JPS5961021A - Leakage type transformer - Google Patents

Abstract

PURPOSE:To realize excellent working efficiency and accurately locate a path core by opposingly arranging the cores with the center legs engaged with the recessed parts of path cores. CONSTITUTION:The center legs of main cores 11, 12 are engaged with the recessed parts 7, 8 of path core 6 and the path core 6 is held between the center legs. Such assembling work is very simple and moreover the path core 6 can be located accurately to the main cores 11, 12. Moreover, since the path core 6 is only provided with the recessed portions 7, 8 at both sides, it is no longer necessary to form a particularly complicated path core 6. In case both ends of recessed portions 7, 8 of path core 6 are open, the recessed portions 7, 8 can be polished rather easily.

Description

[Detailed description of the invention] This invention relates to a leaky transformer made without an inventive bus core.

Generally, in a leaky transformer having a bus core, it is required to accurately position the bus core and to simplify assembly. In contrast, in the past, the bus 17 was simply placed between the input winding and the output winding and glued together, making assembly work difficult and making accurate positioning difficult. there were. As for other conventional techniques, for example, as shown in Jitto Publication No. 150459/1984, a method in which a bass core storage section is formed in the reel frame has been proposed, but this method uses a reel with a special structure. A frame is necessary. Further, since the winding frame is used with dimensions that have a certain margin with respect to the core, the position of the bus core with respect to the core may not always be accurate.

The present invention has been made in order to solve the above-mentioned conventional problems, and provides a leaky transformer that allows accurate positioning of the bus core, has good assembly workability, and does not require a special winding frame. The purpose is to

In the present invention, a pair of main cores each having a center leg and a side leg and having a figure-eight cross section are disposed opposite each other, and a bus core between the center legs of the pair of main cores is arranged, and further, the bass core is arranged between each of the central legs. The effl has a recessed portion 7 on the surface facing the front We, and the front We central leg is fitted into this recessed portion.

In the present invention, after the windings are attached to each main core, each central leg is fitted into the recess of the bus core and assembled by facing the opposite Q(,(PJ). However, since it is sufficient to form a concave part in the bass core, it does not become particularly complicated.In the present invention, it is noted that the pair of main cores have a figure-eight cross section. The E9 type-1a also has a long pot-shaped core, the side legs may be wider than the central legs, etc. Tehaferrite, amorphous, permalloy, silicon steel, etc. can be used.

Indeed, the leaky transformer according to the present invention can be used for high frequency applications such as an output transformer of an inverter that lights a discharge lamp at high frequency. When lighting a discharge lamp, the leakage inductance can be used as a current-limiting element for the discharge lamp.However, it is stated in Japanese Patent Application No. 131763/1983 that a leakage transformer for high frequencies can be constructed using a hash core. As shown in the figure, it is possible to reduce the eddy current loss and reduce the power loss of the entire transformer, and it also allows for greater freedom in design regarding the position of the windings, etc. However, the present invention is not limited to high frequency applications or discharge lamp lighting applications.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. (11) and (1,) are each required to have a main core, a central leg and side legs, and a figure-8 cross section. In this embodiment, it is an E-shaped core itself.

These main cores (1,) and (12) are arranged with their respective legs facing each other. An input winding (2) is wound around the center leg of one of the main cores (11) and (1t). (3) is the output winding of the main core 0+) and the other core (12) of (12).
) is wrapped around the central leg of the (4), i51 k*,
The input winding (31) is a hobbin used as appropriate for the output winding.Next, (61 is a bus core.This bus core (6) is attached to each central leg of the main core (it), (12). It is placed between.Furthermore, the bus core (6)
has recesses (7) and (8) on the surface facing each center leg, and the center legs are fitted into the recesses (7) and (8). In this example, the main cores (L), (12) and the bus core (6) are made of ferrite. In this embodiment, the main core (
A gap is formed between the customer side legs of 11) and (12), and a spacer (91, QQI) is interposed.

Next, the effect will be described. Each main core (11), (12)
Attach bobbins (4) and (5) formed by winding the input winding (2) and output winding (3) to the center leg of the main core (11).
, (12) are opposed to each other. At this time, the main core (
:t+), (12) are fitted into the respective recesses (7) and (8) of the bass core (6), and the bass core (
6) Clamp. In this case, the main core (11), (x2
) and the bus core (6) using an adhesive can be done as necessary. 'Also, in this embodiment, spacers (91, (+01) are used as main core (11
) and (12) are held between the side legs. Then, the main cores (11) and (xt) are integrated by means such as winding tape around the outer periphery. As described above, the assembly work is extremely simple, and the position of the bus core (6) relative to the main cores (it) and (12) is also accurate. Since only the recesses (7) and (81) are formed on both sides of the bass core (6), there is no need to make the bass core (6) particularly complicated. , recess M (71, (81) in which both ends are open, recesses (7), (8)
Polishing is also relatively easy. In this example, the height of the bass core (6) is defined as the main core (it).
It is also possible to form a recess that is higher than the center leg of (12) and can fit with the entire circumference of the center leg.

FIG. 3 shows another embodiment of the invention.

In FIG. 3, the windings are omitted. In this embodiment, the main cores (20+) and (202) are pot-shaped cores. The bass core (21) is formed into a disk shape, and has four parts (2]) on both sides (only the - side is shown). In this embodiment, the action of the main shaft ft12 is almost the same as in the embodiment described above.

As mentioned above, in the present invention, the shapes of the main core and the bus core can be modified within a range that does not deviate from the wicking characteristics of the present invention, but the dimensions of each core are determined depending on the required electrical properties, especially leakage inductance. It can be made into any value depending on the value, output voltage, pressure value, etc.

As described in detail below, the present invention has a pair of main cores having a central membrane and side legs and a figure-eight cross section, and a bass core is disposed between each of the middle legs. A recess is formed in the surface of the bass core facing the central leg of the main core, and the central leg is fitted into this recess, so the bass core can be attached without using a specially structured bobbin. It is possible to provide a leakage transformer that is easy to assemble and allows accurate positioning of the bus core.

4. I will explain the simple power of the first page [J Body 1 Shi 1ir J 1 Hon E! Part 9 showing examples of 11 fruitful journeys
One side is a front view, and FIG. 2 is a perspective view showing the core of the same embodiment.
FIG. 3 is an exploded oblique view showing the core of another embodiment.

(it) , (12) , (2n +) , (202)
・Ki, Cob, (2)...Input winding (3'・Output winding,
(6t, (21)...bass core, (7), (8),
(2+1...concavity.

Patent Applicant: Toshiba Eiri Co., Ltd. Agent Patent Attorney Kojitsu 1) Yoshihiro (Volunteer to write procedural amendments) 1. Display of the case 1982 Patent Application No. 171167 2 Name of the invention Leaky transformer 3 Relationship to the case of the person making the amendment Patent applicant 1-1-43 Shibaura, Minato-ku, Tokyo (375) Toshiba Electric Zai Co., Ltd. Sato Tai II Representative Dairoku Sato 4, Agent 210 Toshiba Electric Zai Co., Ltd. 72 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture 5, Horiyo Town Hall, Application to be amended and Specification 6, contents of amendment

Claims (1)

[Scope of Claims] (A pair of main cores having 11 central legs and side legs, each having a figure-eight cross section, with the legs facing each other; a wound input winding; an output winding wound around the central leg of the other E-shaped core of the main core; and a bus core disposed between the central legs of the pair of main cores; A leaky transformer, characterized in that the bus core 1d has a concave portion on a surface facing each central leg of the main core (2), and the central leg of the main core is fitted into the concave portion. (2) ) Claim (1) characterized in that the pair of main cores and the bus core are made of ferrite.
Leaky transformer as described.