A high-precision coupling voltage manufacturing method

Abstract

The application discloses a high-precision coupling voltage manufacturing method, comprising the following steps: obtaining the average thickness X of the medium between the secondary coil and the shielding coil of a printed board, the line width Y1 of the first shielding coil and the line width Y2 of the second shielding coil; substituting into the formula Z1=a*X-b*Y1-c*Y2+d to obtain the theoretical coupling voltage value Z1; setting the actual coupling voltage average Z2 and substituting into the formula Z2=a*X-b*Y1-c*Y2+d; adjusting the average thickness X of the medium between the secondary coil and the shielding coil, the line width Y1 of the first shielding layer and the line width Y2 of the second shielding layer according to the formula Z2=a*X-b*Y1-c*Y2+d. The application has the beneficial effects that the customer's requirement value of the coupling voltage of the planar transformer is quickly and accurately reached, and the defective rate of the coupling voltage is improved from 2.5% to 0.1% or below.

Description

[Technical Field]

[0001] This invention relates to the field of switching power supply technology, and in particular to a method for manufacturing a high-precision coupling voltage. [Background Technology]

[0002] With the trend towards higher frequencies and smaller sizes in switching power supplies, switching speeds have increased, and PCB (Printed Circuit Board) layouts have become more compact. However, the electromagnetic interference (EMI) generated by the switching action of semiconductor devices has become increasingly severe. When switching power supplies cannot achieve inductance compatibility (EMC), it can cause malfunctions in electromagnetically sensitive electronic loads and interfere with other electrical devices by coupling excessive EMI onto the mains side. Therefore, controlling the coupling voltage is particularly important for planar transformer PCBs.

[0003] Currently, there is no quantitative guiding formula for the common-mode voltage control of planar transformers, which increases the difficulty of controlling the common-mode voltage of planar transformers. [Summary of the Invention]

[0004] This invention discloses a method for manufacturing a high-precision coupling voltage, which more accurately meets the customer's requirements for the coupling voltage of a planar transformer from a design perspective, improves the qualification rate of the coupling voltage, and further enhances the performance of the planar transformer, thereby effectively solving the technical problems involved in the background art.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A method for fabricating a high-precision coupling voltage, characterized in that the method includes the following steps:

[0007] Step 1: Provide a printed circuit board, the printed circuit board including a first primary coil, a second primary coil, a dielectric, a first shielding coil adjacent to the first primary coil, and a second shielding coil adjacent to the second primary coil. The dielectric is sandwiched between the first primary coil and the first shielding coil and between the second primary coil and the second shielding coil. Obtain the average thickness X of the dielectric, the line width Y1 of the first shielding coil, and the line width Y2 of the second shielding coil.

[0008] Step 2: Calculate the obtained average thickness X, line width Y1, and Y2. 2，Substituting into the formula Z1=a*Xb*Y1-c*Y2+d, the theoretical coupling voltage value Z1 is obtained, where a is the dielectric thickness coefficient, ranging from 300 to 600; b is the line coefficient of the first shielding coil, ranging from 200 to 400; c is the line coefficient of the second shielding coil, ranging from 300 to 600; and d is a constant, ranging from 50 to 100.

[0009] Step 3: Set the average actual coupling voltage Z2 and substitute it into the formula Z2=a*Xb*Y1-c*Y2+d. According to the formula Z2=a*Xb*Y1-c*Y2+d, adjust the average dielectric thickness X between the secondary coil and the shielding coil, the line width Y1 of the first shielding layer, and the line width Y2 of the second shielding layer.

[0010] As a preferred improvement of the present invention, in step two, the range value of a is 496, the range value of b is 240, the range value of c is 468, and the range value of d is 82.

[0011] As a preferred improvement of the present invention, the units of the theoretical coupling voltage value Z1 and the actual average coupling voltage value Z2 are both mV.

[0012] As a preferred improvement of the present invention, the units for the average thickness and the line width are both mm.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. Quickly and accurately achieve the customer's required coupling voltage value for the planar transformer;

[0015] 2. The coupling voltage failure rate has been reduced from 2.5% to less than 0.1%. [Attached Image Description]

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0017] Figure 1 This is a schematic diagram of the high-precision coupling voltage structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the first shielding coil of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the second shielding coil of the present invention.

Detailed Implementation Methods

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0025] Please see Figure 1-3 As shown, the present invention provides a method for manufacturing a high-precision coupling voltage, characterized in that the method includes the following steps:

[0026] Step 1: Provide a printed circuit board, which includes a primary coil 1, a secondary coil 2, a dielectric 3, a first shielding coil 4 adjacent to the primary coil 1, and a second shielding coil 5 adjacent to the secondary coil 2. The dielectric 3 is sandwiched between the primary coil 1 and the first shielding coil 4, and between the secondary coil 2 and the second shielding coil 5. Obtain the average thickness X of the dielectric, the line width Y1 of the first shielding coil, and the line width Y2 of the second shielding coil.

[0027] It should be noted that the printed circuit board includes, but is not limited to, the first secondary coil 1, the second secondary coil 2, the first shielding coil 4, and the second shielding coil 5. Other secondary coils and shielding coils may also be provided, and the medium 3 is sandwiched between them.

[0028] Step 2: Calculate the obtained average thickness X, line width Y1, and Y2. 2， Substituting into the formula Z1=a*Xb*Y1-c*Y2+d, the theoretical coupling voltage value Z1 is obtained, where a is the dielectric thickness coefficient, ranging from 300 to 600; b is the line coefficient of the first shielding coil, ranging from 200 to 400; c is the line coefficient of the second shielding coil, ranging from 300 to 600; and d is a constant, ranging from 50 to 100.

[0029] It should be further noted that the units for the average thickness and line width are both mm, the unit for the theoretical coupling voltage Z1 is mV, the range of a is 496, the range of b is 240, the range of c is 468, and the range of d is 82.

[0030] Step 3: Set the average actual coupling voltage Z2 and substitute it into the formula Z2=a*Xb*Y1-c*Y2+d. According to the formula Z2=a*Xb*Y1-c*Y2+d, adjust the average dielectric thickness X between the secondary coil and the shielding coil, the line width Y1 of the first shielding layer, and the line width Y2 of the second shielding layer.

[0031] It should be further noted that the unit of the actual average coupling voltage Z2 is mV.

[0032] The beneficial effects of this invention are as follows:

[0033] 1. Quickly and accurately achieve the customer's required coupling voltage value for the planar transformer;

[0034] 2. The coupling voltage failure rate has been reduced from 2.5% to less than 0.1%.

[0035] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. Other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for fabricating a high-precision coupling voltage, characterized in that, The production method includes the following steps: Step 1: Provide a printed circuit board, the printed circuit board including a first primary coil, a second primary coil, a dielectric, a first shielding coil adjacent to the first primary coil, and a second shielding coil adjacent to the second primary coil. The dielectric is sandwiched between the first primary coil and the first shielding coil and between the second primary coil and the second shielding coil. Obtain the average thickness X of the dielectric, the line width Y1 of the first shielding coil, and the line width Y2 of the second shielding coil. Step 2: Calculate the average thickness X of the medium, the line width Y1 of the first shielding coil, and the line width Y of the second shielding coil. 2， Substituting into the formula Z1=a*Xb*Y1-c*Y2+d, we obtain the theoretical coupling voltage value Z1, where a is the dielectric thickness coefficient, ranging from 300 to 600; b is the line coefficient of the first shielding coil, ranging from 200 to 400; c is the line coefficient of the second shielding coil, ranging from 300 to 600; and d is a constant, ranging from 50 to 100. Step 3: Set the average actual coupling voltage Z2 and substitute it into the formula Z2=a*Xb*Y1-c*Y2+d. Based on the formula Z2=a*Xb*Y1-c*Y2+d, adjust the average dielectric thickness X between the secondary coil and the shielding coil, the line width Y1 of the first shielding coil, and the line width Y2 of the second shielding coil.

2. The method for manufacturing a high-precision coupling voltage according to claim 1, characterized in that: In step two, the range of value for a is 496, the range of value for b is 240, the range of value for c is 468, and the range of value for d is 82.

3. A method for manufacturing a high-precision coupling voltage according to claim 1 or 2, characterized in that: The units of the theoretical coupling voltage Z1 and the actual average coupling voltage Z2 are both mV.

4. The method for manufacturing a high-precision coupling voltage according to claim 3, characterized in that: The units for the average thickness X, the line width Y1 of the first shielding coil, and the line width Y2 of the second shielding coil are all mm.

5. The method for manufacturing a high-precision coupling voltage according to claim 2, characterized in that: The theoretical coupling voltage Z1 and the actual average coupling voltage Z2 are both in mV, and the average thickness X, the line width Y1 of the first shielding coil, and the line width Y2 of the second shielding coil are all in mm.

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