JPH04158616A - Block filter - Google Patents

Abstract

PURPOSE:To eliminate adverse effect on equipment control due to leakage magnetic flux, to reduce dispersion in magnetic reluctance and to uniformize the characteristic by forming the inductance core of a parallel resonance circuit to be an open magnetic path having an air gap toward an external mounting face. CONSTITUTION:An inductance core 1 for the inductor of a parallel resonance circuit provided between a power supply terminal 9 and a load side terminal 10 is formed to be an open magnetic path having an air gap 13 toward the external mounting face such as a distribution panel side and an inductance coil 12 is wounded on the core. Then a capacitor C and a series resonance circuit B are interposed to form a block filter 1. Thus, the rate of fluctuation of magnetic reluctance due to ununiformed core material resulting from the increase in the magnetic reluctance at the air gap is decreased, the leakage of magnetic flux to the outside is reduced and even when plural filters are installed in the same distribution panel, 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 conduction of a high frequency signal carrier wave superimposed on a commercial frequency voltage waveform.

[Conventional technology]

Electrical equipment used in homes and offices has diversified widely,
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 from commercial power sources.

In this case, a high-frequency signal carrier wave with a control signal superimposed on it travels through the power service line and leaks outdoors, or leaks to the power line of another system in the same building, or this kind of high-frequency signal carrier wave from outdoors leaks. In order to prevent problems such as confusion or inability to operate the intended remote control (hereinafter referred to as remote control) due to intrusion by It is necessary to attach a block filter to the power supply/distribution of commercial frequency power to block conduction of 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 (al a2 ).

(bl b2), etc., adjacent to the circuit breakers 52a, 2b in the distribution board in the building,
, lb is installed and the remote control transmitter Δ devices 3a and 3b are used.
For example, a signal carrier wave of 125KH1 is superimposed on a power line with a frequency of 60) IZ and sent to the indoor power wiring, and it is used to control bright appliances, air conditioners, gas appliances, home appliances such as televisions, and the opening/closing of windows and doors.
Locks, etc. (hereinafter referred to as equipment)
, 4b, etc., and can control the device (not shown). Note that 5 is a power breaker installed on the commercial TTI lead line from outdoors.

An example of a conventional block filter of this type is the one described in Japanese Unexamined Patent Publication No. 56-169944.

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) and the voltage wires W a and W that are in phase with the ground wire W (.
Each series resonant circuit (b) consisting of a capacitor C1 and an inductance Ll connected between Wi Ai and Wi-Bi on the power supply side of b, and electric rF wires W a and W b
A capacitor C is connected between Ao and Bo on the load side of , and allows a high frequency signal carrier wave to pass between the voltage line Wa and the voltage line wb.
2 and inductance L2 (c)
It consists of

When the load connected between the load side Ao and Wo, between Bo and Wo, or between the load side Ao and Bo is controlled by the carrier signal, the parallel resonant circuit The resistance value of (a) increases, and the resistance value of the series resonant circuit (b) decreases, thereby blocking conduction of carrier wave No. 43 and preventing leakage 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 end (F) and a load side terminal (G) are provided on the top surface of the insulating stand (E), and both terminals (E) and (G) are connected to each other. A coil L and a capacitor C are wound around a square iron core (C) and a series resonant circuit (B) (
C) is interposed to form a block filter.

(Problem B to be solved by the invention) However, in the above conventional example, when it is necessary to superimpose independent control signals on multiple power distribution systems, each system is stored in an iron outer box (2). It is necessary to install multiple block filters, which requires a large space.

In addition, if multiple block filters are installed in ~ distribution panels, 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 is a problem in that it has a negative effect on control.

However, when measures are taken to prevent magnetic flux leakage by constructing a closed magnetic circuit with a ferromagnetic core, even slight differences in the material of the ferromagnetic material in the core can cause a large change in magnetic resistance, leading to large variations in inductance characteristics. There are concerns.

This invention was made in order to solve the problems of the prior art described above, and it is possible to prevent the device control from being adversely affected by leakage magnetic flux even if multiple devices are installed in the same distribution board, and to reduce the variation in magnetic resistance. The purpose is to provide a uniform block filter with few characteristics.

(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. This is a block filter that blocks conduction of high-frequency signal carrier waves superimposed on the commercial frequency voltage waveform, and the inductance core of the parallel resonant circuit has an open magnetic path shape with an air gap on the external mounting surface side. With a configuration characterized by
This aims to achieve the above objectives.

[Function] With the above configuration, the conduction of the high frequency No. 13 carrier wave superimposed on the commercial frequency voltage waveform can be interrupted by the parallel resonant circuit inserted in series with the commercial power line. Since they are housed in an outer shell that has almost the same shape as a circuit breaker, it is easy to install multiple devices in the same distribution board, and it is also convenient for wiring work.

Since the inductance core of the parallel resonant circuit has an open magnetic path shape with a gap on the external mounting surface side, the magnetic resistance in the gap increases, resulting in a magnetic field due to the non-uniformity of the inductance core (Mi core) material. The rate of resistance variation is greatly reduced, and the characteristics of the block filter are made more uniform. In addition, a magnetic path can be formed by the mounting surface, which reduces leakage of magnetic flux to the outside.

(Example) Hereinafter, a block filter according to the present invention will be explained using an example.

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 a power line AL A2, and a power line A1.

The basic circuit includes a series resonant circuit port consisting of an inductance Ll inserted between the capacitor 32 and a capacitor CI.

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 an inductance core 11 of an inductance L of a parallel resonant circuit A provided between both terminals 9 and terminal 0 is an open magnetic path having an air gap 13 on an external mounting surface side 14, for example, on the distribution board surface side. The inductance coil 12 is wound. A block filter 1 is constructed by interposing a capacitor C and a series resonant circuit port.

Note that the inductance core 11 of the parallel resonant circuit has an open magnetic path shape with a gap 13 on the external mounting surface 14 side, so the gap 13 increases magnetic resistance, which is caused by non-uniformity of the material of the inductance core (magnetic core). By significantly reducing the rate of variation in magnetic resistance, the characteristics of the block filter 1 can be made uniform. Moreover, by installing it on a distribution board, etc., there is no gap! Since an effective magnetic path can also be formed in the third block, leakage of magnetic lines of force to the outside can be reduced as much as possible, and unlike the conventional method, there is no adverse effect on device control due to leakage magnetic flux to adjacent block filters or power lines.

FIG. 3 is a perspective view of another embodiment having the above configuration.
It has a molded 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 with a commercial power line. .

Since the inductance core of the parallel resonant circuit has an open magnetic path shape with a gap on the external mounting surface side, the rate of variation in magnetic resistance due to non-uniformity of the magnetic core material is greatly reduced by increasing the magnetic resistance due to the gap. Therefore, the characteristics of the block filter can be made uniform. In addition, since a magnetic path can be formed by the mounting surface, leakage of magnetic flux to the outside can also be reduced.

In addition, since the outer shell has almost the same shape as that of a circuit breaker, multiple devices can be installed in the same distribution board to save space, and leakage magnetic flux does not adversely affect equipment control. Never.

Therefore, the superimposed high-frequency signal carrier waves may leak outdoors through power service lines, leak to other systems within the same building, or enter this type of high-frequency signal carrier waves from outdoors. Control signal transmission for centralized remote controllers that prevents problems such as confusion or inability to perform the intended remote control, and supports the wide diversification and automation of electrical equipment used in homes, offices, etc. A block filter suitable for network formation can be provided.

[Brief explanation of the drawing]

FIG. 1 is a basic circuit explanatory diagram showing the basic essential parts of the circuit configuration of a practical 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. 1g5 is a circuit diagram of a conventional block filter, and FIG. 6 is a side sectional view of the same block filter. 1.1a, lh is Bu017 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 an insulating stand, 9 is a power supply side terminal, 10 is a load side terminal, 11 is an inductance core, 12 is an inductance coil of a parallel resonant circuit, 13 is a gap, 14 is a distribution board surface, L, Ll
is an inductance, C and CI are capacitors, 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 includes a parallel resonant circuit inserted in series in a commercial power line to cut off conduction of a high frequency signal carrier wave superimposed on a commercial frequency voltage waveform, the inductance core of the parallel resonant circuit being externally attached. A block filter characterized in that it has an open magnetic path shape with a gap on the surface side.