JP2727462B2 - Electric winding parts and winding method - Google Patents

Description

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

[Prior Art] FIG. 8 is a cross-sectional view of a choke coil shown as a conventional example, and the choke coil has flanges 11 on both sides of an iron core winding 11a.
b, 11c are integrally formed, 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 oblique lap winding method shown in FIG. 9 is used as a winding method capable of increasing withstand voltage and efficiency. Are known.

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.

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 wire pitch does not advance accurately and obliquely, such as the wire rod slipping on the surface of the 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 come close to 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 a predetermined range from one flange while increasing the number of windings in units of a fixed number of turns, the return winding is wound in a fixed winding unit with respect to the forward 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 part is formed by winding between the second winding part and the other flange while decreasing the number of windings in a unit of a constant number of windings toward the third winding part.
In each of the above-mentioned winding steps, a winding method of an electric winding part is proposed, wherein winding is performed with a winding interval shorter than the wire diameter.

The present invention also proposes a winding method for forming a third winding part after forming the first winding part.

Further, in the present invention, a secondary coil is formed by the above-described first, second, and third winding portions, and a primary coil is formed by an aligned winding wound so as to be an upper layer or a lower layer of the secondary coil. We propose an electric winding part.

"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 a first winding part 22 continuously wound with an integral wire.
a, the second winding part 22b and the third winding part 22c.

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

As shown in the figure, in the first winding portion 22a, a winding (forward winding) of a 4-turn winding pitch wound from the lowermost portion of the inner surface of the flange 21b and wound in the direction of the flange 21c, and subsequently wound on the outward path. return line and 4 proceeded winding pitch in the flange 21b direction-turn winding step a ₁ is carried out by (backward winding) and,
Subsequently, four turns on the windings of the winding step a _1, the winding of 4 turns on the core winding portions 21a, the winding of the 8 turns proceeded forward winding pitch in the flange 21c directions When the winding process a ₂ is carried out is wound on the winding in the flange 21b direction by the winding of eight turns of progressive use backward winding pitch. Thereafter, each time the winding process is repeated, the winding process of a ₃ , a ₄ ... An is performed so as to increase the number of unit turns of 4 turns in the forward path and the return path. First winding portion 22a which is the winding thus to 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 step-like manner for convenience of description, but in an actually wound state, it is formed as a cross-sectional layer of a substantially 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, the winding along the hypotenuse of the triangular cross-section layer, backward winding which winding from Tan is a Tb _1, reducing 4 turns than the forward winding. Next, the forward path, in which the winding pitch is advanced from the coil outer periphery toward the core winding 21a, is turned to the flange 2 when reaching the core winding portion 21a.
Increase the number of 4-turn windings in the 1c direction. (Tb ₂ ~Tb _3).

Subsequently, this winding is advanced in winding direction in the coil outer circumferential direction to perform a return winding, and the return winding is reduced by four turns as compared with the forward winding. (Tb ₃ ~Tb _4).

By advancing the winding pitch in this way, the winding process
b _1, b ₂ is performed, and so on b _3, b ₄ second winding part 22b winding steps · · · · · bn are sequentially performed is formed.

Similarly to the first winding part 22a, the third winding part 22c includes winding steps c ₁ , c ₂ , and c in the same number of turns in the forward path and the return path in each step.
The loop is repeated as c ₃ , c _4, ... cn, but winding is performed such that the number of turns of the winding pitch is reduced by four in the forward path and the backward path in each winding step.

That is, in the third winding part 22c, the winding unit of four turns is reduced in each winding step from the flange 21c having the path length of the forward path and the return path toward the flange 21b.

The third winding portion 22c wound in this manner is formed as a winding having a triangular cross section as shown in the drawing. Figure 2 (b) shows a winding spacing S ₂ at the time of winding as described above.

That is, in this example, 1/2 of the wire diameter S _1, As a, it is then winding the distance S ₃ between the lines core as 1.5S _1. However, for the winding spacing S _2, it is preferable to determine by considering the thickness of the tilt angle θ and line 0 <a range of S ₂ <S _1. Note that X indicates a winding unit of 4 turns.

The coil 22 is wound as described above, but in practice,
Since the upper-layer coil wire partially falls between the lower-layer coil wires, the respective wires of the upper-layer coil are not positioned immediately above the respective wires of the lower-layer coil. Therefore, although the path of the winding pitch is shown in a stepwise manner, this path is an inclined path having an angle θ with respect to the axis of the iron core 21.

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 embodiment, each time the winding process of the first winding portion 22a is repeated, the reciprocating path is increased by the number of turns X of 4 turns on the reciprocating path. Becomes large, and if this unit is selected to be large, the angle θ becomes small.

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 windings in the above-mentioned winding number unit X 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 identical E-shaped iron cores 25a and 25b, 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, and 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 27a and a third winding 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. In order to repeat the winding process sequentially reduced in units of the number of turns, while maintaining a predetermined winding interval, winding is performed obliquely with respect to the axis of the iron core or bobbin, so-called oblique lap winding coil Can be wound according to the correct order and direction without winding collapse.In addition, by changing the winding number unit and adjusting the winding angle of the winding pitch, the withstand voltage and efficiency of electric winding parts can be maximized. Can be wound as a coil to enhance.

As a result, by forming a secondary coil by the above-described winding method and forming a primary coil by aligned winding, it is possible to provide an electric winding component as a transformer having high withstand voltage and high 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 (a) is an explanatory view showing a method of winding the choke coil, and FIG. FIG. 3 is an explanatory diagram showing the course of the winding pitch, and FIG. 4 is a diagram of a transformer coil-wound by the first, second, and third winding units according to the winding method of the present invention. FIG. 5 is a simplified sectional view showing an embodiment of a transformer in which a coil is wound by first and third winding portions, and FIG. 6 is a winding pitch course of the embodiment shown in FIG. FIG. 7 is an explanatory view showing FIG.
FIG. 4 is a simplified cross-sectional view of a transformer similar to the embodiment in FIG. 4 in which the winding portion is aligned or non-aligned, FIG. 8 is a cross-sectional view of a choke coil shown as a conventional example, and FIG. It is explanatory drawing which shows a 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 per fixed winding unit 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. A third winding portion is formed by winding between the first portion and the other flange, while each of the above-described winding steps is performed with a winding interval having a length shorter than the wire diameter. Winding method of electric winding parts. 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 the other winding portion to form a winding portion on the other side, on the other hand, in each of the above-mentioned winding steps, winding is performed with a winding interval having a length shorter than the wire diameter. Winding method for electric winding parts. 3. An electric winding part for winding a primary coil and a secondary coil between an iron core or a bobbin flange, wherein the forward winding and the winding pitch are wound in such a manner that the winding pitch is advanced in one direction. The winding process in which the winding is performed with the same number of turns as the return winding to be advanced is sequentially repeated. After forming a first winding portion by winding in a predetermined range from the flange of the winding, the winding step of winding the return winding with respect to the forward winding by reducing the number of windings in a unit of a fixed number of turns is sequentially performed A winding step of repeatedly forming a second winding portion in a predetermined range between the first winding portion and the other flange, and subsequently winding the forward winding and the return winding with the same number of turns, Repeatedly in turn, reducing the number of turns by a fixed number of turns in the other direction each time the winding process is repeated Winding is performed between the second winding portion and the other flange to form a third winding portion. Further, in each of the above-described winding processes, the winding is performed with a winding interval having a length shorter than the wire diameter. An electric winding component comprising: a secondary coil formed as described above; and a primary coil including an aligned winding wound to be an upper layer or a lower layer of the secondary coil.