JPS6214656Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to windings for induction electric appliances such as transformers and reactors.

Figures 1 and 2 show the winding configuration of a conventional transformer, where 1 is an iron core, 2 and 3 are low voltage windings and high voltage windings wound around iron core 1, respectively, and high voltage winding 3 is a winding shaft. Consisting of two winding parts 3a, 3b separated in direction, each winding part 3a, 3b is connected in parallel between lead wires 4, 5, and each winding part 3a, 3b is connected to two conductors A, B. It is a parallel volume. In FIG. 2, 1A to 16A and 1B to 16B indicate the windings of each conductor A, B, and a to d indicate each unit coil, and the unit coils a to d constitute one winding unit, Each winding portion 3a, 3b is constructed by connecting a plurality of winding units in series. In each of the unit coils a to d, conductors A and B are alternately arranged with high series capacitance winding. In addition, the winding parts 3a and 3b
is constructed symmetrically when viewed from the axial center A of the winding.

However, in the conventional transformer winding having the above configuration, conductor A is located in unit coils a and c, and conductor B is located in unit coils b and d, respectively, and conductor A is located closer to the end of the winding than conductor B. It is located in On the other hand, the leakage magnetic flux is bent at both axial ends of the winding. For this reason, an imbalance occurs in the number of magnetic flux linkages between the leakage magnetic flux and the conductors A and B, resulting in a difference in leakage reactance. Therefore, conductors A and B connected in parallel
Circulating current flows between them, increasing copper loss and increasing temperature rise. Therefore, it becomes necessary to increase the step area of each conductor A and B or to widen the cooling duct, leading to an increase in the size of the transformer. was invited.

SUMMARY OF THE INVENTION An object of the present invention is to provide an induction wire that can reduce the size of the induction device by eliminating the above-mentioned drawbacks.

Embodiments of the present invention will be described below with reference to the drawings.
3 and 4 show the structure of a transformer winding according to an embodiment of the present invention, the high voltage winding 6 is composed of two winding parts 6a and 6b divided in the winding axis direction, and each winding part 6 is divided into two winding parts 6a and 6b.
a and 6b are connected in parallel between the lead wires 4 and 5, and are configured symmetrically when viewed from the axial center A of the winding 6. Further, each winding portion 6a, 6b is formed by winding two conductors A, B in parallel.
At both ends in the axial direction, each conductor A, B is 1A~4A and 1B~ in the first unit coil _a1 , b1 _, respectively.
4B are wound in parallel in the axial direction, and the axial positions of conductors A and B are shifted at the inner transition part to form the first unit coil a ₁
to d ₁ and from b ₁ to c ₁ , the first unit coil
5B to 8B and 5A to 8A in c ₁ and d ₁ respectively
The first unit coil d ₁ is wound at the outer transition part.
Connect from B ₁ to C ₁ to A ₁ , and connect the first unit coil
9A to 12A and 9B to 12B are inserted and wound between 1B to 4B and 1A to 4A at b 1 _and a ₁ , and the axial positions of conductors A and B are further shifted at the inner transition part to form the first unit coil b. ₁ to c ₁ and from a ₁ to d ₁ , and 5B to 8 in the first unit coil c ₁ and d _1.
13A to 16A and 13B to 16B are inserted and wound between B and 5A to 8A, respectively, and the first unit coil is
A first winding unit consisting of a ₁ to d ₁ is formed. Therefore, the first winding unit is a high series capacitance winding of parallel conductors A and B. The first winding unit is 1~
Provide about 3 of them and connect them in series. Further, in the central part of the winding 6, a plurality of second winding units are provided which are made up of second unit coils a ₂ and b ₂ and are connected to the first winding unit. In the second winding unit, conductors A and B have a cross-sectional area that is almost equal to that in the first winding unit and a small radial dimension, and these conductors A and B are wound radially overlapping each other, and the second unit coil is In a ₂ , wind from 1A to 4A and from 1B to 4B, and at the inner transition part conductor A,
Transpose B radially and connect it to the second unit col b ₂ ,
In the unit coil _b2 , 5A to 8A and 5B to 8B are wound, and thereafter 9A to 16A and 9B to 16B are similarly wound so as to provide high series capacitance winding.
That is, in the second winding unit, the same potential winding conductors 1A, 1B to 16A, 16B are overlapped in the radial direction to form a conductor block, and these conductor blocks are overlapped in the radial direction of the winding wire to form the second winding. 2 units col a ₂ ,
form b ₂ . FIG. 4 shows the specific structure of the winding 6, and 7 shows the insulation between turns.

In the above winding 6, the parallel conductors A and B are wound in parallel in the axial direction, and are transposed in the axial direction at the inner transition part at both ends in the axial direction (i.e., each winding unit), and are wound in a high series capacitance winding. , As a result, conductor A,
The turns of B will be arranged alternately in the radial and axial directions. Therefore, the number of magnetic flux linkages with the radial component of the leakage magnetic flux becomes almost the same in the conductors A and B, and the circulating current between the conductors A and B becomes extremely small. Therefore, the copper loss and temperature rise of the entire winding are small, there is no need to increase the cross-sectional area of conductors A and B or the cooling duct, and the winding can be made smaller, as well as the transformer as a whole. It can be done. In addition, the radial dimensions of conductors A and B are made small in the parts other than both axial ends of the winding where the leakage flux passes in the axial direction (i.e., each winding unit), so the influence of the leakage flux in the vertical direction is also reduced. be able to.

In the above embodiment, an example of a high-voltage winding of a transformer is shown, but the present invention can also be applied to a low-voltage winding of a transformer or a reactor winding. The present invention can also be applied to cases where there are three or more parallel conductors A and B.

As described above, in the present invention, a plurality of parallel conductors are arranged and wound in the axial direction at both axial ends of the winding, and the axial position of each parallel conductor is shifted at the inner transition portion. For this reason, each parallel conductor is no longer arranged so that only a specific one is biased toward the axial end, and the number of magnetic flux linkages with the radial component of leakage magnetic flux in each parallel conductor is averaged, and the parallel conductor Circulating current becomes difficult to flow between them. Therefore, temperature rise due to increased copper loss can be suppressed, so there is no need to increase the cross-sectional area of parallel conductors or widen cooling ducts, and the winding can be made smaller. Therefore, the induction electric appliance can be made smaller. Furthermore, in the present invention, a plurality of conductor blocks formed by overlapping a plurality of wound conductors of the same potential in the radial direction are arranged in a region located between both ends of the winding in the axial direction. A plurality of second winding units are provided by stacking these second unit coils in the axial direction of the windings and transposing them in the axial direction, and As each conductor, a conductor having a cross-sectional area approximately equal to that of the conductor of the first winding unit and smaller than the dimension in the radial direction of the winding is used. Therefore, it is possible to obtain a winding that is less affected by leakage flux in the vertical direction.

[Brief explanation of the drawing]

1 and 2 are diagrams of a conventional transformer and a diagram of a high-voltage winding, respectively, and Figs. 3 and 4 are diagrams of a transformer high-voltage winding according to an embodiment of the present invention and a more specific diagram of the winding.
6b: winding portion; 1A to 16A: winding of conductor A; 1B to 16B: winding of conductor B; _a1 , _b1 ,
c ₁ , d ₁ : first unit coil, a ₂ , b ₂ : second unit coil, . . . first winding unit, .

Claims (1)

[Claims for Utility Model Registration] Two winding portions 6 separated in the axial direction of the winding 6
A, 6b are connected in parallel, and each of the winding portions 6a, 6b is formed into a plurality of first unit coils by winding a plurality of conductors A, B overlappingly in the radial direction at both ends of the winding portion 6. a ₁ , b ₁ , c ₁ , d ₁
and these first unit coils a ₁ , b ₁ , c ₁ ,
d ₁ are stacked in the axial direction, and the conductor A of the first unit coil a ₁ , the conductor A of the first unit coil d ₁ , the conductor B of the first unit coil a ₁ , the conductor B of the first unit coil d ₁ , the first
The conductor A of the unit coil b ₁ and the conductor A of the first unit coil C ₁ and the conductor B of the first unit coil b ₁ and the conductor B of the first unit coil C ₁ are connected via internal crossover wires, and The conductor A of 1 unit coil d ₁ , the conductor A of 1st unit coil b ₁ , the conductor B of 1st unit coil C ₁ , and the conductor B of 1st unit coil a ₁ are connected via return crossover wires, respectively. High series capacitance winding 1st
The first winding units are stacked in the axial direction of the winding 6, and a plurality of conductor blocks are connected to the winding 6 at a portion located between both ends of the winding 6. are wound overlappingly in the radial direction to form a plurality of second unit coils a ₂ and b ₂ ,
These second unit coils a ₂ and b ₂ are stacked in the axial direction of the winding 6, and the conductor A of the second unit coil a ₂ , the conductor A of the second unit coil b ₂ , and the second unit coil a ₂
The conductor B of the second unit coil b 2 and the conductor B of the second unit coil b ₂ are connected via internal crossover wires, and the conductor A of the second unit coil b ₂ and the conductor A of the second unit coil a ₂ and the second unit coil b The conductor B of the _second unit coil a and the conductor B of the second unit coil _a2 are respectively connected via return crossover wires to form a plurality of high series capacitance winding second winding units, and these second winding units are In an induction electric device winding configured by stacking the winding 6 in the axial direction, each conductor block of the second winding unit is formed by stacking a plurality of same-potential wound conductors A and B in the radial direction of the winding 6. The conductors A and B of the conductor block are formed using conductors having a cross-sectional area approximately equal to the cross-sectional area of each conductor of the first winding unit and smaller than the radial dimension of the winding. A winding wire for induction electric appliances featuring: