Transformer framework and transformer thereof

Abstract

The utility model provides a transformer framework and a transformer thereof. The transformer framework comprises a bottom wall, a side wall and a plurality of pins. Wherein the side wall and the bottom wall define a containing space with an opening, and the containing space is used for containing a magnetic core and a coil. And the plurality of pins are fixedly connected with one side, deviating from the accommodating space, of the side wall and are arranged at intervals. The framework is not provided with a wrapping post for accommodating the magnetic core, the base is cut into the certain accommodating space for accommodating the coil, and the magnetic core can be connected with the bottom wall of the accommodating space, so that the utilization space of the base is increased, and the volume of the whole framework is reduced. More importantly, the side wall plays a part of role in preventing the coil from being contacted with the external pin, and the exposed area of the coil is greatly reduced, so that the breakdown risk is also greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the field of electrical equipment, and in particular relates to a transformer frame and a transformer thereof. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, secondary coil and magnetic core. Its main functions include voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc.

[0003] Among them, the transformer skeleton is an indispensable part of the transformer. The transformer skeleton is also a component of the main structure of the transformer, providing winding space for the coil in the transformer and fixing the magnetic core in the transformer. At present, the transformer skeleton structure tends to have a winding post with a through hole in the middle, where the through hole is used to place the magnetic core, and one end of the winding post is a base with pins, which causes the winding post of the skeleton to usually protrude from the base, resulting in the bottom surface of the base and the winding post being too high, the volume being increased, and the exposed area of ​​the coil being too large, increasing the risk of breakdown. Utility Model Content

[0004] The technical purpose of the utility model is to provide a transformer frame, aiming to reduce the overall volume of the transformer without reducing other functions and reduce the risk of coil breakdown.

[0005] In order to solve the above technical problems, the utility model is implemented as follows, including:

[0006] bottom wall;

[0007] The side wall and the bottom wall are arranged to form a receiving space with an opening, and the receiving space is used to place the magnetic core and the coil;

[0008] A plurality of pins are fixedly connected to a side of the side wall away from the accommodation space and are arranged at intervals.

[0009] In one embodiment, it further includes a limiting portion, which is located in the accommodating space and fixedly connected to the bottom wall or the side wall;

[0010] Along the first direction, the limiting portion protrudes from the bottom wall, and the limiting portion is configured to limit the movement of the magnetic core;

[0011] The first direction is perpendicular to the bottom wall.

[0012] In one embodiment, two limiting portions are provided, which respectively correspond to two oppositely arranged side walls, and both limiting portions are provided with limiting angles protruding from the side walls, and the two limiting angles are oppositely arranged.

[0013] In one of the embodiments, a side wall facing the accommodating space is provided with an outwardly protruding arc surface.

[0014] In one of the embodiments, a baffle is further included. The baffle is located on the other side of the side wall away from the bottom wall along the first direction. The baffle is fixedly connected to the side wall. The baffle is provided with a groove connecting the pin and the accommodating space.

[0015] The present application also provides a transformer, comprising the transformer skeleton in any one of the above embodiments, and further comprising a connecting portion, a magnetic core and a coil;

[0016] The connecting portion and the accommodating space are complementary in shape to limit the displacement of the connecting portion in the accommodating space. One end of the magnetic core is fixedly connected to the connecting portion. The coil is sleeved on the magnetic core and placed in the accommodating space.

[0017] In one embodiment, two pairs of magnetic cores are provided, including a first magnetic core and a second magnetic core. One end of the first magnetic core is fixedly connected to the connecting portion, and the other end is fixedly connected to one end of the second magnetic core by glue dispensing.

[0018] In one of the embodiments, an upper cover is further included, the other end of the second magnetic core is fixedly connected to the upper cover, and an area of ​​the upper cover close to the second magnetic core is connected to the accommodating space and the pin.

[0019] In one embodiment, the coil is a tortilla-type winding.

[0020] In one embodiment, the coil uses three layers of insulated wire.

[0021] Compared with the prior art, the transformer skeleton in the utility model has the following beneficial effects: the skeleton in the present application does not have a winding column for accommodating the magnetic core, but cuts out a certain accommodating space in the base for placing the coil, and the magnetic core can be connected to the bottom wall of the accommodating space, thereby increasing the utilization space of the base and reducing the volume of the entire skeleton. More importantly, the side wall plays a part in blocking the contact between the coil and the external pin, and the exposed area of ​​the coil is greatly reduced, thereby greatly reducing the risk of breakdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the transformer in the embodiment of the utility model;

[0023] Figure 2 is a top view of three position-limiting portion arrangements in other embodiments;

[0024] Figure 3 yes Figure 1 A schematic diagram of a top view of a transformer skeleton in an embodiment;

[0025] Figure 4 This is a schematic diagram of the overall structure of the transformer in the embodiment of the utility model;

[0026] Figure 5 yes Figure 4A schematic structural diagram of the second magnetic core and the connecting portion in the embodiment;

[0027] Figure 6 is a schematic diagram of the structure after the first magnetic core and the second magnetic core are combined;

[0028] Figure 7 It is a coil diagram of a wire pancake type.

[0029] In the accompanying drawings, the reference numerals represent: bottom wall 110; side wall 120; accommodating space 121; arc surface 122; baffle 123; groove 124; pin 130; limiting portion 140; limiting angle 141; first magnetic core 210; coil 300; connecting portion 400; upper cover 500. DETAILED DESCRIPTION

[0030] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] See also Figure 1 The present application provides a transformer skeleton (hereinafter referred to as skeleton). Figure 1The schematic diagram of the structure of the skeleton is shown, which mainly includes a bottom wall 110 and a side wall 120, and a plurality of pins 130. Among them, the bottom wall 110 is used to support the entire transformer, and generally the bottom wall 110 is at the lowest position of the transformer. The side wall 120 and the bottom wall 110 enclose a receiving space 121 with an opening, and the receiving space 121 is used to place the magnetic core and the coil 300. The plurality of pins 130 are fixedly connected to the side of the side wall 120 away from the receiving space 121 and are arranged at intervals. The number of pins 130 here needs to be determined according to the number of coils 300, and both ends of the coil 300 need to be connected to the pins 130, so as to ensure that the magnetic core and the coil 300 are in a state of being ... Figure 1 For example, if the total number of pins 130 is 8, the number of coils 300 is at most 4, that is, the number of primary coils 300 and secondary coils 300 is at most 8. The number of pins 130 is not fixed, and if a larger number of coils 300 need to be wound, more pins 130 can be set.

[0034] The skeleton in the present application does not have a winding column for accommodating the magnetic core, but cuts out a certain accommodating space 121 in the base for placing the coil 300, and the magnetic core can be connected to the bottom wall 110 of the accommodating space 121, thereby increasing the utilization space of the base and reducing the volume of the entire skeleton. More importantly, the side wall 120 plays a part in blocking the contact between the coil 300 and the external pin 130, and the exposed area of ​​the coil 300 is greatly reduced, thereby greatly reducing the risk of breakdown.

[0035] See also Figure 2 Preferably, in one embodiment, a limiting portion 140 is further included, and the limiting portion 140 is located in the accommodating space 121 and is fixedly connected to the bottom wall 110 or the side wall 120. Along the first direction, the limiting portion 140 protrudes from the bottom wall 110 to limit the movement of the magnetic core. The first direction is perpendicular to the bottom wall 110, and if the transformer is placed horizontally, the first direction is a vertical direction.

[0036] In the above embodiment, the limiting part 140 can have many shapes and numbers, as long as the magnetic core is stuck by the limiting part 140 after being placed in the accommodating space 121. Usually, the magnetic core is a cylinder, and a connecting part 400 is connected to the end to be fixedly connected to the frame. For the specific embodiment of the connecting part 400, please refer to the relevant description of the transformer in this application below.

[0037] The limiting portion 140 can limit two displacement degrees of freedom and one rotational degree of freedom of the magnetic core in a direction parallel to the bottom wall 110 , and the bottom wall 110 can limit the third displacement degree of freedom and two rotational degrees of freedom.

[0038] Preferably, see Figure 1In one embodiment, the present application provides two limiting portions 140, which respectively correspond to the two oppositely arranged side walls 120, and the two limiting portions 140 are both provided with limiting angles 141 protruding from the side walls 120, and the two limiting angles 141 are oppositely arranged.

[0039] In the present application, the limiting portion 140 is a chamfered triangular prism, in which the bottom surface is in contact with the bottom wall 110, and the largest side surface is in contact with the side wall 120. Of course, it can be integrally cast during the skeleton production process, and the remaining two side surfaces are set at obtuse angles. The two limiting portions 140 narrow the lower area of ​​the accommodating space 121 into an "X" shape.

[0040] See also Figure 2 , Figure 2 The simplified top view of three arrangements of the limiting portion 140 in other embodiments is shown, for example Figure 2 As shown on the right side, a quadrangular prism protrudes from the bottom wall, and by inserting the connecting part 400 with a matching groove, the magnetic core can be stabilized. The limiting part 140 provided in this application is easy to process and has a low cost compared to Figure 2 The shapes and positions of the limiting parts 140 are more cost-effective. As long as the limiting parts 140 can limit the displacement and rotation of the magnetic core on the bottom wall 110, it will be sufficient.

[0041] See also Figure 1 and Figure 3 , Figure 3 The top view of the frame is shown. In one embodiment, a side of the side wall 120 facing the receiving space 121 is provided with an arc surface 122 protruding outward.

[0042] It can be understood that the plane space where the limiting portion 140 is located is mainly used to limit the connection portion 400 that is clamped and fixed to the magnetic core, and the accommodating space 121 above the limiting portion 140 is used to place the coil 300. The coil 300 is usually wound into a circle, but when the magnetic core is another shape, the coil 300 will be wound into a similar shape, but the outer peripheral surface is nothing more than a curved figure, such as an ellipse or a circle; or a straight line figure, such as a regular polygon.

[0043] In the present application, the side wall 120 is provided with an arc surface 122 to expand the accommodation space 121 and minimize the thickness of the side wall 120. Without affecting the safety distance between the coil 300 and the pin 130, the transformer can accommodate more coils 300 in the same volume.

[0044] See also Figure 1 and Figure 3In one embodiment, a baffle 123 is further included. The baffle 123 is located along the first direction on the other side of the side wall 120 away from the bottom wall 110. The baffle 123 is fixedly connected to the side wall 120. The baffle 123 is provided with a groove 124 connecting the pin 130 and the accommodation space 121. The groove 124 can maximize the creepage distance without increasing the volume of the skeleton and does not require additional insulation measures such as sleeves. Another function of the groove 124 is to effectively avoid the risk of poor withstand voltage due to the pin 130 being burned or severe welding backburn.

[0045] In this application, see Figure 3 The groove 124 is in an “L” shape, and the risk of breakdown can be reduced by blocking the baffle 123 .

[0046] The skeleton provided by this application, such as Figure 1 As shown, the side walls 120 have only two opposite sides, and the other two sides are not provided, which can reduce the manufacturing cost of the frame. Of course, in the transformer below, there will be additional components filled here to block the coil 300 from the external environment. In the production of the frame, four side walls 120 can also be directly produced, and the limiting part 140 can be omitted, and the magnetic core and the bottom wall 110 can be directly fixedly connected by some fixed connection method. Figure 1 Four pillars are provided at the four corners of the middle frame, and these pillars act as baffles 123 and can be used to connect external devices.

[0047] The present application also provides a transformer, comprising the transformer skeleton in any one of the above embodiments, and further comprising a connecting portion 400, a magnetic core and a coil 300. Figure 4 , Figure 4 The schematic diagram of the structure of the transformer is shown. Of course, as a sophisticated electrical device, the transformer also has other components, but since they all belong to the currently disclosed technology, this application will not introduce them here.

[0048] The transformer provided in the present application adopts the skeleton structure in the above-mentioned embodiment, thereby greatly reducing the height while keeping the number of wound coils 300 unchanged, making the transformer smaller in size while still meeting the safety distance regulations without increasing the risk of the coils 300 being punctured.

[0049] See also Figure 5 , Figure 5 The schematic diagram of the structure of the connecting part 400 and the magnetic core is shown. Figure 5 and Figure 1 It can be seen that the connection part 400 and the limiting part 140 are complementary in shape to limit the displacement of the connection part 400 in the accommodating space 121 , one end of the magnetic core is fixedly connected to the connection part 400 , and the coil 300 is sleeved on the magnetic core and placed in the accommodating space 121 .

[0050] In other embodiments, if the limiting portion 140 is set to other shapes, the connecting portion 400 needs to be set to a corresponding shape to form a complementary state that can be snapped together. If the limiting portion 140 does not exist, the connecting portion 400 can be set to a shape that is compatible with the bottom wall 110, but an additional fixing method is required, such as bonding.

[0051] In other embodiments, if there is no limiting portion 140, the shape of the connecting portion 400 needs to be set to complement the shape of the accommodating space 121. For example, if the bottom area of ​​the accommodating space 121 is a rectangular space, the shape of the connecting portion 400 is set to be a rectangular space, and its four sides are fitted into the accommodating space 121 to limit the displacement of the magnetic core in the accommodating space 121.

[0052] Preferably, see Figure 4 and Figure 5 In order to play the role of the side wall 120, the connecting portion 400 is provided with two protrusions, and both protrusions have arc surfaces 122 to correspond to the arc surfaces 122 of the side walls 120 of the frame, and both play the role of expanding the accommodating space 121.

[0053] See also Figure 4 and Figure 6 , Figure 6 The connection relationship diagram of the first magnetic core 210 and the second magnetic core is shown. In one embodiment, the magnetic core is provided with two pairs, including the first magnetic core 210 and the second magnetic core (the viewing angle is not shown in the figure), one end of the first magnetic core 210 is fixedly connected to the connecting portion 400, and the other end is fixedly connected to one end of the second magnetic core by using glue. In this embodiment, the shape and size of the first magnetic core 210 and the second magnetic core are exactly the same. In other embodiments, the size can be adjusted as needed.

[0054] It is understandable that since both ends of the magnetic core will be connected to other parts, the coil 300 needs to be wound up. Now the coil 300 can be automatically produced into a wire cake type coil 300. For specific shapes, please refer to Figure 7 Therefore, if the magnetic core is set in two pairs, the coil 300 can be directly put on before the two pairs are attached, and then the first magnetic core 210 and the second magnetic core are attached and fixedly connected by glue.

[0055] Preferably, participate Figure 6 In one embodiment, it further includes an upper cover 500 , the other end of the second magnetic core is fixedly connected to the upper cover 500 , and the area of ​​the upper cover 500 close to the second magnetic core is connected to the accommodating space 121 and the pin 130 .

[0056] In the above embodiment, the structure of the upper cover 500 is the same as that of the connecting portion 400, including the recessed side surfaces and the protrusions at both ends, but the functions of the protrusions are the same, both serving as the side walls 120 in the frame, but the functions of the recessed side surfaces are different.

[0057] As mentioned above, the concave side of the connecting portion 400 is to complement the limiting portion 140 to fix the first magnetic core 210 and the second magnetic core. The concave side of the upper cover 500 is to connect the accommodating space 121 and the pin 130. Whether the coil 300 passes through this area to connect the pin 130 depends on the structure of the coil 300.

[0058] Preferably, in one embodiment, the coil 300 is a coil winding, which has been automatically produced.

[0059] Specifically, the coil winding is divided into odd-numbered coils 300 and even-numbered coils 300. Taking a layer of coils 300 as an example, a layer of coils 300 needs to be wound from the inside to the outside, and this circle is wound horizontally, rather than from bottom to top or from bottom to top. That is, the two ends of the coil 300, one end is at the outermost side close to the side wall 120, and the other end is at the innermost side close to the magnetic core. If the innermost end is connected to the coil 300, it needs to occupy a layer of space separately to extend from the innermost side to the outermost side, which will waste the winding space of the coil 300 brought by the length of the magnetic core. Therefore, in the present application, the gap between the recessed side of the upper cover 500 and the baffle 123 is for the wire end of the innermost coil, which extends from the recessed part along the length of the magnetic core to connect to the pin 130, which provides convenience and saves a layer of space, so that the utilization rate of the accommodating space 121 is maximized.

[0060] The even-numbered coils 300 do not need to extend from the upper cover 500, because the multi-layer coils 300 are automatically wound from the outside to the inside. Taking the two-layer coils 300 as an example, when they are wound to the innermost side, the second layer will start to be wound from the inside to the outside. Therefore, both ends of the two-layer coils 300 are at the outermost side close to the side wall 120 and the baffle 123, so they can be directly passed through the lead slot to connect to the pin 130.

[0061] In one embodiment, the coil 300 uses three layers of insulated wires to ensure sufficient creepage distance and electrical clearance between the coils 300 and between the coil 300 and the magnetic core.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transformer skeleton, characterized in that: include bottom wall(110); The side wall (120) and the bottom wall (110) enclose a receiving space (121) having an opening, wherein the receiving space (121) is used to place the magnetic core and the coil (300); A plurality of pins (130), wherein the plurality of pins (130) are fixedly connected to a side of the side wall (120) facing away from the accommodating space (121) and are arranged at intervals.

2. The transformer skeleton according to claim 1, characterized in that: It also includes a limiting portion (140), the limiting portion (140) being located in the accommodating space (121) and fixedly connected to the bottom wall (110) or the side wall (120); Along a first direction, the limiting portion (140) protrudes from the bottom wall (110), and the limiting portion (140) is configured to limit the movement of the magnetic core; The first direction is perpendicular to the bottom wall (110).

3. The transformer skeleton according to claim 2, characterized in that: Two limiting portions (140) are provided, and are respectively connected to two oppositely arranged side walls (120) in a one-to-one correspondence; the two limiting portions (140) are both provided with limiting angles (141) protruding from the side walls (120); and the two limiting angles (141) are oppositely arranged.

4. The transformer skeleton according to claim 2, characterized in that: A side of the side wall (120) facing the accommodating space (121) is provided with an arc surface (122) protruding outward from the side wall (120).

5. The transformer skeleton according to claim 4, characterized in that: It also includes a baffle (123), the baffle (123) being located on the other side of the side wall (120) away from the bottom wall (110) along the first direction, the baffle (123) being fixedly connected to the side wall (120), and the baffle (123) being provided with a groove (124) connecting the accommodating space (121) and the external environment.

6. A transformer, comprising the transformer skeleton according to any one of claims 1 to 5, characterized in that: It also includes a connecting portion (400), a magnetic core and a coil (300); The connecting portion (400) and the accommodating space (121) are complementary in shape so as to limit the displacement of the connecting portion (400) in the accommodating space (121); one end of the magnetic core is fixedly connected to the connecting portion (400); and the coil (300) is sleeved on the magnetic core and placed in the accommodating space (121).

7. The transformer according to claim 6, characterized in that: The magnetic cores are provided in two pairs, comprising a first magnetic core (210) and a second magnetic core (220); one end of the first magnetic core (210) is fixedly connected to the connecting portion (400), and the other end is fixedly connected to one end of the second magnetic core (220) by glue dispensing.

8. The transformer according to claim 7, characterized in that: It also comprises an upper cover (500), to which the other end of the second magnetic core (220) is fixedly connected, and a region of the upper cover (500) close to the second magnetic core (220) is connected to the accommodating space (121) and the pin (130).

9. The transformer according to claim 6, characterized in that: The coil (300) is a coil-type winding.

10. The transformer according to claim 6, characterized in that: The coil (300) uses three layers of insulated wire.

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