CN115691981A - A vertical shielded pulse transformer - Google Patents

Abstract

The invention discloses a vertical shielding type pulse transformer, which is applied to the field of micro transformers and comprises a winding magnetic core body and a magnetic shielding cover, wherein the winding magnetic core body comprises: a column portion magnetic core; a first magnetic circuit core and a second magnetic circuit core connected to both ends of the columnar portion core, respectively; a plurality of winding coils wound on the magnetic core of the columnar part and connected with the electrode plates; grooves with the number matched with the number of the winding coils are arranged on the first magnetic circuit core and the second magnetic circuit core, and two ends of each winding coil are respectively connected with the grooves on the first magnetic circuit core and the second magnetic circuit core and are guided to one side of the first magnetic circuit core through electrode plates; the connection part of the grooves on the first magnetic circuit magnetic core and the second magnetic circuit magnetic core and the columnar part magnetic core is provided with an inclined plane, and two ends of the winding coil climb to the grooves along the inclined plane; the magnetic shielding cover is a hollow prism, the invention can effectively reduce the electromagnetic interference of the device to the surrounding devices when in work, improve the performance of the device, and protect the winding coil from being damaged by external force.

Description

A vertical shielded pulse transformer

technical field

The invention relates to the technical field of electronic components, in particular to a vertical shielded pulse transformer.

Background technique

SMD pulse transformers are mainly used in communication equipment, such as: network switches, routers, servers, motherboards, network set-top boxes, smart TVs and network cameras, etc., mainly for signal coupling, impedance matching and high voltage isolation.

In the preparation process of the existing micro-miniature pulse transformer, the coil will pass through relatively sharp edges and corners during the process of winding the magnetic core of the columnar part. Due to the size limit of the micro-pulse transformer, the coils used in the preparation process mostly have a wire diameter of 40-80 microns, and the wire diameter of 40-80 microns and the thin insulating varnish layer also make the coil pass through during the winding process. Sharp edges and corners are susceptible to greater damage, including damage to the insulating paint or the breakage of the coil itself, causing the coil to lose its original function, causing the coil winding to short-circuit and the withstand voltage between the primary coil and the secondary coil to drop significantly, eventually resulting in The electrical function of the pulse transformer has failed. Secondly, in the mounting process of micro-pulse transformers, it is inconvenient to observe the welding condition of the electrode on the welding surface of the device with the traditional coated electrode, and it is easy to desolder and weld, and it is inconvenient to directly test the welding condition of the device after welding. In addition, when the device is working, part of the magnetic field induced in the winding is bound in the magnetic core. The way to complete the magnetic circuit of the existing micro-pulse transformer is only to glue a piece with the magnetic core body on the side away from the electrode. A cover with the same magnetic properties. There are still many magnetic flux leakages that cause certain electromagnetic interference to external circuits and components.

Although some manufacturers have realized the automatic production of micro-pulse transformers, in the actual production process, due to the geometric characteristics of the device and the limitations of automatic production equipment, the reliability of the winding coil and the electrical performance of the final product cannot be effectively guaranteed. , resulting in a lower pass rate and poor reliability of the product, which ultimately further increases the production cost.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides a vertical shielded pulse transformer, which can effectively reduce the degradation of device performance caused by magnetic flux leakage and ensure effective welding of the device during mounting.

The present invention is achieved through the following technical solutions:

A vertical shielded pulse transformer, comprising a winding magnetic core body and a magnetic shielding cover fixedly sleeved outside it;

The wound magnetic core body includes a cylindrical magnetic core for winding a coil, and a first magnetic circuit core and a second magnetic circuit core arranged at both ends thereof, the first magnetic circuit core and the second magnetic circuit magnetic core There are multiple electrode slots on the core, and electrodes are set in the electrode slots, and the electrodes are connected to the outgoing wires of the winding coils. There are guide slots on the outer wall of the magnetic shielding cover, which are used to guide the ends of the electrodes to the mounting surface of the pulse transformer. .

Preferably, the side walls of the first magnetic circuit core and the second magnetic circuit core are higher than the side walls of the cylindrical magnetic core, the side of the electrode groove close to the cylindrical magnetic core is an inclined plane, and the lower end of the inclined plane is in contact with the cylindrical magnetic core. The surface of the core is flat, and the outgoing wire of the winding coil is laid along the slope and connected with the electrode.

Preferably, the corners of the cylindrical magnetic core are rounded or straight chamfered.

Preferably, the cross-sectional area of the cylindrical magnetic core is 1-4 mm ² .

Preferably, four winding coils are wound on the cylindrical magnetic core;

The four winding coils are wound in two layers, the winding directions of the two winding coils of the same layer are the same and are wound at intervals, and the winding directions of the upper and lower layers are opposite.

Preferably, the mount surface is an end surface of the magnetic shield.

Preferably, the guide groove is a groove provided on the surface of the magnetic shield, the electrode sheet is laid in the groove, one end of the electrode sheet is fixedly connected to the electrode groove, and the other end is located in the groove on the mounting surface.

Preferably, the magnetic shield is a rectangular hollow tube with two ends open.

Preferably, both the magnetic shield and the magnetic core body are ferrite materials.

Preferably, the axial section of the wound magnetic core body is I-shaped.

Compared with the prior art, the present invention has the following beneficial technical effects:

A vertical shielded pulse transformer provided by the present invention includes a wire-wound core body and a magnetic shield sheathed on it. The magnetic shield of the hollow magnetic tube is used to replace the existing magnetic cover to increase the The ability to capture the magnetic field generated by the coil when the device is working can improve the actual performance of the device, and can also reduce the influence of the electromagnetic field generated by the device on the surrounding devices. And the fully enclosed magnetic core shield has a certain rigidity, which can protect the internal coil from being squeezed by external force or damaged by foreign objects during transportation or actual use, effectively improving the reliability of the device in actual use. Second, considering the problems of traditional electroplating electrodes in the actual use process, electrode sheets are used to replace traditional electroplating electrodes. Compared with the traditional electroplating electrodes, the electrode sheet itself is partly exposed on the side, so this part of the electrode sheet can be used directly to test the working conditions of each winding, without the need to set up additional test parts on the soldered circuit board, which reduces the difficulty of design and production costs. At the same time, the design of the electrode sheet itself is more conducive to subsequent placement, because compared with traditional coated electrodes, the electrode sheet can better absorb and guide soldering materials such as solder, and it is not easy to cause false soldering and desoldering, which can well ensure that the device Reliability in actual use.

Description of drawings

Fig. 1 is a top perspective structural diagram of a shielded pulse transformer of the present invention;

Fig. 2 is a schematic diagram of a magnetic shield of the present invention;

Fig. 3 is a schematic diagram of the body of the wound magnetic core of the present invention;

Fig. 4 is a cross-sectional view of a columnar magnetic core of the present invention;

Fig. 5 is the structural diagram of the pulse transformer of the present invention;

Fig. 6 is the sectional view of the wound coil of the present invention;

Fig. 7 is the electrical connection diagram of a kind of pulse transformer of the present invention;

Fig. 8 is a perspective view of a pulse transformer of the present invention.

In the figure, 1-magnetic shield, 2-first magnetic circuit core, 3-column core, 4-second magnetic circuit core, P1-first electrode, P2-second electrode, P3-third electrode , P4-fourth electrode, P5-fifth electrode, P6-sixth electrode, P7-seventh electrode, w1-first winding coil, w2-second winding coil, w3-third winding coil, w4-fourth Winding coil, G1-first groove, G2-second groove, G3-third groove, G4-fourth groove, G5-fifth groove, G6-sixth groove, G7-seventh groove Groove, G8-eighth groove, Y1-first guide groove, Y2-second guide groove, Y3-third guide groove, Y4-fourth guide groove, Y5-fifth guide groove, Y6-sixth guide groove , Y7-the seventh guide groove, Y8-the eighth guide groove, 5-bevel, 6-rounded corner.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings, which are explanations rather than limitations of the present invention.

As shown in Figures 1-3, a vertical shielded pulse transformer includes a wound magnetic core body and a magnetic shield 1 fixedly sleeved outside it.

The wound magnetic core body includes a cylindrical magnetic core 3 for winding a coil, and a first magnetic circuit core 2 and a second magnetic circuit core 4 arranged at its two ends, and the first magnetic circuit core 2 and the Electrodes are arranged on the second magnetic circuit core 4 , four winding coils are wound on the columnar magnetic core 3 , and the winding coils are connected to the electrodes.

The two ends of the columnar magnetic core 3 are connected with the first magnetic circuit magnetic core 2 and the second magnetic circuit magnetic core 4 by welding, and form an I-shaped structure, the adjacent two side walls of the cylindrical magnetic core 3 The connection is designed with rounded corners to reduce the wear of the coil during the winding process. The winding window is shown in Figure 4. The shape is a rectangular window with rounded corners, and the radius of the rounded corners is 0.03-0.2mm. This ensures that the mold is easy to install, and at the same time, it can also ensure that the coil will not pass through sharp edges and corners during the winding process to protect the coil insulation layer and improve the reliability of the final coil product.

Referring to Fig. 2, two electrode grooves are respectively arranged on the parallel sides of the first magnetic circuit magnetic core 2 and the second magnetic circuit magnetic core 4, and the two electrode grooves are arranged at intervals, and the side of the electrode groove near the cylindrical magnetic core 3 is provided with Inclined surface, the lower end of the inclined surface is flush with the side wall of the cylindrical magnetic core 3. The winding coil can be wound on the cylindrical part of the magnetic core 3 and then laid along the slope to the electrode slot to connect with the motor. The electrode slot is set at the electrode position to facilitate subsequent welding At the same time, the electrolytic tanks are arranged at intervals, and the protrusions between the two electrolytic tanks can also play the role of isolating each electrode, which improves the insulation characteristics of the electrode position device; secondly, by setting the slope to reduce the winding of the coil on the cylindrical magnetic core The suspension of the coil when it is connected to the groove after manufacturing reduces the space where the coil can deform when it is subjected to an external force, thereby improving the reliability of the winding and achieving the purpose of enhancing the reliability of the device.

The magnetic shield 1 is a magnetic tube with openings at both ends, its cross section is a rectangular ring, and its material is ferrite material, which is mainly used to close the magnetic circuit, improve the electrical performance of the finished device, and protect the coil from being damaged by external force. And limit the influence of the electromagnetic field generated by the device on the surrounding devices. The body of the wound magnetic core is an I-shaped magnetic core as a whole, and its material is consistent with the magnetic shield 1, and it is bonded together with the magnetic shield by a magnetic adhesive. The thickness of this part of the adhesive in the finished product is preferably 50-80 Micron.

The outer wall of the magnetic shield 1 is provided with guide grooves, the electrodes are arranged in the guide grooves, and the guide grooves are used to guide the electrodes of the first magnetic circuit core 2 and the second magnetic circuit core 4 and guide the electrodes to the mounting The mounting surface is located at the end surface of any end of the magnetic shield 1 .

Referring to Figures 5 and 6, when coils are wound on the cylindrical part of the magnetic core, the four wound coils are wound up and down in layers, and the directions of the upper and lower layers of coils are reversed. The purpose of this is to ensure that the upper and lower layers of coils are After the core side of the second magnetic circuit is connected, the magnetic fields induced by the two parts of the coil are superimposed instead of canceling each other, and at the same time, it is ensured that the coils will not be wound in the same direction at the beginning and end of winding. This purpose is to reduce subsequent automation. Functional requirements for automatic winding machines when winding coils to reduce production costs.

Correspondingly, considering the problems that occur in the actual use of traditional electroplating electrodes, such as: the welding surface is inconvenient to observe the welding condition of the electrode, it is easy to desolder and weld, and it is inconvenient to directly test the welding conditions of the device after welding. And SMT mounting requirements, so choose to use electrode sheets instead of traditional plating electrodes. Compared with the traditional electroplating electrodes, the electrode sheet itself is partly exposed on the side, so this part of the electrode sheet can be used directly to test the working conditions of each winding, without the need to set up additional test parts on the soldered circuit board, which reduces the difficulty of design and production costs. At the same time, the design of the electrode sheet itself is more conducive to subsequent placement, because compared with traditional coated electrodes, the electrode sheet can better absorb and guide soldering materials such as solder, and it is not easy to cause false soldering and desoldering, which can well ensure that the device Reliability in actual use.

In the design process of the pulse transformer, most of the existing designs ignore the consideration of the magnetic core cover, only after adding a magnetic core cover to the device, to ensure the integrity of the magnetic circuit where the induced magnetic field is located during the working process of the device. However, not all the induced magnetic fields can be captured by the magnetic core. Therefore, for the device, there is still a certain degree of magnetic flux leakage, which leads to the failure to improve the performance of the device. In the present invention, the cuboid magnetic core cover plate in the existing device is optimized as a magnetic shielding cover shaped as a hollow magnetic tube, so as to increase the ability to capture the magnetic field generated by the coil when the device is working, and improve the actual performance of the device. At the same time, it can also reduce the influence of the electromagnetic field generated by the device on the surrounding devices. And the fully enclosed magnetic core shield has a certain rigidity, which can protect the internal coil from being squeezed by external force or damaged by foreign objects during transportation or actual use, effectively improving the reliability of the device in actual use. sex.

Example 1

A vertical shielded pulse transformer, comprising a wire-wound core body and a magnetic shield 1 fixedly sheathed outside it; the wire-wound core body includes a cylindrical magnetic core 3 for winding a coil, and the Both ends are respectively fixedly connected to the first magnetic circuit core 2 and the second magnetic circuit core 4 to form an I-shaped wound core body.

As shown in Figure 2, considering the purpose of using a rectangular parallelepiped magnetic core to close the magnetic circuit in the previous transformer design and improving the effective magnetic permeability of the magnetic core, there is still a certain phenomenon of magnetic flux leakage, which will not only cause the performance of the device itself to be different from the A large difference in the design value will also cause a large electromagnetic interference to the surrounding devices when the device is working. At the same time, a single cuboid magnetic core cover also means that there will be exposed magnetic cores on both sides in the finished device. It is very likely to damage the insulating layer of the wound coil or even damage the structure of the coil, causing the electrical function of the device to be affected. Therefore, the magnetic shielding cover in this embodiment is set on the body of the wound magnetic core, which can not only improve the electrical performance of the device, reduce the electromagnetic interference to the surrounding devices, but also ensure the reliability of the coil during the use of the device, thereby ensuring normal operation of the device.

As shown in FIG. 3 , the wound core body includes a cylindrical core 3 , a first magnetic circuit core 2 and a second magnetic circuit core 4 . The first magnetic circuit core 2 and the second magnetic circuit core 4 are provided with eight grooves, the first groove G1, the second groove G2, the third groove G3, the fourth groove G4, the fifth groove The groove G5, the sixth groove G6, the seventh groove G7 and the eighth groove G8, wherein the second groove G2, the third groove G3, the sixth groove G6 and the seventh groove G7 are arranged on the first On both sides of the magnetic circuit core 2 , the first groove G1 , the fourth groove G4 , the fifth groove G5 and the eighth groove G8 are arranged on both sides of the second magnetic circuit core 4 .

It can be seen from Figure 3 that a slope 5 is provided on the side of the groove close to the cylindrical magnetic core, and the lower end of the slope 5 is flush with the side wall of the cylindrical magnetic core. Large suspended state to reduce the deformation range of the lead wire when subjected to external force, ensure the stability of the electrode connection coil when subjected to external force, and ensure the reliability of the final device when subjected to external force.

In this embodiment, there is a height difference of at least 0.2mm between the surface of the groove and the cylindrical magnetic core, which means that after the winding is completed, the outgoing wire of the winding is led from the cylindrical part of the magnetic core to the surface of the groove to complete When welding, there is a large overhang. Considering that the diameter of the wire itself is only tens of microns, this degree of suspension means that when the wire is subjected to a large external force or impacted by foreign objects, it will cause deformation that will cause the winding coil to break. A slope 5 is provided at the junction with the magnetic core of the columnar part to ensure that the deformable space of the wire is small and to improve the reliability of the coil during the manufacturing process.

As shown in Figure 3, rounded corners are made on the edges of the cylindrical part of the magnetic core 3; its function is to ensure that the original insulating varnish will not be worn away or the coil will not be damaged due to the sharp corners of the coil during the winding process Breakage occurs to ensure the reliability of the electrical performance of the device.

As shown in Figure 5, four winding coils are wound on the cylindrical part of the pulse transformer, which are the first winding w1, the second winding w2, the third winding w3, and the fourth winding w4; the outlet of the first winding w1 The first groove G1 and the second groove G2 are connected, the outlet of the second winding w2 is connected to the third groove G3 and the fourth groove G4, and the outlet of the third winding w3 is connected to the fifth groove G5 and the sixth groove In the slot G6, the outgoing wire of the fourth winding w4 is connected to the seventh slot G7 and the eighth slot G8.

As shown in Figure 5, when winding the coil, the coil is wound in the following manner, the first winding coil w1 and the second winding coil w2 are wound side by side, the third winding coil w3 and the fourth winding coil w4 are wound side by side, and at the same time The final layout is completed in two layers. Correspondingly, if it is wound in multiple layers, the number of coil turns in each layer will be different, resulting in the consistency of the primary coil and secondary coil of the final device inconsistent with the preset value, affecting The electrical function of the device. Therefore, every two groups of coils are wound side by side to ensure the consistency of the primary coil and the secondary coil, and to ensure the normal electrical function of the device.

For this embodiment, the first winding w1 and the second winding w2 are drawn out from the second groove G2 and the third groove G3 respectively, and wound on the cylindrical partial magnetic core 3 in a clockwise direction to complete the design turn After several windings, it is connected to the first groove G1 and the fourth groove G4, and then the third winding coil w3 and the fourth winding coil w4 are drawn out from the sixth groove G6 and the seventh groove G7, according to the inverse The clockwise direction (if the winding direction of the first winding coil w1 and the second winding coil w2 is counterclockwise, the winding direction of the third winding coil w3 and the fourth winding coil w4 is clockwise) in the direction of the cylindrical part of the magnetic core 3 to complete the winding of the designed number of turns, and then connect to the fifth groove G5 and the eighth groove G8. The reverse winding of the double-layer coil can ensure that the upper and lower coils are connected on the core side of the second magnetic circuit when the device is actually used, and the magnetic fields induced by the two coils are superimposed instead of canceling each other out. At the end, there will be no winding in the same direction. The purpose is to reduce the functional requirements of the automatic winding machine during the subsequent automatic winding of the coil and reduce the production cost. Of course, when winding the coil, it is also possible to first wind the third winding w3 and the fourth winding w4 on the bottom layer, or change the connection mode between the wound coil and the electrodes, and these similar designs will not be repeated here. .

As shown in Figure 2, eight guide grooves are provided on the magnetic shield 1 of the pulse transformer, namely the first guide groove Y1, the second guide groove Y2, the third guide groove Y3, the fourth guide groove Y4, the fifth guide groove The guide groove Y5, the sixth guide groove Y6, the seventh guide groove Y7 and the eighth guide groove Y8.

According to the length of the guide groove, it can be divided into short guide groove and long guide groove. The short guide groove includes the second guide groove Y2, the third guide groove Y3, the sixth guide groove Y6 and the seventh guide groove Y7. The long guide groove includes the first The guide groove Y1 , the fourth guide groove Y4 , the fifth guide groove Y5 and the eighth guide groove Y8 . The function of the short guide groove is to guide the electrodes (P2, P3, P6, P7) on the first magnetic circuit core to the mounting surface, and the function of the long guide groove is similar to that of the second magnetic circuit core. The electrodes (P1, P4, P5, P8) are guided to the mounting surface, which reduces the difficulty of mounting the device during actual use.

As shown in Figure 5, the eight electrodes are distributed on the upper and lower sides of the first magnetic circuit core and the second magnetic circuit core, which cannot be well implemented for placement and use. Therefore, in this example, electrode pads (P1, P2, P3, P4, P5, P6, P7, P8) will be used to weld ) coils are guided to the same side to facilitate post-mounting production of devices. As shown in Fig. 2, the electrode pieces (P1, P2, P3, P4, P5, P6, P7, P8) designed in the present embodiment will guide grooves (Y1, Y2, Y3, Y4, Y5) on the magnetic shield 1 , Y6, Y7, Y8) are fixed, which can not only facilitate automatic production, but also ensure that the electrode sheets will not be short-circuited during the mounting process or the distance is too close to cause short-circuiting between different windings, which will affect the actual electrical performance of the device.

A vertical shielded pulse transformer of the present invention is applied to a micro-miniature pulse transformer. During the preparation process of the micro-miniature pulse transformer, the coil will pass through relatively sharp edges and corners during the process of winding the columnar part of the magnetic core. Due to the size limitation of the micro-miniature pulse transformer, most of the coils used in the preparation process have a wire diameter of 40-80 microns. The smaller wire diameter and the thickness of the insulating layer are convenient for welding electrodes and device mounting, but the same, Its wire diameter of 40-80 microns and thin insulating varnish layer also make the coil susceptible to greater damage when it passes through sharp edges and corners during the winding process, including damage to the insulating varnish or the breakage of the coil itself, resulting in loss of the coil. The original function causes the coil winding to be short-circuited and the withstand voltage between the primary coil and the secondary coil drops significantly, which eventually leads to the failure of the electrical function of the pulse transformer.

In the mounting process of micro-miniature pulse transformers, if traditional coated electrodes are used, it is inconvenient to observe the welding status of the electrodes on the welding surface of the device, and it is easy to desolder and solder, and it is inconvenient to directly test the welding status of the device after welding. Compared with the traditional coated electrode, the electrode sheet itself is partly exposed on the side, so this part of the electrode sheet can be directly used to test the working conditions of each winding, without the need to set up additional test parts on the soldered circuit board, which reduces the difficulty of design and production costs. At the same time, the design of the electrode sheet itself is more conducive to subsequent placement, because compared with traditional coated electrodes, the electrode sheet can better absorb and guide soldering materials such as solder, and it is not easy to cause false soldering and desoldering, which can well ensure that the device Reliability in actual use.

When the device is working, the magnetic field induced in the winding is partly bound in the magnetic core, but for the previous miniature pulse transformer, the way to complete the magnetic circuit is only to glue a piece with the same magnetic core body on the side away from the electrode. Magnetic cover. There are still many magnetic flux leakages that cause certain electromagnetic interference to external circuits and components. Therefore, in the present invention, the winding direction is chosen to be perpendicular to the plane where the final electrode is located, and the magnetic cover plate used for the complete magnetic circuit is improved to a magnetic shield, which can not only ensure that the magnetic flux leakage of the device in the working state is smaller, Reduce the impact of the device on the surrounding devices under working conditions, and at the same time reduce the impact of the external electromagnetic field on the pulse transformer, and ensure the electrical performance of the device when it works normally.

The above content is only to illustrate the technical ideas of the present invention, and cannot limit the protection scope of the present invention. Any changes made on the basis of the technical solutions according to the technical ideas proposed in the present invention shall fall within the scope of the claims of the present invention. within the scope of protection.

Claims (10)

1. A vertical shielded pulse transformer, characterized in that it comprises a wound magnetic core body and a magnetic shield (1) fixedly sleeved outside it; The wound magnetic core body includes a cylindrical magnetic core (3) for winding a coil, and a first magnetic circuit core (2) and a second magnetic circuit core (4) arranged at both ends thereof, the first magnetic circuit The magnetic circuit core (2) and the second magnetic circuit magnetic core (4) are provided with a plurality of electrode grooves, electrodes are arranged in the electrode grooves, and the electrodes are connected with the outgoing wires of the winding coils, and the outer wall of the magnetic shielding cover (1) is provided with The guide groove is used to guide the end of the electrode to the mounting surface of the pulse transformer. 2. A vertical shielded pulse transformer according to claim 1, characterized in that, the side walls of the first magnetic circuit core (2) and the second magnetic circuit core (4) are higher than the columnar magnetic core. The side wall of the core (3), the side of the electrode groove close to the columnar magnetic core is an inclined plane, the lower end of the inclined plane is flush with the surface of the cylindrical magnetic core (3), and the outgoing wire of the winding coil is laid along the inclined plane and connected with the electrodes. 3 . The vertical shielded pulse transformer according to claim 1 , wherein the corners of the cylindrical magnetic core are rounded or straight chamfered. 4 . 4. A vertical shielded pulse transformer according to claim 1, characterized in that the cross-sectional area of the columnar magnetic core (3) is 1-4 mm ² . 5. A kind of vertical shielded pulse transformer according to claim 1, characterized in that, said columnar magnetic core (3) is wound with four winding coils; The four winding coils are wound in two layers, the winding directions of the two winding coils of the same layer are the same and are wound at intervals, and the winding directions of the upper and lower layers are opposite. 6 . The vertical shielded pulse transformer according to claim 5 , wherein the mount surface is an end surface of a magnetic shield. 7 . 7. A vertical shielded pulse transformer according to claim 6, characterized in that, the guide groove is a groove arranged on the surface of the magnetic shield, the electrode sheet is laid in the groove, and one end of the electrode sheet is connected to the The electrode groove is fixed, and the other end is located in the groove of the mounting surface. 8 . A vertical shielded pulse transformer according to claim 1 , wherein the magnetic shield is a rectangular hollow tube with two ends open. 9. A vertical shielded pulse transformer according to claim 8, characterized in that the magnetic shield (1) and the magnetic core body are made of ferrite. 10. A vertical shielded pulse transformer according to claim 1, characterized in that the axial section of the wound magnetic core body is I-shaped.

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