LLC magnetic integrated transformer

Abstract

The utility model discloses an LLC magnetic integrated transformer, and relates to the technical field of LLC magnetic integrated transformers. The LLC magnetic integration transformer comprises an inductor magnetic core and a transformer magnetic core, the inductor magnetic core and the transformer magnetic core are both arranged to be in a U shape, and the surfaces of the sides, close to the transformer magnetic core, of the inductor magnetic core are fixedly connected with a first connecting protrusion and a second connecting protrusion correspondingly; the first protruding column and the second protruding column are fixedly connected to the surface of the side, close to the transformer magnetic core, of the inductor magnetic core, the primary coil and the secondary coil can be wound internally and externally separately, the inner side and the outer side are isolated and separated, and therefore the electrical safety distance is increased, the influence of leakage magnetic flux is reduced, and the efficiency of the transformer can be improved; meanwhile, the insulation performance between the coils can be improved, the turn ratio of the primary coil to the secondary coil can be adjusted according to the design requirement to adapt to different voltage conversion requirements, the mutual inductance effect between the primary coil and the secondary coil is reduced, and therefore energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of LLC magnetic integrated transformers, in particular to an LLC magnetic integrated transformer. Background Art

[0002] Transformers are magnetic components frequently used in various electrical devices. They use the principle of electrical and magnetic energy conversion induction to adjust different voltages so that they can reach the range that the electrical devices can use. The LLC magnetic integrated integrated transformer is a high-frequency transformer that is widely used in power electronic devices such as switching power supplies, frequency converters, and inverters. LLC refers to the LCL resonant converter, where "L" represents inductance and "C" represents capacitance.

[0003] In the prior art, since the LLC converter can operate at a lower switching frequency, a smaller and lighter transformer can be designed. The integrated design means that the transformer and other circuit components (such as switching tubes, control ICs, etc.) are integrated into one module, which can reduce external connections and improve the reliability and stability of the system. LLC transformers usually require the use of multiple magnetic cores to form two closed magnetic circuits, which makes the LLC transformer larger in size, complex in production process and high in cost. At the same time, the leads of each coil are directly plugged into the electronic device through pins, and additional resonant inductance needs to be added during use, which greatly increases the cost of use and limits its applicability and practicality. In view of this, we propose an LLC magnetic integrated transformer. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an LLC magnetic integrated transformer that can solve the above-mentioned problem.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an LLC magnetic integrated transformer, comprising an inductor core and a transformer core, wherein the inductor core and the transformer core are both arranged in a U shape, and the side surfaces of the inductor core and the transformer core that are close to each other are fixedly connected with a first connecting protrusion and a second connecting protrusion, respectively, and the side surfaces of the inductor core and the transformer core that are close to each other are fixedly connected with a first protrusion and a second protrusion, respectively, and a locking protrusion is arranged between the inductor core and the transformer core, and the upper side surface of the locking protrusion is provided with a through groove extending from its lower side surface.

[0006] Preferably, the lower surface of the locking protrusion is fixedly connected to the transformer frame, the through groove is adapted to the first connecting protrusion and the second connecting protrusion, and the front and rear side surfaces of the transformer frame are respectively provided with connection terminals.

[0007] Preferably, the left and right side surfaces of the transformer skeleton are respectively fixedly connected with fitting protrusions, and the fitting protrusions are arranged in a triangle shape.

[0008] Preferably, the upper side surface of the fitting protrusion is set as an inclined surface, and the outer surface of the locking protrusion is sleeved with an inductor winding.

[0009] Preferably, the upper surface of the inductor winding is provided with a locking groove extending from the lower surface of the device, and the locking groove is adapted to the locking protrusion.

[0010] Preferably, the lower surface of the inductor winding is fixedly connected to the inductor frame, and the lower surface of the inductor frame is provided with an avoidance groove.

[0011] Preferably, the avoidance groove extends out of the left and right side surfaces of the inductor frame, and a fitting groove is provided on the lower side surface of the inductor frame.

[0012] Preferably, the fitting groove is matched with the fitting protrusion.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) The LLC magnetic integrated transformer can wind its primary and secondary coils separately inside and outside, and isolate the inside and outside, thereby increasing the electrical safety distance, reducing the influence of leakage flux, and improving the efficiency of the transformer. At the same time, it can also improve the insulation performance between the coils, reduce the risk of short circuit, and adjust the turns ratio of the primary and secondary coils according to design requirements to adapt to different voltage conversion requirements, reduce the mutual inductance effect between the primary and secondary coils, and thus reduce energy loss.

[0015] (2) The LLC magnetic integrated transformer uses the avoidance groove to fit with the protrusion on the transformer frame to improve the stability after connection. At the same time, the lower components will not shake when the transformer core is installed by means of the clamping connection between the fitting groove and the fitting protrusion. After the transformer core is installed, the first connecting protrusion and the second connecting protrusion are inserted into the interior of the through groove to improve the overall stability. The frame formed by the transformer core and the inductor core can be used for easy subsequent fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the structure of the LLC magnetic integrated transformer of the utility model;

[0018] Figure 2 This is the first explosion diagram of the overall structure of the utility model;

[0019] Figure 3This is the second explosion diagram of the overall structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the separation of the overall structure of the utility model.

[0021] Figure numerals: 1, inductor core; 2, transformer core; 3, first connecting protrusion; 4, second connecting protrusion; 5, first boss; 6, second boss; 7, locking protrusion; 8, through groove; 9, transformer frame; 10, terminal; 11, fitting protrusion; 12, inductor winding; 13, inductor frame; 14, avoidance groove; 15, fitting groove; 16, locking groove. DETAILED DESCRIPTION

[0022] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0023] See also Figure 1-4 The utility model provides a technical solution: LLC magnetic integrated transformer, including an inductor core 1 and a transformer core 2, the inductor core 1 and the transformer core 2 are both arranged in a U shape, and the side surfaces of the inductor core 1 close to the transformer core 2 are fixedly connected with a first connecting protrusion 3 and a second connecting protrusion 4, respectively, and the side surfaces of the inductor core 1 close to the transformer core 2 are fixedly connected with a first protrusion 5 and a second protrusion 6, respectively, a locking protrusion 7 is provided between the inductor core 1 and the transformer core 2, and the upper side surface of the locking protrusion 7 is provided with a through groove 8 extending from its lower side surface, so that the primary and secondary coils can be wound separately inside and outside, and the inside and outside can be isolated and separated, thereby increasing the electrical safety distance, reducing the influence of leakage flux, and improving the efficiency of the transformer. At the same time, it can also improve the insulation performance between the coils, reduce the risk of short circuit, and can adjust the turns ratio of the primary and secondary coils according to design requirements to adapt to different voltage conversion requirements, reduce the mutual inductance effect between the primary and secondary coils, and thus reduce energy loss.

[0024] Furthermore, the lower surface of the positioning protrusion 7 is fixedly connected to the transformer skeleton 9, the through groove 8 is adapted to the first connecting protrusion 3 and the second connecting protrusion 4, the front and rear surfaces of the transformer skeleton 9 are respectively provided with terminal blocks 10, the left and right surfaces of the transformer skeleton 9 are respectively fixedly connected with fitting protrusions 11, the fitting protrusions 11 are set as a triangle, the upper surface of the fitting protrusion 11 is set as an inclined surface, the outer surface of the positioning protrusion 7 is provided with an inductor winding 12, the upper surface of the inductor winding 12 is provided with a positioning groove 16 extending from the lower surface of the device, the positioning groove 16 is adapted to the positioning protrusion 7, the lower surface of the inductor winding 12 is fixedly connected to the inductor skeleton 13, the inductor skeleton 13 is provided with a plurality of An avoidance groove 14 is provided on the lower surface, and the avoidance groove 14 extends from the left and right side surfaces of the inductor skeleton 13. A fitting groove 15 is provided on the lower surface of the inductor skeleton 13, and the fitting groove 15 is adapted to the fitting protrusion 11. The avoidance groove 14 is matched with the protrusion on the transformer skeleton 9 to improve the stability after connection. At the same time, the fitting groove 15 and the fitting protrusion 11 are clamped together to prevent the lower components from shaking when the transformer core 2 is installed. After the transformer core 2 is installed, the first connecting protrusion 3 and the second connecting protrusion 4 are inserted into the interior of the through groove 8 to improve the overall stability, and the frame formed by the transformer core 2 and the inductor core 1 can be used for subsequent fixation.

[0025] Working principle: During installation, first place the inductor core 1 on the bottom surface, and place the transformer skeleton 9 on top of the inductor core 1, and make the through slot 8 opened on the positioning protrusion 7 and the first connecting protrusion 3, then press the transformer skeleton 9 downward so that the first connecting protrusion 3 enters the through slot 8. At this time, the left surface of the first protrusion 5 contacts the right surface of the transformer skeleton, then place the inductor skeleton 13 on the upper surface of the transformer skeleton 9, and make the positioning slot 16 aligned with the positioning protrusion 7, then press the inductor winding 12 downward, The locking groove 16 is sleeved on the outer surface of the locking protrusion 7. At this time, the upper surface of the locking protrusion 7 is flush with the upper surface of the inductor winding 12, and when the inductor winding 12 is pressed to make the inductor frame 13 drop together, the fitting protrusion 11 is inserted into the inside of the fitting groove 15 with the help of the inclined surface, thereby completing the fixation, and the avoidance groove 14 can make the inductor frame 13 fit with the protrusion on the transformer frame 9, and then the transformer core 2 is placed above the inductor frame 13, and the second connecting protrusion 4 is aligned with the through groove 8 on the locking protrusion 7 and inserted.

[0026] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. An LLC magnetic integrated transformer, comprising an inductor core (1) and a transformer core (2), characterized in that: The inductor core (1) and the transformer core (2) are both arranged in a U shape; a first connection protrusion (3) and a second connection protrusion (4) are fixedly connected to the adjacent side surfaces of the inductor core (1) and the transformer core (2); a first convex column (5) and a second convex column (6) are fixedly connected to the adjacent side surfaces of the inductor core (1) and the transformer core (2); a locking protrusion (7) is arranged between the inductor core (1) and the transformer core (2); and a through groove (8) extending from the lower side surface of the locking protrusion (7) is provided on the upper side surface.

2. The LLC magnetic integrated transformer according to claim 1, characterized in that: The lower surface of the locking protrusion (7) is fixedly connected to a transformer frame (9), the through groove (8) is adapted to the first connection protrusion (3) and the second connection protrusion (4), and the front and rear surfaces of the transformer frame (9) are respectively provided with connection terminals (10).

3. The LLC magnetic integrated transformer according to claim 2, characterized in that: The left and right side surfaces of the transformer skeleton (9) are respectively fixedly connected with fitting protrusions (11), and the fitting protrusions (11) are arranged in a triangle shape.

4. The LLC magnetic integrated transformer according to claim 3, characterized in that: The upper side surface of the fitting protrusion (11) is arranged as an inclined surface, and the outer surface of the locking protrusion (7) is sleeved with an inductor winding (12).

5. The LLC magnetic integrated transformer according to claim 4, characterized in that: The upper surface of the inductor winding (12) is provided with a locking groove (16) extending from the lower surface of the device, and the locking groove (16) is adapted to the locking protrusion (7).

6. The LLC magnetic integrated transformer according to claim 5, characterized in that: The lower surface of the inductor winding (12) is fixedly connected to an inductor frame (13), and the lower surface of the inductor frame (13) is provided with an avoidance groove (14).

7. The LLC magnetic integrated transformer according to claim 6, characterized in that: The avoidance groove (14) extends from the left and right side surfaces of the inductor frame (13), and a fitting groove (15) is provided on the lower side surface of the inductor frame (13).

8. The LLC magnetic integrated transformer according to claim 7, characterized in that: The fitting groove (15) is matched with the fitting protrusion (11).

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