JP2727461B2 - Winding method of electric winding parts - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a winding method suitable for an electric winding component such as a choke coil and a transformer.

[Prior Art] FIG. 8 is a cross-sectional view of a choke coil shown as a conventional example. This choke coil is provided with flanges 1 on both sides of an iron core winding portion 11a.
An iron core 11 integrally formed with 1b and 11c, a coil 12 wound on an iron core winding portion 11a of the iron core 11, and terminal pins 13 and 14 having a winding start end and a winding end of the coil 12 fixed thereto. ing. The coil 12 is formed by various winding methods such as aligned winding and galvanized winding. In particular, a so-called tendency lap winding method shown in FIG. 9 is known as a winding method capable of improving withstand voltage and efficiency. Have been.

In this winding method, the first winding P ₁ is provided at the rising portion of the flange 11b,
After turning the second winding P ₂ wound thereon, turning the third winding P ₃ around the lateral position of the first winding P _1. Subsequently, after rolling the fourth winding P ₄ in the lateral position of the third winding P _3, wound in the order of P _5, P ₆ · · · ·, similarly wound around to Pn below.

At the time when the winding Pn is wound, a triangular layer having a winding cross section is formed according to a line connecting the windings P ₁ , Pk, and Pn. Winding is performed along the diagonal sides of the layer, and winding is performed with the winding pitch advanced as indicated by the dashed line 15 in the drawing.

[Problems to be Solved by the Invention] The coil 12 wound as described above has a small potential difference and distributed capacitance appearing between wires, and is advantageous in increasing the withstand voltage and efficiency of the electric winding component.

However, the above-mentioned oblique lap winding involves winding collapse and it is difficult to perform accurate winding. This is due to the fact that the winding pitch does not proceed with an accurate tendency, such as the wire rod slipping on the surface of the iron core winding portion 11a and displacing, or slipping down without riding on the lower winding.

When the winding collapse occurs, the winding of the low voltage part and the winding of the high voltage part may approach each other. In this case, the potential difference between the wires increases, causing corona discharge and dielectric breakdown.

 An object of the present invention is to solve the above problems.

"Means for Solving the Problems" In order to achieve the above-mentioned object, according to the present invention, in a winding method of an electric winding component wound between a flange of an iron core or a bobbin, a winding pitch is advanced in one direction. The winding process in which the forward winding and the return winding in which the winding pitch is wound in the other direction is wound in the same direction is sequentially repeated with the same number of turns, and each time the winding process is repeated, the winding process is performed in one direction. After forming a first winding portion by winding from one flange in a predetermined range while increasing the number of windings in a fixed number of winding units, returning winding is performed in a fixed number of winding units with respect to outward winding. The winding process of winding with decreasing the number of wires is sequentially repeated to form a second winding portion in a predetermined range between the first winding portion and the other flange, and then, forward winding and returning winding The winding process of winding the same number of turns is repeated in sequence, and each time the winding process is repeated, A third winding portion formed by winding between the second winding portion and the other flange while decreasing the number of windings in a unit of a constant number of turns toward the second winding portion. A winding method is proposed.

In addition, according to the present invention, after forming the above-described first winding portion,
The present invention proposes a winding method for forming the third winding portion and a winding method in which the second winding portion is subjected to a winding process of aligned winding or unaligned winding.

"Example" Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a simplified cross-sectional view of a choke coil in which the winding method of the present invention has been carried out.
An iron core having b and 21c, 22 is a coil formed on the iron core winding portion 21a, and 23 and 24 are terminal pins for fastening the winding start and end of the coil 22.

The coil 22 is formed by a first winding part 22a, a second winding part 22b, and a third winding part 22c wound with one wire.

FIG. 2 is an explanatory diagram showing a winding method of the coil 22.

As shown in the figure, in the first winding portion 22a, the winding is started from the lowermost portion of the inner surface of the flange 21b and wound in the direction of the flange 21c with a winding pitch of three turns (forward winding). line and the winding process a ₁ is performed by the backward three turns proceeded winding pitch in the flange 21b direction (backward winding) and, subsequently, 3 turns on the windings of the winding process a _1, A three-turn winding is wound on the iron core winding part 21a, and a six-turn winding is advanced in the winding pitch forward direction in the direction of the flange 21c, and a winding is wound on this winding in the direction of the flange 21b. winding step a ₂ is performed by the winding of 6 turns proceeded backward pitch.

In the same manner, a ₃ , a ₄ ,.
An winding process is performed. First winding portion 22a which is the winding in this way, the winding Ta _1, Tak, is formed as a triangular cross-section layer surrounded by lines connecting Tan, constant its hypotenuse portion with respect to the axial center of the core 21 Angle θ.

In the drawings, each winding step is shown in a stepwise manner for convenience of description, but in the state of actual winding, it is formed as a cross-sectional layer of a linear inclined side 22l having an angle θ. The second winding portion 22b is wound so as to advance the winding pitch along the oblique side of the triangular section layer.

That is, winding along the hypotenuse of the triangular section layer, Tan
The return winding wound up is Tb ₁ and is 3 times larger than the forward winding.
Turn less. Next, the core winding 21
In the forward path, in which the winding pitch is advanced toward “a”, the number of windings of three turns is increased in the direction of the flange 21c when reaching the core winding part 21a.
(Tb _{2 to} Tb ₃ ) Subsequently, the return winding is performed by advancing the winding pitch in the coil outer peripheral direction, and the return winding is reduced by three turns as compared with the forward winding. (Tb _{3 to} Tb ₄ ) By increasing the winding pitch in this way, the winding process
b _1, b ₂ is performed, and so on b _3, b ₄ ····· bn winding process is successively performed a second winding part 22b is formed.

Similarly to the first winding part 22a, the third winding part 22c includes winding steps c ₁ , c ₂ , which have the same number of turns in the forward path and the return path in each step.
Each time it repeats as c ₃ , c ₄ ... cn, the winding path is wound so that the forward path and the return path of the winding pitch are reduced by three turns.

However, in the third winding part 22c, the path lengths of the forward path and the return path are reduced from the flange 21c toward the flange 21b for each winding step.

The third winding portion 22c wound in this manner is formed as a winding having a triangular cross section as shown in the drawing. Although the coil 22 is wound as described above, in practice, the upper coil wire partially falls between the lower coil wires, so that each wire of the upper coil is positioned immediately above each wire of the lower coil. Not be. Therefore, although the course of the winding pitch is shown in a stepwise manner, this course is at an angle θ with respect to the axis of the iron core 21.
It becomes an inclined course with.

In the coil 22 wound in this manner, since the winding collapse hardly occurs in the first winding part 22a, the winding part 22a is formed as an accurate triangular cross-section layer.
b, winding collapse does not occur in the third winding part 22c.

In addition, in order to prevent winding slippage of the core winding part 21a, a means such as partially winding the surface of the winding part 21a into a fine uneven surface or winding a rough tape on the core winding part 21a is provided. And effective.

Further, winding collapse becomes more difficult to occur as the angle θ of the path of the winding pitch decreases, but on the other hand, as the angle θ decreases, the potential difference and the distribution capacitance appearing between the lines increase.

On the other hand, the angle θ with respect to this course is determined by the rate of increase in the number of turns in the repeated winding process. That is, in the above-described embodiment, each time the winding process of the first winding portion 22a is repeated, the reciprocating path is increased in units of three turns.
If the unit of the number of turns is selected to be small, the angle θ is increased, and if the unit is selected to be large, the angle θ is reduced.

As a result, the greater the angle θ and the steeper the path gradient of the winding pitch, the more advantageous. However, it is preferable to determine the number of turns in the above-mentioned number of turns in consideration of winding collapse.

FIG. 3 is an explanatory diagram showing the winding pitch course of the coil 22 described above. As shown in FIG. 3, the first winding portion 22a has a constant number of turns from the flange 21b toward the flange 21c for each winding process. The unit X increases, and in the second winding part 22b, the return path of each winding step decreases by the number of winding units X with respect to the outward path, and the third winding part
In 22c, the constant number of winding units X decreases from the flange 21c to the flange 21b for each winding step.

In the above embodiment, the choke coil has been described.
a is a primary coil, the second winding part 22b and the third winding part 22c are configured as secondary coils, or the coil 22 is configured as a secondary coil to be a lower layer or an upper layer of the primary winding and the primary winding is arranged. Provide a coil. Further, the above-described coil may be wound around a bobbin without being wound directly around the iron core 21.

FIG. 4 shows an example in which the present invention is applied to a transformer, which comprises two E-shaped iron cores 25a and 25b of the same shape, a bobbin 26, a coil 27, and terminal pins 28 and 29.

The coil 27 of this transformer is wound in the same manner as the coil 22 of the above-described embodiment. The first winding 27a is a primary coil, the second winding 27b, and the third winding 27c are secondary. It is a coil.

As shown in FIG. 5, the coil 27 of such a transformer may be constituted by a first winding part 27a and a third winding part 27c. FIG. 6 shows the course of the winding pitch in such a configuration.

FIG. 7 shows an embodiment of a transformer in which a second winding part 30 of aligned winding or unaligned winding is provided between a first winding part 27a and a third winding part 27c. This is the same as the embodiment shown in FIG.

Although the embodiments have been described above, the present invention can be similarly applied to an electric winding component having no iron core.

[Effects of the Invention] As described above, the winding method according to the present invention sequentially increases and decreases the number of winding steps in units of a fixed number of turns, or keeps the number of turns in the return path constant with respect to the outward path. The winding process, which is reduced by the number of windings, is sequentially repeated, so that the coil is wound obliquely with respect to the core of the iron core or bobbin. And can be wound according to the direction.
The winding angle can be adjusted by changing the winding number unit, and the electric winding component can be wound as a coil that maximizes the withstand voltage and efficiency.

[Brief description of the drawings]

FIG. 1 is a simplified cross-sectional view of a choke coil implementing the winding method of the present invention, FIG. 2 is an explanatory view showing a winding method of the choke coil, and FIG. 3 shows the course of the winding pitch. FIG. 4 is a simplified sectional view showing an embodiment of a transformer in which a coil is wound by first, second and third winding portions according to the winding method of the present invention, and FIG. 5 is a first and third winding. FIG. 6 is a simplified cross-sectional view showing an embodiment of a transformer in which a coil is wound by a wire portion. FIG. 6 is an explanatory view showing the course of the winding pitch in the embodiment of FIG.
The figure shows the fourth winding in which the second winding part is aligned winding or non-aligned winding.
FIG. 8 is a cross-sectional view of a choke coil shown as a conventional example, and FIG. 9 is an explanatory view showing a conventional winding method. 21 core 21b, 21c flange 22 coil 22a first winding part 22b second winding part 22c third winding part 25 iron core 26 bobbin 27 coil 27a first winding part 27b second winding part 27c third winding part

Claims (3)

(57) [Claims] In a method of winding an electric winding component wound between a collar of an iron core or a bobbin, a forward winding and a winding pitch are wound so that a winding pitch is advanced in one direction. The winding process in which the winding is performed with the same number of windings as the return winding is sequentially repeated, and each time the winding process is repeated, the number of windings in one direction is increased in one direction while increasing the number of windings in one direction. After forming a first winding portion by winding in a predetermined range from, the winding process of winding the return winding with respect to the forward winding by reducing the number of windings by a fixed number of turns is sequentially repeated, A second winding portion is formed in a predetermined range between the first winding portion and the other flange, and subsequently, a winding process of winding the forward winding and the backward winding with the same number of windings is sequentially repeated. The second winding is performed while decreasing the number of windings by a fixed number of turns in the other direction each time the winding process is repeated. Winding and winding method of the electrical winding component and forming a third winding portion between the parts and the other flange. 2. A method of winding an electric winding component wound between a core of an iron core or a bobbin, wherein a winding pitch is advanced in one direction and a forward winding and a winding pitch are advanced in another direction. The winding process in which the winding is performed with the same number of windings as the return winding is sequentially repeated, and each time the winding process is repeated, the number of windings in one direction is increased in one direction while increasing the number of windings in one direction. After winding in a predetermined range to form one winding portion, the one winding portion is reduced while reducing the number of windings by a fixed number of turns in the other direction each time the winding process is repeated. And forming the other winding portion by winding between the first and second flanges. 3. A method of winding an electric winding component wound between a core of an iron core or a bobbin, wherein the winding pitch is advanced in one direction and the forward winding and the winding pitch are advanced in another direction. The winding process in which the outward winding is wound with the same number of windings is sequentially repeated, and each time the winding process is repeated, the number of windings in one direction is increased in one direction while increasing the number of windings in one direction. After forming a first winding portion by winding in a predetermined range from the first winding portion, the winding process of aligned winding or unaligned winding is sequentially repeated, and a predetermined range between the first winding portion and the other flange is formed. The winding process of sequentially forming the second winding portion and winding the forward winding and the returning winding with the same number of windings is sequentially repeated, and each time the winding process is repeated, a fixed number of winding units is applied to the other. Winding between the second winding part and the other flange to form a third winding part while reducing the number of turns of Method of winding an electrical coil component, characterized in that.