JPS5826819B2 - Molded induction electric appliance - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molded induction electric appliance using a resin-molded coil.

Generally, a molded induction electric appliance, such as a molded transformer, is constructed by attaching a molded coil 10 molded with resin to an iron core leg 1, as shown in FIGS. 1 and 2.

This molded coil 10 uses a wound conductor such as a rectangular conductor or a band-shaped conductor, and is made of one coil wound a predetermined number of times, or a plurality of coils stacked in the direction of the winding axis and connected in series or parallel, for example. Manufactured by integral molding with epoxy resin.

These molded coils 10 are used by molding high-voltage and low-voltage coils simultaneously or separately as required.

In induction electric appliances such as transformers, in order to be able to adjust the voltage on the high-voltage side and low-voltage side, tap lead wires are pulled out from the specified number of turns of the high-voltage and low-voltage coils, and these are switched and adjusted using a switching device. That's what I do.

For this reason, in the molded coil 10, line terminals 11 and 12 connected to the coil are provided at predetermined locations on the outer surface of the resin molded portion as shown in FIGS. ) are buried, and the connection between the tap terminals 13 is changed by a switching plate 14, so that a predetermined high voltage or low voltage can be obtained between the line terminals 11 and 12.

The line terminals 11 and 12 and the tap terminals 13 embedded in the molded coil 10 are arranged as shown in FIG.
In some cases, tap terminals 13 are embedded in the same side surface, and in other cases, tap terminals 13 are embedded in the back side of line terminals 11 and 12, as shown in FIG.

Therefore, since there are two types of molded coils 10 even if they have the same electrical specifications, both types of casting molds are required.

In addition, there are various voltage specifications for the molded coil 10, and the coil height dimensions also vary depending on this.
You will need a casting mold that fits each height.

Therefore, in order to produce a molded coil, there is a problem that many types of casting molds must be prepared, which makes the production complicated and uneconomical.

In order to improve this, the molded coil to be attached to the core leg should be formed by stacking at least two molded coil units and electrically connect the connecting terminals between these molded coil units. However, there is a drawback that combinations cannot be easily performed unless the connecting terminals are properly arranged.

The purpose of the molded induction electric appliance of the present invention is to enable easy production of many types of molded coils even if the number of casting molds is reduced.

In order to achieve the above object, in the molded induction electric appliance of the present invention, a molded coil provided with line terminals and tap terminals is attached to the core leg, and this molded coil has at least two connecting terminals on the opposite side. When configuring molded coil units by stacking them and electrically connecting connection terminals between each molded coil unit, at least one molded coil unit is provided with a plurality of tap terminals and connection terminals, and the molded coil having the tap terminal unit or other molded coil units are provided with connection terminals on both the side surface where the tap terminal is provided and the back side thereof, and these molded coil units are characterized in that when stacked, the opposing connection terminals are electrically connected. That is.

Hereinafter, the present invention will be explained using the embodiments shown in FIGS. 3 and 4, in which parts that are the same as those of the prior art are denoted by the same reference numerals.

The molded coil 10 attached to the iron core leg 1 is configured as follows.

That is, the molded coil 10 is a stack of at least two molded main coil units 20, which are resin-molded coils without taps, and molded tap coil units 30, which are resin-molded coils that draw out a plurality of taps with tap lead wires. It consists of

In the example of the molded coil 10 shown in this drawing, two molded main coil units 20 and one molded tap coil unit 30 are combined to obtain a high voltage.
The main mold coil unit 20 is arranged above and below the mold tap coil unit 30 at the center, thereby obtaining a high voltage.

This molded main coil unit 20 includes a coil without a tap (not shown) wound with a conductor and a line terminal 11 or one
2 and a connecting terminal 21 or 22 are joined together, and this is assembled into a casting mold and molded with a resin.

Similarly, the mold tap coil unit 30 has a plurality of tap terminals 13 drawn out by tap lead wires on a coil in which a conductor is wound and a plurality of taps are provided, and connection terminals 31 and 32 are provided above and below.
are joined together and molded with resin.

Mold main and tap coil units stacked in the axial direction 20
．． 30 is arranged so that the connection terminals 21 and 31 and 22 and 32 correspond to each other above and below, and are connected using connection plates 41 and 42, so that the whole is used as one molded coil 10.

Therefore, it is only necessary to combine one or two main coil units 20 with a predetermined number of turns to a molded tap coil unit 30 with a fixed number of conductor turns, so as long as the tap drawer position or number of pieces is not changed, the casting It can be used for any voltage molded coil 10 without changing the type of use.

The mold coil 10 is one mold main coil unit 2
In the case of a combination of 0 and 1 mold tap coil unit 30, the connection terminal 32 at the lower end of the mold tap coil unit 30 is also used as the line terminal on the other side.

In the molded coil 10, the tap terminal 13 is provided on the lead-out side of the terminal 11.12 as shown in FIG. 3, and the tap terminal 13 is provided on the back side of the line terminal 11.12 as shown in FIG. Therefore, in this molded tap coil unit 30, connection terminals 31 and 32 are provided on the same side as the tap terminal 13, and connection terminals 31a and 32a are also provided on the side on the back side thereof.

In this way, the connection terminals 3L32 and 31a are also provided on the front side and the back side of the mold tap coil unit 30.

32a and connect the mold main coil and the connection terminals 21 and 22 of the unit 10 with the connection plate 4L42, even if it is necessary to change the pull-out position of the tap terminal 13, the same mold tap coil unit 30 The molded coil 10 can be manufactured extremely easily.

In the example of the above drawing, the mold tap coil unit is 30
Connection terminals 31, 32 and 31a, 3 are provided on both sides of the
2a, but instead of this, connection terminals corresponding to the connection terminals 31 may be provided in each mold main coil unit 20 on the front side and back side where the line terminals 11.12 are located. The effect can be distantly related.

The configuration of the molded coil 10 is not limited to the combination of the mold main and molded tap coils 20 and 30, but by combining only the molded tap coil 30, an induction electric appliance having two or more tap switching points and a large number of switching voltages can be obtained. be able to.

In this case, one connection terminal of the mold tap coil unit 30 is used as a line terminal.

By configuring a molded induction electric appliance as in the present invention, induction electric appliances with different voltages can be easily produced without the need for many types of resin molding dies, and at the same time, each molded coil unit Since the connection terminals are provided on either the front side and the back side, it can be used in common even if the 0 output direction of the line and tap terminals is different.
Manufacturing becomes even easier.

[Brief explanation of the drawing]

1 and 2 are perspective views showing different conventional molded induction electric appliances, FIG. 3 is a perspective view illustrating an embodiment of the molded induction electric appliance to which the present invention is applied, and FIG. 4 is a perspective view showing an embodiment of the molded induction electric appliance to which the present invention is applied. FIG. 7 is a perspective view showing another embodiment. 1... Iron core leg, 10... Molded coil, 11゜12... Line terminal, 13...
...Tap terminal, 14...Switching board, 20...
... Main coil unit, 21, 22° 31.32.31a
, 32a... Connection terminal, 30-tap coil unit, 41, 42... Connection plate.

Claims (1)

[Scope of Claims] 1. A wound conductor is resin-molded on the core leg, and a molded coil is installed on the outer surface thereof with a line terminal and a tap terminal that is switched and connected by a switching plate, and the molded coil is mounted on an opposite side. At least two molded coil units each having a connecting terminal on the side thereof are stacked and the connecting terminals of each molded coil unit are electrically connected to each other, and at least one of the molded coil units has a plurality of taps. A terminal is provided on one side and connection terminals are provided on the upper and lower sides, and the molded coil unit having the tap terminal or other molded coil unit is provided with connection terminals on both the side surface where the tap terminal is provided and the back side thereof. . A molded induction electric appliance, wherein each of the molded coil units is electrically connected between opposing connection terminals when stacked. 2. In claim 1, the molded coil is a molded coil unit having connection terminals above and below the molded coil unit having connection terminals on the same side and rear surface as the tap terminal, but having no tap terminal. A molded induction electric appliance characterized by the arrangement of.