JPH04158615A - Block filter - Google Patents

Abstract

PURPOSE:To eliminate adverse effect due to leakage magnetic flux even when plural filters are installed in a same distribution panel by adopting an annular inductance core without any gap for the core of a parallel resonance circuit so as to form a closed magnetic path. CONSTITUTION:Insulation boards 7, 8 are housed in the inside of an outer shell 6 of almost the same shape as that of a circuit interrupter, and a power supply terminal 9 and a load side terminal 10 are provided on the upper side of the insulation boards 7, 8. Then the inductance coil 12 of a parallel resonance circuit formed by winding a wire to an annular-shaped inductance core 11 without any gap, a capacitor C and a series resonance circuit B are interposed between the terminals 9 and 10 to form a block filter 1. Thus, the inductance core of the parallel resonance circuit is formed to be an annular shape without any gap to form a closed magnetic path and to reduce leakage of magnetic force of lines, then even when plural block filters are installed in the same distribution panel, the adverse effect on device control due to the leakage magnetic flux is not caused.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a block filter that blocks a high frequency signal carrier wave superimposed on a commercial frequency voltage waveform.

[Conventional technology] Electrical equipment used in homes, offices, etc. has become widely diversified.
Along with automation, centralized remote control has become more sophisticated, requiring the installation of a control signal transmission network.

As a control signal transmission method, attempts are being made to remotely control devices by superimposing high-frequency signal carrier waves on indoor power lines connected to commercial power sources.

In this case, the high-frequency signal carrier wave on which the control signal is superimposed may propagate through the power lead-in line and leak outdoors, or it may leak to the power lines of other systems in the same building, or this type of high-frequency signal carrier wave may leak from the outdoors. In order to prevent disturbances such as confusion or inability to perform remote control due to intrusion, install the commercial frequency power supply/distribution at the commercial power outlet or indoor distribution board 5 circuit breaker box, etc. It was necessary to install a block filter that blocks the superimposed high-frequency signal carrier waves without causing interference.

That is, as shown in FIG. 4, which is an explanatory diagram of an example of the use of a block filter, a plurality of power distribution systems (a182).

Block filters la and lb are installed adjacent to circuit breakers (hereinafter referred to as breakers) 2a and 2b in the distribution board in a building with (b + b2) etc., and the frequency 6087 is transmitted by remote control transmitters 3a and 3b , 12 on the 1st line
A 5KHz signal and 2 Takaoka waves are superimposed and sent to indoor power wiring to power lighting equipment, air conditioners, gas appliances, home appliances such as televisions, opening/closing windows and doors, locks, etc. (hereinafter referred to as "devices"). The configuration is such that a carrier signal can be received by a remote control receiver 51 4a, 4b, etc. to control equipment (not shown). Note that 5 is a power breaker installed on the commercial power supply line from outside.

A conventional block filter of this type is described in, for example, Japanese Patent Laid-Open No. 169944/1983.

FIG. 5 is a circuit diagram of the conventional block filter disclosed in the above publication, and FIG. 6 is a side sectional view of the same block filter.

In the figure, the block filter consists of each parallel resonant circuit (A) consisting of a capacitor C and an inductance L connected to each of the single-phase three-wire power lines Ws, Wb, and We, and a voltage line W having a different phase from the grounding wire W. , ,w, ,power supply side,W,A
, and each series resonant circuit (b) consisting of a capacitor cl and an inductance L1 connected between W and -B,
A series resonant circuit consisting of a capacitor c2 and an inductance L2 that is connected between the load side A0-80 of the voltage lines w, Wh and passes a high-frequency signal carrier wave between the voltage lines W and the electric Ff-line W. c) It is pointed.

And load side A. , between Wo, between B o and W o,
Or load side A. When a load connected between This prevents the carrier signal from passing through, that is, leaking the carrier signal to external power transmission and distribution lines.

Then, as shown in the side sectional view in Figure 6, an iron outer box (
An insulating stand (E) is housed inside the insulating stand (E), and a power supply side terminal (E) and a load side terminal (E) are provided on the top surface of the insulating stand (E), and between the two terminals (E) and (G). A coil L wound around a square iron core (C), a capacitor C, and a series resonant circuit (B) (
C) is interposed to form a block filter.

[Problem to be solved by the invention]

However, in the conventional example described above, when it is necessary to superimpose independent control signals on multiple power distribution systems, it is necessary to install multiple block filters housed in iron outer cases (d) for each system. However, it requires a large amount of space.

In addition, if multiple block filters are installed in - distribution boards, the magnetic flux of the inductance that makes up the parallel resonant circuit will leak, affecting the power lines of other power distribution systems and the inductance in the block filters, causing equipment There was a problem that it had a negative effect on control.

This invention was made in order to solve the problems of the prior art described above, and its purpose is to provide a block filter that does not adversely affect equipment control due to leakage magnetic flux even when multiple blocks are installed in the same distribution board. It is something to do.

(Means for Solving the Problems) For this reason, the block filter according to the present invention has an outer shell having approximately the same shape as that of a circuit breaker, and includes a parallel resonant circuit inserted in series in a commercial power line. The block filter blocks a high frequency signal carrier wave superimposed on a commercial frequency voltage waveform, and is characterized in that the inductance core of the parallel resonant circuit has a ring shape with no air gap and forms a closed magnetic path. The configuration aims to achieve the above objectives.

(Function) With the above configuration, the high frequency signal carrier wave superimposed on the commercial frequency voltage waveform can be blocked by the parallel resonant circuit inserted in series with the commercial power line. The inductance core of the parallel resonant circuit is housed in an outer shell that has almost the same shape as the circuit breaker, and the inductance core of the parallel resonant circuit is in the form of a ring with no air gaps, forming a closed magnetic path, so that leakage of magnetic lines of force is extremely small. Even if multiple devices are installed in a panel, there will be no adverse effect due to leakage magnetic flux.

〔Example〕

Hereinafter, the block filter according to the present invention will be explained using examples.

FIG. 1 is a basic circuit explanatory diagram showing the basic essential parts of the circuit configuration of an embodiment according to the present invention.

As shown in the figure, this embodiment includes a parallel resonant circuit A consisting of an inductance L and a capacitor C inserted in series with a power line a1 of a commercial power line consisting of power lines a and a2, and a power line a.

Inductance L1 and capacitor C inserted between 32
It has a series resonant circuit port consisting of 1 as a basic circuit.

As shown in the side sectional view of FIG. 2, an insulating stand 7.8 is housed inside an outer shell 6 having approximately the same shape as the circuit breaker, and a power supply side terminal 9 is mounted on the upper surface of the insulating stand 7.8. A load side terminal 10 is provided, and between the two terminals 9 and 10, an inductance coil 12 of a parallel resonant circuit A in which a conducting wire is wound around a ring-shaped inductance core 11 with no air gap, a capacitor C, and a series resonant circuit port are connected. A block filter 1 is constructed by interposing the two filters.

By making the inductance core 11 into a ring shape with no air gap, it is possible to form a closed magnetic path and reduce the leakage of magnetic lines of force as much as possible, unlike in the past, which adversely affects equipment control due to leakage magnetic flux to adjacent block filters and power lines. There is no.

FIG. 3 is a perspective view of another embodiment having the above configuration,
It has a mold outer shell 6a having substantially the same shape and dimensions as the outer shape of the circuit breaker.

Therefore, when multiple block filters are installed together with multiple circuit breakers in the same distribution board, placement and wiring work is easy, and the same outer shell can be used for both block filters and circuit breakers. This allows for rationalization of manufacturing.

(Effects of the Invention) As explained above, according to the present invention, a high frequency signal carrier wave superimposed on a commercial frequency voltage waveform can be blocked by a parallel resonant circuit inserted in series in a commercial power line. The inductor core of the parallel resonant circuit has an outer shape that is almost the same as that of the circuit breaker, and the inductance core of the parallel resonant circuit is formed into a ring shape with no air gap to form a closed magnetic path and reduce leakage of magnetic lines of force as much as possible. Therefore, space can be saved by installing multiple devices in the same distribution board, and leakage magnetic flux does not adversely affect equipment control.

Therefore, the superimposed high-frequency signal carrier wave may leak outdoors through the power supply line, leak to other systems within the same building, or enter this type of high-frequency signal carrier wave from outdoors. The desired remote control is confused.
To provide a block filter suitable for forming a control signal transmission network for centralized remote control, which prevents failures such as impossibility, and supports the wide diversification and automation of electrical equipment used in homes, offices, etc. be able to.

[Brief explanation of the drawing]

FIG. 1 is a basic circuit explanatory diagram showing the basic essential parts of the circuit configuration of one embodiment according to the present invention, FIG. 2 is a side sectional view of the same embodiment, and FIG. 3 is a perspective view of another embodiment. FIG. 4 is an explanatory diagram of an example of the use of a block filter, FIG. 5 is a circuit diagram of a conventional block filter, and FIG. 6 is a side sectional view of the same block filter. 1.1a, lb is pro, filter, 2a. 2b and 5 are circuit breakers, 3a and 3b are remote control transmitters,
4a and 4b are remote control receivers, 6.6a is the outer shell, 7.8
is the insulation stand, 9 is the power supply side terminal, 1o is the load side terminal 1o, 1
1 is the inductance score, 12 is the inductance coil of the parallel resonant circuit, L, L is the inductance, C, C,
is a capacitor, A is a parallel resonant circuit, and A is a series resonant circuit. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] It has an outer shell that is almost the same shape as that of a circuit breaker,
A block filter is provided with a parallel resonant circuit inserted in series in a commercial power line and blocks a high frequency signal carrier wave superimposed on a voltage waveform of a commercial frequency, wherein the inductance core of the parallel resonant circuit is a ring with no void. A block filter characterized by its shape and forming a closed magnetic path.