JPH07320947A - Core for orthogonal transformer and orthogonal transformer composed thereof - Google Patents

Abstract

PURPOSE:To reduce the thickness of an orthogonal transformer by providing a pair of protruded sections having a prescribed width and length on the side face of one side leg of a Ushaped core opposite to the side face of the side leg facing the other side leg of the core in parallel with the extending direction of the side leg. CONSTITUTION:An orthogonal transformer is constituted of one first bobbin 3 for control winding, four cores 7, and one second bobbin 10 for main winding. The ferrite core of the transformer is constituted by combining the cores 7 respectively having protruded sections 5 protruded in the longitudinal direction with a center leg 6. The first bobbin 3 is composed of a core 1 and flanges 2 and put on the protruded section 5 of the center leg 6 of the core 7. The second bobbin 10 is composed of a core 8 and flanges 9 and put on the center leg 6. Therefore, this transformer can have the same thickness as that of the conventional. transformer using an E-shaped core and the same characteristics as those the conventional orthogonal transformer using a U-shaped core has.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core used in a quadrature transformer and a quadrature transformer including the core.

[0002]

2. Description of the Related Art With the development of electronic technology in recent years, electronic devices are becoming smaller and smaller, and therefore thinner transformers are required.

A conventional orthogonal transformer is constructed by combining two U-shaped orthogonal transformer cores 18 as shown in FIG. 5, or by combining one core 18 and one core having four magnetic legs. 6, the primary winding 11, the secondary winding 12 and the control winding 13 are provided so that the primary winding 11 generates a magnetic field 14 and the control winding 13 generates a magnetic field 15. It However, there is a problem in that it is larger in shape than the transformer in which the E-shaped core 16 and the bobbin 17 are combined as shown in FIG. 4, and the mounting height of the printed circuit board to be mounted becomes high.

[0004]

An object of the present invention is to reduce the thickness of a quadrature transformer.

[0005]

According to the present invention, (1) a protrusion having a predetermined width and length is provided on a side surface of a U-shaped core on the side opposite to the side facing the other side leg. , A pair of orthogonal transformers provided in parallel to the extending direction of the side legs, and (2) an E-shaped core formed by combining split cores with a further J-shaped core An orthogonal transformer using a core, wherein at least one of the U-shaped cores is used as a split core, and the side leg provided with the protrusion is E
An orthogonal transformer characterized in that a first bobbin is inserted into the projecting portion and a second bobbin is inserted into the central leg and the first bobbin in combination so as to form a central leg of the mold core. Is.

[0006]

The present invention, by using the core with a protrusion,
A winding for generating an orthogonal magnetic field can be housed in the second bobbin of the central leg of the core. Further, it has the same performance as that of the conventional orthogonal transformer, and the thickness of the core can be reduced, so that the thickness can be reduced.

[0007]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an exploded perspective view of the core and bobbin of the present invention. As shown in FIG. 1, the quadrature transformer of the present embodiment includes one first bobbin 3 for the control winding, four cores 7 and one second bobbin 10 for the main winding. To be done.

The ferrite core of the present invention comprises Fe, Mn,
The Zn raw material is produced by a powder metallurgy method according to a conventional method, and is constituted by combining four cores 7 each having a protrusion 5 in the longitudinal direction with a central leg 6.

The first bobbin 3 is composed of a winding core 1 and a collar 2, and is inserted into the projecting portion 5 of the central leg 6. In this case, the outside of the collar 2 has a size that does not protrude from the side surface of the core 7. The second bobbin 10 is composed of a winding core 8 and a collar 9, and is inserted into the central leg 6 of the core 7.

In the assembly of the transformer, when the cores are combined, the core joint surface 4 is matched with the joint surface 4 of the core 7 facing each other, and the joint surface of the protrusion 5 is the joint surface of the protrusion 5 opposed to each other. It will be in a state that matches.

FIG. 2 is an external perspective view of the core and bobbin of the present invention after assembly. Further, an explanatory view of the orthogonal transformer of the present invention is shown in FIG.

In FIG. 2, the first bobbin 3 has a protrusion 5
The second bobbin 10 is inserted into the central leg 6 of the core 7. The size is the same as that of the conventional E-shaped core as shown in FIG. With such a structure, as shown in FIG. 3, the magnetic field 14 generated from the primary winding 11 and the magnetic field 15 generated from the control winding 13 are orthogonal to each other in the state of the orthogonal transformer. Further, when compared with the conventional orthogonal transformer shown in FIG. 6, the same operation is shown.

If the effective cross-sectional areas of the orthogonal transformer core of the present invention shown in FIG. 2 and the conventional orthogonal transformer core shown in FIG. It can be thinned to half the thickness of the U-shaped core. Further, when manufacturing the orthogonal transformer, by using the first bobbin 3 and the second bobbin 10 shown in FIG. 1, the assembly workability can be improved and a highly reliable product can be obtained.

The secondary winding 12 shown in FIGS. 3 and 6 is omitted when it is used as a coil.

[0015]

As described above, by using the orthogonal transformer core of the present invention, it becomes as thin as the transformer using the conventional E-type core, and the orthogonal transformer using the conventional U-type core. It has the same characteristics as.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a core and a bobbin of the present invention.

FIG. 2 is an external perspective view of the core and bobbin of the present invention after assembly.

FIG. 3 is a perspective view illustrating an orthogonal transformer according to the present invention.

FIG. 4 is an external perspective view of a conventional E-shaped core and bobbin after assembly.

FIG. 5 is an external perspective view of a conventional orthogonal transformer core.

FIG. 6 is a perspective view for explaining a conventional orthogonal transformer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 core (for control winding) 2 collar (for control winding) 3 1st bobbin (for control winding) 4 core joint surface 5 protrusion part 6 central leg 7 core 8 core (for main winding) 9 Tsuba (for main winding) 10 Second bobbin (for main winding) 11 Primary winding 12 Secondary winding 13 Control winding 14 Magnetic field generated by primary winding 15 (Control winding generated) Magnetic field 16 E type core 17 Bobbin (for E type core) 18 (U type) core

Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location 7522-5E H01F 31/00 A 7522-5E U

Claims (2)

[Claims] 1. A pair of protrusions having a predetermined width and length are provided on the side surface of the U-shaped core opposite to the side facing the other leg in the extending direction of the side leg. A core for an orthogonal transformer, which is characterized in that 2. An E-shaped core formed by combining split cores,
An orthogonal transformer using a date-shaped core formed by combining other cores, wherein at least one U-shaped core according to claim 1 is used as a split core, and the side leg provided with the protrusion is an E-shaped core. The orthogonal transformer, wherein the first bobbin is inserted into the protruding portion, and the second bobbin is inserted into the central leg and the first bobbin.