JP2003163619A - Distributor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distributor capable of power line carrier communication by using a power line inside a house as an information transmission line even when the distributor electrical path is interrupted. <P>SOLUTION: Between input/output ends 3 and 4 of the same polarity across an opening/closing part 2 of a cable run 9 distributing commercial power inside a building, a high-pass filter 5 having a low impedance for a carrier frequency performing the power line carrier communication and a high impedance for a commercial power frequency is provided. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power distribution device suitable for use in power line carrier communication.

[0002]

2. Description of the Related Art Conventionally, load devices or load devices such as a plurality of lighting devices and air conditioners, which are distributed in a building such as a house and are connected to a commercial power source serving as a power line and controlled through the commercial power source. There is a power line carrier terminal device or a power line carrier terminal such as a power line carrier terminal operation device on the operating side. In addition to such power line carrier terminals,
The power line in the home is used as an information transmission line, and the signal is transmitted from outside the house, and WWW (World Widow) is used.
Internet communication called "de Web" is also under study.

When using a power line in a home as an information transmission line, it is desirable in the Radio Law Enforcement Regulation to install a blocking filter according to the transmission of the signal so that the transmission signal does not leak outside the dwelling unit. Has been done.
On the other hand, there is a concern that obligating the installation of this blocking filter may hinder the spread of the power line carrier communication system in terms of price or utilization. Further, deregulation that the use of a blocking filter is not required when using a power line carrier communication system of a special system is also attempted.

By the way, in many cases, a single-phase, three-wire type commercial power source is provided as a power line in the home. That is, the above power line carrier communication system is generally provided across different phases of this single-phase three-wire commercial power supply. Therefore, the above blocking filter is used by being housed inside the distribution board 100 together with power distribution equipment such as a limiter and a breaker, and between the different phase wirings of the single-phase three-wire type wiring inside the distribution board 100, a commercial power frequency is applied. On the other hand, a series resonance circuit having a high impedance and a low impedance with respect to a carrier frequency corresponding to the transmission of a signal for performing power line communication is provided.

[0005]

According to the above conventional technique, a commercial power source is distributed in a home as a branch circuit obtained by branching a plurality of circuits from a single-phase three-wire main trunk. That is, as a power line, a branch breaker is provided with an opening / closing section having a rated current of 20 A. Therefore, when a load current exceeding the rated current flows into the single-phase three-wire main trunk or branch circuit to which the device that performs Internet communication is connected, the switching part is automatically shut off and the branch circuit is connected to the outside of the house. It is physically disconnected from the line and communication becomes impossible. Further, for example, when a security sensor is provided as a power line carrier terminal device and a home security system is configured by using a power line, a problem that the function of the security system stops due to excessive use of electricity (overload) is assumed. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to perform power line carrier communication by using a home power line as an information transmission line even when a power distribution device cuts off the power line. To provide power distribution equipment.

[0007]

In order to achieve the above object, in a power distribution device of the present invention, between the input and output ends of the same pole sandwiching an opening / closing part of a power line for distributing a commercial power source in a building. A high-pass filter having a low impedance with respect to a carrier frequency for performing power line carrier communication and a high impedance with respect to a commercial power supply frequency is provided.

With this structure, even if the opening / closing part of the power distribution device for distributing the commercial power supply in the building is in an open state, a carrier wave for carrying out power line carrier communication is provided between the input and output ends of the same pole sandwiching it. The power line carrier communication can be performed through a high-pass filter having a low impedance with respect to the frequency and a high impedance with respect to the frequency of the commercial power source and a power line for distributing the commercial power source.

It is preferable that the high pass filter is formed of a plastic film capacitor.
In this case, a plastic film capacitor that has a low impedance with respect to the carrier frequency for power line carrier communication and a high impedance with respect to the commercial power frequency between the input and output terminals of the same polarity of the power distribution equipment that distributes the commercial power in the building. Power line carrier communication is performed via the high-pass filter formed in.

Further, the high-pass filter is formed by connecting respective input and output terminals of a transformer having a winding ratio of 1: 1 between capacitors having different phase inputs and between outputs having different phases, respectively. It is also preferable to allow it. In this case, connect a transformer with a winding ratio of 1: 1 between the input and output terminals of different phases of the power distribution equipment that distributes the commercial power supply in the building, through a capacitor, respectively.
Power line carrier communication is performed via a high-pass filter formed so as to have a low impedance with respect to a carrier frequency for power line communication and a high impedance with respect to a commercial power supply frequency.

Further, it is preferable to dispose the capacitors having the same capacitance value on both terminals as the capacitors.
In this case, a high-pass filter having a low impedance with respect to the carrier frequency for power line communication and a high impedance with respect to the commercial power supply frequency is provided with the same capacitance at both terminals of each input and output of different phases of the power distribution equipment. Value capacitor, and 1: 1
It is formed with a transformer having a turns ratio of.

Further, it is preferable that the electric circuit is formed as a branch breaker by branching a plurality of circuits from the main trunk. In this case, even if the opening / closing part of the branch circuit that branches the plurality of circuits from the main trunk is in the open state, it is low with respect to the carrier frequency for performing power line carrier communication, which is provided between the input / output terminals of the same pole that sandwiches the branch circuit. Power line carrier communication is performed via a high-pass filter having a high impedance with respect to the impedance and the commercial power supply frequency, and the branch circuit for distributing the commercial power supply.

[0013]

1 to 4 show a first embodiment corresponding to the inventions of claims 1, 2 and 5, and FIGS. 5 and 6 correspond to the inventions of claims 3 and 4. 2 shows a second embodiment of the present invention.

[First Embodiment] FIG. 1 shows a first embodiment of the present invention.
The block diagram which shows the schematic structure which shows the power distribution apparatus of 1st Embodiment, FIG. 2 is the explanatory view which shows the effect | action of the power distribution apparatus, FIG.
FIG. 4 is an explanatory diagram of one usage state of the power distribution device, and FIG. 4 is a block diagram showing an example of a power line carrier communication device used together with the power distribution device.

The power distribution device 1 of this embodiment has the same frequency between the input and output terminals 3 and 4 of the same pole that sandwiches the opening and closing part 2 of the electric circuit 9 for distributing the commercial power source in the building, with respect to the carrier frequency for performing the power line carrier communication. A high-pass filter 5 having a low impedance and a high impedance with respect to a commercial power frequency is provided.

More specifically, this power distribution device 1 includes the electric circuit 9
A single-phase two-wire branch circuit 9 in which multiple circuits are branched from the main trunk
1 and a branch breaker 11 for opening and closing the branch circuit 91.
In this case, the high-pass filter 5 is formed by a plastic film capacitor 51. This branch breaker 11 can be installed on the specified distribution board with terminal devices that connect the switching part 2 and the electric wire by the bipolar with a handle that manually opens and closes the circuit of the single-phase two-wire circuit. The plastic film capacitors 51, 51 are provided in a housing unit having a predetermined module unit size, and together with the mechanical parts constituting them, are connected and housed between the input / output terminals 3 and 4 of the same polarity. In addition, in the present invention, the power distribution device, in addition to such a branch breaker 11, a main circuit breaker that opens and closes a main circuit, and a current called a limiter that limits the amount of current used to a certain contract current value. It can also be a limiting device.

The high-pass filter 5 uses a plastic film capacitor 51 formed by depositing a metal film on a polyester resin thin film called a metallized polyester capacitor and laminating it. This metallized polyester capacitor
High capacitances are offered in a relatively small size and over a high rated voltage range. As the high-pass filter 5, a metallized polyester capacitor having an AC rated voltage of 250 V and a capacitance of 1 μF is used.

By the way, at present, according to the Radio Law Enforcement Regulation, the frequency that can be used for power line carrier communication is 10 kHz to 45 kHz.
It is 0 kHz. In the branch breaker 11, the impedance of the plastic film capacitor 51 at, for example, 100 kHz is 1 / ωC =
It is a small value of 1.59Ω. Therefore, as in the frequency characteristic of the high-pass filter 5 shown in FIG. 2, there is almost no attenuation even when the opening / closing section 2 of the branch breaker 11 for distributing commercial power in the building through the branch circuit 91 is in an open state. Distributing a high-pass filter 5 and a commercial power source, which are provided between the input and output terminals 3 and 4 of the same polarity that sandwich the pin, having a low impedance with respect to the carrier frequency for power line communication and a high impedance with respect to the commercial power frequency. The carrier signal in the above frequency band can be sufficiently passed through the single-phase two-wire branch circuit 91. Then, for a commercial power frequency of 60 Hz, which is the power source,
/ΩC=2.61 kΩ, which is a large value, and even if the load side is short-circuited, the load side is not energized and the circuit is protected, and the commercial power supply does not pass even when the switching unit 2 is closed. The commercial power is supplied through the opening / closing unit 2. That is, since the plastic film capacitor 51 that constitutes the high-pass filter 5 is normally not energized, there is almost no deterioration of the material, and the product life of the branch breaker 11 is not impaired.

Further, the electric circuit 9 of the power distribution device 1 is configured as a branch circuit 91 obtained by branching a plurality of circuits from the main trunk, and the power distribution device 1 is configured as a branch breaker 11, and the high pass filter 5 is provided.
Also, the power line carrier communication is performed through the branch circuit 91 for distributing the commercial power source. Therefore, only by replacing the branch breaker 11, the home power line can be stably used as an information transmission line, and the power line can be used. The carrier communication can be performed, and even in an existing house, there is no need to replace the entire distribution board, which is convenient.

In the above power distribution device 1, as shown in FIG. A branch breaker 11 that distributes a commercial power source through a branch circuit 91 that branches a plurality of circuits from a main trunk in a building, and a charging battery as a power line carrier communication system terminal via an outlet 10 arranged on the load side thereof. It is possible to arrange and use the notebook PCs 13 and 13 equipped with.

Note that the notebook PC 13 is, as shown in FIG.
A CPU of the main body (central processing unit) that controls necessary information such as arithmetic processing in order to put a signal on the carrier wave toward the branch circuit 91 (power line) on the load side of the branch breaker 11 to which commercial power is not supplied 0 or 1 from
The bit information (digital signal) of is transmitted to the power line modulation / demodulation unit 15 provided in the interface card.

In this interface card,
Power is supplied from the power supply 14 having the charging battery, and in addition to the power line modulation / demodulation unit 15, it has, for example, a high-pass filter and an insulating transformer corresponding to the carrier frequency of power line carrier communication. It has a coupling circuit 16 formed of a high-pass filter. Then, by converting the above bit information into an analog signal and superimposing the signal toward the power line, the signal can be transmitted from the input side of the branch breaker 11. Also, when receiving information, the A / D-converted digital signal is taken into the CPU of the main body in the reverse order of the above procedure. A buffer circuit (Buffer) 17 in the figure is used to temporarily store data and intermediate results necessary for the arithmetic processing of the CPU, and is formed by, for example, a memory device.

In the above configuration, even if a load current exceeding the rated current flows through either branch circuit through the branch breaker 11 in the configuration shown in FIG. 3 and the open / close section of the branch breaker 11 is opened, Mutual data communication between the notebook PCs 13 and 13 is provided between the input / output terminals of the same polarity with the opening / closing section sandwiched therebetween, and has a low impedance with respect to the carrier frequency for performing power line carrier communication and a high impedance with respect to the commercial power frequency. A high frequency can be passed through a high-pass filter 5 (not shown) having the above and a branch circuit for distributing a commercial power source, so that power line carrier communication can be performed.

Therefore, according to the power distribution device 1 described above, the branch breaker 11 for distributing the commercial power supply in the building is provided.
Even if the opening / closing part 2 is open, it is provided between the input / output terminals 3 and 4 of the same pole that sandwich the opening / closing part 2 and has a low impedance with respect to the carrier frequency for performing power line carrier communication, and with respect to the commercial power supply frequency. Since power line carrier communication can be performed via the high-pass filter 5 having high impedance and the branch circuit 91 that distributes the commercial power source, even when the distribution device cuts the power line, the power line in the home is used as the information transmission line to perform the power line carrier communication. Is achieved.

Then, between the input / output terminals 3 and 4 of the same pole of the branch breaker 11 for distributing the commercial power source in the building, the impedance is low with respect to the carrier frequency for performing power line carrier communication, and high with respect to the commercial power source frequency. Since power line carrier communication is performed via the high-pass filter 5 formed of the plastic film capacitor 51 having impedance, for example, 100 kHz is 10 kHz to 450 kHz which is the carrier frequency of power line carrier communication that can be used according to the Radio Law Enforcement Regulations. It is possible to realize, in a small space, an impedance having a low impedance and a high impedance with respect to a commercial power supply frequency of 60 Hz, for example. Further, even if the opening / closing part 2 of the branch circuit 91 that branches a plurality of circuits from the main trunk is in an open state, it is provided between the input / output terminals 3 and 4 of the same pole sandwiching the branch circuit 91, and the carrier frequency for performing power line carrier communication. Since the power line carrier communication is performed via the high-pass filter 5 having a low impedance with respect to the commercial power supply frequency and the high-pass filter 5 having a high impedance with respect to the commercial power supply frequency and the branch circuit 91 for distributing the commercial power supply, only by replacing the branch breaker 11. The internal power line can be used as an information transmission line for stable power line carrier communication, which is convenient.

[Second Embodiment] FIG. 5 is a block diagram showing the schematic arrangement of a power distribution device according to the second embodiment, and FIG.
[Fig. 7] is a block diagram showing a schematic configuration of another embodiment of the power distribution device.

The power distribution device of this embodiment is different from that of the first embodiment only in the configuration of the high-pass filter, and the other components are the same as those of the first embodiment. The device 1 has the different phase inputs 31 and 3 of the branch circuit 91.
Input terminals and output terminals of the transformer 6 having a winding ratio of 1: 1 are connected and formed between the two terminals and between the different-phase outputs 41 and 42 via the capacitors 7, respectively. Further, in the power distribution device of the embodiment, as the capacitor 7, a plastic film capacitor 71 having the same capacitance value is provided on both of the terminals.

The high pass filter 5 has a winding number ratio of 1: 1.
Of the insulating type high frequency transformer, and a plastic film capacitor 71 having the same capacitance value (C1 = C2 = C3 = C4) with one end connected to each terminal of the high frequency transformer. This plastic film capacitor 71 has its capacitance value determined so that the sum of C1 and C2 and C3 and C4 is approximately 1 μF, and the other end is connected to a single-phase two-wire line. Note that each of these capacitors has a total AC rated voltage value of C1 and C2, and a total AC rated voltage value of C3 and C4 of 25.
It can be set to 0 V, and a relatively small one can be selected.

In the above structure, a load current exceeding the rated current flows in the branch circuit 91 through the branch breaker 11,
When the opening / closing part 2 of the branch breaker 11 is in the open state, the data communication via the branch circuit 91 is performed at the commercial frequency.
The impedance of the high-pass filter formed by the plastic film capacitor 71 becomes high, current does not flow in the primary winding of the transformer 6, and the impedance of the plastic film capacitor 71 becomes small in the high frequency band. An electric current flows through the primary winding of the above, a signal component is generated on the side of the secondary winding, and a signal is received. In transmitting a signal, even if the opening / closing section 2 is in the open state, the procedure is the reverse of the above, and the signal is received from the secondary side of the transformer 6 toward the primary side. At this time, the transformer 6 ensures that the input / output terminals 3 and 3 of the opening / closing section 2 are
The high-pass filter 5 can be formed in a small space by using a smaller capacitor 7 by using four plastic film capacitors which are insulated from each other and have the same capacitance value.

Therefore, according to the power distribution device 1 described above, the branch breaker 11 for distributing a commercial power source in the building.
Between terminals 31 and 32 of input 3 and output 4 of different phase of
A transformer 6 having a winding ratio of 1: 1 is connected between 1 and 42 via a capacitor, and has a low impedance with respect to a carrier frequency for power line carrier communication and a high impedance with respect to a commercial power supply frequency. Since the power line carrier communication is performed via the high-pass filter 5 formed as described above, the input / output ends 3 and 4 of the opening / closing unit 2 are reliably insulated. Further, the high pass filter 5 is the branch breaker 1
Since it is formed between the different phase inputs 31 and 32 of 1 and between the different phase outputs 41 and 42, the capacitors 7 of the same capacitance value are provided at both terminals, respectively, and the transformer 6 having a winding ratio of 1: 1. The high-pass filter 5 can be formed in a small space by using a smaller capacitor 7.

In addition to the above-mentioned ones, the present invention, for example, as shown in FIG.
It is also preferable that the main breaker 12 provided in the electric line 92 of the wire is provided with the high-pass filter 5. This one has an impedance (1 / ωC) at 100 kHz, for example, due to a series circuit of windings n1, n2, n3, n4 of a transformer 8 formed by a high frequency transformer with an intermediate tap and a capacitor 7 (C1 to C6). ,
As a small value of the above-mentioned 1.59Ω, a signal in such a frequency band is sufficiently passed through the intermediate taps to the windings n1 to n4, and, for example, a commercial frequency of 6 is used as a power source.
The impedance (1 / ωC) at 0 Hz is set to a large value of the above-mentioned 2.61 kΩ. In this case, almost no transmission signal flows in the series circuit of the capacitor 7 and the winding of the transformer 8. That is, the capacitance of C1 + C2,
The capacitance of C2 + C3, the capacitance of C4 + C5, or the capacitance of C5 + C6 is set to about 1 μF, and n1: n
The turn ratio of 2: n3: n4 is 1: 1: 1: 1.
According to this, power line carrier communication is realized by using the power line in the home as an information transmission line even when the distribution device cuts off the power line, and only the signal component from the different wiring system in the single-phase three-line is realized. There is also an effect that it can be passed.

[0032]

The present invention is implemented as described above, and is provided between the input and output ends of the same pole that sandwiches the open / close portion of the power distribution equipment for distributing the commercial power in the building even if the opening / closing portion is in the open state. Power line carrier communication can be performed through a high-pass filter having a low impedance for the carrier frequency for power line carrier communication and a high impedance for the commercial power supply frequency and a power line for distributing the commercial power supply, so that the distribution device can cut off the power line. Even in this case, the power line in the home can be used as an information transmission line to carry out power line carrier communication.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a power distribution device according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an operation of the power distribution device.

FIG. 3 is an explanatory diagram of one usage state of the power distribution device.

FIG. 4 is a block diagram showing an example of a power line carrier communication device used together with the power distribution device.

FIG. 5 is a block diagram showing a schematic configuration of a power distribution device according to a second embodiment.

FIG. 6 is a block diagram showing a schematic configuration of another embodiment of the power distribution device.

[Explanation of symbols]

1 power distribution equipment 11 branch breakers 12 Main Breaker 2 opening and closing part 3 input end 4 output end 5 high pass filter 6 transformers 7 capacitors 9 electric circuits 91 Branch circuit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kenji Kuniyoshi             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Miyuki Choda             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company F-term (reference) 5K046 AA03 CC02 CC08 CC09 CC17                       PS03 PS33 ZZ11

Claims (5)

[Claims] 1. A low impedance with respect to a carrier wave frequency for performing power line carrier communication and a high impedance with respect to a commercial power supply frequency, between input and output terminals of the same pole sandwiching an opening / closing part of a circuit for distributing a commercial power supply in a building. A power distribution device comprising a high-pass filter having impedance. 2. The power distribution device according to claim 1, wherein the high-pass filter is formed of a plastic film capacitor. 3. The high-pass filter is formed by connecting respective input and output terminals of a transformer having a turns ratio of 1: 1 via capacitors between the different-phase inputs of the electric path and between the different-phase outputs. The power distribution device according to claim 1. 4. The power distribution device according to claim 3, wherein the capacitors having the same capacitance value are arranged on both of the terminals as the capacitors. 5. A branch breaker, wherein the electric circuit is a branch circuit in which a plurality of circuits are branched from a main trunk.
The power distribution device according to claim 1.