JPH0140183Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to stationary induction equipment, and in particular, it has a high voltage winding and two low voltage windings that adjust the voltage independently, and the main magnetic flux is controlled by the difference in excitation rate. The present invention relates to static induction equipment, such as an independently regulated split-winding transformer, which incorporates a bypass core within a coil group to pass a differential.

Figures 1a and 1b show a conventional transformer of this type, in which a main core 1 has a high voltage winding 2 and two low voltage windings 3.
a, 3b are wound, high voltage winding 2 and low voltage winding 3
The two coil groups a and 3b are each surrounded by an insulator 4. A bypass core 6 is provided between these coil groups 5a and 5b for passing the difference in main magnetic flux.

In such a configuration, the bypass core 6 had to be stacked in the same manner as the main core 1 after the high-voltage winding 2, low-voltage windings 3a, 3b, and insulator 4 were assembled.

Therefore, the conventional type had drawbacks such as securing dimensional margin for carrying out the core stacking work, occurrence of dimensional errors due to the core stacking work, and requiring a large number of man-hours for the core stacking work.

This idea attempts to eliminate the drawbacks of the conventional ones as described above, and by configuring the bypass iron core to be attached to a support plate that is sandwiched between two coil groups, the bypass iron core can be placed inside the coil group. The object is to provide stationary guidance equipment that can be integrated all at once.

An embodiment of this invention shown in FIGS. 2a and 2b will be described below. In the figure, bypass core 6
is attached to a support plate 7 made of an appropriate material having substantially the same shape and dimensions as the opposing surfaces of the coil groups 5a and 5b, and is sandwiched between the two coil groups 5a and 5b in a sandwich-like manner. Ru.

With the above configuration, the transformer is assembled by attaching the support plate 7 to which the bypass core 6 is attached to the coil group 5.
The bypass core 6 may be placed between the coil groups 5a and 5b, and the main cores may be stacked around the bypass core 6.

As described above, according to this invention, it is possible to omit the core assembly work of the bypass core when assembling the transformer, and the bypass core and the coil group can be manufactured to a predetermined dimensional accuracy.

Although the above embodiment is a transformer with two low-voltage windings and a bypass core, it may also be applied to a main core between the phases of a normal three-phase transformer that does not have a bypass core, or a main core between phases of a reactor. A similar effect can be obtained even with an iron core.

[Brief explanation of the drawing]

Figure 1a is a schematic plan view of the conventional model, Figure 1b
2A is a partially enlarged plan sectional view thereof, FIG. 2A is a perspective view of a main part of an embodiment of this invention, and FIG. 2B is an exploded perspective view showing its arrangement. 1... Main iron core, 2... High voltage winding, 3a, 3b...
...Low voltage winding, 4...Insulator, 5a, 5b...Coil group, 6...Bypass core, 7...Support plate. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims for Utility Model Registration] Two coil groups each having a high voltage winding and two low voltage windings whose voltages are adjusted independently of each other; and a main iron core disposed between the two coil groups. A stationary induction device comprising: a bypass core forming a bypass passage for passing a difference in main magnetic flux passing through the bypass core; A stationary induction device characterized by being equipped with an iron core.