Main transformer for micro inverter

Abstract

The utility model discloses a main transformer for a miniature inverter, and particularly relates to the technical field of main transformers, which comprises a transformer framework, a transformer magnetic core is fixedly arranged at the top end of the transformer framework, a first welding piece and a second welding piece are fixedly arranged at the front end of the transformer magnetic core, and a transformer winding coil group is arranged at the rear end of the transformer magnetic core. A third welding piece and a fourth welding piece are fixedly arranged at the rear end of the transformer magnetic core, the bottom end of the fourth welding piece is fixedly welded to the top of the transformer winding coil assembly, and a first wiring pin and a second wiring pin are fixedly arranged on the transformer winding coil assembly and the front side of the bottom end of the transformer framework. The transformer winding coil assembly is exposed in the air so as to facilitate heat dissipation, air at the welding position can be isolated by smearing the black glue, the situation that welding firmness is reduced due to air oxidation is avoided, meanwhile, the whole main transformer is designed to be flat, the occupied area can be reduced, and better installation and use are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of main transformer technology, and more specifically to a main transformer for a micro inverter. Background Technology

[0002] A microinverter is a low-power inverter primarily used to convert direct current (DC) generated by a single or a few photovoltaic (PV) panels into alternating current (AC). It differs from traditional centralized inverters and string inverters, which centrally convert DC power generated by multiple PV modules. In a microinverter, a key role of the transformer is voltage transformation. The DC voltage generated by PV panels is typically low, generally around 12-48V. To convert this to AC voltage suitable for grid connection, a transformer is needed to step up the voltage. This effectively increases the voltage, allowing the output AC power to be successfully connected to the grid or to supply local AC loads.

[0003] Existing microinverters use a single transformer core and multiple pins as the main transformer. For example, the prior art publication CN219800631U describes a magnetically integrated transformer for a microinverter, a microinverter, and a photovoltaic system. This invention includes a transformer frame, a magnet, and multiple coil groups. The transformer frame has multiple pins, and the transformer core is mounted on the transformer frame. Multiple coil mounting cavities are formed within the transformer core, spaced apart sequentially. Each coil mounting cavity contains a winding post, and the number of coil groups corresponds to the number of coil mounting cavities.

[0004] However, the existing technology has the following problems when used: the transformer winding coil in the main transformer of the micro inverter is usually installed inside the transformer core, and the heat dissipation speed is slow, which will cause the temperature of the entire transformer to rise, thus affecting the normal power of the main transformer. Based on this, the present invention provides a main transformer for micro inverters that is small in size and has good heat dissipation. Utility Model Content

[0005] To overcome the aforementioned deficiencies in the prior art, this utility model provides a main transformer for a micro inverter. By exposing the transformer winding coils to the air for heat dissipation, and by applying black glue between the first, second, and third welded parts and the top of the transformer frame, and between the bottom of the fourth welded part and the top of the transformer winding coils, the black glue can isolate the air at the weld joints, preventing air oxidation from reducing the weld strength. At the same time, the entire main transformer has a flat design, which can reduce the occupied area and facilitate better installation and use, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a main transformer for a micro inverter, comprising a transformer frame, a transformer core fixedly mounted at the top of the transformer frame, a first welded component and a second welded component fixedly mounted at the front end of the transformer core, and a transformer winding coil assembly at the rear end of the transformer core. The transformer winding coil assembly is a key component of the transformer, made of wire with an insulating layer, which converts the input voltage into the output voltage through the principle of electromagnetic induction, realizing the transmission and distribution of electrical energy. A third welded component and a fourth welded component are fixedly mounted at the rear end of the transformer core, and the bottom end of the fourth welded component is fixedly welded to the top of the transformer winding coil assembly. The transformer winding coil assembly has a first and a second terminal pin fixedly mounted on the front side of the bottom end of the transformer frame, and a third, fourth, fifth, and sixth terminal pin fixedly mounted on the rear side of the bottom end of the transformer frame for connecting the transformer circuit.

[0007] In a preferred embodiment, the first welded component, the second welded component, the third welded component, and the transformer winding coil are all fixed to the top of the transformer frame for normal use of the micro inverter.

[0008] In a preferred embodiment, black adhesive is fixedly bonded between the first, second, and third welded parts and the top of the transformer frame, and between the bottom of the fourth welded part and the top of the transformer winding coil. The black adhesive applied to the weld joint can enhance the reliability of the weld joint, provide electrical insulation protection, and prevent oxidation and corrosion of the weld joint. Therefore, by using black adhesive at the weld joints of the first, second, third, and fourth welded parts, oxidation can be prevented and the weld strength can be improved.

[0009] In a preferred embodiment, welding tape is fixedly pasted on both the front and rear sides of the bottom end of the transformer frame. Specifically, welding tape is a special tape widely used in industries such as electronics, batteries, and automobile manufacturing. It has high temperature resistance and electrical insulation properties. Therefore, setting welding tape can play an insulating protection role at the bottom of the transformer frame.

[0010] In a preferred embodiment, the third, fourth, fifth, and sixth connection pins are evenly distributed at the bottom of the transformer frame to avoid mutual interference between the third, fourth, fifth, and sixth connection pins.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] This invention exposes the transformer winding coil to the air for heat dissipation. Black glue is applied between the first, second, and third welded parts and the top of the transformer frame, and between the bottom of the fourth welded part and the top of the transformer winding coil. The black glue can isolate the air at the weld, preventing air oxidation from reducing the weld's strength. At the same time, the entire main transformer has a flat design, which can reduce the occupied area and facilitate better installation and use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a side view of the overall structure of this utility model;

[0015] Figure 3 This is a top view of the overall structure of this utility model;

[0016] Figure 4 This is a bottom view of the overall structure of this utility model.

[0017] The attached diagram is labeled as follows: 1. Transformer frame; 2. Transformer core; 3. First welded component; 4. Second welded component; 5. Transformer winding coil assembly; 6. Third welded component; 7. Fourth welded component; 8. First terminal pin; 9. Second terminal pin; 10. Third terminal pin; 11. Fourth terminal pin; 12. Fifth terminal pin; 13. Sixth terminal pin; 14. Black adhesive; 15. Soldering tape. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Refer to the instruction manual appendix Figure 1-4 This utility model provides a main transformer for a micro inverter, including a transformer frame 1. A transformer core 2 is fixedly provided at the top of the transformer frame 1. A first welding part 3 and a second welding part 4 are fixedly provided at the front end of the transformer core 2. A transformer winding coil 5 is provided at the rear end of the transformer core 2. The transformer winding coil 5 is a key component in the transformer. It is made of wire with an insulating layer and converts the input voltage into the output voltage through the principle of electromagnetic induction to realize the transmission and distribution of electrical energy.

[0020] The rear end of the transformer core 2 is fixedly provided with a third welding part 6 and a fourth welding part 7. The bottom end of the fourth welding part 7 is fixedly welded to the top of the transformer winding coil 5. The front side of the bottom end of the transformer frame 1 is fixedly provided with a first connection pin 8 and a second connection pin 9. The rear side of the bottom end of the transformer frame 1 is fixedly provided with a third connection pin 10, a fourth connection pin 11, a fifth connection pin 12 and a sixth connection pin 13 for connecting the transformer lines. The third connection pin 10, the fourth connection pin 11, the fifth connection pin 12 and the sixth connection pin 13 are evenly distributed at the bottom of the transformer frame 1 to avoid mutual interference between the third connection pin 10, the fourth connection pin 11, the fifth connection pin 12 and the sixth connection pin 13.

[0021] Furthermore, the first welded component 3, the second welded component 4, the third welded component 6, and the transformer winding coil group 5 are all fixed to the top of the transformer frame 1 for normal use of the micro inverter;

[0022] Furthermore, black glue 14 is fixedly bonded between the first welded part 3, the second welded part 4, and the third welded part 6 and the top of the transformer frame 1, and between the bottom of the fourth welded part 7 and the top of the transformer winding coil 5. The black glue 14 applied to the weld joint can enhance the reliability of the weld joint, provide electrical insulation protection, and prevent oxidation and corrosion of the weld joint. Therefore, by using black glue 14 at the weld joints of the first welded part 3, the second welded part 4, the third welded part 6, and the fourth welded part 7, oxidation can be prevented and the weld strength can be improved.

[0023] Soldering tape 15 is fixedly pasted on both the front and rear sides of the bottom end of the transformer frame 1. Specifically, the soldering tape 15 is a special tape widely used in industries such as electronics, batteries, and automobile manufacturing. It has high temperature resistance and electrical insulation properties. Therefore, the soldering tape 15 can play an insulating protection role at the bottom of the transformer frame 1.

[0024] In use, the transformer can be used normally by cooperating with the transformer core 2 through the first welding part 3, the second welding part 4, the third welding part 6, the fourth welding part 7, the first terminal pin 8, the second terminal pin 9, the third terminal pin 10, the fourth terminal pin 11, the fifth terminal pin 12, and the sixth terminal pin 13. By installing the transformer winding coil 5 behind the transformer core 2, the transformer winding coil 5 is exposed to the air, which facilitates heat dissipation. Black glue 14 is applied between the first welding part 3, the second welding part 4, and the third welding part 6 and the top of the transformer frame 1, and between the bottom of the fourth welding part 7 and the top of the transformer winding coil 5. The black glue 14 can isolate the air at the welding point, thereby avoiding air oxidation, which can greatly improve the firmness and the service life of the entire main transformer. In addition, the entire main transformer has a flat design, which can reduce the occupied area and facilitate better installation and use.

[0025] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A main transformer for a micro inverter, characterized in that: The transformer includes a transformer frame (1), a transformer core (2) is fixedly provided at the top of the transformer frame (1), a first welded part (3) and a second welded part (4) are fixedly provided at the front end of the transformer core (2), a transformer winding coil group (5) is provided at the rear end of the transformer core (2), a third welded part (6) and a fourth welded part (7) are fixedly provided at the rear end of the transformer core (2), and the bottom end of the fourth welded part (7) is fixedly welded to the top of the transformer winding coil group (5). The transformer frame (1) is fixedly provided with a first connection pin (8) and a second connection pin (9) on the front side of the bottom end, and a third connection pin (10), a fourth connection pin (11), a fifth connection pin (12) and a sixth connection pin (13) are fixedly provided on the rear side of the bottom end.

2. The main transformer for a micro inverter according to claim 1, characterized in that: The first welded component (3), the second welded component (4), the third welded component (6) and the transformer winding coil group (5) are all fixed to the top of the transformer frame (1).

3. The main transformer for a micro inverter according to claim 1, characterized in that: Black glue (14) is fixedly bonded between the first welded part (3), the second welded part (4) and the third welded part (6) and the top of the transformer frame (1), and between the bottom of the fourth welded part (7) and the top of the transformer winding coil group (5).

4. The main transformer for a micro inverter according to claim 1, characterized in that: The transformer frame (1) has welding tape (15) fixedly pasted on both the front and rear sides of its bottom end.

5. The main transformer for a micro inverter according to claim 1, characterized in that: The third connection pin (10), the fourth connection pin (11), the fifth connection pin (12) and the sixth connection pin (13) are evenly distributed at the bottom of the transformer frame (1).

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