JPH0343705Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" Concerning the coil structure of large capacity transformers.

``Prior art'' When the current capacity of a single strip of a large-capacity transformer strip coil is insufficient, conventional methods for increasing the cross-sectional area include wrapping the coil with multiple strips stacked one on top of the other, or
The method used was to wind the strip coils separately and then connect multiple coils in parallel.

``Problem that the invention aims to solve'' In coil winding by stacking multiple strips, the winding size becomes large and workability is poor. Furthermore, when the coil is divided into two or more strip coils, the routing of the connecting portions during assembly is complicated, and the connecting wires must be insulated, resulting in a lack of reliability.

"Means for Solving the Problem" A spacer with a U-shaped cross section is wound in the part where the tap is exposed in the winding of the strip coil to form a strip coil, and when assembling, the tap exit plate of the adjacent strip coil is attached to the spacer. Connect each coil by passing it inside.

``Operation'' The tap exit plate of the strip coil is assembled through the inside of the U-shaped spacer wound around the adjacent coil.

"Embodiments" Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a strip coil of a transformer to which the present invention is applied, and FIG. 2 is a diagram of the strip coil viewed from the axial direction.

A U-shaped spacer 2 as shown in FIG. 3 is wound around the tap portion of the strip coil 1a.

Here, 3a is a winding start plate, 4a is a winding end plate, and 5a is a tap outlet plate.

Moreover, 1b is an adjacent strip coil, and this outlet plate 3
b, 4b, and 5b are indicated by dotted lines. Here 3b
4b is the beginning of the winding, 4b is the end of the winding, and 5b is the tap.

Among the outlet plates of the strip coil 1b, 3b at the beginning of winding passes inside the strip coil 1a to the outlet plate 3a side of the strip coil 1a, and 4b at the end of winding passes through the outside of the strip coil 1a to the strip coil 1a. They are each drawn out to the exit plate 4a side of 1a.

Further, the tap outlet plates 5b of the strip coil 1b are respectively drawn out to the tap outlet plate 5a side of the strip coil 1a through the inside of the spacer 2 provided on the strip coil 1a.

In this way, the outlet plates of both strip coils can be connected to each other over the shortest distance without complicated routing.

In this embodiment, the spacer 2 is not wound around the strip coil 1b since there is no need to pass through the outlet plate, but from the viewpoint of dimensional control etc., the spacer 2 may be wound around all the strip coils.

If the spacer portion and the tap outlet plate passing through it are not at the same potential, the outlet plate may be insulated before being passed through the spacer.

"Effects of this invention" (1) The types of articles can be reduced.

(2) The finished outer diameter of the strip coil becomes smaller.

(3) Workability is good because the strip coil is divided and wound before being assembled.

(4) When the spacer part and the tap exit plate are at the same potential, insulation is not required.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is a view of the strip coil viewed from the axial direction, and FIG. 3 is a perspective view of the spacer. In the figure, 1a and 1b are strip coils, 2 is a spacer, and 3a, 3b, 4a, 4b, 5a, and 5b are outlet plates.

Claims (1)

[Scope of utility model registration request] A spacer with a U-shaped cross section was wound around the part where the tap was formed in the coil winding to form a strip coil, and when assembling, the tap opening plate of the adjacent strip coil was pulled out through the inside of the spacer to connect each coil. A large capacity transformer coil characterized by: