JP6917243B2 - Seat coil - Google Patents

Description

An embodiment of the present invention relates to a seat coil formed by winding a sheet-shaped conductor.

Conventionally, in order to reduce the eddy current loss generated in the conductor forming the coil for the transformer, the inner peripheral side and the outer peripheral side are exchanged to equalize the amount of interlinkage with the leakage magnetic flux of the conductor, thereby circulating the circulating current. So-called dislocations that suppress the above may be adopted.

However, in a coil formed of a sheet-like conductor as described in Patent Document 1, for example, since the cross-sectional area of the conductor itself is relatively small, the amount of interlinkage of the leakage magnetic flux per unit conductor is also small. Therefore, no rearrangement was adopted.

Jikkenhei No. 2-4224

By the way, when high-frequency energization is performed, for example, in the case of a sheet-shaped conductor having a thickness of 1 mm, the current actually flows only in a region of about half the thickness, so that it is necessary to make the sheet-shaped conductor thinner. When a relatively thin sheet-shaped conductor is used, the current density needs to be about the same as that of a sheet-shaped conductor having a thickness of, for example, 1 mm in order to suppress the temperature rise, and a plurality of sheets need to be arranged in parallel. be.

However, when relatively thin sheet-like conductors are connected in parallel to secure the thickness, the current distribution does not improve so much without dislocation, but rather the Joule loss tends to increase. It turned out to be.
Therefore, a sheet coil capable of suppressing an increase in Joule loss when a sheet-shaped conductor is used is provided.

The sheet coil of the embodiment is a sheet coil formed by winding two sheet-shaped conductors arranged in parallel, and each sheet-shaped conductor is arranged on the inner peripheral side in one turn. The inner peripheral side and the outer peripheral side are interchanged so that the length and the length of the portion arranged on the outer peripheral side are equal to each other.

The figure which shows typically the transformer of 1st Embodiment The figure which shows the relationship between the thickness of a sheet-like conductor and Joule loss. The figure which shows typically the sheet-like conductor of the 1st aspect. The figure which shows typically the state which the sheet-like conductor is fitted The figure which shows typically the arrangement of the conductor in a seat coil The figure which shows typically the mode of dislocation of the sheet-like conductor of the 2nd aspect. The figure which shows typically the mode of dislocation of the sheet-like conductor of the 3rd aspect. FIG. 1 schematically showing a mode of dislocation of a sheet-like conductor according to a fourth aspect. FIG. 2 schematically showing a mode of dislocation of a sheet-like conductor FIG. 1 schematically showing a mode of dislocation of a sheet-like conductor according to a fifth aspect. FIG. 2 schematically showing a mode of dislocation of a sheet-like conductor The figure which shows typically the mode of dislocation by 2nd Embodiment

Hereinafter, a plurality of embodiments will be described with reference to the drawings.
(First Embodiment)
Hereinafter, the first embodiment will be described. In the first embodiment, a method of causing a plurality of dislocations when using two sheet-shaped conductors will be described.

First, common matters in each aspect will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, for example, the transformer 1 is formed by providing a coil on an iron core 2 formed in an annular shape. In the case of FIG. 1, the iron core 2 is provided with an inner peripheral coil 3 and an outer peripheral coil 4 as seat coils on each leg.

Each coil is provided with a lead wire 3a and a lead wire 4a at a winding start position, a winding end position, or an intermediate position. For example, the inner peripheral side coil 3 is on the primary side and the outer peripheral side coil 4 is on the secondary side. It realizes a transformer function. Further, each coil is formed by winding a sheet-like conductor having a thickness of less than 1 mm, for example, a sheet-like conductor having a thickness of about 0.25 mm to 0.5 mm, for a predetermined number of turns.

In such a sheet coil, since the cross-sectional area of the sheet-shaped conductor is relatively small, the amount of interlinkage of the leakage magnetic flux per unit conductor is also small, so that dislocations have not been adopted in the past. On the other hand, when high-frequency energization is performed, for example, even if the sheet-shaped conductor has a thickness of 1 mm, only about half the thickness of the current flows, so that it is necessary to make the sheet-shaped conductor thinner. When the sheet-shaped conductor is thinned, the current density needs to be about the same as that of a 1 mm thick conductor in order to suppress the temperature rise, and a plurality of sheets need to be arranged in parallel.

However, when a relatively thin sheet-like conductor is used, even if it is connected in parallel to secure the thickness, the current distribution does not improve so much unless dislocations are made. Rather, the graph without dislocations is shown in FIG. It was found that the Joule loss tends to increase as shown in G1. On the other hand, it was also found that in the case of dislocations, as shown in Graph G2 with dislocations in FIG. 2, the Joule loss tends to decrease as expected as the thickness of the sheet-like conductor becomes thinner.
Therefore, in the present embodiment, as shown below, the increase in Joule loss is suppressed by dislocating the sheet-shaped conductor in various modes.

<First aspect>
Hereinafter, the first aspect will be described with reference to FIGS. 3 to 5.
In this embodiment, a sheet coil is formed by two sheet-shaped conductors. Hereinafter, as shown in FIG. 3, one of the two sheet-shaped conductors is referred to as a first conductor 5, and the other is referred to as a second conductor 6.

The first conductor 5 and the second conductor 6 are formed so as to have substantially the same shape in length (W1) and width (W2). Hereinafter, the length direction of each conductor is referred to as the longitudinal direction, the width direction is referred to as the lateral direction, the upper end of the drawing in the lateral direction is referred to as the upper end of the drawing for convenience, and the lower end of the drawing in the lateral direction is referred to. The end of the figure is conveniently referred to as the lower end on the short side, the front side in the drawing is referred to as the front side for convenience, and the back side in the drawing is referred to as the back side for convenience.

The first conductor 5 and the second conductor 6 are insulated. Insulation treatment involves arranging insulating members between adjacent conductors in parallel, providing an insulating coating on at least one conductor, processing the surface of at least one conductor to increase contact resistance, or combining them. It can be applied by doing so.

A slit 7 is provided in each of the first conductor 5 and the second conductor 6. The slit 7 has a predetermined width (W3) in the longitudinal direction, and is formed in a shape that opens toward the upper end side or the lower end side of each conductor. Further, the slits 7 adjacent to each other in the longitudinal direction are formed so that the opening side is the opposite side in the lateral direction. Further, the first conductor 5 and the second conductor 6 are formed so that the opening sides are opposite to each other.

Specifically, in the first conductor 5, the slit 7 on the left end side in the drawing is open at the lower end on the end hand side, and the slit 7 adjacent to the slit 7 is open at the upper end on the end hand side. Further, in the second conductor 6, the slit 7 on the left end side in the drawing is open at the upper end on the end hand side, and the slit 7 adjacent to the slit 7 is open at the lower end on the end hand side. If the first conductor 5 is turned upside down in the lateral direction, it becomes the second conductor 6. Therefore, substantially, by using two sheet-shaped conductors of the same type and the same shape, the first conductor 5 and the second conductor 6 are used. And can be prepared.

Each slit 7 is formed so that the width of the cut (W4) exceeds half the width of the conductor (W1) and does not exceed the width of the conductor (W1). In this embodiment, the cut width (W4) of the slit 7 is formed to be slightly more than half the width (W1) of the conductor. Further, the distance between the slits 7 adjacent to each other in the longitudinal direction is set to half a turn (0.5T) when one winding in a state of being wound in an annular shape is one turn (1T).

Further, in each conductor, the portion opposite to the opening side of the slit 7, that is, the side on which the slit 7 is not formed and the sheet-shaped conductor is continuous, corresponds to the position of the slit 7. An auxiliary conductor 8 having substantially the same thickness as each conductor is provided in the portion. The auxiliary conductor 8 is formed so as to have a width (W5) longer than the width (W3) of the slit 7 in the longitudinal direction. The auxiliary conductor 8 is made of the same material as the first conductor 5 and the second conductor 6, and is electrically connected to the first conductor 5 or the second conductor 6 conductor by cold pressure welding or brazing at each portion. It is connected to the.

That is, the auxiliary conductor 8 increases the cross-sectional area of the continuous portion, which is about half the width (W2) of each conductor due to the formation of the slit 7, to the same extent as the portion where the slit 7 is not formed. .. As a result, a sufficient current can flow to the auxiliary conductor 8 side as well, and a current path can be secured.

The first conductor 5 and the second conductor 6 are wound together in a state of being arranged in parallel in the thickness direction to form a seat coil. At this time, the first conductor 5 and the second conductor 6 are wound so that the slits 7 are fitted to each other and the inner peripheral side and the outer peripheral side are switched at the position of the slit 7. Hereinafter, the position where the inner peripheral side and the outer peripheral side are interchanged is referred to as a dislocation position 9.

Specifically, as shown in FIG. 4, the first conductor 5 and the second conductor 6 arranged in parallel are located on the left side in the drawing with respect to the dislocation position 9, for example, the second conductor 6 is located on the front side in the drawing. If so, the slits 7 are fitted to each other so that the second conductor 6 is located on the back side in the drawing on the right side in the drawing with respect to the dislocation position 9. Further, although not shown, in the next slit 7 in the longitudinal direction, the slits 7 of each conductor are fitted so that the second conductor 6 is located on the front side in the drawing.

At this time, since the slits 7 are provided every 0.5T as described above, the first conductor 5 and the second conductor 6 are arranged in parallel in a state where the positions are exchanged every 0.5T. It will be. Therefore, when these conductors are wound in an annular shape, as shown in FIG. 5, an annular coil 10 in which the positions of the inner peripheral side conductor and the outer peripheral side conductor are exchanged every 0.5T, that is, a sheet coil is formed. Will be done.

Then, in the annular coil 10, for example, in the range of one turn from 0T at the start of winding to 1T at the first winding, the first conductor 5 is on the inner peripheral side and the second conductor 6 is on the outer circumference from 0T to 0.5T. The first conductor 5 is located on the outer peripheral side and the second conductor 6 is located on the inner peripheral side from 0.5T to 1T. Similarly, in the range of one turn from 0.5T to 1.5T, for example, the inner peripheral side and the outer peripheral side of the first conductor 5 and the second conductor 6 are switched every half turn.

That is, the first conductor 5 and the second conductor 6 are on the inner peripheral side and the outer peripheral side so that the length of the portion arranged on the inner peripheral side and the length of the portion arranged on the outer peripheral side in one turn are equal to each other. Can be replaced with. As a result, the increase in Joule loss can be suppressed by dislocation for each turn in the annular coil 10.

Further, although the relatively thin first conductor 5 and second conductor 6 are used, the current density can be increased by arranging them in parallel, and it can be applied to the transformer 1 that conducts high frequency energization. ..

Further, since the first conductor 5 and the second conductor 6 having the same overall length (W1) are dislocated by fitting the slit 7, the series resistance between the inner peripheral side and the outer peripheral side becomes equal. , A seat coil with a well-balanced current flow can be manufactured easily and efficiently.

Further, the first conductor 5 and the second conductor 6 are formed with slits 7 opposite to each other in the lateral direction corresponding to the dislocation positions 9 that are interchanged between the inner peripheral side and the outer peripheral side, and the slits 7 are connected to each other. By fitting, the inner circumference side and the outer circumference side are exchanged. As a result, it is possible to prevent the first conductor 5 and the second conductor 6 from being displaced in the lateral direction when the first conductor 5 and the second conductor 6 are fitted, that is, the respective conductors being prevented from coming off when the annular coil 10 is formed.

Further, since the first conductor 5 and the second conductor 6 become the other when one is turned inside out, the sheet coil can be formed of the same shape, that is, one kind of sheet-shaped conductor, and the manufacturing efficiency is improved and the member management is performed. Can be simplified.

Further, an auxiliary conductor 8 which is formed at least longer than the width (W3) of the slit 7 in the longitudinal direction and is electrically connected to the sheet-shaped conductor is provided in the continuous portion on the side where the slit 7 is not formed. As a result, the cross-sectional area at the position corresponding to the slit 7 increases and does not interfere with the current, so that deterioration of the characteristics can be suppressed.

In this embodiment, the slits 7 are formed alternately, but the slits 7 can also be formed so as to open on the same short side. Further, in that case as well, the sheet coil can be formed by using the sheet-shaped conductor having the same shape.

<Second aspect>
Hereinafter, the second aspect will be described with reference to FIG. In this embodiment, two sheet-shaped conductors are collectively bent and dislocated.

As shown in FIG. 6, one of the two sheet-shaped conductors is referred to as a first conductor 5, and the other is referred to as a second conductor 6. For the sake of simplification of the explanation, the second conductor 6 is hatched for convenience. Further, the length direction of each conductor is referred to as the longitudinal direction and the width direction is referred to as the lateral direction, and the upper end in the drawing direction in the lateral direction is conveniently referred to as the upper end on the short side, and the lower end in the drawing direction is referred to as the short end. The end of the figure is conveniently referred to as the lower end on the short side, the front side in the drawing is referred to as the front side for convenience, and the back side in the drawing is referred to as the back side for convenience.

The first conductor 5 and the second conductor 6 are formed in a shape having substantially the same overall length and width. At least one of the surfaces of the first conductor 5 and the second conductor 6 is insulated. The insulation treatment can be performed by arranging an insulating member between adjacent conductors in parallel, providing an insulating coating, processing the surface to increase the contact resistance, combining them, and the like.

By the way, the first conductor 5 and the second conductor 6 are dislocated by exchanging the inner peripheral side and the outer peripheral side by bending them all at once while facing each other. At this time, the first conductor 5 and the second conductor 6 are collectively bent every half turn. More specifically, the first conductor 5 and the second conductor 6 are basically arranged in parallel in the longitudinal direction. For example, on the left end side of the drawing, the first conductor 5 is on the back side and the second conductor 6 is on the front side. It is assumed that they are arranged in parallel so as to be on the side.

At this time, each conductor is collectively bent in the lateral direction so that the first conductor 5 is on the front side in the drawing at the dislocation position 9, and then directed toward the front side in the drawing at the upper end position on the end hand side. Then, the first conductor 5 and the second conductor 6 are arranged in parallel with the first conductor 5 on the front side in the drawing. Has been done.

As a result, the first conductor 5 and the second conductor 6 are replaced at the dislocation position 9. Further, the conductors are arranged in parallel before and after the dislocation position 9. Then, by winding the first conductor 5 and the second conductor 6, the inside of the seat coil is in a state of being dislocated for each winding as shown in FIG. 5, and the increase in Joule loss can be suppressed. can.

Further, since the dislocation is performed every half turn, the length of the portion arranged on the inner peripheral side and the length of the portion arranged on the outer peripheral side become equal in one turn, and the possibility of deterioration of the characteristics is reduced. be able to.

<Third aspect>
Hereinafter, the third aspect will be described with reference to FIG. 7. In this embodiment, one of the two sheet-shaped conductors is bent and dislocated.

As shown in FIG. 7, one of the two sheet-shaped conductors is referred to as a first conductor 5, and the other is referred to as a second conductor 6. In FIG. 7, for the sake of simplification of the description, the second conductor 6 is provided with convenient hatching. Further, the length direction of each conductor is referred to as the longitudinal direction and the width direction is referred to as the lateral direction, and the upper end in the drawing direction in the lateral direction is conveniently referred to as the upper end on the short side, and the lower end in the drawing direction is referred to as the short end. The end of the figure is conveniently referred to as the lower end on the short side, the front side in the drawing is referred to as the front side for convenience, and the back side in the drawing is referred to as the back side for convenience.

The first conductor 5 and the second conductor 6 are formed in a shape having substantially the same width. Further, the first conductor 5 and the second conductor 6 are subjected to an insulating treatment. Insulation treatment involves arranging insulating members between adjacent conductors in parallel, providing an insulating coating on at least one conductor, processing the surface of at least one conductor to increase contact resistance, or combining them. It can be applied by doing so.

In this embodiment, at a certain dislocation position 9, one of the two sheet-shaped conductors, here the first conductor 5, is not bent, and here, the second conductor 6 is attached to the short end of the first conductor 5. By bending through the conductor, the inner peripheral side and the outer peripheral side are exchanged and dislocated. At this time, the conductors are arranged in parallel before and after the dislocation position 9. Further, the second conductor 6 is dislocated at the next dislocation position 9 (not shown) corresponding to the half-turn position. Although it is bent via the upper end of the first conductor 5 in FIG. 7, it can also be bent via the lower end of the first conductor 5.

As a result, the two sheet-shaped conductors can be dislocated without the need for processing the sheet-shaped conductors themselves. Further, since the dislocation is performed for each turn in the seat coil, an increase in Joule loss can be suppressed. In addition, since the dislocation is performed every half turn, the length of the portion arranged on the inner peripheral side and the length of the portion arranged on the outer peripheral side become equal in one turn, and the possibility of deterioration of the characteristics is reduced. Can be done.

Further, when a relatively thick sheet-shaped conductor is used, the conductor may be broken if two sheets are overlapped and bent, but the conductor may be broken by bending and shifting one of the sheet-shaped conductors as in this embodiment. Can be reduced.

By the way, if only the second conductor 6 is bent without bending the first conductor 5, there will be a difference in length between the first conductor 5 and the second conductor 6 at the dislocation position 9. Therefore, for example, when a plurality of dislocation positions 9 exist as shown in FIG. 5, the sheet-like conductors that do not bend and the sheet-like conductors that bend can be exchanged in the longitudinal direction for the two sheet-like conductors.

Specifically, when the second conductor 6 is bent and dislocated at 0.5T shown in FIG. 5 without bending the first conductor 5, the first conductor 5 is bent at 1T and the second conductor 5 is bent. The conductor 6 can be dislocated without bending. As a result, the length deviations that occur at each dislocation position 9 are canceled at the adjacent dislocation positions 9, and the lengths of the conductors in one turn can be made substantially equal.

<Fourth aspect>
Hereinafter, the fourth aspect will be described with reference to FIGS. 8 and 9. In this embodiment, two types of dislocations will be described by dividing one of the two sheet-shaped conductors into two.

[Aspect 1]
As shown in FIG. 8, one of the two sheet-shaped conductors is referred to as a first conductor 5, and the other is referred to as a second conductor 6. In FIG. 8, for the sake of simplification of the description, the second conductor 6 is provided with convenient hatching. Further, the length direction of each conductor is referred to as the longitudinal direction and the width direction is referred to as the lateral direction, and the upper end in the drawing direction in the lateral direction is conveniently referred to as the upper end on the short side, and the lower end in the drawing direction is referred to as the short end. For the sake of convenience, the end portion of is referred to as the lower end on the short side.

The first conductor 5 and the second conductor 6 are insulated. Insulation treatment involves arranging insulating members between adjacent conductors in parallel, providing an insulating coating on at least one conductor, processing the surface of at least one conductor to increase contact resistance, or combining them. It can be applied by doing so.

The first conductor 5 and the second conductor 6 are formed to be relatively wide, and the second conductor 6 is divided into two in the lateral direction. Hereinafter, the divided portions constituting the second conductor 6 will be referred to as a second conductor 6A and a second conductor 6B for convenience. The second conductor 6A and the second conductor 6B do not necessarily have to be formed by cutting the second conductor 6, and two individual sheet-shaped conductors having a width substantially half that of the second conductor 6 can be used. ..

The second conductor 6A and the second conductor 6B are arranged in parallel with the first conductor 5 along the longitudinal direction, for example, on the back surface side of the first conductor 5 in a state of being arranged in the lateral direction of the first conductor 5. There is. Then, the second conductor 6A and the second conductor 6B arranged on the back surface side of the first conductor 5 are at a certain dislocation position 9, and are the ends of the first conductor 5 on different short sides, that is, the first conductor 5. After being bent via the upper end and the lower end of the one conductor 5, they are dislocated by being arranged in parallel with the first conductor 5 along the longitudinal direction on the surface of the first conductor 5.

Further, the conductors are arranged in parallel before and after the dislocation position 9. At this time, the second conductor 6A and the second conductor 6B are dislocated by being bent at the next dislocation position 9 corresponding to the half-turn position via different short sides of the first conductor 5. There is.

That is, in this embodiment, the first conductor 5 which is one sheet-like conductor is not bent, and the second conductor 6 which is the other sheet-like conductor is divided into two in the lateral direction. A second conductor 6A and a second conductor 6B are respectively arranged along the longitudinal direction of the first conductor 5, and are bent via different short end portions of the first conductor 5. , The inner peripheral side and the outer peripheral side are interchanged and displaced.

At this time, since the second conductor 6A and the second conductor 6B are dislocated every half turn, the length of the portion arranged on the inner peripheral side and the length of the portion arranged on the outer peripheral side in one turn are different. Approximately equal.

As a result, it is possible to suppress an increase in Joule loss even when a sheet-shaped conductor is used, and it is possible to reduce the possibility that the characteristics are deteriorated. Further, since the sheet-shaped conductor itself does not need to be processed, the two sheet-shaped conductors can be dislocated, so that the production can be simplified and the efficiency can be improved.

[Aspect 2]
The first conductor 5 and the second conductor 6 may have other arrangements. Specifically, as shown in FIG. 9, the second conductor 6A and the second conductor 6B are positioned so as to be staggered in the lateral direction of the first conductor 5 on the front surface side and the back surface side of the first conductor 5. , Can be arranged in parallel with the first conductor 5 along the longitudinal direction.

In this case, the second conductor 6A and the second conductor 6B are the ends on the short side closer to themselves at a certain shift position 9, that is, the upper end of the first conductor 5 in the case of the second conductor 6A. In the case of the two conductors 6B, after being bent via the lower end of the first conductor 5, they are arranged so as to be parallel to the first conductor 5 along the longitudinal direction on the surface of the first conductor 5.

That is, the conductors are arranged in parallel before and after the dislocation position 9. Further, the second conductor 6A and the second conductor 6B are dislocated by being bent at the next dislocation position 9 corresponding to the half-turn position via different short sides of the first conductor 5. ..

With such a configuration, it is possible to suppress an increase in Joule loss, reduce the possibility of deterioration of characteristics, and further, it is not necessary to process the sheet-shaped conductor itself, and two sheets are used. Since the shaped conductor can be dislocated, effects such as simplification of manufacturing and efficiency can be obtained.

<Fifth aspect>
Hereinafter, the fifth aspect will be described with reference to FIG. In this embodiment, two types of modes in which two sheet-shaped conductors are dislocated by dividing each into two will be described.

[Aspect 1]
As shown in FIG. 10, one of the two sheet-shaped conductors is referred to as a first conductor 5, and the other is referred to as a second conductor 6. In FIG. 8, for the sake of simplification of the description, the second conductor 6 is provided with convenient hatching. Further, the length direction of each conductor is referred to as the longitudinal direction and the width direction is referred to as the lateral direction, and the upper end in the drawing direction in the lateral direction is conveniently referred to as the upper end on the short side, and the lower end in the drawing direction is referred to as the short end. For the sake of convenience, the end portion of is referred to as the lower end on the short side.

The first conductor 5 and the second conductor 6 are insulated. Insulation treatment involves arranging insulating members between adjacent conductors in parallel, providing an insulating coating on at least one conductor, processing the surface of at least one conductor to increase contact resistance, or combining them. It can be applied by doing so.

The first conductor 5 and the second conductor 6 are formed to be relatively wide and are divided into two in the lateral direction. Hereinafter, the divided portions constituting the first conductor 5 will be referred to as the first conductor 5A and the first conductor 5B for convenience, and the divided portions constituting the second conductor 6 will be referred to as the second conductor for convenience. It is referred to as a conductor 6A and a second conductor 6B.

The first conductor 5A, the first conductor 5B, the second conductor 6A, and the second conductor 6B do not necessarily have to be formed by cutting the first conductor 5 or the second conductor 6, and are individually formed having a width of about half. A sheet-like conductor can also be used. In the present embodiment, four sheet-like conductors of the same type formed in a width half the required width are used, and the first conductor 5A, the first conductor 5B, the second conductor 6A and the second conductor 6B are used. Are each configured.

The first conductor 5A and the second conductor 6A are arranged in parallel along the longitudinal direction. Further, the first conductor 5B and the second conductor 6B are also arranged in parallel along the longitudinal direction. Then, the second conductor 6A and the second conductor 6B arranged on the back surface side of the first conductor 5 are arranged at a certain transition position 9, and the end portions on the short side of the first conductor 5A and the first conductor 5B, for example, After being bent via the upper end of the first conductor 5A and the lower end of the first conductor 5B, respectively, the first conductor 5A and the first conductor 5B are parallel to the first conductor 5 along the longitudinal direction on the surface side. It is rearranged by being arranged in such a manner.

Further, the second conductor 6A and the second conductor 6B are bent at the next dislocation position 9 corresponding to the half-turn position via the short side of the first conductor 5, and are bent on the back surface side of the first conductor 5. The first conductor 5 is rearranged so as to be in parallel. That is, the conductors are arranged in parallel before and after the dislocation position 9.

As described above, in this embodiment, the two sheet-shaped conductors are each divided into two in the lateral direction, and the divided parts are arranged in parallel and one of the parts is bent. The inner peripheral side and the outer peripheral side are exchanged by bending the other part via the end portion on the end hand side of the other part.

At this time, since the second conductor 6A and the second conductor 6B are dislocated every half turn, the length of the portion arranged on the inner peripheral side and the length of the portion arranged on the outer peripheral side in one turn are different. Approximately equal.

As a result, it is possible to suppress an increase in Joule loss even when a sheet-shaped conductor is used, and it is possible to reduce the possibility that the characteristics are deteriorated. Further, since the sheet-shaped conductor itself does not need to be processed, the two sheet-shaped conductors can be dislocated, so that the production can be simplified and the efficiency can be improved.

Further, by arranging the dislocation positions 9 at positions that do not overlap each other in the longitudinal direction of the sheet-shaped conductor, dislocations can be continuously performed over the entire circumference of the annular coil 10, and the effect of reducing Joule loss is improved. be able to.

In this case, at a certain dislocation position 9, the second conductor 6 may be bent at one of the divided portions, and the first conductor 5 may be bent at the other of the divided portions.

[Aspect 2]
In the first aspect, an example of dislocating the second conductor 6 by bending the second conductor 6 via the outer end of the first conductor 5 is shown, but as shown in FIG. 11, the first conductor 5 is on the split position side. The second conductor 6A and the second conductor 6B are bent via the end portion, that is, the end portion between the first conductor 5A and the first conductor 5B, and the conductors are parallel to each other before and after the dislocation position 9. It can be rearranged so that it is arranged.

Further, the dislocation positions 9 may be positions that do not overlap each other in the longitudinal direction. In this case, the straddling white that straddles the first conductor 5 and protrudes from the end of the first conductor 5 is set to the division position side and is displaced in the longitudinal direction. Therefore, the width between the divided conductors need only be secured for one straddling white, and the dimension in the width direction of each conductor, that is, the height dimension of the seat coil can be shortened, and the window of the transformer 1 can be shortened. It is possible to prevent an increase in dimensions.

(Second Embodiment)
Hereinafter, the second embodiment will be described with reference to FIG. In the second embodiment, a method of dislocating when forming a sheet coil using one sheet-shaped conductor will be described.

In this embodiment, as shown in FIG. 12, a sheet coil is formed by using a single conductor 20 which is one sheet-like conductor. Hereinafter, the length direction of the single conductor 20 is referred to as the longitudinal direction and the width direction is referred to as the lateral direction, and the upper end of the drawing in the lateral direction is conveniently referred to as the upper end of the minor side. For convenience, the lower end is referred to as the lower end on the short side, the front side in the drawing is referred to as the front surface 20a of the single conductor 20, and the back side in the drawing is referred to as the back surface 20b. Further, in FIG. 12, for simplification of the description, convenient hatching is attached to the back surface 20b of the single conductor 20.

The single conductor 20 is insulated on at least one surface. The insulation treatment can be performed by providing an insulating coating on the single conductor 20, surface-treating the single conductor 20 to increase the contact resistance, or combining them.

Then, at the dislocation position 9, the single conductor 20 has the front surface 20a and the back surface 20b so that the length arranged on the inner peripheral side and the length arranged on the outer peripheral side become equal in one turn. The peripheral side and the outer peripheral side are interchanged. Specifically, at the dislocation position 9, the back surface 20b is bent toward the front side in the drawing so as to be on the front side in the drawing, and after being bent toward the front side in the drawing at the upper end position, the back surface 20b is on the front side in the drawing. And, it is bent so as to be parallel to the surface 20a on the left side in the drawing with respect to the dislocation position 9.

As a result, the ease of current flow in the longitudinal direction of the single conductor 20 can be made uniform on the front surface side and the back surface side of the single conductor 20, and the current flow can be substantially made on the front surface side and the back surface side. That is, it can be made uniform on the inner peripheral side and the outer peripheral side in the state of being formed in an annular shape.
Therefore, even when a sheet-shaped conductor is used, an increase in Joule loss can be suppressed.
Further, since the single conductor 20 does not need to be processed and can be dislocated by simply bending it, manufacturing can be simplified and efficiency can be improved.

(Other embodiments)
In each embodiment, an example of dislocation every half turn is shown, but if the length of the portion arranged on the inner peripheral side and the length of the portion arranged on the outer peripheral side in one turn are equal, for example, 1 It can also be configured to shift every 4 turns. Also in this case, the same effect as that of the embodiment can be obtained, such as suppressing an increase in Joule loss.
In addition to the bending method shown in each embodiment, the bending method is such that the inner peripheral side and the outer peripheral side can be exchanged at the dislocation position 9 and the conductors are substantially flush with each other before and after the dislocation position 9. Other bending methods can also be adopted.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

In the drawing, 3 is the inner peripheral side coil (seat coil), 4 is the outer peripheral side coil (seat coil), 5, 5A and 5B are the first conductors (sheet-like conductors), and 6, 6A and 6B are the second conductors (sheets). (Shaped conductor), 7 is a slit, 8 is an auxiliary conductor, 9 is a shift position, 10 is an annular coil (sheet coil), and 20 is a single conductor (sheet-shaped conductor).

Claims (7)

A sheet coil formed by winding two sheet-like conductors arranged in parallel.
Each of the sheet-shaped conductors is exchanged between the inner peripheral side and the outer peripheral side so that the length of the portion arranged on the inner peripheral side and the length of the portion arranged on the outer peripheral side in one turn are equal to each other.
The two sheet-shaped conductors are formed with slits in opposite directions in the lateral direction corresponding to the dislocation positions where the inner peripheral side and the outer peripheral side are exchanged, and the inner circumference is formed by fitting the slits to each other. A seat coil in which the side and the outer peripheral side are interchanged. An auxiliary conductor electrically connected to the sheet-shaped conductor and formed at least longer than the width of the slit is provided at a continuous portion which is a portion on the side where the sheet-shaped conductor is continuous at the dislocation position. The seat coil according to claim 1. A sheet coil formed by winding two sheet-like conductors arranged in parallel.
Each of the sheet-shaped conductors is exchanged between the inner peripheral side and the outer peripheral side so that the length of the portion arranged on the inner peripheral side and the length of the portion arranged on the outer peripheral side in one turn are equal to each other.
The two sheet-like conductors can be formed between the inner peripheral side and the outer peripheral side by bending the other sheet-like conductor via the short side of the one sheet-like conductor without bending one sheet-like conductor. The seat coil that has been replaced. A sheet coil formed by winding two sheet-like conductors arranged in parallel.
Each of the sheet-shaped conductors is exchanged between the inner peripheral side and the outer peripheral side so that the length of the portion arranged on the inner peripheral side and the length of the portion arranged on the outer peripheral side in one turn are equal to each other.
In the two sheet-shaped conductors, one of the sheet-shaped conductors is divided into two in the lateral direction.
Each of the divided parts is arranged along the longitudinal direction of the other sheet-shaped conductor, and is bent via the short end of the other sheet-shaped conductor to form an inner peripheral side. A seat coil in which the outer peripheral side and the outer peripheral side are exchanged. The sheet coil according to claim 4, wherein the divided portions are alternately arranged in parallel along the longitudinal direction on the inner peripheral side and the outer peripheral side of the other sheet-shaped conductor. A sheet coil formed by winding two sheet-like conductors arranged in parallel.
Each of the sheet-shaped conductors is exchanged between the inner peripheral side and the outer peripheral side so that the length of the portion arranged on the inner peripheral side and the length of the portion arranged on the outer peripheral side in one turn are equal to each other.
The two sheet-shaped conductors are each divided into two in the lateral direction.
Each of the divided parts is arranged in parallel, and the other part is bent via the end of one part on the end hand side without bending one part. A seat coil in which the inner peripheral side and the outer peripheral side are interchanged. The sixth aspect of claim 6, wherein each of the divided portions passes through an end portion of the other sheet-shaped conductor on the divided position side and is bent at a position where the sheet-shaped conductors do not overlap each other in the longitudinal direction. Seat coil.

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