CN111834102A - Pin type high-power pulse transformer and preparation method thereof - Google Patents

Pin type high-power pulse transformer and preparation method thereof Download PDF

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Publication number
CN111834102A
CN111834102A CN202010858616.8A CN202010858616A CN111834102A CN 111834102 A CN111834102 A CN 111834102A CN 202010858616 A CN202010858616 A CN 202010858616A CN 111834102 A CN111834102 A CN 111834102A
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China
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enameled wire
temperature
magnetic ring
resistant insulating
winding
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肖松
戴正立
李青
王勇
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Guiyang Sunlord Xunda Electronic Component Co ltd
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Guiyang Sunlord Xunda Electronic Component Co ltd
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Priority to CN202010858616.8A priority Critical patent/CN111834102A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2895—Windings disposed upon ring cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/323—Insulation between winding turns, between winding layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/327—Encapsulating or impregnating
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • H01F2027/065—Mounting on printed circuit boards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H01F2027/297—Terminals; Tapping arrangements for signal inductances with pin-like terminal to be inserted in hole of printed path

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Insulating Of Coils (AREA)

Abstract

The invention discloses a pin type high-power pulse transformer and a preparation method thereof, comprising a magnetic ring, an enameled wire and an inner layer high-temperature-resistant insulating adhesive tape, the enameled wire adopts three-layer insulated wire, including primary enameled wire and secondary enameled wire, plastic base one end opening, plastic base opening one end is provided with the PIN needle, the outer surface winding inlayer high temperature resistant insulating tape of magnetic ring, primary enameled wire winding is outside inlayer high temperature resistant insulating tape, the outer winding of middle level high temperature resistant insulating tape is outside the primary enameled wire of middle level high temperature resistant insulating tape, secondary enameled wire winding is outside the middle level high temperature resistant insulating tape, outer high temperature resistant insulating tape winding is outside the secondary enameled wire, the magnetic ring after the enameled wire winding constitutes the magnetic ring solenoid, the magnetic ring solenoid adopts epoxy to cover full embedment fixedly in arranging in the plastic base, the end of a thread free end electric connection of enameled wire is to the PIN needle. The invention realizes high voltage resistance and high insulating property, and the final product can reach 20000V high voltage.

Description

Pin type high-power pulse transformer and preparation method thereof
Technical Field
The invention relates to a pin type high-power pulse transformer and a preparation method thereof, belonging to the technical field of pulse transformers.
Background
With the increasing development of research personnel in China, the continuous improvement and progress of research technology, and with the continuous innovation of electronic technology, the reliability requirement of electronic products is higher and higher, the miniaturization of structures and the superiority of performance become the trend of manufacturing industry, and the microwave magnetic device is required to be developed towards the direction of short, small, light, thin, high electrical performance and high reliability. At present, new requirements of the pulse transformer are provided according to the application field of the pulse transformer and users, the pulse transformer is large in size, heavy in weight, free of a reinforcing scheme, complex in structure, inconvenient to mount, low in temperature resistance level and insufficient in high-voltage resistance, and the requirements of the market on high reliability of the pulse transformer cannot be met.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the pin type high-power pulse transformer and the preparation method thereof are provided to solve the technical problems in the prior art.
The technical scheme adopted by the invention is as follows: a pin type high-power pulse transformer comprises a magnetic ring, an enameled wire and an inner-layer high-temperature-resistant insulating adhesive tape, the enameled wire adopts three-layer insulated wire, including primary enameled wire and secondary enameled wire, plastic base one end opening, plastic base opening one end is provided with the PIN needle, the outer surface winding inlayer high temperature resistant insulating tape of magnetic ring, primary enameled wire winding is outside inlayer high temperature resistant insulating tape, the outer winding of middle level high temperature resistant insulating tape is outside the primary enameled wire of inlayer high temperature resistant insulating tape, secondary enameled wire winding is outside the middle level high temperature resistant insulating tape, outer high temperature resistant insulating tape winding is outside the secondary enameled wire, the magnetic ring after the enameled wire winding constitutes the magnetic ring solenoid of transformer semi-manufactured goods, the magnetic ring solenoid is arranged in the plastic base and is adopted epoxy to cover full embedment fixedly, the end of a thread free end electricity of enameled wire is connected to PIN needle.
Preferably, the inner-layer high-temperature-resistant insulating adhesive tape and the outer-layer high-temperature-resistant insulating adhesive tape are wound by two layers, the middle-layer high-temperature-resistant insulating adhesive tape is wound by four layers, and the outer layer between every two adjacent layers is wound by the inner layer after being wound by the outer layer to press the gap position of the inner layer to be wound.
Preferably, the magnetic ring is a circular magnetic ring.
Preferably, the magnetic ring is provided with an air gap.
Preferably, the middle part is provided with the erection column in the above-mentioned plastic base, and the erection column is provided with the step through-hole.
Preferably, the two sides of the opening end of the plastic base are provided with extension sections, and the corners are provided with grooves.
Preferably, the plastic base is provided with a U-shaped groove at the PIN position, and the U-shaped groove is opened towards the inner side of the plastic base.
Preferably, the plastic base at the PIN needle is provided with a step, the step is 3.5-4.5mm in thickness, and the step is 10-14mm in height.
Preferably, the wall thickness of the plastic base is more than 1 mm.
A method for preparing a pin type high-power pulse transformer comprises the following steps:
(1) wrapping an inner-layer high-temperature-resistant insulating adhesive tape on a magnetic ring: winding is started from the position of the adhesive tape on the left side of the air gap, winding is started in the anticlockwise direction and is wound to the air gap, then winding is started in the clockwise direction, and the head and the tail of the wire are arranged on the left side;
(2) winding a primary enameled wire of three layers of insulated wires outside an inner-layer high-temperature-resistant insulated rubber belt, wherein the enameled wire is threaded by using a crochet hook, a magnetic ring is fixed on a clamp, and the crochet hook penetrates through the magnetic ring to thread back and forth in a clockwise direction;
(3) soaking the enameled wire magnetic ring prepared in the step (2) in varnish for the first time, and placing the enameled wire magnetic ring on dust-free paper for 5 minutes; soaking the paper in the varnish for the second time, placing the paper on the dust-free paper for 5 minutes, and soaking the paper in the varnish for the third time; baking for the first time at the baking temperature of 130 ℃ for 3 hours; soaking the paper in the varnish for 5 minutes for the fourth time, and soaking the paper in the varnish for 5 minutes for the fifth time; baking for the second time at the baking temperature of 130 ℃ for 3 hours;
(5) winding the primary enameled wire by using a middle-layer high-temperature-resistant insulating adhesive tape, winding the secondary enameled wire on the middle-layer high-temperature-resistant insulating adhesive tape, winding the outer-layer high-temperature-resistant insulating adhesive tape outside the secondary enameled wire, winding the secondary enameled wire clockwise from the right side of the air gap, and winding to 2/3 to obtain a finished enameled wire magnetic ring;
(6) soaking the finished enameled wire magnetic ring prepared in the step (5) in varnish for the first time, and placing the enameled wire magnetic ring on dust-free paper for 5 minutes; soaking the paper in the varnish for the second time, placing the paper on the dust-free paper for 5 minutes, and soaking the paper in the varnish for the third time; baking for the first time at the baking temperature of 130 ℃ for 3 hours; soaking the paper in the varnish for 5 minutes for the fourth time, and soaking the paper in the varnish for 5 minutes for the fifth time; and (5) baking for the second time at the baking temperature of 130 ℃ for 3 hours.
The invention has the beneficial effects that: compared with the prior art, the invention has the following effects:
(1) according to the invention, an enameled wire material is selected as a three-layer insulated wire, the three-layer insulated wire is 8000V high-voltage resistant, high-voltage resistance is enhanced by arranging a multi-layer high-temperature resistant insulated adhesive tape (an inner layer, a middle layer and an outer layer high-temperature resistant insulated adhesive tape winding structure), and after the enameled wire is wound, the high-voltage resistant insulating property is enhanced by soaking varnish for many times, so that the final product can reach 20000V high voltage;
(2) the winding mode of the inner high-temperature-resistant insulating adhesive tape, the outer high-temperature-resistant insulating adhesive tape and the middle high-temperature-resistant insulating adhesive tape comprises the following steps: after the outer layer between the two adjacent layers is wound, the outer layer presses the gap position of the inner layer to wind, so that the transformer is enhanced in high-voltage resistance;
(3) although the square magnetic ring can also meet the use requirement, the square magnetic ring can interfere the transformer by using a magnet in the actual use process, the square magnetic ring is arranged around the base, the contact area is larger, the interference is stronger, the radiation resistance is considered, in the actual simulation test, the waveform of the square magnetic ring is distorted, the rising edge and the falling edge are larger, the waveform of the circular magnetic ring is smoother, the distortion phenomenon is avoided, the rising edge and the falling edge are better than the circular magnetic ring, so that the circular magnetic ring is selected, the contact area of the circular magnetic ring from the edge of the base is smaller, and the anti-interference capability and the radiation resistance are stronger;
(4) in order to solve the problem, an air gap can be formed on the magnetic ring by 0.1mm to prevent saturation;
(5) because the large-power pulse transformer is large in whole volume, under the complex environments of application environment after actual assembly, high-strength vibration, impact and the like, the middle part in the plastic base is provided with the mounting column, the mounting column is provided with the step through hole, the large-power pulse transformer is fixed on the circuit board after the screw penetrates through the step through hole, stable connection is realized, the connection stability is better, and the step structure prevents the outer end of the screw from protruding out of the plastic base;
(6) the extension section and the groove are arranged, so that the rearmost part is tightly attached to the extension section or flows into the groove in the glue pouring process, the contact area between the glue and the plastic base is increased, and the glue pouring adhesive force is improved;
(7) the step structure is arranged, so that the problem of installation reliability is considered, and particularly, a step thickening mode is designed at the position of the PIN PIN, so that the inserting stability and reliability of the contact PIN can be improved;
(8) the inner side of each pin position at the step of the plastic base 4 is provided with a U-shaped groove 12 for clamping a wire, so that the wire end can be conveniently clamped, the main functions are to prevent the short circuit risk caused by the connection of the wires between two pins connected beside the wire, and to clamp the wire into the wire groove, so that the wire is more attractive and is not messy;
(9) in order to guarantee that the shell does not warp, the wall thickness of the plastic base 4 is more than 1mm, and the reason is as follows: this product design structure is square structure, considers the product adaptability under different ambient temperature, for example high temperature application environment, low temperature application environment, considers receiving ambient temperature change, and expend with heat and contract with cold, because the volume is great, considers the reliability.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic bottom view of the present invention;
fig. 3 is a schematic sectional structure view of the magnetic ring.
Detailed Description
The invention is further described with reference to the accompanying drawings and specific embodiments.
Example 1: as shown in fig. 1-3, a PIN-type high-power pulse transformer comprises a magnetic ring 1, an enameled wire 2, an inner high-temperature-resistant insulating tape 3, a plastic base 4, a middle high-temperature-resistant insulating tape 6 and an outer high-temperature-resistant insulating tape 7, wherein the enameled wire 2 is a three-layer insulating wire comprising a primary enameled wire and a secondary enameled wire, one end of the plastic base 4 is open, a PIN 5 is arranged at one open end of the plastic base 4, the inner high-temperature-resistant insulating tape 3 is wound on the outer surface of the magnetic ring 1, the primary enameled wire is wound outside the inner high-temperature-resistant insulating tape 3, the middle high-temperature-resistant insulating tape 6 is wound outside the primary enameled wire, the secondary enameled wire is wound outside the middle high-temperature-resistant insulating tape 6, the outer high-temperature-resistant insulating tape 7 is wound outside the secondary enameled wire, the magnetic ring 1 wound by the enameled wire 2 forms a, the free end of the wire end of the enameled wire 2 is electrically connected to the PIN needle 5.
Preferably, the inner high-temperature-resistant insulating adhesive tape 3 and the outer high-temperature-resistant insulating adhesive tape 7 are wound by two layers, the middle high-temperature-resistant insulating adhesive tape 6 is wound by four layers, and the outer layer between the two adjacent layers is wound by pressing the gap position of the inner layer by the outer layer after the outer layer is wound.
Preferably, the magnetic ring 1 is a circular magnetic ring, the magnetic ring 1 is provided with an air gap 8, and the high-power pulse transformer mainly has the functions of 3: 1 transformation, output signal driving thyristor, radiation resistance and instantaneous high voltage resistance. The high-power transformer is mainly a thyristor, is a four-layer structure (PNPN) high-power semiconductor device, is also called as a controllable rectifier or a controllable silicon element, and has three leading-out electrodes, namely an anode (A), a cathode (K) and a gate level (G). During design, according to two modes of converting 24V into 8V or converting 12V into 3V in practical application, the voltage transformation ratio of the high-power pulse transformer is designed to be 3: in the aspect of material selection, because a high-power pulse signal is used for driving, and the requirements of radiation resistance and interference resistance are met, a ferrite power material is selected, the square magnetic ring can also meet the use requirement, but a magnet is used for carrying out an interference test on a transformer in the actual use process, the square magnetic ring is arranged around the base, the contact area is larger, the interference is stronger, the radiation resistance is considered, in the actual simulation test, the waveform of the square magnetic ring is distorted, the rising edge and the falling edge are larger, the waveform of the circular magnetic ring is smoother, the distortion phenomenon is avoided, the rising edge and the falling edge are better than the shape magnetic ring, and the circular magnetic ring is selected, the contact area of the circular magnetic ring from the edge of the base is smaller, so the interference resistance and the radiation resistance are. In addition, large current can be generated in practical application, the magnetic ring can be saturated to influence the normal work of a product, and in order to solve the problem, an air gap can be formed on the magnetic ring by 0.1mm to prevent saturation.
Because this high-power pulse transformer is whole bulky, under considering application environment after the actual assembly, high strength vibration, impact etc. complex environment, the middle part is provided with erection column 9 in plastic base 4, and erection column 9 is provided with the step through-hole, passes the screw and fixes high-power pulse transformer to the circuit board after the step hole, realizes the stable connection, and it is better to connect the steadiness, and the stair structure avoids the outstanding plastic base in screw outer end.
Preferably, 4 open end both sides of above-mentioned plastic base are provided with extension 10, and the corner is provided with recess 11, and the extension is hugged closely or flows in the recess to the last part of the encapsulating in-process of being convenient for, increases the area of contact of encapsulating and plastic base, improves encapsulating adhesive force.
Preferably, the plastic base 4 at the PIN 5 is provided with a step 13, the step has a thickness of 3.5-4.5mm and a height of 10-14mm, and occupies the height of the whole plastic base 1/3, and the structure is designed in consideration of the installation reliability problem, particularly, a step thickening mode is designed at the PIN position, so that the plugging stability and reliability of the contact PIN can be improved.
Preferably, above-mentioned plastic base 4 sets up PIN needle 5 department and sets up U type groove 12, and U type groove 12 is towards the inboard opening of plastic base 4, and the inboard design in every piece foot position of step department of plastic base 4 has the U type groove 12 of card line, conveniently advances the end of a thread card like this, and the primary function prevents that the next door links to each other between two PINs that the line links to each other and leads to the fact the short circuit risk together, secondly the line card wire inlet groove, and is more pleasing to the eye, and is not in disorder.
In order to ensure that the shell does not deform, the wall thickness of the plastic base 4 is more than 1mm, and the reason is as follows: this product design structure is square structure, considers the product adaptability under different ambient temperature, for example high temperature application environment, low temperature application environment, considers receiving ambient temperature change, and expend with heat and contract with cold, because the volume is great, considers the reliability.
Example 2: a method for preparing a pin type high-power pulse transformer comprises the following steps:
(1) wrapping an inner-layer high-temperature-resistant insulating adhesive tape on a magnetic ring: winding from the position of the adhesive tape wrapping the left side of the air gap, starting to wind in the anticlockwise direction, winding to the air gap, then winding back clockwise, arranging the head and the tail of the wire on the left side, and wrapping the magnetic ring with a thick high-temperature adhesive tape by wrapping the magnetic ring with a high-temperature insulating adhesive tape to enhance the strong voltage resistance;
(2) winding a primary enameled wire of three layers of insulated wires outside an inner-layer high-temperature-resistant insulated rubber belt, wherein the enameled wire is threaded by using a crochet hook, a magnetic ring is fixed on a clamp, and the crochet hook penetrates through the magnetic ring to thread back and forth in a clockwise direction;
(3) soaking the enameled wire magnetic ring prepared in the step (2) in varnish for the first time, and placing the enameled wire magnetic ring on dust-free paper for 5 minutes; soaking the paper in the varnish for the second time, placing the paper on the dust-free paper for 5 minutes, and soaking the paper in the varnish for the third time; baking for the first time at the baking temperature of 130 ℃ for 3 hours; soaking the paper in the varnish for 5 minutes for the fourth time, and soaking the paper in the varnish for 5 minutes for the fifth time; baking for the second time at the baking temperature of 130 ℃ for 3 hours;
(5) winding the primary enameled wire by using a middle-layer high-temperature-resistant insulating adhesive tape, winding the secondary enameled wire on the middle-layer high-temperature-resistant insulating adhesive tape, winding the outer-layer high-temperature-resistant insulating adhesive tape outside the secondary enameled wire, winding the secondary enameled wire clockwise from the right side of the air gap, and winding to 2/3 to obtain a finished enameled wire magnetic ring;
(6) soaking the finished enameled wire magnetic ring prepared in the step (5) in varnish for the first time, and placing the enameled wire magnetic ring on dust-free paper for 5 minutes; soaking the paper in the varnish for the second time, placing the paper on the dust-free paper for 5 minutes, and soaking the paper in the varnish for the third time; baking for the first time at the baking temperature of 130 ℃ for 3 hours; soaking the paper in the varnish for 5 minutes for the fourth time, and soaking the paper in the varnish for 5 minutes for the fifth time; and (5) baking for the second time at the baking temperature of 130 ℃ for 3 hours.
The invention selects the enameled wire material as a three-layer insulated wire, the three-layer insulated wire has 8000V high-voltage resistance, the high-voltage resistance is enhanced by arranging the multilayer-structure high-temperature-resistant insulated adhesive tapes (the inner layer, the middle layer and the outer layer high-temperature-resistant insulated adhesive tape winding structure), the high-voltage-resistant insulating property is enhanced by soaking varnish water for many times after the wire wrapping is finished, and the final product can reach 20000V high voltage.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and therefore, the scope of the present invention should be determined by the scope of the claims.

Claims (10)

1. A pin type high-power pulse transformer is characterized in that: the transformer comprises a magnetic ring (1), an enameled wire (2), an inner-layer high-temperature-resistant insulating tape (3), a plastic base (4), a middle-layer high-temperature-resistant insulating tape (6) and an outer-layer high-temperature-resistant insulating tape (7), wherein the enameled wire (2) adopts three layers of insulating wires and comprises a primary enameled wire and a secondary enameled wire, one end of the plastic base (4) is open, a PIN needle (5) is arranged at one open end of the plastic base (4), the inner-layer high-temperature-resistant insulating tape (3) is wound on the outer surface of the magnetic ring (1), the primary enameled wire is wound outside the inner-layer high-temperature-resistant insulating tape (3), the middle-layer high-temperature-resistant insulating tape (6) is wound outside the primary enameled wire, the secondary enameled wire is wound outside the middle-layer high-temperature-resistant insulating tape (6), the outer-layer high-temperature-resistant insulating tape (7, the magnetic ring coil is arranged in the plastic base (4) and is covered by epoxy resin and is fixed in a full encapsulation mode, and the free end of the wire end of the enameled wire (2) is electrically connected to the PIN needle (5).
2. The pin-type high-power pulse transformer according to claim 1, wherein: the inner high-temperature-resistant insulating adhesive tape (3) and the outer high-temperature-resistant insulating adhesive tape (7) are wound by two layers, the middle high-temperature-resistant insulating adhesive tape (6) is wound by four layers, and the outer layer between the two adjacent layers is wound by pressing the gap position of the inner layer by the outer layer after the outer layer is wound.
3. The pin-type high-power pulse transformer according to claim 1, wherein: the magnetic ring (1) is a circular magnetic ring.
4. The pin-type high-power pulse transformer according to claim 1, wherein: the magnetic ring (1) is provided with an air gap (8).
5. The pin-type high-power pulse transformer according to claim 1, wherein: the middle part in the plastic base (4) is provided with a mounting column (9), and the mounting column (9) is provided with a step through hole.
6. The pin-type high-power pulse transformer according to claim 1, wherein: extension sections (10) are arranged on two sides of the opening end of the plastic base (4), and grooves (11) are formed in the corners of the extension sections.
7. The pin-type high-power pulse transformer according to claim 1, wherein: the plastic base (4) is provided with a U-shaped groove (12) at the position where the PIN needle (5) is arranged, and the U-shaped groove (12) is opened towards the inner side of the plastic base (4).
8. The pin-type high-power pulse transformer according to claim 1, wherein: the plastic base (4) at the PIN needle (5) is provided with a step (13), the thickness of the step is 3.5-4.5mm, and the height of the step is 10-14 mm.
9. The pin-type high-power pulse transformer according to claim 1, wherein: the wall thickness of the plastic base (4) is more than 1 mm.
10. The method for preparing the pin-type high-power pulse transformer according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
(1) wrapping an inner-layer high-temperature-resistant insulating adhesive tape on a magnetic ring: winding is started from the position of the adhesive tape on the left side of the air gap, winding is started in the anticlockwise direction and is wound to the air gap, then winding is started in the clockwise direction, and the head and the tail of the wire are arranged on the left side;
(2) winding a primary enameled wire of three layers of insulated wires outside an inner-layer high-temperature-resistant insulated rubber belt, wherein the enameled wire is threaded by using a crochet hook, a magnetic ring is fixed on a clamp, and the crochet hook penetrates through the magnetic ring to thread back and forth in a clockwise direction;
(3) soaking the enameled wire magnetic ring prepared in the step (2) in varnish for the first time, and placing the enameled wire magnetic ring on dust-free paper for 5 minutes; soaking the paper in the varnish for the second time, placing the paper on the dust-free paper for 5 minutes, and soaking the paper in the varnish for the third time; baking for the first time at the baking temperature of 130 ℃ for 3 hours; soaking the paper in the varnish for 5 minutes for the fourth time, and soaking the paper in the varnish for 5 minutes for the fifth time; baking for the second time at the baking temperature of 130 ℃ for 3 hours;
(5) winding the primary enameled wire by using a middle-layer high-temperature-resistant insulating adhesive tape, winding the secondary enameled wire on the middle-layer high-temperature-resistant insulating adhesive tape, winding the outer-layer high-temperature-resistant insulating adhesive tape outside the secondary enameled wire, winding the secondary enameled wire clockwise from the right side of the air gap, and winding to 2/3 to obtain a finished enameled wire magnetic ring;
(6) soaking the finished enameled wire magnetic ring prepared in the step (5) in varnish for the first time, and placing the enameled wire magnetic ring on dust-free paper for 5 minutes; soaking the paper in the varnish for the second time, placing the paper on the dust-free paper for 5 minutes, and soaking the paper in the varnish for the third time; baking for the first time at the baking temperature of 130 ℃ for 3 hours; soaking the paper in the varnish for 5 minutes for the fourth time, and soaking the paper in the varnish for 5 minutes for the fifth time; and (5) baking for the second time at the baking temperature of 130 ℃ for 3 hours.
CN202010858616.8A 2020-08-24 2020-08-24 Pin type high-power pulse transformer and preparation method thereof Pending CN111834102A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113611473A (en) * 2021-08-30 2021-11-05 深圳振华富电子有限公司 Pulse transformer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113611473A (en) * 2021-08-30 2021-11-05 深圳振华富电子有限公司 Pulse transformer

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