KR101570110B1 - Inductive Coupler - Google Patents

Abstract

The present invention relates to a non-contact type power communication coupler. The non-contact type power communication coupler includes a magnetic core material and an external case including a hole which stores the magnetic core material and enables a power line to pass through. The magnetic core material is configured to include magnesium-zinc (Mg-Zn) group ferrite. The non-contact type power communication coupler can ensure high performance and cost reduction. The non-contact type power communication coupler can reduce the costs for eliminating power line communication defects to reduce the communication network configuration cost and ensure easy installation to significantly reduce the working hours required to establish the power line communication network. The present invention enables power line communication even up to the maximum of 17mm diameter wires and 40A load currents while minimizing signal loss and ensuring easy installation, thereby enhancing stability. The present invention also prevents cable damage and the shaking of wires, thereby preventing noises by eliminating the fluctuation of the core.

Description

Inductive Coupler

The present invention relates to an inductive coupler for power line communication (PLC) in which a magnesium (Mg) -zinc (Zn) ferrite is applied as a core core material.

Generally, Power Line Communication (PLC) refers to a technology that can transmit a carrier signal such as internet signal or voice signal by using a high-speed Internet and a telephone connection with only 220V power line that we use.

In order to perform such power line communication, various signals such as an internet signal and a voice signal should be loaded on a power line or a signal should be drawn from a power line. For this purpose, a coupler for power line communication is used.

The power line communication coupler is classified into contact type and non-contact type. In the case of the contact type power line communication coupler, which removes the insulation coating of the power line, it is difficult to commercialize the power line communication coupler due to the stability and problems in the installation process. Therefore, the coupler for non-contact type power line communication is mainly used .

On the other hand, a conventional non-contact type coupler has been widely used, such as an inner diameter 13 mm inductive coupler and an inner diameter 18 mm inductive coupler. The former is mainly used when the lead wire thickness is less than 13 mm or the current amount is less than 30 A, and the latter is mainly used when the lead wire thickness is more than 13 mm or the current amount is more than 30 A.

However, such conventional non-contact type couplers have various problems. An inductive coupler using an inner diameter 13 mm ferrite core (Ni-Zn system) has a problem that communication can not be performed because the thickness of the incoming wire on the meter side exceeds 13 mm or the loss increases when the electric current of the wire exceeds 30 A, have.

In addition, the inductive coupler using the ferrite core (Ni-Zn system) having an inner diameter of 18 mm is expensive, and when a large amount of current flows, the core is shaken due to the magnetic force. Particularly, when there is a large difference between the core inner diameter (18 mm) and the wire thickness, there is a problem that the noise is more severely generated due to the fluctuation of the wire in the ferrite core.

Therefore, there is an urgent need to develop a non-contact type coupler for power line communications that complements such a problem. Such an example is one such as KR2010-0135018 and KR2009-0075488. However, there is no disclosure to solve the above-mentioned problems.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inductive coupler that can achieve high performance and cost reduction.

It is another object of the present invention to provide an inductive coupler that realizes reduction in the construction cost of a communication network due to cost reduction of power line communication failure.

Another object of the present invention is to provide a non-contact type coupler which is easy to install and realizes a significant reduction in work time for opening a power line communication network.

It is still another object of the present invention to provide an inductive coupler capable of power line communication with a maximum thickness of 17 mm and a maximum load current of 40 A.

It is still another object of the present invention to provide an inductive coupler that minimizes signal loss.

Another object of the present invention is to provide an inductive coupler which is easy to install and has increased stability.

It is still another object of the present invention to provide an inductive coupler capable of preventing wire shaking and cable damage.

It is still another object of the present invention to provide an inductive coupler in which noise is not generated because there is no core fluctuation.

The above and other objects of the present invention can be achieved by the present invention described below.

One aspect of the invention is a core core material; And an enclosure enclosing the core core material and including a hole through which a power line penetrates, wherein the core core material is magnesium (Mg) -Zn (Zn) ferrite.

In an embodiment, the core core material comprises 60 to 80 wt% iron oxide (Fe 2 O 3), 10 to 16 wt% zinc oxide (ZnO), 1 to 8 wt% manganese oxide (MnO), 1 to 16 wt% %, Copper oxide (CuO) 1 to 8 wt%.

In an embodiment, the core-core material may have a frequency of use ranging from 1 MHz to 50 MHz.

In an embodiment, the core core material may have a core inner diameter of 16 to 18 mm.

In an embodiment, the outer case has first and second ends formed with through-holes; And a side portion connecting the first and second ends, wherein at the first and second end portions, a latching chain for fixing the core magnetic core material to the groove of the case is formed, A spacing portion for separating the material from the case may be formed.

In an embodiment, the inductive coupler includes a power cable holder formed on the outside of the first and second ends to fix the power cable; A cable tie holder formed on a side surface of the case for fixing the cable tie; And a cable coupled to the outer case.

In an embodiment, the power cable holder may have a tapered configuration that narrows the entrance away from the end.

In an embodiment, the cable includes a signal cable hole at one end coupled to the case; And an AC inlet which can be fastened to the power line communication terminal at the other end.

The inductive coupler according to the present invention achieves high performance and cost reduction, and reduces the cost of eliminating the faulty power line communication, thereby reducing the construction cost of the communication network. The facility can easily shorten the operation time of the power line communication network, Power line communication is possible even with a load current, signal loss is minimized, installation is easy, stability is improved, electric wire shaking and cable damage can be prevented, and noise is not generated because there is no core fluctuation.

1 schematically shows a cross-section of an inductive coupler according to an embodiment of the present invention.
2 illustrates a state in which an external case of the inductive coupler according to an embodiment of the present invention is opened.
FIG. 3A is a front view of an external case of the inductive coupler according to one embodiment of the present invention, FIG. 3B is a rear view of the external case of the inductive coupler according to one embodiment of the present invention, FIG. And a one-touch clamp is formed on a side portion of the outer case of the coupler.
4 is a view showing a cable of an inductive coupler according to an embodiment of the present invention.
5 is a perspective view showing a power line passing through an inductive coupler according to an embodiment of the present invention.

Embodiments of the present application will be described in more detail with reference to the accompanying drawings. However, the techniques disclosed in the present application are not limited to the embodiments described herein but may be embodied in other forms.

The embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the present application to those skilled in the art. In the drawings, the width, thickness, and the like of the components are enlarged in order to clearly illustrate the components of each device. In addition, although only a part of the components is shown for convenience of explanation, those skilled in the art can easily grasp the rest of the components.

It is to be understood that when an element is described above as being located above or below another element, it is to be understood that the element may be directly on or under another element, It means that it can be done. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. In the drawings, the same reference numerals denote substantially the same elements.

Meanwhile, the meaning of the terms described in the present application should be understood as follows. The terms " first " or " second " and the like are intended to distinguish one element from another and should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise, and the terms "comprise" Components, components, or combinations thereof, and does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof .

Further, in carrying out the method or the manufacturing method, the respective steps of the method may occur differently from the stated order unless clearly specified in the context. That is, each process may occur in the same order as described, may be performed substantially concurrently, or may be performed in the opposite order.

Hereinafter, the present invention will be described in more detail.

Inductive coupler

An inductive coupler for power line communication, which is an aspect of the present invention, includes a core core material, and an enclosure capable of accommodating the core core material and including a hole through which a power line penetrates, the core core material comprising magnesium (Mg) Zinc (Zn) based ferrite.

More specifically, the inductive coupler may be a core-core material, which is a magnesium (Mg) -zinc (Zn) ferrite; An outer case including a hole through which the core core material is easily mounted and a power line penetrates, a cable can be easily attached to the outside, and can be opened and closed; And a power line cable passing through the hole formed in the outer case.

The non-contact type coupler may protect the built-in circuit of the non-contact type coupler, the power line modem, and the communication device by inserting an overvoltage protection circuit into a signal output unit that outputs a signal to the signal line wound around the non-contact type coupler. The overvoltage protection circuit prevents the occurrence of dielectric breakdown and safety accidents, and can be applied to a circuit using a single element such as a varistor or a diode, or a circuit for setting a correct voltage range by applying a diode or a capacitor to a circuit.

Hereinafter, the core core material, the outer case and the cable forming the inductive coupler will be described in detail.

Core core material

1 is a cross-sectional view (A-A ') of an inductive coupler according to an embodiment of the present invention.

1, the core core material 101 of the inductive coupler 100 according to an embodiment of the present invention is formed of magnesium (Mg) - zinc (Zn) ferrite, (220) and the second end (230). The core core material 101 may be designed in a toroidal shape in which a side circuit part 240 is enclosed on the inner circumferential surface of the case 200 so as to enclose a power line and are coupled to each other so that a magnetic circuit is formed in a closed circuit. It can be opened and closed. This maximizes magnetic induction efficiency and prevents magnetic saturation at high currents.

The Mg-Zn-based ferrite core core material 101 is an oxide-based magnetic core material, and is comparable to a conventional expensive Ni-Zn system, and can maintain a low cost and a similar performance.

In an embodiment, the core core material comprises 60 to 80 wt% iron oxide (Fe 2 O 3), 10 to 16 wt% zinc oxide (ZnO), 1 to 8 wt% manganese oxide (MnO), 1 to 16 wt% %, Copper oxide (CuO) 1 to 8 wt%.

The iron oxide (Fe 2 O 3) may include 60 to 80% by weight, preferably 65 to 75% by weight, based on 100% by weight of the whole core magnetic core material 101. In the above range, deterioration of the core magnetic core material is prevented, coupling strength is improved, insertion loss is reduced, and signal transmission characteristics are improved.

The zinc oxide (ZnO) may include 10 to 16% by weight, preferably 12 to 14% by weight, based on 100% by weight of the core core material 101 as a whole. In the above range, deterioration of the core magnetic core material is prevented, coupling strength is improved, insertion loss is reduced, and signal transmission characteristics are improved.

The MnO may be contained in an amount of 1 to 8% by weight, preferably 2 to 6% by weight based on 100% by weight of the core core material 101 as a whole. In the above range, deterioration of the core magnetic core material is prevented, coupling strength is improved, insertion loss is reduced, and signal transmission characteristics are improved.

The manganese carbonate (MnCO3) may contain 1 to 16% by weight, preferably 4 to 10% by weight, based on 100% by weight of the core core material 101 as a whole. In the above range, deterioration of the core magnetic core material is prevented, coupling strength is improved, insertion loss is reduced, and signal transmission characteristics are improved.

The copper oxide (CuO) may be contained in an amount of 1 to 8% by weight, preferably 2 to 6% by weight based on 100% by weight of the core core material 101 as a whole. In the above range, deterioration of the core magnetic core material is prevented, coupling strength is improved, insertion loss is reduced, and signal transmission characteristics are improved.

In an embodiment, the core-core material 101 may have a use frequency of 1 MHz to 50 MHz, and preferably 1.7 MHz to 30 MHz. Within this range, it is optimized for power line communication (PLC) and can provide an economical and effective solution for eliminating communication defects.

In an embodiment, the core core material 101 may have a core inner diameter (a) of 16 to 18 mm, preferably 16.5 to 17.5 mm, and more preferably 17 mm. In the range of the inner diameter (a), it is possible to prevent the occurrence of a large noise due to excessive fluctuation of electric wires in the ferrite core due to magnetic force when the electric current flows.

In another embodiment, the core core material 101 may be used at a core inner diameter (a) of 16 to 18 mm and a working frequency of 1 MHz to 50 MHz at a current amount of 1 to 40 A of electric wire, a) is 16.5 to 17.5 mm, the use frequency is 1.7 to 30 MHz, and the electric current amount of the wire can be used at 1 to 38 A current. In the above range, it is possible to efficiently solve the problem of the PLC communication failure due to the multi-branching of the electric wire, and it can operate at an excessive load current of up to 40 A and realizes high-speed PLC communication.

External case

The outer case 200 is formed by easily attaching the core core material 101 to the inside of the inductive coupler 100 of the present invention and easily attaching the cable of the cable 300 to the outside of the inductive coupler 100 . Such a structural improvement has an effect of facilitating installation and increasing stability.

2 illustrates a state in which an external case of the inductive coupler according to an embodiment of the present invention is opened.

2, the case 200 includes a first end portion 220, a second end portion 230, and the first and second end portions 220 and 230 where the power line through hole 55 is formed And a side surface portion 240 facing the side surface.

In one embodiment, the first and second ends 220 and 230 may be formed with a latch chain 203 for fixing the core core material 101 to the groove of the case 200. The latching chain 203 is connected to the core core material 101 in the grooves of the first end 220 and the second end 203 of the case 200 through which the power line 50 penetrates, Can be fixed.

A spacing portion 205 may be formed on the side portion 240 of the case 200 so as to separate the core core material 101 from the case 200. The spacing part 205 is located at a side part 240 of the case 200 connecting the first end 220 and the second end 230 to connect the core core material 101 to the outer case 200. [ As shown in FIG.

FIG. 3A is a front view of an external case of the inductive coupler according to one embodiment of the present invention, FIG. 3B is a rear view of the external case of the inductive coupler according to one embodiment of the present invention, FIG. And a one-touch clamp is formed on a side portion of the outer case of the coupler.

3 (A) to 3 (C), the inductive coupler 100 includes a power cable holder 211, a cable tie holder 213, and a cable 300).

In an embodiment, the inductive coupler 100 may further include a power cable holder 211. The power cable holder 211 may be formed outside the first end 220 and the second end 230 to fix the wire cable 300 having various thicknesses and dimensions to prevent movement in the core.

In an embodiment, the power cable holder 211 may have a tapered structure 212 that narrows the entrance away from the end.

The power cable holder 211 may have a tapered structure 212 that narrows the entrance as it gets farther from the first and second ends 220 and 230 to secure the cable 300 without shaking . At this time, the distal end of the tapered structure 212 of the power cable holder 211 contacting the wire cable 50 may be, for example, a trapezoid, an ellipse, or a triangle, The shape is not limited thereto as long as it can be fixed without shaking.

In an exemplary embodiment, the inductive coupler 100 may further include a cable tie holder 213.

The cable tie holder 213 is formed on the side portion 240 of the case 200 so that the cable tie can be fixed or fixed to the side of the cable tie holder 213 by fixing the inductive coupler 100 with a cable tie.

The inductive coupler 100 may further include a signal cable hole coupling part 215 and a one-touch clamp 217. The signal cable hole coupling part 215 may be formed of a metal plate.

The signal cable hole coupling part 215 performs coupling with the signal cable hole 301 of the cable 300 so that the signal cable 300 is terminally reacted with the core of the inductive coupler 100 It is possible to prevent damage to the signal cable and improve the completeness of the product.

The one-touch clamp 217 is formed on the side portion 240 of the case 200 to prevent the case 200 from being excessively opened after the core core material 101 is inserted into the case 200, The controller can perform the role.

cable

In an exemplary embodiment, the inductive coupler 100 may further include a cable 300 coupled to the case 200. The cable 300 may include a portion for connecting to the core of the inductive coupler 100 and the power line communication (PLC) modem, and may minimize the signal loss transmitted by selecting the thin wire cable.

4 is a view showing a cable of an inductive coupler according to an embodiment of the present invention.

Referring to FIG. 4, the cable 300 may include a signal cable hole 301 and an AC inlet 303.

In an embodiment, the cable 300 may include a signal cable hole 301 coupled to the case 200 at one end thereof. The signal cable hole 301 is engaged with the signal cable hole coupling part 215 of the case 200 to prevent the signal cable (wire) from being damaged.

In an embodiment, the cable 300 may include an AC inlet 303 that is fastenable to a powerline communication terminal at the other end. The AC inlet 303 may enable the inless coupler 100 to be coupled to a communication terminal of a power line communication (PLC) modem.

As described above, the inductive coupler 100 according to one embodiment of the present invention can include the core core material 101, the case 200, and the cable 300.

5 is a perspective view showing a power line passing through an inductive coupler according to an embodiment of the present invention.

Referring to FIG. 5, an inductive coupler 100 according to one embodiment of the present invention includes a core core material 101; The power cable holder 211, the cable tie holder 213 of the tapered structure 212, the signal cable hole coupling portion 215 and the one-touch clamp 217 An outer case 200; And a cable 300 including a signal cable hole 301 and an AC inlet 303 and may be coupled to a power line 50 of a power line communication (PLC) to transmit a signal to a data transmission device. The power line 50 passes through the power line through hole 55 and is reacted with the core core material 101 inside the case 200 between the first end 220 and the second end 230 of the case 200 can do. The power cable holder 213 has a tapered structure 212 that narrows the entrance as it gets farther from the end, so that the power cable (cable) 50 can be fixed. Also, the cable tie holder 213 may be positioned on the side surface 240 of the case 200 to fix the cable tie.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims as well as the appended claims.

50: power line 55: power line through hole
100: inductive coupler 101: core core material
203: Strapping 205:
200: external case 211: power cable holder
212: outer side projection portion 213: cable tie holder
215: Signal cable hole coupling part 217: One-touch clamp
220: first end 230: second end
240: side portion 300: cable
301: Signal cable hole 303: AC inlet
AA ': coupler cutting area (a): core inner diameter

Claims (8)

Core core material; And
An outer case including a hole for accommodating the core magnetic core material and through which a power line penetrates;
Lt; / RTI >
The core magnetic core material is a magnesium (Mg) -zinc (Zn) ferrite,
Wherein the core core material comprises 60 to 80 wt% iron oxide (Fe 2 O 3), 10 to 16 wt% zinc oxide (ZnO), 1 to 8 wt% manganese oxide (MnO), 1 to 16 wt% manganese carbonate (MnCO 3) (CuO) in an amount of 1 to 8% by weight.
delete The method according to claim 1,
The inductive coupler for power line communication according to claim 1, wherein the core magnetic core material has a frequency of 1 MHz to 50 MHz.
The method according to claim 1,
Wherein the core core material has a core inner diameter of 16 to 18 mm.
The method according to claim 1,
Wherein the outer case has first and second ends formed with through holes; And
A side portion connecting the first and second ends;
Lt; / RTI >
Wherein the first and second end portions are formed with latching portions for fixing the core magnetic core material to the grooves of the case,
Wherein the side portion is formed with a spacing portion that separates the core core material from the case.
The method according to claim 1,
A power cable holder formed on the outside of the first and second ends to fix the power cable;
A cable tie holder formed on a side surface of the case for fixing the cable tie; And
A cable coupled to the case;
Further comprising: an inductive coupler for power line communication.
The method according to claim 6,
Wherein the power cable holder has a tapered structure that narrows the entrance as it gets farther away from the end.
The method according to claim 6,
The cable includes a signal cable hole at one end coupled to the case; And
An AC inlet which can be connected to the power line communication terminal at the other end;
Wherein said inductively coupled coupler for power line communication comprises:

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