JPH0585023U - Winding structure of transformer - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a winding structure for a transformer that is optimal for miniaturization. [Structure] At the end of the coil, the first layer is wound 6 times in the winding axis direction of the coil, and then, from the second layer to the fourth layer, the number of windings of the layer to be wound. The winding start coil portion is formed such that the end portions are aligned one by one less than the winding start coil portion, and the winding start coil portion or adjacent layers of adjacent windings are wound. A diagonally wound coil portion formed by winding a winding wire in the winding circumferential direction of the coil is formed so as to be adjacent to a line, and the diagonally wound coil portion is connected to the diagonal winding coil portion of each layer in which a winding space exists. A winding end coil portion is formed so as to be adjacent to the winding and is wound in the winding circumferential direction of the coil.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a winding structure of a transformer, and in particular, a winding structure of a transformer that can make the distribution voltage of each part of the secondary winding uniform and downsize the transformer. It is related to.

[0002]

[Prior Art]

 Generally, a transformer plays a role of transforming the voltage on the primary side into a required voltage, but the voltage on the secondary side is made lower than that on the primary side except for special cases. The voltage output from the secondary side of the transformer is determined by the voltage applied to the primary side and the turns ratio of the coils wound around the primary side and the secondary side, respectively. Therefore, in a transformer that transforms a high voltage into a low voltage, the number of turns of the coil on the secondary side becomes considerably large. If the number of turns on the secondary side is large, the inductance of the coil on the secondary side will increase as a result, which may occur at the start and end of voltage application to the transformer, and also due to current fluctuations on the secondary side. A considerably high voltage may be generated between the winding start point and the winding end point of the coil. When such a high voltage is generated, an arc discharge is generated to cause a dielectric breakdown between lines or phases. In order to eliminate the occurrence of such a problem, conventionally, for example, as shown in FIG. 1, the secondary side coil is changed in position every predetermined number of times, that is, it is divided and wound, and the boundary portion is divided. Is to form an insulating layer, or, as shown in FIG. 2, the secondary coil is changed in layers through the insulating layer every predetermined number of times, that is, divided into layers and wound. .. With such a winding structure, the voltage induced by the above causes is divided and shared by each insulating layer interposed in the coil. Occurrence can be avoided.

[0003]

[Problems to be solved by the device]

 However, in the conventional transformer that adopts such a winding structure, in which the coil is divided and wound as described above, the volume occupied by the insulating layer that insulates the divided boundary is The ratio is extremely large, for example, the ratio of that portion occupies 30 to 50% of the volume of the transformer, and it can be said that the winding structure is extremely disadvantageous for downsizing. Also, it can be said that the coil that is divided into layers and wound is slightly more advantageous than the coil that is divided and wound, but the production process is very complicated. There is. Therefore, it can be said that none of the conventional winding structures are suitable for miniaturization. The present invention has been made in view of the above conventional problems, and an object thereof is to provide a winding structure of a transformer that is most suitable for miniaturization.

[0004]

[Means for Solving the Problems]

 The present invention for achieving the above-mentioned object has a winding structure on a primary side or a secondary side of a transformer, in which the number of times of winding in the winding circumferential direction of a coil wound on the primary side or the secondary side is set. When the number is N, at the end of the coil, the first layer is wound N + 1 in the winding axis direction of the coil, while the second layer to the N-1th layer are wound. A winding start coil portion is formed by winding the ends so that the end portions are aligned one by one less than the number of winding times of each layer, and the winding start coil portion is connected to the winding start coil portion. An oblique winding coil portion is formed by winding the winding in the winding circumferential direction of the coil so as to be adjacent to the winding start coil portion or the winding of each layer of the adjacent windings. Winding in each layer where winding space exists, connected to the diagonal winding coil section Wherein the coil unit winding end configured winding winding circumferential direction of the coil so as adjacent wound is formed. Further, the coil on the primary side is wound around the outer circumference of the coil on the secondary side via an insulating layer.

[0005]

[Action]

 In the present invention configured as described above, since the coil on the secondary side is wound obliquely as described above, the voltage applied between the windings is not so large, and there is no fear of arc discharge. .. In other words, the same effect as that of the conventional split or split winding structure can be obtained.

[0006]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 3 is an equivalent circuit diagram of a transformer having a winding structure according to the present invention. As shown in the figure, the transformer of the present invention has a winding structure different from that of a general transformer, but its equivalent circuit is the same as that of a general transformer. FIG. 4 is a sectional view of a winding portion of a transformer having a winding structure according to the present invention. As shown in the figure, what is exemplified in this embodiment is a type in which a secondary low-voltage winding and a primary high-voltage winding are wound around the same iron core. The secondary winding 302 is directly wound around the iron core 304. Further, the primary winding 301 is superposed on the secondary winding 302 with an insulating layer 303 interposed therebetween.

The secondary winding is wound in the following order in the process of manufacturing the transformer. In the figure, a winding structure having a 100-turn five-layer structure is illustrated for easy understanding. The numbers attached to the windings in the figure indicate the winding order of the windings. First, at the start of winding the secondary winding, the first to sixth windings are wound so as to be adjacent to each other in the axial direction of the iron core 304 as illustrated. Next, change the layers and lay them on the winding of the first layer wound, and from the 7th to the 11th winding, start winding of the 2nd layer as shown in the drawing. It is aligned at the beginning and wound adjacently in the axial direction. Thereafter, in the same manner, as shown in the drawing, winding is sequentially performed to form a winding start coil portion having five layers. However, the number of windings of the fifth layer and the fourth layer is the same. Next, the first layer to the fifth layer are sequentially overlapped and wound in the circumferential direction of the winding along the slope of the winding start coil portion. This is continuously performed up to the end of the iron core 304 to form a diagonally wound coil portion. Each of the diagonally wound single coils forming the diagonally wound coil portion is composed of four layers of windings. For example, the first diagonally wound coil wound adjacent to the winding start coil portion can be regarded as being composed of 20, 21, 22, 23, 24, 25, 26. It is considered that the diagonally wound single coil is formed by 22, 23, 24, and 25 of the winding. The second diagonally wound single coil located next to this consists of 27, 28, 29, 30. The fourteenth diagonally wound single coil consists of 87, 88, 89 and 90. Further, after reaching the end of the diagonally wound coil portion, the winding is performed in sequence as shown in the drawing according to the principle of diagonal winding to form an end-of-winding coil portion. After the winding of the secondary winding is completed as described above, the insulating layer 303 is formed on the outer peripheral portion of the formed secondary winding, and then the primary winding 301 is wound.

In the secondary winding formed by winding in this way, the number of adjacent windings does not exceed 5, and in particular, the winding wound diagonally is as shown in the drawing. Since there are 14 windings, this has the same effect as that of the conventional split winding in which 14 insulating layers are provided in the total of 70 windings. Also, the winding end coil portion can be regarded as being divided into two pieces. As described above, according to the winding structure of the present invention, an insulating layer for division as in the conventional case is not necessary, so that the volume required for the insulating layer and the transformer can be downsized. Moreover, since the winding structure is not complicated, it is possible to contribute to improvement in productivity and cost reduction. In this embodiment, the winding structure of the transformer with 100 turns is illustrated, but the present invention is not limited to this, and the number of turns may be any as long as the idea of the present invention can be applied. Needless to say, it can be applied.

[0009]

[Effect of the device]

 As is clear from the above description, according to the present invention, it is possible to reduce the size and cost of the transformer.

[Brief description of drawings]

FIG. 1 is a diagram showing a split-type winding structure in a conventional transformer.

FIG. 2 is a diagram showing a split-layer winding structure in a conventional transformer.

FIG. 3 is an equivalent circuit diagram of a transformer having a winding structure according to the present invention.

FIG. 4 is a sectional view of a transformer having a winding structure of the present invention.

5 is a diagram for explaining a winding order of the winding structure shown in FIG.

[Explanation of symbols]

 301 ... Primary winding 302 ... Secondary winding 303 ... Insulating layer 304 ... Iron core

Claims (2)

[Scope of utility model registration request] 1. A primary side or secondary side winding structure of a transformer, wherein the number of windings in the winding circumferential direction of a coil wound on the primary side or secondary side is N layers, At the end of the coil, the first layer is N in the winding axis direction of the coil.
On the other hand, the second layer to the (N-1) th layer are wound so that the end portions are aligned one by one less than the number of windings of the layer to be wound. A winding start coil portion is formed, and the winding start coil portion is connected to the winding start coil portion so as to be adjacent to the winding start coil portion or a winding of each layer of adjacent windings, and An oblique winding coil portion is formed by winding a winding wire around the winding wire, and the winding circumference of the coil is connected to the diagonal winding coil portion so as to be adjacent to the winding wire of each layer in which a winding space exists. A winding structure for a transformer, characterized in that an end-of-winding coil portion formed by winding a winding in a direction is formed. 2. The winding structure for a transformer according to claim 1, wherein the coil on the primary side is wound around an outer periphery of the coil on the secondary side via an insulating layer.