbin 17. Therefore, it should be particularly noted that although FIGS. 4A and 4B disclose that the first spacer 177 is formed on the second bobbin 17, the novel transformer of the present invention should not be limited thereby. Embodiment of Structure 1. In the actual fabrication or application of the novel transformer structure 1, at least one second spacer (not shown) may be formed on the first bobbin 15, thereby being above the first bobbin 15 Separate at least two winding areas.

Please refer to Figures 3A and 3B and Figures 4A and 4B at the same time. As shown, the first E-shaped core 19 is composed of a first base block 190, a first central block 191, a first side block 192, and a second side block 193. In the present invention, the thickness of the first side block 192 and the second side block 193 is equal to the width of the first base block 190, and the thickness of the first central block 191 is smaller than the first The thickness of the side block 192 and the second side block 193. So that when the first E-shaped iron core 19 is combined to the receiving body 11 via the first opening 111, the first central block 191 is accommodated in the first bobbin 15; A portion of the first side block 192 is received in the first side receiving portion 115, and a portion of the second side block 193 is received on the second side. The accommodating portion 116 is included. It must be additionally noted that, as shown, when the first E-shaped iron core 19 is combined to the accommodating body 11 via the first opening 111, the baffle 151 is pressed against the second base block 19a0.

Similarly, the second E-shaped core 19a is composed of a second base block 19a0, a second central block 19a1, a third side block 19a2, and a fourth side block 19a3. Specifically, in the structure of the second E-shaped core 19a, the thickness of the third side block 19a2 and the fourth side block 19a3 is equal to the width of the second base block 19a0, and the second center The thickness of the block 19a1 is smaller than the thickness of the third side block 19a2 and the fourth side block 19a3. So designed, when the second E-shaped iron core 19a is combined to the receiving body 11 via the second opening 112, the second arched bonding plate 13 will abut against the second base block 19a0; The second central block 19a1 is accommodated in the second bobbin 17; at the same time, the third side block 19a2 is accommodated in the first side receiving portion 115, and the fourth side The side block 19a3 is accommodated in the second side receiving portion 116.

Thus, the above description has completely and clearly revealed the novel transformer structure 1 of the present invention, and, through the above, we can know that the present invention has the following advantages:

(1) Unlike the conventional transformer structure 1' (as shown in FIGS. 1 and 2), as shown in FIG. 3A, the novel transformer structure 1 of the present invention is mounted on a circuit board 2 And having the integrally formed receiving body 11 and the first bobbin 15 , the second bobbin 17 is received and covered by the receiving body 11 . So designed, after the primary side core (the second E-shaped core 19a) is combined to the second bobbin 17 in the housing 11, the receiving body 11 provides an effective insulation to the primary side core, so that The primary side core of the novel transformer structure 1 of the present invention and its adjacent electronic component 21 can meet the space requirements required by safety regulations. At the same time, since the second bobbin 17 is covered by the central accommodating portion 114, when the high voltage is input to the primary coil 31 above the second bobbin 17, the accommodating body 11 provides the primary coil 31. An effective insulation prevents high voltage electricity from directly crossing to the secondary coil 32 via the adjacent secondary side core (first E-shaped core 19).

(2) According to the first point described above, since the present invention utilizes the housing 11 to accommodate the protective bobbin and the two E-shaped cores (19, 19a), the manufacture of the novel transformer structure 1 of the present invention is During the process, it is not necessary to additionally wrap an insulating material (such as an insulating tape) over the two E-shaped cores (19, 19a).

(3) Further, in the design of the novel transformer structure 1 of the present invention, the primary coil 31 and the secondary coil 32 are wound on two different wire frames (i.e., the second bobbin 17 and the first winding) The tube 15); therefore, compared to the conventional transformer structure 1', the difficulty of the coil winding procedure of the novel transformer structure 1 of the present invention is relatively simple and uncomplicated, so that the overall structure of the novel transformer structure 1 can be effectively shortened. Process time.

It is to be understood that the foregoing detailed description of the embodiments of the present invention is not intended to Both should be included in the scope of the patent in this case.

<present invention>
1‧‧‧New transformer structure
2‧‧‧ boards
11‧‧‧容容
12‧‧‧First arch type binding plate
13‧‧‧Second arch type binding plate
14‧‧‧ partition board
15‧‧‧First bobbin
16‧‧‧First connection terminal set
17‧‧‧Second bobbin
18‧‧‧Second connection terminal set
19‧‧‧First E-shaped core
19a‧‧‧Second E-shaped core
21‧‧‧Electronic components
31‧‧‧ primary coil
32‧‧‧secondary coil
111‧‧‧ first opening
112‧‧‧ second opening
113‧‧‧ third opening
114‧‧‧Central Housing Department
115‧‧‧First Side Access
116‧‧‧Second side containment
117‧‧‧shading board
121‧‧‧First mating department
131‧‧‧Second fitting
151‧‧‧ baffle
160‧‧‧First terminal block
161‧‧‧First bump
162‧‧‧first groove
163‧‧‧First terminal
17a‧‧‧first nozzle
17b‧‧‧second nozzle
171‧‧‧First connecting plate
172‧‧‧Second connection plate
173‧‧‧First Embedding
174‧‧‧ third connecting plate
175‧‧‧fourth connection plate
176‧‧‧Second inlay
177‧‧‧ first partition
180‧‧‧Second terminal block
181‧‧‧second bump
182‧‧‧second groove
183‧‧‧second terminal
190‧‧‧ first block
191‧‧‧First Central Block
192‧‧‧ first side block
193‧‧‧Second side block
1171‧‧‧ recess
19a0‧‧‧second base block
19a1‧‧‧second central block
19a2‧‧‧ third side block
19a3‧‧‧4th side block

<知知>
1'‧‧‧General transformer structure
2'‧‧‧ boards
11'‧‧‧First core
12'‧‧‧second core
13'‧‧‧Primary coil bobbin
14'‧‧‧Secondary coil winding frame
21'‧‧‧Electronic components
131'‧‧‧through hole
132'‧‧‧ primary coil pin
133'‧‧‧Primary coil winding
134'‧‧‧ combined with the mouth
135'‧‧‧ primary coil
136'‧‧‧Baffle
141'‧‧‧through hole
142'‧‧‧Secondary coil pins
143'‧‧‧Secondary coil winding
144'‧‧‧secondary coil
145'‧‧‧Baffle

Figure 1 is a perspective view of a conventional transformer structure;

Figure 2 is a side cross-sectional view of a conventional transformer structure;

3A and 3B are perspective views of a novel transformer structure of the present invention;

4A and 4B are exploded views of the novel transformer structure of the present invention;

5A and 5B are cross-sectional views of the housing.

Figure 6 is a perspective view of the housing, the first bobbin, the first connection terminal group, the second bobbin, and the second connection terminal group.

1‧‧‧New transformer structure

11‧‧‧容容

12‧‧‧First arch type binding plate

13‧‧‧Second arch type binding plate

15‧‧‧First bobbin

16‧‧‧First connection terminal set

17‧‧‧Second bobbin

18‧‧‧Second connection terminal set

19‧‧‧First E-shaped core

19a‧‧‧Second E-shaped core

112‧‧‧ second opening

114‧‧‧Central Housing Department

117‧‧‧shading board

121‧‧‧First mating department

131‧‧‧Second fitting

151‧‧‧ baffle

160‧‧‧First terminal block

161‧‧‧First bump

162‧‧‧first groove

163‧‧‧First terminal

171‧‧‧First connecting plate

172‧‧‧Second connection plate

173‧‧‧First Embedding

177‧‧‧ first partition

180‧‧‧Second terminal block

181‧‧‧second bump

182‧‧‧second groove

183‧‧‧second terminal

190‧‧‧ first block

191‧‧‧First Central Block

192‧‧‧ first side block

193‧‧‧Second side block

1171‧‧‧ recess

19a0‧‧‧second base block

19a1‧‧‧second central block

19a2‧‧‧ third side block

19a3‧‧‧4th side block

Claims (11)

A novel transformer structure includes: a receiving body having a first opening, a second opening, and a third opening; and the receiving system further comprises: a first arch type bonding plate Provided at the first opening; a second arched bonding plate is disposed at the second opening; two partitioning plates are disposed in the receiving body, and the two dividing plates are connected to the first arch The combination plate and the second arch-type bonding plate further partition a central receiving portion, a first side receiving portion and a second side receiving portion in the receiving body; and a shielding plate Extending from the third opening of the receiving body and the edge of the second opening; a first bobbin having a nozzle connected to the first arched bonding plate and The first arch type bonding plate is extended for the first winding coil to be wound thereon; a first connecting terminal group is disposed at a lip of the other nozzle of the first bobbin, and At least one outgoing end of the first winding coil is connected to the first connecting terminal group; a second bobbin is connected to the first winding terminal Inserting into the central receiving portion, and having a second winding coil, a first nozzle and a second nozzle; wherein the second winding coil is wound on the second bobbin a second connection terminal set is disposed at a lip of the first nozzle of the second bobbin; and, when the second bobbin is received in the central receiving portion, the The two connection terminal groups and the first connection terminal group are parallel to each other; a first E-shaped iron core is composed of a first base block, a first central block, a first side block, And a second side block; wherein, when the first E-shaped iron core is combined to the receiving body, the first The central block is received in the first bobbin, and one of the first side blocks is partially disposed in the first side receiving portion, and one of the second side blocks is received And the second E-shaped core is formed by a second base block, a second central block, a third side block, and a fourth side block. Constructing; wherein, when the second E-shaped iron core is combined to the receiving body, the second central block is received in the second bobbin through the first nozzle, the third side The side block is received in the first side receiving portion, and the fourth side block is received in the second side receiving portion. The novel transformer structure of claim 1, wherein two sides of the shielding plate are further formed with two recesses for receiving the second connection terminal group. The novel transformer structure of claim 1, wherein the thickness of the first side block and the second side block are equal to the width of the first base block, and the thickness of the first central block It is smaller than the thickness of the first side block and the second side block. The novel transformer structure of claim 1, wherein the thickness of the third side block and the fourth side block are equal to the width of the second base block, and the thickness of the second central block It is smaller than the thickness of the third side block and the fourth side block. The novel transformer structure of claim 1, wherein the first connection terminal group comprises: a first terminal block; a plurality of first bumps formed on the first terminal block; a plurality of first grooves formed between the plurality of first bumps; and a plurality of first The terminals are respectively passed through the plurality of first grooves. The novel transformer structure of claim 1, wherein the first arched bonding plate and the second arched bonding plate form a first fitting portion and a second fitting portion, respectively. The novel transformer structure of claim 2, wherein the second connection terminal group comprises: a second terminal block; a plurality of second bumps formed on the second terminal block; a second groove formed between the plurality of second bumps; and a plurality of second terminals respectively penetrating into the plurality of second grooves; wherein, when the second bobbin When being placed in the central receiving portion, the second terminal holder is received in the shielding plate and fitted into the two recesses. The novel transformer structure of claim 6, wherein a baffle is formed on the edge of the other nozzle of the first bobbin; and, when the first E-shaped iron core is assembled to When the body is received, the baffle is against the first base block. The novel transformer structure of claim 8, wherein the receiving body, the first bobbin, the baffle and the first connecting terminal group are integrally formed, and the second bobbin and the The second connection terminal group is integrally formed. The novel transformer structure of claim 9, wherein the first nozzle and the second tube of the second bobbin are received when the second bobbin is received in the central receiving portion The mouthpiece is respectively facing the second arch type bonding plate and the first arch type bonding plate; and the second bobbin pipe further comprises: a first connecting plate from the mouth of the second pipe mouth a second connecting plate is formed on the second bobbin and parallel to the first connecting plate for forming a gap between the first connecting plate and the second connecting plate a first engaging portion; a third connecting plate extending from the edge of the first nozzle; a fourth connecting plate formed on the second bobbin and parallel to the first a third connecting plate for forming a second engaging portion between the third connecting plate and the fourth connecting plate; and at least one first partition formed on the second bobbin and interposed Between the second connecting plate and the third connecting plate, at least two winding regions are separated from the second bobbin; wherein when the second bobbin is placed When the central receiving portion is inside, the first connecting plate, the second connecting plate and the first engaging portion are engaged with the first engaging portion; and the third connecting plate and the fourth connecting portion are The plate and the second engaging portion and the second fitting portion are fitted to each other. The novel transformer structure of claim 9, wherein the first bobbin is formed with at least one second baffle for separating at least two winding regions above the first bobbin .