KR101198031B1 - Electromagnetic field shielding transformer which has the separation type of multiple magnetic field - Google Patents

Abstract

One embodiment of the present invention relates to an electromagnetic shielding transformer having a plurality of independent magnetic field space, the technical problem to be solved is to form each coil in a different independent magnetic field induction space to offset the leakage flux from each coil Therefore, this can improve the product efficiency.
One embodiment of the present invention for this purpose; A primary winding formed on an input end side of a transformer core connected to an external power supply side; A secondary winding formed on the output end side of the core for a transformer connected to the load side; A transformer comprising a first core housing and a second core housing independently accommodating the primary winding and the secondary winding, wherein the first and second core housings have a primary winding and the secondary winding. A core housing in which at least one through hole is formed to penetrate the core; And an electromagnetic field shielding transformer having a plurality of independent magnetic field spaces including an insulating spacer formed between the first core housing and the second core housing.

Description

ELECTROMAGNETIC FIELD SHIELDING TRANSFORMER WHICH HAS THE SEPARATION TYPE OF MULTIPLE MAGNETIC FIELD}

One embodiment of the present invention relates to an electromagnetic shielding transformer having multiple independent magnetic field spaces.

In general, an inductor is a device used in a power converter such as a television, a radio, a communication device, and the like, and can be used as a rectifier to stabilize a current because it can convert voltage or current to another value. It can also be used as a transformer to move up and down.

The basic configuration of such an inductor is a coil wound in a spiral shape such as a copper wire. Some core coils have nothing inside, but a coil wound around an iron core or a solidified iron powder is better than a core coil. The properties of large coils can be achieved, and these coils can be one or two paired.

A typical inductor configuration is a pair of coils consisting of a primary coil and a secondary coil, each of which is wound around two cores or cores with a copper wire, thereby changing the number of turns of the coil and changing the voltage in the primary coil and the secondary. The voltage at the coil can be changed.

Magnetic material is used as the core or core, and silicon steel, permalloy, ferrite, etc. are used depending on the use, and there are various types of cores that surround the coil. It's in the coil.

As described above, in the transformer using the conventional coil, the magnetic flux induced in the primary coil is not completely coupled to the secondary coil and leaks to some outside to generate inductance.

Therefore, in order to reduce the leakage inductance, an insulator, such as a gap paper, is formed between the primary coil and the secondary coil to make a gap. However, in this case, the magnetic flux may escape through the gap and the leakage inductance may be increased. there was.

According to an embodiment of the present invention, an electromagnetic shielding transformer having multiple independent magnetic field spaces may be formed in different independent magnetic field induction spaces to offset leakage flux from each coil, thereby improving product efficiency. To provide.

In addition, an embodiment of the present invention provides an electromagnetic shielding transformer having a plurality of independent magnetic field spaces to shield the electrostatic induction of each coil to improve the heat radiation efficiency.

Electromagnetic shielding transformer having a plurality of independent magnetic field space according to an embodiment of the present invention is a transformer core; A primary winding formed on an input end side of a transformer core connected to an external power supply side; A secondary winding formed on the output end side of the core for a transformer connected to the load side; A transformer comprising a first core housing and a second core housing independently accommodating the primary winding and the secondary winding, wherein the first and second core housings have a primary winding and the secondary winding. A core housing in which at least one through hole is formed to penetrate the core; And an insulating spacer formed between the first core housing and the second core housing, wherein the insulating spacer is formed to penetrate between the first core housing and the second core housing. An insulating hole having a predetermined width is formed in a direction parallel to the outer surface of the.

The insulating spacer may be an insulating partition wall having a predetermined width formed to be spaced apart in parallel with the outer surfaces of the primary winding and the secondary winding.

The insulating partition wall may be connected to a grounding facility through a ground terminal.

The insulating spacer may be formed to penetrate between the first core housing and the second core housing, and an insulating hole having a predetermined width may be formed in a direction parallel to the outer surfaces of the primary winding and the secondary winding. .

The insulating spacer may be formed with an insulating space such that an end portion adjacent to the first core housing and the second core housing is spaced apart from the inner wall of the first core housing and the second core housing at a predetermined interval.

An insulator may be inserted into and coupled to the insulating space.

The electromagnetic shielding transformer having a plurality of independent magnetic field spaces according to an embodiment of the present invention may form each coil in a different independent magnetic field induction space to offset the leakage flux from each coil, thereby improving product efficiency. Can be.

In addition, one embodiment of the present invention can improve the thermal radiation efficiency by shielding the electrostatic induction of each coil.

1 is a perspective view showing an electromagnetic shielding transformer having a plurality of independent magnetic field spaces according to an embodiment of the present invention.
2A is a side view of an electromagnetic shielding transformer having multiple independent magnetic spaces according to an embodiment of the present invention.
FIG. 2B is a top view illustrating another embodiment of the insulating spacer of the multiple independent magnetic spaces of FIG. 1.
FIG. 3 is a cross-sectional view of the electromagnetic shielding transformer in a state of cutting the AA line of FIG. 2.
4 is a cross-sectional view illustrating another embodiment of the electromagnetic shielding transformer in a state in which the AA line of FIG. 2 is cut away.
5 is a cross-sectional view illustrating an electromagnetic shielding transformer having multiple independent magnetic spaces according to another exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which those skilled in the art can readily implement the present invention.

1 is a perspective view showing an electromagnetic shielding transformer having a plurality of independent magnetic field spaces according to an embodiment of the present invention, Figure 2a is a side view of an electromagnetic shielding transformer having a plurality of independent magnetic field spaces according to an embodiment of the present invention. FIG. 2B is a top view illustrating another embodiment of the insulating spacer of the multiple independent magnetic spaces of FIG. 1, FIG. 3 is a cross-sectional view of an electromagnetic shielding transformer taken along line AA of FIG. 2, and FIG. 4 is FIG. It is sectional drawing which shows another Example of the electromagnetic shielding transformer of the state which cut | disconnected AA line of this.

As shown in Figures 1 to 3, the electromagnetic shielding transformer 10 having a plurality of independent magnetic field spaces according to an embodiment of the present invention is the transformer core 100, the primary winding 110, the secondary winding 120, core housing 130, and insulating spacer 160.

The transformer core 100 may be a magnetic powder core, that is, a core made of a metal alloy in the form of magnetic powder or a core including ferrite. The core 100 is a metal material having a high permeability, and means a metal provided inside the winding in which the wire is wound to help form magnetic flux density or magnetic field. Here, the core made of a metal in the form of magnetic powder is a high permeability alloy having a composition of aluminum (Al; about 5%), silicon (Si; about 10%), and iron (Fe; about 85%). Including cores made of alloys well known under the trade name Magnetics (kool-μ). The magnetic powder core has a low permeability compared to the ferrite core to be described later has the advantage of excellent current overlap characteristics. In addition, the ferrite core is an insulator including a magnetic material sintered by mixing iron oxide with zinc oxide, manganese oxide, nickel oxide, and the like, and has a high permeability and excellent loss characteristics. In addition, it is easy to make a variety of shapes when sintering is widely used as a magnetic core.

On the other hand, when the coil is wound around the coil core 100 as described above and a current is applied, a magnetic field is induced by the electric field, and magnetic flux is generated in the core. It is desirable to maintain a constant relationship with the current while the magnetic flux density exhibiting magnetism increases in proportion to the applied current and the core reaches a saturation state in which the magnet is lost. The correlation of the magnetic flux density with the current is called the current overlapping characteristic, and when the magnetic flux density increases too rapidly with the increase of the current to reach a saturation state, it is determined that the current overlapping characteristic is not good. In other words, if the core is easily saturated even with a small current change, it is difficult to use it as an electronic device. Therefore, it is preferable that the core has a good current overlapping property because the magnetic flux density is appropriately increased according to the change of the current.

The permeability (μ) is an amount representing the magnetic properties of a specific material and is also referred to as a magnetic induction capacity or magnetic permeability. It refers to the ratio of magnetic flux flux density generated when a material is magnetized by the magnetic field and the magnetic field strength in vacuum. In ordinary materials, that is, paramagnetic or diamagnetic materials, the magnetic permeability is close to 1, and the value is determined according to the type of the material. The value changes depending on the magnetic history of the magnetic body or the strength of the magnetic field. The higher the permeability, the more magnetic and easily affected by the magnetic field.

The primary winding 110 is formed on the input end side of the transformer core 100 connected to the external power side. The primary winding 110 may be made of a double winding in the inner winding and the outer winding sequentially wound in the outer direction from the surface of the transformer core 100.

The secondary winding 120 is formed at the output end side of the transformer core 100 connected to the load side. That is, the secondary winding 120 has a configuration similar to that of the primary winding 110, and is positioned to face the primary winding 110 so as to face the output winding side of the transformer core 100 connected to the load side. Is formed. In addition, the secondary winding 120 may be made of a double winding in the inner winding and the outer winding sequentially wound in the outer direction from the surface of the transformer core 100.

The core housing 130 is made of a magnetic metal and accommodates the primary winding 110 and the secondary winding 120. The core housing 130 includes a first core housing 140 and a second core housing 150 that independently receive the primary winding 110 and the secondary winding 120. The first core housing 140 and the second core housing 150 are formed to independently surround the primary winding 110 and the secondary winding 120, respectively. Accordingly, in the first core housing 140 and the second core housing 150, a magnetic field induced in the induction space of each of the primary winding 110 and the secondary winding 120 has a circulating current in each core housing. By being consumed in the form, it is possible to maintain a uniform magnetic field therein.

The first core housing 140 and the second core housing 150 are insulated through insulating spacers 160, which will be described later, to form independent induction spaces, respectively. In addition, the insulating spacer 160 blocks the circulating current according to the induced magnetic field in the first core housing 140 and the second core housing 150 through the grounding facility. In addition, the first core housing 140 and the second core housing 150 have at least one through hole so that the core 100 for the transformer in which the primary winding 110 and the secondary winding 120 are formed passes therethrough. 131 is formed. The first core housing 140 and the second core housing 150 have a seating groove 162 on which the core 100 for the transformer passing through the through hole 131 is seated. Therefore, the seating groove 162 serves to fix the core 100 for the transformer passing through the through hole 131.

In general, most transformers induce electrostatic induction by the coil and the core and the capacitance between the coil and the coil. The electrostatic induction generated by the electrostatic induction thus causes the transmission of surges, electromagnetic waves and noise, resulting in damage to the transformer. This will damage the load. Conventionally, in order to solve this problem, an electrostatic shielding plate is installed between the primary winding 110 and the secondary winding 120, but in this case, the primary winding 110 is increased due to an increase in the ground potential of the secondary winding 120. There was a disadvantage that an accident could occur on the side. In the present invention, by separating the magnetic field induction space formed by the primary winding 110 and the secondary winding 120 using the insulating spacer 160 to be described later, the above problem can be easily solved.

The insulating spacer 160 is an insulating material and has a predetermined width between the first core housing 140 and the second core housing 150 to insulate the first core housing 140 and the second core housing 150 from each other. It is formed to have. Here, both sides of the insulating spacer 160 may be formed to be spaced apart from the primary winding 110 and the secondary winding 120 at predetermined intervals. That is, the insulating spacer 160 serves to separate the first core housing 140 and the second core housing 150 so as to be spaced apart from each other. The insulating spacer 160 may be formed of an insulating partition wall or an insulating hole to be described later. In addition, as shown in FIG. 2B, the insulating spacer 160 has an end portion adjacent to the first core housing 140 and the second core housing 150 at the first core housing 140 and the second core housing. The insulating space 161 may be formed to be spaced apart from the inner wall of the 150 by a predetermined interval. The insulating space 161 may be formed at both ends or one end portion adjacent to inner walls of the first core housing 140 and the second core housing 150. Although not shown, a predetermined insulator may be inserted into and coupled to the insulating space 161 to insulate the first core housing 140 and the second core housing 150 from each other. Therefore, in the present invention, the first core housing 140 and the second core housing 150 can be separated into independent magnetic field induction spaces through the insulating space 161 and the insulator.

As illustrated in FIG. 3, the insulating spacer 160 may be an insulating partition wall having a predetermined width formed to be parallel to the outer surfaces of the primary winding 110 and the secondary winding 120. The insulating partition wall may be formed of an insulating material. That is, the electromagnetic shielding transformer 10 having a plurality of independent magnetic field spaces according to an embodiment of the present invention is a core housing 130 made of a magnetic metal to the first core housing 140 and the second core housing 150. The electromagnetic shielding transformer 10 having a redundant structure is fabricated, and the first core housing 140 and the second core housing 150 are spaced apart from each other by using an insulating partition formed of an insulating material to form an independent magnetic field induction space. Done.

In addition, the electromagnetic shielding transformer 10 having a plurality of independent magnetic field spaces according to an embodiment of the present invention may be designed so that the insulating partition wall is electrically connected to the grounding facility through the ground terminal. Due to the grounding facility, the induced magnetic fields in the first core housing 140 and the second core housing 150 are extinguished by the inductive circulating current. That is, in the electromagnetic shielding transformer 10 having a plurality of independent magnetic field spaces according to an embodiment of the present invention, the first core housing 140 and the second core housing 150 have an equipotential by being grounded by a ground terminal. In this case, the first core housing 140 and the second core housing 150 made of magnetic metal cancel the Faraday effect, thereby shielding the induced magnetic field, and further, the first core housing 140 and the second core. By insulating the housing 150 from each other, the circulating current circulated in the first core housing 140 and the second core housing 150 may be essentially canceled out.

In addition, the electromagnetic shielding transformer 10 having a plurality of independent magnetic field spaces, each of the coil and the insulating partition through the insulating partition 160 adjacent to each of the coils of the primary winding 110 and the secondary winding 120. Capacitive C1 and C2 generated in the gap between the outer walls of the 160 may be attenuated to obtain an electrostatic shielding effect, thereby improving thermal radiation efficiency. In addition, the electromagnetic shielding transformer 10 having multiple independent magnetic field spaces according to an exemplary embodiment of the present invention may reduce electromagnetic leakage to the outside.

On the other hand, the electromagnetic shielding transformer 20 having a plurality of independent magnetic field spaces according to another embodiment of the present invention, as shown in Figure 4, and the outer surface of the primary winding 210 and the secondary winding 220 Insulating holes 260 having a predetermined width may be formed to be spaced apart in parallel. That is, the insulation hole 260 is formed to penetrate between the first core housing 240 and the second core housing 250, and is parallel to the outer surfaces of the primary winding 210 and the secondary winding 220. It can be formed in the direction. The insulating hole 260 may include the first core housing 240 and the second core housing 250 such that internal spaces of the first core housing 240 and the second core housing 250 are formed as independent magnetic field induction spaces. It serves to insulate between.

Accordingly, the electromagnetic shielding transformer 20 having a plurality of independent magnetic field spaces according to another embodiment of the present invention forms an insulation hole 260 having a predetermined width between the first core housing 240 and the second core housing 250. It may be formed to offset the leakage magnetic flux generated from the coil of the primary winding 210 and the secondary winding 220 surrounded by the first core housing 240 and the second core housing 250 to be naturally resolved. have.

In addition, the electromagnetic shielding transformer 20 having a plurality of independent magnetic field spaces according to another embodiment of the present invention may provide an insulation hole 260 adjacent to each of the coils of the primary winding 210 and the secondary winding 220. Through the reduction of the capacitance (C1 ', C2') generated in the gap between the coil and the outer wall of the insulating hole 260 can obtain the electrostatic shielding effect, thereby improving the thermal radiation efficiency. Additionally, the electromagnetic shielding transformer 20 having multiple independent magnetic field spaces according to the embodiment of the present invention can reduce the electromagnetic leakage to the outside.

Meanwhile, the electromagnetic shielding transformer having a plurality of independent magnetic field spaces according to the embodiments of the present invention shown in FIGS. 1 to 4 has been described by taking a single phase transformer structure having only a primary winding and a secondary winding as an example. The invention is not limited to this, but may be applied to a three-phase transformer having two or more windings shown in FIG.

5 is a top view illustrating an electromagnetic shielding transformer having multiple independent magnetic field spaces according to another exemplary embodiment of the present invention.

As shown in FIG. 5, the electromagnetic shielding transformer 30 having multiple independent magnetic field spaces according to another embodiment of the present invention includes a core 300 for the transformer, a primary winding 310, and a secondary winding. 320, the tertiary winding 330, the core housing 340, and the insulating spacers 381 and 382.

That is, the electromagnetic shielding transformer 30 having a plurality of independent magnetic field spaces according to another embodiment of the present invention has a primary winding 310, a secondary winding 320, and a tertiary winding each having two windings formed therein. A first core housing 350, a second core housing 360, and a third core housing 370 are formed to enclose the portion 330, and the first core housing 350, the second core housing 360, and the first core housing 350 are formed. Insulation spacers 381 and 382 are formed between the three core housings 370.

Therefore, according to the electromagnetic shielding transformer 30 having a plurality of independent magnetic field spaces according to another embodiment of the present invention configured as described above, the primary winding 310, the secondary winding 320 and the third winding Each coil of the unit 330 may be separated from each other by the first and second core housings 350, 360, and the third core housing 370, and the insulating spacers 381 and 382 formed therebetween. By forming the magnetic field induction space, the leakage magnetic flux from each coil can be canceled, and the electrostatic induction of each coil can be shielded to improve the thermal radiation efficiency.

What has been described above is only one embodiment for implementing an electromagnetic shielding transformer having a plurality of independent magnetic field spaces according to the present invention, the present invention is not limited to the above embodiment, as claimed in the following claims As described above, any person having ordinary knowledge in the field of the present invention without departing from the gist of the present invention will have the technical spirit of the present invention to the extent that various modifications can be made.

10, 20, 30: electromagnetic shielding transformer 100, 200, 300: core for transformer
110, 210, 310: Primary winding 120, 220, 320: Secondary winding
130, 340: core housing 131: seating groove
140, 240, 350: first core housing 150, 250, 360: second core housing
160, 381, 382: insulating spacer 162: seating groove
260: insulation hole 310: primary winding
320: secondary winding 330: tertiary winding
370: third core housing

Claims (6)

Core for transformer;
A primary winding formed on an input end side of a transformer core connected to an external power supply side;
A secondary winding formed on the output end side of the core for a transformer connected to the load side;
A transformer comprising a first core housing and a second core housing independently accommodating the primary winding and the secondary winding, wherein the first and second core housings have a primary winding and the secondary winding. A core housing in which at least one through hole is formed to penetrate the core; And
An insulating spacer formed between the first core housing and the second core housing,
The insulating spacer is formed to penetrate between the first core housing and the second core housing, and an insulating hole having a predetermined width formed in a direction parallel to the outer surfaces of the primary winding and the secondary winding may be formed. Electromagnetic shielding transformer having a plurality of independent magnetic field space, characterized in that. The method of claim 1,
The insulating spacer may be an insulating barrier having a predetermined width formed so as to be spaced apart in parallel with the outer surface of the primary winding and the secondary winding. The method of claim 2,
The insulation barrier is electromagnetic shield shield having a plurality of independent magnetic field space, characterized in that connected to the grounding equipment through a ground terminal. delete The method of claim 1,
The insulating spacer may be formed with an insulating space such that an end portion adjacent to the first core housing and the second core housing is spaced apart from the inner wall of the first core housing and the second core housing at a predetermined interval. Electromagnetic shielding transformer with multiple independent magnetic spaces. The method of claim 5,
Electromagnetic shielding transformer having a plurality of independent magnetic field space, characterized in that the insulator is coupled to the insulating space.

Images