High isolation electronic transformer

Abstract

The present invention provides a high-isolation electronic transformer. The high-isolation electronic transformer includes an insulating housing. The insulating housing is provided with an open magnetic core cavity for installing a magnetic core. The opening of the open magnetic core cavity is located on the front side wall of the insulating housing. Two or more first-stage pins are provided at the opening of the open magnetic core cavity. Two or more second-stage pins are provided on the rear outer side wall of the insulating housing facing away from the opening. Both the first-stage pins and the second-stage pins are arranged near the bottom position of the insulating housing. Two or more lead grooves are provided on the top and the rear outer side wall of the insulating housing. The lead grooves extend from the opening towards the direction of the second-stage pins. The high-isolation electronic transformer of the present invention can increase the creepage distance between the primary pins and the secondary pins, improve the safety performance. At the same time, through the special design of the pins, automatic winding of the end feet, automatic wire splitting and automatic laser peeling in the subsequent process are realized, greatly improving the production efficiency and the reliability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of transformers, and specifically, to a high-isolation electronic transformer. Background Art

[0002] An electronic transformer is an electronic device that converts the alternating voltage of the mains into direct current and then forms a high-frequency alternating voltage output through semiconductor switching devices, electronic components, and high-frequency transformer windings. It is also an AC-DC-AC inverter circuit described in electronics theory.

[0003] In existing transformers, since the insulating material between the primary pin and the secondary pin is easily polarized by the electrode, a charged area where the insulating material shows a charged phenomenon is caused, making the safety of the transformer poor. Therefore, when designing a transformer, the creepage distance and electrical clearance between the primary pin and the secondary pin need to be considered. In an existing transformer, by setting lead grooves on two sides of the insulating housing of the transformer and connecting the lead wires from the side across the side to the pins, this will cause the creepage distance and electrical clearance between the primary pin and the secondary pin to become smaller, resulting in poor safety.

[0004] In addition, due to the use of gull-wing lead terminals in existing transformers, operations such as automatic winding, automatic wire splitting, and automatic laser peeling cannot be achieved. Manual operation is time-consuming and laborious, and more importantly, the reliability of the product cannot be guaranteed.

[0005] Therefore, it is necessary to design a more optimized transformer structure to increase the insulation between the primary pin and the secondary pin. At the same time, it is necessary to redesign and optimize the lead terminals to achieve automated production. Summary of the Invention

[0006] The main object of the present invention is to provide a high-isolation electronic transformer that increases the creepage distance between the primary pin and the secondary pin and improves the safety performance.

[0007] To achieve the above main object, the high-isolation electronic transformer provided by the present invention includes an insulating housing. The insulating housing is provided with an open magnetic core cavity for installing a magnetic core. The opening of the open magnetic core cavity is located on the front side wall of the insulating housing. Two or more first-stage pins are provided at the opening of the open magnetic core cavity. Two or more second-stage pins are provided on the rear outer side wall of the insulating housing facing away from the opening. Both the first-stage pins and the second-stage pins are provided near the bottom position of the insulating housing. Two or more lead grooves are provided on the top and rear outer side wall of the insulating housing, and the lead grooves extend from the opening in the direction of the second-stage pins.

[0008] As can be seen from the above solution, in the high-isolation electronic transformer of the present invention, lead grooves are provided on the top and the rear outer sidewall of the insulating housing for installing lead wires. Compared with the existing structure where the lead wires cross from the side, the creepage distance and the electrical clearance between the primary pins and the secondary pins of the transformer are increased, thereby improving the insulation performance of the primary pins and the secondary pins and enhancing the safety.

[0009] In a further solution, any two lead grooves are arranged in parallel.

[0010] As can be seen, the parallel arrangement of the lead grooves makes the lead wire layout more reasonable.

[0011] In a further solution, a plurality of grooves are provided at the bottom of the insulating housing, and the plurality of grooves all extend from the left outer sidewall of the insulating housing to the right outer sidewall of the insulating housing, and the plurality of grooves are arranged in parallel.

[0012] As can be seen, by providing a plurality of grooves at the bottom, the creepage distance and the electrical clearance between the primary pins and the secondary pins are further increased, and the insulation performance is further enhanced.

[0013] In a further solution, both the first-stage pins and the second-stage pins are U-shaped pins.

[0014] As can be seen, both the first-stage pins and the second-stage pins are U-shaped pins, which can realize automatic winding of end feet, automatic wire splitting and automatic laser peeling in subsequent processes, so as to ultimately achieve automated production, greatly improving production efficiency and product quality.

[0015] In a further solution, the first end of the first-stage pin is close to the opening of the open magnetic core cavity, and the second end of the first-stage pin extends out from the bottom of the insulating housing.

[0016] As can be seen, the first end of the first-stage pin being close to the opening of the open magnetic core cavity facilitates the winding and connection of the lead wire, and the second end of the first-stage pin extending out from the bottom of the insulating housing facilitates subsequent welding and installation.

[0017] In a further solution, the length of the first end of the first-stage pin extending out of the front sidewall is greater than the length of the second end of the first-stage pin extending out of the front sidewall.

[0018] As can be seen, the length of the first end of the first-stage pin extending out of the front sidewall being greater than the length of the second end of the first-stage pin extending out of the front sidewall facilitates the installation of the lead wire at the first end of the first-stage pin.

[0019] In a further solution, the first end of the second-stage pin is located on the side close to the lead groove, and the second end of the second-stage pin extends out from the bottom of the insulating housing.

[0020] It can be seen that the first end of the second-stage pin is located on the side close to the lead groove, which is convenient for winding and leading out the wire, and the second end of the second-stage pin extends out from the bottom of the insulating housing, which is convenient for subsequent welding and installation.

[0021] In a further solution, the length of the outer side wall after the first end of the second-stage pin extends out is greater than the length of the outer side wall after the second end of the first-stage pin extends out.

[0022] It can be seen that the length of the outer side wall after the first end of the second-stage pin extends out is greater than the length of the outer side wall after the second end of the first-stage pin extends out, which is convenient for installing and leading out the wire at the first end of the second-stage pin.

[0023] In a further solution, the surface of the outer side wall is inclined with respect to the top.

[0024] It can be seen that the surface of the outer side wall is inclined with respect to the top, which can shorten the lead length and save materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a structural diagram of an embodiment of the high-isolation electronic transformer of the present invention.

[0026] Figure 2 is a structural diagram of one perspective of the insulating housing in an embodiment of the high-isolation electronic transformer of the present invention.

[0027] Figure 3 is a structural diagram of another perspective of the insulating housing in an embodiment of the high-isolation electronic transformer of the present invention.

[0028] Figure 4 is a structural diagram of yet another perspective of the insulating housing in an embodiment of the high-isolation electronic transformer of the present invention.

[0029] Figure 5 is a structural cross-sectional view of the insulating housing in an embodiment of the high-isolation electronic transformer of the present invention.

[0030] The present invention will be further described below with reference to the drawings and embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] As Figure 1 shown, in this embodiment, the high-isolation electronic transformer includes an insulating housing 1 and a magnetic core 2, and the magnetic core 2 is installed in the insulating housing 1. The insulating housing 1 is made of plastic, and the magnetic core 2 is wound with a primary coil and a secondary coil. Winding coils on the magnetic core is a well-known technology to those skilled in the art and will not be elaborated here.

[0032] See Figure 2 and Figure 3, the insulating housing 1 is provided with an open magnetic core cavity 11 for installing the magnetic core 2. The opening of the open magnetic core cavity 11 is located on the front side wall 12 of the insulating housing 1. More than two first-stage pins 13 are provided at the opening of the open magnetic core cavity 11. More than two second-stage pins 14 are provided on the rear outer side wall 16 of the insulating housing 1 facing away from the opening. Both the first-stage pins 13 and the second-stage pins 14 are arranged near the bottom position of the insulating housing 1. The number of the first-stage pins 13 is determined by the number of primary coils, and the number of the second-stage pins 14 is determined by the number of secondary coils. In this embodiment, the number of the first-stage pins 13 is 3, and the number of the second-stage pins 14 is 3. The lead wires of the primary coils are connected to the corresponding first-stage pins 13, and the lead wires of the secondary coils are connected to the corresponding second-stage pins 14. Of course, it can also be that the first-stage pins 13 are correspondingly connected to the lead wires of the secondary coils, and the second-stage pins 14 are correspondingly connected to the lead wires of the primary coils.

[0033] More than two lead wire grooves 17 are provided on the top 15 and the rear outer side wall 16 of the insulating housing 1. The lead wire grooves 17 extend from the opening towards the direction of the second-stage pins 14. The lead wires of the secondary coils are located in the lead wire grooves 17. Any two lead wire grooves 17 are arranged in parallel. The number of the lead wire grooves 17 is determined by the number of secondary coils. In this embodiment, the number of the lead wire grooves 17 is 4. The surface of the rear outer side wall 16 is inclined with respect to the top 15.

[0034] See Figure 4 , a plurality of grooves 18 are provided at the bottom of the insulating housing 1. The plurality of grooves 18 all extend from the left outer side wall of the insulating housing to the right outer side wall of the insulating housing 1. The plurality of grooves 18 are arranged in parallel. The plurality of grooves 18 are evenly arranged at the bottom of the insulating housing 1, and the width of each groove 18 is equal. The number of the grooves 18 can be set as required. In this embodiment, the number of the grooves 18 is two. By providing the plurality of grooves 18, the climbing distance of the first-stage pins 13 and the second-stage pins 14 at the bottom of the insulating housing 1 is increased, thereby improving the insulation performance.

[0035] See Figure 5, the first - stage pin 13 and the second - stage pin 14 are both integrally provided with the insulating housing 1. Both the first - stage pin 13 and the second - stage pin 14 are U - shaped pins. The first end 121 of the first - stage pin 13 is close to the opening of the opening magnetic - core cavity 11, and the second end 122 of the first - stage pin 13 extends out from the bottom of the insulating housing 1. The length that the first end 121 of the first - stage pin 13 extends out of the front side wall 12 of the insulating housing 1 is greater than the length that the second end 122 of the first - stage pin 13 extends out of the front side wall 12 of the insulating housing 1. The first end 131 of the second - stage pin 14 is located on the side close to the lead groove 17, and the second end 132 of the second - stage pin 14 extends out from the bottom of the insulating housing 1. The length that the first end 131 of the second - stage pin 14 extends out of the rear outer side wall 16 of the insulating housing 1 is greater than the length that the second end 122 of the first - stage pin 13 extends out of the rear outer side wall 16 of the insulating housing 1.

[0036] As can be seen from the above, by arranging the lead groove 17 on the top 15 and the rear outer side wall 16 of the insulating housing 1 for installing the lead - out wire, the creepage distance and the electrical clearance of the primary pins and the secondary pins of the transformer are increased compared with the existing structure where the lead - out wire crosses from the side. Thus, the insulation performance of the primary pins and the secondary pins is improved, and the safety is increased. At the same time, by arranging a plurality of grooves 18 at the bottom, the creepage distance and the electrical clearance of the primary pins and the secondary pins are further increased, and the insulation performance is further enhanced. In addition, both the first - stage pin 13 and the second - stage pin 14 are U - shaped pins, which can realize automatic end - winding, automatic wire - separating and automatic laser skin - peeling in subsequent processes, so as to finally achieve automated production, greatly improving the production efficiency and product quality.

[0037] It should be noted that the above is only the preferred embodiment of the present invention, but the design concept of the invention is not limited thereto. Any non - substantial modification made to the present invention using this concept also falls within the protection scope of the present invention.

Claims

1. A high-isolation electronic transformer, comprising an insulating housing, wherein the insulating housing is provided with an open magnetic core cavity for installing a magnetic core, and is characterized in that, the opening of the open magnetic core cavity is located on the front side wall of the insulating housing, and more than two first-stage pins are arranged at the opening of the open magnetic core cavity; more than two second-stage pins are arranged on the rear outer side wall of the insulating housing facing away from the opening, and both the first-stage pins and the second-stage pins are arranged near the bottom position of the insulating housing; more than two lead grooves are arranged on the top and the rear outer side wall of the insulating housing, and the lead grooves extend from the opening towards the direction of the second-stage pins; a plurality of grooves are arranged at the bottom of the insulating housing, and the plurality of grooves all extend from the left outer side wall of the insulating housing towards the right outer side wall of the insulating housing, and the plurality of grooves are arranged in parallel; both the first-stage pins and the second-stage pins are U-shaped pins; the first end of the first-stage pin is close to the opening of the open magnetic core cavity, and the second end of the first-stage pin extends out from the bottom of the insulating housing; the first end of the second-stage pin is located on the side close to the lead groove, and the second end of the second-stage pin extends out from the bottom of the insulating housing.

2. The high-isolation electronic transformer according to claim 1, characterized in that, any two of the lead grooves are arranged in parallel.

3. The high-isolation electronic transformer according to claim 1 or 2, characterized in that, the length of the first end of the first-stage pin extending out of the front side wall is greater than the length of the second end of the first-stage pin extending out of the front side wall.

4. The high-isolation electronic transformer according to claim 3, characterized in that, the length of the first end of the second-stage pin extending out of the rear outer side wall is greater than the length of the second end of the first-stage pin extending out of the rear outer side wall.

5. The high-isolation electronic transformer according to claim 1 or 2, characterized in that, the surface of the rear outer side wall is inclined with respect to the top.

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