JPH0638218U - Transformer winding - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a compact cylindrical winding of a transformer with a low loss and a high space factor. [Structure] A cylindrical winding of a transformer configured by stacking a plurality of conductors in parallel in the radial direction on the outer periphery of an iron core 3 and winding a plurality of layers in a solenoid shape. The transformer winding is configured by transposing and winding the inner and outer positions of the plurality of parallel conductors at a position where the total magnetic flux linkage amount is 1/2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a transposed structure of conductors of a parallel winding cylindrical winding of a transformer.

[0002]

[Prior art]

 In a cylindrical winding of a transformer constructed by stacking multiple conductors in parallel in the radius (inside and outside) direction on the outer periphery of the iron core and winding multiple layers in a solenoid shape, each parallel conductor has a magnetic flux chain inside and outside. When the amount of intersection is different and these are arranged in parallel, a circulating current flows. In order to suppress this circulating current, the positions of the inner and outer conductors are exchanged at the center of the winding in each layer in the axial direction so that the conductors have the same interlinkage, and the induced voltage of the inner and outer conductors is equalized. The difference in induced voltage between them is zero).

For example, as shown in FIG. 2, when two conductors A and B are overlapped in the radial direction and arranged in parallel and wound in two layers, in the upper half of the first layer from the iron core 3 side, the conductor A Are arranged on the inner side, the conductor B is arranged on the outer side, and the conductor B is arranged on the inner side and the conductor A is arranged on the outer side in the lower half of the first layer. Further, in the lower half of the second layer from the side of the iron core 3, the conductor A is arranged on the inner side and the conductor B is arranged on the outer side, and the conductor B is displaced in the central portion in the axial direction of the winding, and in the upper half of the second layer, the conductor B is arranged on the inner side. In addition, the conductor A 1 is arranged outside.

As an example of a conventional cylindrical winding, when two conductors A and B are wound in parallel, as shown in FIG. 3, the leakage magnetic flux density of the coil 4 on the iron core 3 side is B _A and the interlinkage area is Is S _A , the induced voltage is E _A , the leakage magnetic flux density of the coil 5 outside the coil 4 is B _B , the interlinkage area is S _B , and the induced voltage is E _B , then E _A = −N · dΦ _A / Dt = −N · d (B _A × S _A ) / dt E _B = −N · dΦ _B / dt = −N · d (B _B × S _B ) / dt, and the differential voltage ΔE is as follows. Become.

ΔE = | E _A −E _B | = −N · d (B _A × S _A −B _B × S _B ) / dt Therefore, the inside and the outside of the two conductors A and B are in the axial direction of the winding. Due to the dislocation at the center of the height of B _A , B _A × S _A and B _B × S _B become almost equal, and the difference voltage ΔE becomes almost zero.

[0006]

[Problems to be solved by the device]

 However, it is necessary to carry out rearrangement by exchanging the inside and outside of each of a plurality of layers, and when the number of layers is large, many rearrangement operations are required and the processing man-hours are required. In addition, a space is required for the structure because of dislocation, and the space factor is reduced. That is, in FIG. 4, as shown by the arrow (→), the conductor A is wound from the upper side and the conductor B is wound from the upper side, and the coil is wound at the dislocation position at the center of the axial height of the winding. In order to put the conductor A outside and put the conductor B inside, a space 6 for the dislocation indicated by diagonal lines (approximately (1 + α) turns of the conductor width) 6 is required. The space factor of the conductor in the winding is reduced, and the entire winding and the transformer body are enlarged.

The present invention has been made in view of the above points, and an object thereof is to provide a compact cylindrical winding of a transformer with a small loss and a high space factor.

[0008]

[Means for Solving the Problems]

 In the transformer winding of the present invention, a cylindrical winding of a transformer is formed by stacking a plurality of conductors in a radial direction in parallel on the outer periphery of an iron core and winding a plurality of layers in a solenoid shape. The structure is such that the inner and outer positions between the plurality of parallel conductors are transposed and wound at a position at which the total magnetic flux linkage amount of all layers for each conductor is 1/2.

[0009]

[Action]

 As described above, the cylindrical winding of the transformer is configured by stacking a plurality of conductors in parallel in the radial direction on the outer periphery of the iron core and winding a plurality of layers in a solenoid shape. Since the inner and outer positions of the plurality of parallel conductors are transposed and wound at a position at which the total magnetic flux linkage amount of all the layers is half, the number of dislocations between the inner and outer conductors is once. The space for transposition is not required, the space factor is improved, the entire transformer can be made compact, and a good-quality winding that does not generate circulating current between conductors can be obtained.

[0010]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a connection diagram showing an embodiment of a transformer winding of the present invention. FIG. 1 shows that two conductors 1 and 2 having an insulating coating are overlapped in a radial direction in parallel and are arranged on the outer periphery of an iron core 3. The figure shows the case where two layers are wound. In FIG. 1, the magnetic flux density at the inner position of the first layer is B ₁ , the circumferential length is L ₁ , the number of turns is T _1, and the magnetic flux density at the outer position is B ₂ , the circumferential length is L ₂ , and the number of turns is T ₁ turn. The magnetic flux density at the inner position of the second layer is B ₃ , the circumferential length is L ₃ , and the number of turns is T ₂ turns. The magnetic flux density at the outer position is B ₄ , the circumferential length is L ₄ , and the number of turns is T ₂ turns. Therefore, when L ₁ <L ₂ <L ₃ <L ₄ , the conductor 1 is placed inside and the conductor 2 is placed outside in the first layer. At the end of the winding of the eye, the conductor 2 is wound inside and the conductor 1 is wound outside.

If the induced voltage of the conductor 1 is E ₁ and the induced voltage of the conductor 2 is E ₂ , then E ₁ = − (T ₁ + T ₂ ) dΦ ₁ / dt E ₂ = − (T ₁ + T ₂ ) dΦ ₂ / Dt, therefore, B ₁ · L ₁ · T ₁ + B ₃ XL ₃ + B ₄ L ₄ (T ₂ −X) = B ₂ · L ₂ · T ₁ + B ₄ L ₄ X + B ₃ L ₃ (T ₂ − X turn position satisfying X), that is, the X turn from the bottom of the second layer, which is 1/2 of the total magnetic flux linkage amount of all the magnetic flux linkage amounts of the conductors 1 and 2 arranged in parallel. At the eye position, the dislocations of the inside and outside should be exchanged only once.

The above description has been made for the case where the number of conductors is two and the number of layers is two. However, the same applies to the case where the number of conductors is two and three or more, and the case where three or more conductors are connected in parallel is also the same.

[0013]

[Effect of device]

 As described above, in the cylindrical winding of a transformer configured by stacking multiple conductors in parallel in the radial direction on the outer periphery of the iron core and winding multiple layers in the shape of a solenoid, for each conductor arranged in parallel. Since the inner and outer positions of the plurality of parallel conductors are transposed and wound at a position that is 1/2 of the total magnetic flux linkage amount obtained by adding up all the layers of the magnetic flux linkage amount, 1) The number of dislocations between the inner and outer conductors can be reduced to one.

(2) A space for dislocation is not required and the space factor is improved, so that the device can be made compact.

(3) Since a circulating current between conductors is not generated, a good quality transformer winding is obtained.

Excellent effects such as the above can be obtained.

[Brief description of drawings]

FIG. 1 is a connection diagram showing an embodiment of a transformer winding of the present invention.

FIG. 2 is a connection diagram showing an example of a conventional transformer winding.

FIG. 3 is a relational diagram of induced voltage and dislocation in a cylindrical transformer winding in which two conventional conductors are wound in parallel.

FIG. 4 is a detailed transposition view showing an example of a transposition state of a conventional transformer winding.

[Explanation of symbols]

1, 2 conductor 3 ... core _{B 1, B 2, B 3} , B 4 ... flux density _{L 1, L 2, L 3} , L 4 ... circumferential length T _1, T _2, X ... number of turns

Claims (1)

[Scope of utility model registration request] 1. A cylindrical winding of a transformer configured by laminating a plurality of conductors in parallel in a radial direction on an outer periphery of an iron core and winding a plurality of layers in a solenoid shape, and all layers for each conductor to be arranged in parallel. The transformer winding is characterized in that the inner and outer positions of the plurality of parallel conductors are transposed at a position where the total magnetic flux linkage amount is 1/2.