JPS6271441A - Electric light line conveyance control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a power line conveyance control device, and is particularly suitable for a device that performs load control by connecting a large number of control terminal devices to a power line of a commercial power source. This invention relates to a power line conveyance control device.

[Background of the invention]

In recent years, power line conveyance control equipment, which connects multiple control terminal devices to the power line of a commercial power source and uses the power line as a signal line to transmit load control signals, has been widely used for remote control such as home control systems. I'm about to be killed.

Conventional power line carrier control devices use high frequency signals (hereinafter referred to as signal carrier high frequency) to carry signals that become load control signals when a large number of control terminal devices are connected to a power line.
Because the signal carrier high frequency is attenuated due to the influence of the human output section, for example, as described in Japanese Patent Application Laid-Open No. 57-135637, the input impedance of the signal carrier high frequency human output section is increased (to reduce the attenuation of the signal carrier high frequency). It was supposed to prevent...

However, regarding the high frequency characteristics of the load, for example, when the load is a home appliance such as a television, the power supply circuit of the television is generally equipped with a capacitor for noise prevention, and the human power impedance to high frequencies is extremely low. No consideration was given to the fact that when such a load is connected, the signal carrier high frequency will be significantly attenuated.

[Purpose of the invention]

The present invention has been made in order to solve the problems of the prior art described above. The purpose is to provide a power line conveyance control device that operates stably without being affected by the connected load.

[Summary of the invention]

The configuration of the power line conveyance control device according to the present invention is such that a plurality of control terminal devices each having a transmitter/receiver, a load control relay, and a load control output terminal are connected to the power line of a commercial power source to control the load. In the power line carrier control device configured to transmit and receive signal carrier high frequency waves related to signals via the power line, between the output contact of the load control relay in the plurality of control terminal devices and the load control output terminal, An impedance converter is provided so that the impedance to the signal carrier high frequency wave is large when viewed from the power supply side and small when viewed from the load side.

Additionally, the idea behind developing the present invention is as follows.

The loads connected to each control terminal device of the power line carrier control system cannot be specified, and therefore the high frequency characteristics of the loads are completely unknown. In other words, for example, there are products with low high-frequency human impedance, such as televisions, and products that generate high-frequency noise, such as vacuum cleaners, and even the same product has significantly different characteristics depending on the model, and the type of load on each control terminal device. The characteristics of power lines with respect to signal carrier high frequencies change significantly depending on the operating conditions and operating conditions. Therefore, each control terminal -
By eliminating the intermittent output relays of the equipment and the influence of the load connected to each control terminal device on the signal carrier high frequency, the operation of the power line carrier control system composed of multiple control terminal devices is stabilized. It is possible.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a schematic configuration diagram of a power line carrier control system according to an embodiment of the present invention, FIG. 2 is a configuration diagram of the control terminal device of FIG. 1, and FIG. 3 explains a signal carrier high frequency. It is an explanatory diagram.

In FIG. 1, indoor power lines la and lb are connected to a commercial power source 3 via a blocking filter 2 to prevent noise leakage.

4a, 4b, and 4c indicate a plurality of control terminal devices connected to the indoor power lines 1a and lb, and each of these control terminal devices 4
Loads 5a, 5b, and 5c are connected to a, 4b, and 4c, respectively. Each of the control terminal devices 4a, 4b, 4c has the same structure, and the structure is shown in FIG. 2 and will be described later.

The respective loads 5a, 5b, and 5C are controlled by the indoor power line 1a.
, lb is carried by the load control signal. That is, as shown in FIG. 3, indoor electric light lines 1a,
The carrier wave of 1b is shown in FIG. 3(al), and the data signal n which becomes the load control signal has the waveform of FIG. 3(b),
In order to make it possible to transmit this data signal, a high frequency modulated wave or a signal carrier high frequency is used which is amplitude modulated as shown in FIG.
, 4C to control each load.

Next, the configuration of the control terminal device will be explained.

In Fig. 2, 6 is a power plug, 7 is a transceiver, 8 is a control device, 9 is a signal output section, 10 is a signal input section, 11 is a load control relay, 16 is an impedance converter, and 17 is a load control output terminal. shows.

The power supply plug 6 is connected to the transmitter/receiver 7 , the output contact 13 of the load control relay 12 , and the impedance converter 16 , and is connected to the load control output terminal 17 via the impedance converter 616 .

Further, the transceiver 7 is connected to a control device 8,
A signal input section 10 and a signal output section 9 are connected to the control device 8, and a coil 12 of a load control relay 11 is connected to the signal output section 9.

Furthermore, the impedance converter 16 includes a common mode choke 14 on the output contact side for increasing impedance against high frequencies, and a capacitor 15 on the load control output terminal side for reducing high frequency impedance as seen from the load side.
and a signal carrier as viewed from the output contact 13 side, that is, the power supply side.

The impedance to the signal carrier high frequency is large (the impedance to the signal carrier high frequency seen from the load control output terminal 17 side, that is, the load side is small).

That is, in the configuration of the impedance converter 16 shown in FIG.
).

Here, f: signal carrier j: complex symbol (j”=-1) -LISL,: self-inductance of common mode choke 14 C: capacitance z of capacitor 15,: power source impedance z &: load impedance (1), In equation (2), since the signal carrier f is high frequency, f is large (and therefore lZs, l is thick (and 1
z21 becomes smaller.

Next, the operation of this embodiment will be explained.

When an operation signal is manually input from the signal input unit 10, the content of the operation signal is checked by the control device 8, and the content of the signal is sent to the transceiver 7.
The transmitter/receiver 7 modulates the signal with a carrier high frequency and sends it to the indoor power lines 1a and 4b.

2 The control terminal devices (4a, 4b, 4c, etc.) that are to be controlled by the signals sent to the indoor power lines 1a and 1b receive the signals with the transceiver 7, demodulate the signals, send them to the control device 8, and send the signals to the control device 8. When it is determined that the load control signal is directed to the mouthparts, the output contact 13 of the load control relay 11 is opened and closed via the signal output section 9. The load connected to this upper load control output terminal 17 is connected and disconnected by the output contact 13, and the connection point 18a between the load control output terminal 17 and the transceiver 7 and the power plug 6,
Since the impedance converter 16 is connected between the transmitter and receiver 18b, the transmitter/receiver 7 is not affected by the load.

According to this embodiment, since the characteristics of the impedance converter 16 are determined by the signal carrier high frequency, it is possible to prevent the influence of the load on the transceiver 7 regardless of the type of load or the operating state.

In addition, since the impedance to the signal carrier high frequency seen from the power supply side to the load can be made high, it is possible to prevent attenuation of the signal carrier high frequency due to a decrease in impedance when a large number of control terminal devices 4a, 4b, 40, etc. are used.

Furthermore, since the impedance to the signal carrier high frequency seen from the load side is low, errors due to noise generated by the load can be prevented.

In this way, the impedance converter 16 allows each control terminal device to be used while ignoring the influence of the load connected to it, making it possible to perform power line conveyance control that is extremely easy to use and operates stably. Can you provide the equipment?

〔Effect of the invention〕

As described above, according to the present invention, in a power line conveyance control system in which a plurality of control terminal devices are connected to a power line of a commercial power source, it is possible to prevent the power line from being affected by the load connected to each control terminal device. (It is possible to provide a stable operating power line conveyance control device.)

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a power line carrier control system according to an embodiment of the present invention, FIG. 2 is a configuration diagram of the control terminal device of FIG. 1, and FIG. 3 explains a signal carrier high frequency. It is an explanatory diagram. 1a, 1b...Light line, 3...Commercial power supply, 4a, 4
b, 4c...control terminal device, 5a, 5b, 5c...
Load, 6...Power plug, 7...Transmitter/receiver, 8...
-Control device, 9...Signal output section, 10...Signal input section, °11...Load control relay, 13...Output contact, 14...Common mode choke, 15...Capacitor, 16...In7-dance converter, 17...Load control output terminal.

Claims (1)

[Claims] 1. A plurality of control terminal devices equipped with at least a transmitter/receiver, a load control relay, and a load control output terminal are connected to a power line of a commercial power source, and a signal carrier high frequency related to a load control signal is transmitted through the power line. In the power line carrier control device configured to transmit and receive, an impedance to a signal carrier high frequency is present between the output contact of the load control relay and the load control output terminal in the plurality of control terminal devices when viewed from the power source side. 1. A power line conveyance control device comprising an impedance converter configured to have a large impedance and a small impedance when viewed from the load side.