CN212392127U

CN212392127U - Transformer device

Info

Publication number: CN212392127U
Application number: CN202021294680.XU
Authority: CN
Inventors: 林枝有; 刘文喜; 王�琦; 陈敏; 颜文浩
Original assignee: Guangdong Bozhilin Robot Co Ltd
Current assignee: Guangdong Bozhilin Robot Co Ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-01-22
Anticipated expiration: 2030-07-03

Abstract

The utility model provides a transformer, include: a magnetic core; a primary winding, at least part of the primary winding being mounted on the magnetic core, the primary winding comprising at least two primary winding parts; a secondary winding, at least part of the secondary winding being mounted on the magnetic core, the secondary winding comprising at least two secondary winding parts; and the isolation parts are arranged between the primary winding parts and the secondary winding parts adjacently, so that the problem of large leakage inductance of the transformer in the prior art is solved.

Description

Transformer device

Technical Field

The utility model relates to a transformer field particularly, relates to a transformer.

Background

LLC (logical link control) is a resonant circuit that controls switching frequency to achieve constant output voltage, wherein LLC transformers are mainly designed in two ways, external leakage inductance and internal leakage inductance.

The existing transformer generally adopts two pairs of magnetic cores, the winding space of the two pairs of magnetic cores is large, the volume of a general magnetic element accounts for about 30% of the volume of a power converter, the existing transformer is basically carried out by using a winding mode, the transformer is required to be provided with a separation groove for isolation in the aspect of insulation, the space is limited, the requirements of high power density, high efficiency and high reliability of a building robot cannot be met, meanwhile, the cost is increased, and the installation difficulty is increased.

In addition, the existing mode of winding two pairs of magnetic cores is adopted, a certain air gap is generated at the joint of the two magnetic cores, and the leakage inductance of the transformer is increased.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a transformer to solve the problem of leakage inductance of transformers in the prior art.

In order to achieve the above object, the present invention provides a transformer, including: a magnetic core; a primary winding, at least part of the primary winding being mounted on the magnetic core, the primary winding comprising at least two primary winding parts; a secondary winding, at least part of the secondary winding being mounted on the magnetic core, the secondary winding comprising at least two secondary winding parts; and an isolation member, wherein the primary winding member and the secondary winding member are alternately arranged with each other in a predetermined direction, and the isolation member is arranged between the primary winding member and the secondary winding member adjacent to each other.

Furthermore, the at least two primary winding parts are respectively provided with a first connecting part, and the first connecting part enables the at least two primary winding parts to be electrically connected through the first connecting part; wherein at least two primary winding parts are arranged in parallel.

Further, the first connecting parts are multiple, and the multiple first connecting parts are arranged at intervals along the circumferential direction of the primary winding part; or, the first connecting part is one or a plurality of first connecting through holes arranged at intervals.

Furthermore, the at least two secondary winding parts are respectively provided with a second connecting part, and the second connecting parts enable the at least two secondary winding parts to be electrically connected through the second connecting parts; wherein at least two secondary winding parts are arranged in parallel.

Further, the second connecting parts are multiple and are arranged at intervals along the circumferential direction of the secondary winding part; or the second connecting part is one or a plurality of second connecting through holes arranged at intervals.

Further, the magnetic core includes: a magnetic core body; at least two wire winding spaces, the setting all is equipped with primary and secondary in every wire winding space on the magnetic core body, and at least two wire winding spaces set up along the extending direction interval of magnetic core body.

Further, the magnetic core further includes: the winding posts are arranged on the magnetic core body and located in the winding spaces, the at least two primary winding parts and the at least two secondary winding parts are arranged around the winding posts, and the at least two primary winding parts and the plurality of secondary winding parts are sequentially and alternately arranged in each winding space along the extending direction of the winding posts.

Furthermore, the primary winding part and the secondary winding part are respectively provided with a first avoidance part for avoiding the winding post.

Furthermore, the isolation component is provided with a second avoidance part for avoiding the winding post.

Further, the isolation component is a printed wiring board.

Use the technical scheme of the utility model, the transformer, including magnetic core, primary winding, secondary winding and isolation parts, primary winding's at least part is installed on the magnetic core, and primary winding includes two at least primary winding parts, and secondary winding's at least part is installed on the magnetic core, and secondary winding includes two at least secondary winding parts; the primary winding parts and the secondary winding parts are alternately arranged along a preset direction, and an isolation part is arranged between the adjacent primary winding parts and the adjacent secondary winding parts. The arrangement can adjust the input current and the output current of the transformer through the number of the superposed primary winding parts and secondary winding parts, increase the insulativity, increase the balance between the transformers and the reliability of the product, increase the output power and reduce the leakage inductance of the transformer.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of a transformer according to the present invention;

fig. 2 shows a schematic structural view of a magnetic core of a transformer according to the present invention;

fig. 3 shows a schematic structural view of a primary winding part according to the invention;

fig. 4 shows a schematic structural view of a secondary winding part according to the invention;

fig. 5 shows a schematic structural view of an isolation component of a transformer according to the present invention;

fig. 6 shows a schematic diagram of the positional relationship of the primary winding and the secondary winding according to the present invention;

fig. 7 shows a schematic diagram of primary and secondary winding connections according to the present invention; and

fig. 8 shows a circuit diagram of a resonant circuit of a transformer according to the invention.

Wherein the figures include the following reference numerals:

1. a magnetic core; 2. a primary winding; 20. a primary winding part; 3. a secondary winding; 30. a secondary winding part; 4. an isolation member; 201. a first connection portion; 301. a second connecting portion; 10. a magnetic core body; 11. a winding space; 12. a winding post; 5. a first avoidance portion; 40. a second avoidance portion.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The utility model provides a transformer please refer to fig. 1 to fig. 8, include: a magnetic core 1; a primary winding 2, at least part of the primary winding 2 being mounted on the magnetic core 1, the primary winding 2 comprising at least two primary winding parts 20; a secondary winding 3, at least part of the secondary winding 3 being mounted on the magnetic core 1, the secondary winding 3 comprising at least two secondary winding parts 30; and isolation members 4, wherein the primary winding members 20 and the secondary winding members 30 are alternately arranged with each other in a predetermined direction, and the isolation members 4 are arranged between the primary winding members 20 and the secondary winding members 30 which are adjacently arranged.

According to the utility model provides a transformer, including magnetic core 1, primary winding 2, secondary winding 3 and isolation parts 4, primary winding 2 installs on magnetic core 1 at least partly, and primary winding 2 includes two at least primary winding parts 20, and secondary winding 3 installs on magnetic core 1 at least partly, and secondary winding 3 includes two at least secondary winding parts 30; the primary winding parts 20 and the secondary winding parts 30 are alternately arranged with each other in a predetermined direction, and the isolation parts 4 are provided between the primary winding parts 20 and the secondary winding parts 30 which are adjacently arranged. The arrangement enables the magnitude of the input current and the output current of the transformer to be adjusted by the number of the primary winding parts 20 and the secondary winding parts 30 which are superposed, thereby reducing the leakage inductance of the transformer.

In the above arrangement, the primary winding parts 20 and the secondary winding parts 30 are alternately arranged along a predetermined direction, and the isolation parts 4 are arranged between the adjacent primary winding parts 20 and the adjacent secondary winding parts 30, so that the primary winding parts 20, the isolation parts 4 and the secondary winding parts 30 form a sandwich-like stacked arrangement, and the input and output currents of the transformer can be adjusted by the number of the stacked primary winding parts and secondary winding parts; the sandwich-like laminated structure can reduce the leakage inductance of the transformer, has better insulating property, reduces the number of magnetic components, reduces the height of the magnetic components, increases the output power, enhances the heat dissipation of the magnetic components and improves the efficiency of a power supply system. Preferably, similar sandwich stromatolite setting combines two at least primary winding parts 20 to connect in parallel and two at least secondary winding parts 30 are parallelly connected simultaneously, can make the utility model discloses an effect of transformer reaches the optimum, will the utility model discloses an application of transformer has reduced the vibrations risk in the construction robot working process, has improved construction robot adaptability and reliability under complicated operating condition greatly.

Specifically, as shown in fig. 3, a first connection portion 201 is provided on each of the at least two primary winding parts 20, so that the first connection portion electrically connects the at least two primary winding parts 20 through the first connection portion 201. Preferably, at least two primary winding parts 20 are arranged in parallel. The first connection portion 201 comprises a plurality of first connection holes, and at least two primary winding parts 20 of the transformer can be connected in series or in parallel through the first connection portion 201 by using metal connectors, so that different output voltages are adjusted, and the occupied space area of the primary winding is effectively reduced.

When a plurality of primary winding parts 20 are arranged in parallel, the primary winding parts 20, the isolation part 4 and the secondary winding part 30 form a sandwich-like stacked parallel arrangement mode, so that the input and output currents of the transformer can be adjusted through the number of the stacked primary winding parts and secondary winding parts; the sandwich-like laminated structure can reduce the leakage inductance of the transformer, has better insulating property, reduces the number of magnetic components, reduces the height of the magnetic components, increases the output power, enhances the heat dissipation of the magnetic components and improves the efficiency of a power supply system.

In the embodiment provided by the present invention, the first connection portion 201 is plural, and the plural first connection portions 201 are arranged at intervals along the circumferential direction of the primary winding part 20; alternatively, the first connection portion 201 is one or a plurality of first connection through holes arranged at intervals, and the connection between the at least two primary winding parts 20 can be simpler by arranging the first connection through holes, wherein the first connection portion may be a metal part capable of conducting electricity.

In the implementation process, as shown in fig. 4, a second connection portion 301 is disposed on each of the at least two secondary winding parts 30, and the second connection portion 301 electrically connects the at least two secondary winding parts 30. Preferably, at least two secondary winding parts 30 are arranged in parallel. The second connection portion 301 includes a plurality of second connection holes, and at least two secondary winding parts 30 of the transformer can be connected in series or in parallel through the second connection portion 301 by using a metal connector, so that different output voltages can be adjusted, and the occupied space area of the secondary winding can be effectively reduced.

When the plurality of secondary winding parts 30 are arranged in parallel and the plurality of primary winding parts 20 are arranged in parallel, the primary winding parts 20, the isolation part 4 and the secondary winding parts 30 form a sandwich-like laminated parallel arrangement mode, so that the primary winding parts 20 and the secondary winding parts 30 are well coupled, and the leakage inductance is further reduced.

Preferably, the second connection portion 301 is plural, and the plural second connection portions 301 are arranged at intervals in the circumferential direction of the secondary winding part 30; alternatively, the second connection portion 301 is one or a plurality of second connection through holes arranged at intervals. Wherein the second connector may be a metal member capable of conducting electricity.

As shown in fig. 1 and 2, in the embodiment provided by the present invention, the magnetic core 1 includes: a magnetic core body 10; at least two winding spaces 11 are arranged on the magnetic core body 10, a primary winding 2 and a secondary winding 3 are arranged in each winding space 11, and the at least two winding spaces 11 are arranged at intervals along the extending direction of the magnetic core body 10. It should be noted that, as shown in fig. 2, the extending direction of the magnetic core body 10 is the length direction of the magnetic core body 10, and thus the plurality of winding spaces 11 are arranged on one magnetic core body 10, so that the windings can be directly wound in the plurality of winding spaces 11 on the magnetic core body 10, the occupied space area of the magnetic core is reduced, and the air gap between the magnetic cores is reduced.

In order to facilitate guiding and limiting of the at least two primary winding parts 20 and the at least two secondary winding parts 30, the magnetic core 1 further comprises: at least two winding posts 12 are arranged in one-to-one correspondence with the at least two winding spaces 11, the winding posts 12 are arranged on the magnetic core body 10 and are positioned in the winding spaces 11, in each winding space 11, at least two primary winding parts 20 and at least two secondary winding parts 30 are arranged around the winding posts 12, and the at least two primary winding parts 20 and the at least two secondary winding parts 30 are sequentially and alternately arranged along the extending direction of the winding posts 12. Preferably, the winding leg 12 is integrally formed with the magnetic core body 10.

In the implementation process, in order to facilitate the installation of the primary winding part 20 and the secondary winding part 30, the primary winding part 20 and the secondary winding part 30 are both provided with a first avoiding portion 5 for avoiding the winding post 12, so that when the primary winding part 20 and the secondary winding part 30 are installed, the first avoiding portion 5 avoids the body of the winding post 12.

Preferably, the isolation member 4 is provided with a second escape portion 40 for escaping from the winding post 12, so that the isolation member 4 escapes from the winding post 12 through the second escape portion 40. The isolation member 4 is a printed wiring board.

When the primary winding part 20 and the secondary winding part 30 are arranged specifically, the opening of the avoiding portion of the primary winding part 20 faces the inner side of the winding space, and the opening of the avoiding portion of the secondary winding part 30 adjacent thereto faces the outer side of the winding space, and the primary winding part 20 and the secondary winding part 30 are alternately arranged in sequence, so that the arrangement between at least two primary winding parts 20 and at least two secondary winding parts 30 is more compact.

As shown in fig. 6 and 7, the transformer of the present invention uses two winding spaces 11 as an example, and the two winding spaces 11 are a winding space a and a winding space B. The number of the primary winding part 20 and the secondary winding part 30 is 3 each. The winding sequence of the primary winding in the winding space A is A1-A5-A9, and the winding sequence of the primary winding in the winding space B is B1-B5-B9; the winding sequence of the secondary winding of the winding space A is A3-A7-A11, and the winding sequence of the secondary winding of the winding space B is B3-B7-B11, A2, A4, A6, A8 and A10, B2, B4, B6, B8 and B10 are all isolation parts, and the isolation parts are preferably planar PCBs (printed circuit boards). The primary winding and the secondary winding are arranged in a laminated mode, so that the primary winding and the secondary winding can be well coupled, and the generated leakage inductance is reduced. It should be noted that the winding electrical isolation layer in fig. 7 is the above-mentioned isolation component 4, and the primary connection a is the connection relationship between multiple primary winding components in the primary winding of the winding space a; the A secondary connection is the connection relation among a plurality of secondary winding parts in the secondary winding of the winding space A; the B primary is connected with the connection relationship among a plurality of primary winding parts in the primary winding of the winding space B; the secondary winding of the winding space B is connected with a plurality of secondary winding parts, the primary winding parts may be connected in parallel or in series, and the secondary winding parts may be connected in parallel or in series.

Fig. 8 shows a circuit diagram of a resonant circuit of a transformer, wherein L1 is a resonant inductor, T1A is a transformer, C2 is a resonant capacitor, and the resonant inductor, the transformer and the resonant capacitor form a resonant circuit network; d1, D2, D3, D4, CE1 and CE2 form a secondary rectifying and filtering network. Therefore, it can be directly seen that, because a plurality of winding spaces are arranged on the magnetic core, the air gap between two adjacent winding spaces is reduced, and a primary winding part 20, an isolation part 14 and a secondary winding part 30 which are similar to a sandwich lamination are arranged in each winding space, the leakage inductance of the transformer is greatly reduced, and the installation space of the transformer is reduced.

The utility model provides a transformer is planar transformer, mainly is applied to industrial robot power module, because industrial robot's installation space is limited, utilizes the utility model provides a planar transformer can save installation space, improves the working effect of transformer.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

according to the utility model provides a transformer, including magnetic core 1, primary winding 2, secondary winding 3 and isolation parts 4, primary winding 2 installs on magnetic core 1 at least partly, and primary winding 2 includes two at least primary winding parts 20, and secondary winding 3 installs on magnetic core 1 at least partly, and secondary winding 3 includes two at least secondary winding parts 30; the primary winding parts 20 and the secondary winding parts 30 are alternately arranged with each other in a predetermined direction, and the isolation parts 4 are provided between the primary winding parts 20 and the secondary winding parts 30 which are adjacently arranged. The arrangement can adjust the input current and the output current of the transformer through the number of the superposed primary winding parts 20 and secondary winding parts 30, increase the insulativity, increase the balance between the transformers and the reliability of the product, increase the output power and reduce the leakage inductance of the transformer.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A transformer, comprising:

a magnetic core (1);

a primary winding (2), at least part of said primary winding (2) being mounted on said magnetic core (1), said primary winding (2) comprising at least two primary winding parts (20);

a secondary winding (3), at least part of said secondary winding (3) being mounted on said magnetic core (1), said secondary winding (3) comprising at least two secondary winding parts (30); and

and isolation parts (4), wherein the primary winding parts (20) and the secondary winding parts (30) are arranged alternately with each other along a predetermined direction, and the isolation parts (4) are arranged between the primary winding parts (20) and the secondary winding parts (30) which are adjacently arranged.

2. The transformer according to claim 1, characterized in that at least two of the primary winding parts (20) are each provided with a first connection (201) which electrically connects at least two of the primary winding parts (20) via the first connection (201);

wherein at least two of the primary winding parts (20) are arranged in parallel.

3. The transformer according to claim 2, wherein the first connection portion (201) is plural, and the plural first connection portions (201) are provided at intervals in a circumferential direction of the primary winding part (20); alternatively, the first and second electrodes may be,

the first connecting part (201) is one or a plurality of first connecting through holes arranged at intervals.

4. A transformer according to claim 1, characterized in that at least two of said secondary winding parts (30) are each provided with a second connection portion (301), a second connection member electrically connecting at least two of said secondary winding parts (30) through said second connection portions (301); wherein at least two of said secondary winding parts (30) are arranged in parallel.

5. The transformer of claim 4,

the number of the second connecting parts (301) is multiple, and the second connecting parts (301) are arranged at intervals along the circumferential direction of the secondary winding part (30); alternatively, the first and second electrodes may be,

the second connecting portion (301) is one or a plurality of second connecting through holes arranged at intervals.

6. The transformer according to claim 1, characterized in that the magnetic core (1) comprises:

a magnetic core body (10);

at least two wire winding spaces (11) are arranged on the magnetic core body (10), each wire winding space (11) is internally provided with the primary winding (2) and the secondary winding (3), and the at least two wire winding spaces (11) are arranged at intervals along the extension direction of the magnetic core body (10).

7. The transformer according to claim 6, characterized in that the magnetic core (1) further comprises:

at least two wrapping posts (12), with at least two winding space (11) one-to-one ground sets up, wrapping post (12) set up on magnetic core body (10) and lie in winding space (11), in every winding space (11), at least two primary winding part (20) and at least two secondary winding part (30) all surround winding post (12) set up, in every winding space, at least two primary winding part (20) and at least two secondary winding part (30) are followed winding post (12) extending direction sets up in proper order in turn.

8. The transformer according to claim 7, characterized in that a first avoidance portion (5) for avoiding the winding leg (12) is provided on each of the primary winding part (20) and the secondary winding part (30).

9. The transformer according to claim 7, characterized in that the isolation member (4) is provided with a second escape portion (40) for escaping the winding leg (12).

10. The transformer according to any of claims 1 to 9, characterized in that the isolation component (4) is a printed wiring board.