JP4445501B2 - Power conversion superposition system and high-frequency signal transmission system using it - Google Patents

Description

  The present invention provides a TV signal transmission line for supplying power to various electric devices such as amplifiers and frequency converters in a high-frequency signal transmission line (TV signal transmission line) constructed in an apartment house such as an apartment. The present invention relates to a power superimposing system for superimposing and supplying to a building, and an in-building transmission system incorporated in a high-frequency signal transmission path in the building using the same.

  As shown in FIG. 2, a television signal transmission line (high-frequency signal transmission line: usually a coaxial cable) is installed in an apartment house (building) such as a building or condominium where a cable TV system such as CATV or CCTV is introduced. K is laid, and an amplifier for compensating for the transmission loss of the television signal is connected thereto. Depending on the system, a frequency converter or other electrical equipment A may be connected to the high-frequency signal transmission line K.

  In general, a low DC voltage such as DC15V or DC24V is used for the power source of the electric device A. In an environment where a commercial power supply AC100V is secured near the electrical equipment A, the AC100V is stepped down by a transformer T, and the AC voltage in the electrical equipment A is converted into direct current by a power supply circuit (common name: AVR). DC low voltage such as DC15V and DC24V is obtained. In an environment where a commercial power source is not secured near the electrical device, the commercial power source of AC 100V is converted into a low voltage of AC 30V by the transformer T and is superimposed on the high-frequency signal transmission path K and transmitted. It is converted to DC15V, DC24V, etc. by AVR and supplied to the amplifier a of the electric device A. This system is generally called a power supply superposition system.

  The power supply superposition system shown in FIG. 2 includes a superposition circuit composed of a transformer T that steps down a commercial power supply of AC100V to AC30V, a choke coil L for high frequency prevention, and a capacitor C for low frequency prevention. The converted voltage of AC30V is superimposed on the high-frequency signal transmission line K and transmitted, and the superimposed voltage is converted into a DC voltage such as DC15V or DC24V by the AVR of the electric device A and supplied to the amplifier a of the high-frequency signal transmission line K. It is like that. Moreover, when the inside of the electric equipment A operates with a DC single power source (for example, DC 15 V), there is a method of superimposing the DC voltage on the high-frequency signal transmission path (not shown).

  Electrical devices such as amplifiers and frequency converters are made on the premise that commercial power is used, but there are various types of electrical devices with different gains, output levels, adjustment functions, and so on. There are various standards. For example, since the AVR circuit configuration is different between AC30V and AC100V, even if the same DC voltage (for example, DC15V) is output, equipment manufacturers can use AC30V input and AC100V so that they can support the power supply at the site of installation. Two types of input must be prepared. As an example, what is shown in FIG. 3 (a) is the input voltage AC100V, output voltage DC15V, what is shown in FIG. 3 (b) is the input voltage AC30V, output voltage DC15V, and what is shown in FIG. 3 (c) is the input voltage AC100 / 30V. The output voltage is DC15V. The AVR dedicated to AC100V input shown in FIG. 3A is inexpensive because it is often used, but there is a problem that it cannot be used in a place where there is no AC100V commercial power supply. The AVR dedicated to AC30V input in FIG. 3 (b) is expensive because there is little demand, and there is a problem that it cannot be used in a place without an AC30V power source. The AC100V / AC30V shared input AVR in FIG. 3 (c) requires only one type, so there is no problem like the input-only AVR, but there is a problem that it is expensive because it is special.

  It is desirable for the power supply superimposition system manufacturer to provide a power superimposition system that supports the various AVRs described above, but this involves difficulties in terms of design, inventory management, cost, etc., and the manufacturer predicts market trends. At present, the lineup of power supply superposition systems is narrowed to a small number by investigating customer intentions.

  When the lineup of power supply superimposition systems is narrowed down, there are no electrical devices with the desired characteristics (gain, output level, adjustment function, etc.). There is a situation where there is a shortage or there are few adjustment functions, and the original performance of electrical equipment does not match the installation site, making it difficult to find electrical equipment that is easy to use for the site. In addition, since the inside of electrical equipment normally operates with direct current such as DC15V and DC24V, for example, in the case of electrical equipment that operates with a single DC15V power supply, if DC15V is superimposed on a high-frequency signal transmission line, the DC15V It is relatively easy to take out the choke coil or the like in the electric device and supply it to the device of the electric device as it is to operate the amplifying unit. However, recently, due to diversification of devices, the operation voltage of the device itself is various, and a plurality of power sources such as DC15V and DC24V are often used together. For this reason, it has become difficult to provide a power supply superposition system capable of supplying an appropriate power source corresponding to electrical equipment, and the product lineup of manufacturers cannot meet the market demand. In addition, lineup of various electric devices for commercial power supply or power supply superposition system such as AC30V is troublesome in design / inventory management because of the large number of types, resulting in high cost.

  Since the AVR circuit configuration is different for AC30V and AC100V input, even if the same DC voltage (for example, 15V) is output, equipment manufacturers can use AC30V input and AC100V input to support the power supply at the site of installation. Two types of must be prepared. This complicates design and inventory management and contributes to high costs. AVR dedicated to AC 100V input is inexpensive because it is widely used, but there is a problem that it cannot be used in a place where there is no AC 100V commercial power supply. AVR dedicated to AC30V input is expensive because of low demand, and there is a problem that it cannot be used in a place where there is no AC30V power supply. Since there is only one type of AC100V / AC30V shared input AVR, there is no problem like the input-only AVR, but there is a problem that it is expensive because it is special.

The power conversion superimposing system of the present invention solves the above-described problems, and can supply a predetermined input power to the electric equipment on the television signal transmission path even in a place where commercial power cannot be secured. Therefore, as described in claim 1, in the power conversion superposition system in which the AC commercial power supply voltage is stepped down by the transformer and superimposed on the high frequency signal transmission line, the power conversion superposition system includes the transformer and the high voltage side of the transformer to the commercial power supply. A connectable power supply connector, a superimposing circuit for superimposing the converted power converted by the transformer on the high-frequency signal transmission path, and a power supply on the high-voltage side of the transformer can be taken out and supplied to the AVR for electrical equipment in the high-frequency signal transmission path A power supply tool, wherein the superimposing circuit includes two transmission lines connected to the low voltage side of the transformer, each transmission line including a connection terminal capable of superimposing the conversion voltage on a high-frequency signal transmission line, husband both transmission pathways of superimposing circuit people, with the converted voltage switching switch capable of switching supply and stop of the said connection terminals, two each of the transmission pathways of the superposition circuit Includes a coil, a capacitor is connected between the two transmission lines, both ends of the capacitor are respectively connected to the connection terminals, and a power source for supplying input power to the AVR is connected to the high voltage side of the transformer. A supply tool is provided.

Radio frequency signal transmission system of the present invention, as claimed in claim 2, wherein, in the high-frequency signal transmission line, the power conversion superimposition system, the radio frequency signal transmission system that superimposes the power, the power conversion superposition system of claim 1, wherein A power conversion superposition system, wherein the power conversion superposition system is connected to two or more locations of the high frequency signal transmission path, and one of the connection terminals of the two transmission paths of the superposition circuit in each power conversion superposition system is a high frequency signal transmission The other side is connected to the upstream side or the downstream side of the high-frequency signal transmission path, and the other is connected to the low-voltage side of the transformer of the other power conversion superposition system connected to the upstream side or the downstream side of the path. one of the power conversion superimposition system takes the utility voltage to the transformer by connecting a power connector of the transformer of the high-pressure side to the commercial power supply, the tiger Scan conversion voltage of the step-down has been the low-pressure side can be superimposed on the high-frequency signal transmission path from the transmission pathway of the superposition circuit, the other power conversion superimposed system is superimposed from the power conversion superimposed system to the high-frequency signal transmission line the coming superimposed power supply voltage boosts incorporated into the low pressure side of the transformer, and supplies the boosted voltage to a power supply device, to allow feeding as the AVR input power source for electric equipment in the high-frequency signal transmission line, the electrical equipment it is to be able to operate.

The power conversion superposition system of the present invention has the following effects.
Connect the power conversion superposition system of the same configuration to two or more places of the high frequency signal transmission line, connect the low voltage side of the power transformer of both power conversion superposition system to the high frequency signal transmission line, and the power source with one commercial power supply (one) If the high voltage side of the power transformer of the conversion superposition system is connected to the commercial power supply, the commercial power supply voltage (AC100V) is taken into the transformer and stepped down (AC30V). In the power supply conversion superposition system without the other (the other), the superimposed power supply voltage (AC30V) superimposed on the high-frequency signal transmission path can be boosted (AC100V) with a transformer and supplied to the AVR. For this reason, since various electric devices need only be designed assuming a normal commercial power supply, product management becomes easy, and the cost can be greatly reduced. Therefore, it is not necessary to prepare various AVRs having different input voltages, management becomes easy, and cost is reduced.

In the high-frequency signal transmission system of the present invention, the power conversion superposition system (the same one) of the present invention is connected to two or more locations of the high-frequency signal transmission line, and both the low-voltage sides of the transformers of the two power conversion superposition systems are connected to the high-frequency signal. Since it is connected to the transmission line side, the following effects are obtained.
1. The high voltage side of the transformer of one power conversion superimposing system is connected to a commercial power source, the commercial power supply voltage (for example, AC100V) is taken into the transformer, and the converted voltage (for example, AC30V) converted by the transformer is used as a high-frequency signal transmission line by the superimposing circuit. The other power conversion superimposing system boosts the superimposed power supply voltage (for example, AC30V) transmitted through the high-frequency signal transmission path with a transformer (for example, to AC100V), and takes the boosted power supply voltage as the input power of AVR. The DC voltage converted by the AVR can be supplied to the electric device. Therefore, if there is a commercial power supply on one power conversion superimposing system side, AC100V can be secured even if there is no commercial power supply on the other power conversion superimposing system side, and this is supplied to the AVR with the input voltage AC100V. Can do.
2. Since one type of power conversion superposition system with the same configuration can be shared in two or more places on the high-frequency signal transmission line, the electrical equipment used in the building transmission system is one whose input voltage is compatible with the high voltage output voltage of the power conversion superposition system. By preparing different types of AVR, the power conversion superimposing system and AVR can be unified with one standard, so it is not necessary to prepare various standards of AVR and power conversion superimposing systems, and the manufacturing cost is reduced. Management becomes easy. Moreover, since it is sufficient to design an electric device assuming only a normal commercial power supply, the design is facilitated.

(Embodiment 1)
An example of an embodiment of a power conversion superimposing system of the present invention and an in-building transmission line (high-frequency signal transmission system) using the system will be described below with reference to FIG. FIG. 1 shows an embodiment in which the power conversion superposition system 2 of the present invention is connected to two locations (an environment without a commercial power source and an environment) upstream and downstream of a high-frequency signal transmission line 1 laid in the building. . A coaxial cable is used for the high-frequency signal transmission line 1 similarly to the existing one, but a cable other than the coaxial cable can also be used if possible.

  Each power conversion superposition system 2 includes a transformer 3, a superposition electric circuit 4 that superimposes the conversion voltage on the high-frequency signal transmission line 1, a plug (commercial power connector) 5 that plugs into a commercial power outlet and takes in commercial power. An interlocking power switch SW1 provided between the commercial power input side of the transformer 3 and the plug 5 and capable of switching supply / stop of input power to the transformer 3, and a commercial power input side of the transformer 3 and the interlock switch SW1. A high-voltage power supply outlet (power supply tool) 6 connected between them is provided.

  The superposition electric circuit 4 has two transmission lines 7 and 8, and the high-frequency blocking choke coils L 1 and L 2 are connected to the transmission lines 7 and 8, respectively, and between the output sides of both choke coils L 1 and L 2. A high-frequency signal passing capacitor C is connected. Superimposition changeover switches SW2 and SW3 capable of switching the superposition / superposition stop of the step-down power supply to the high-frequency transmission path 1 are connected to the transmission paths 7 and 8, respectively. Connection terminals OUT1 and OUT2 are provided.

  The two power conversion superposition systems 2 in FIG. 1 have the same configuration, and the high voltage side and the low pressure side of the transformer 3 of both power conversion superposition systems are connected in opposite directions (the power conversion superposition system 2 on the right side in FIG. 1). Transformer 3 connects the high voltage side to the input side and the low voltage side to the output side. Transformer 3 of the left power conversion superposition system 2 connects the high voltage side to the output side and the low voltage side to the input side) (see FIG. 1). The power conversion superposition system 2 on the right side is for step-down conversion that converts a commercial power supply (for example, AC100V) to AC30V, and the power conversion conversion superposition system 2 on the other side (left side in FIG. 1) is for step-up that converts the superposition voltage (for example, AC30V) to AC100V. It can be used as

(Description of operation of the transmission system in the building in FIG. 1)
The operation of the in-building transmission system of FIG. 1 is as follows. This operation explanation is for the case where the commercial power source is AC100V, the superimposed power source is AC30V, and the high-frequency signal transmitted through the high-frequency signal transmission line 1 is a TV signal. The high-frequency signal may be other than the TV signal. Further, FIG. 1 shows that the superposition changeover switch SW3 of both the left and right power conversion superposition systems 2 is closed, the switch SW2 is opened, the power switch SW1 of the left power conversion superposition system 2 is opened, and the power switch of the right power conversion superposition system 2 This is the case when SW1 is closed.

  When the AC plug (power connector) 5 of the power conversion superposition system 2 on the downstream side (right side) in FIG. 1 is inserted into a nearby commercial power outlet and the power switch SW1 in FIG. 1 is closed, the commercial power is captured. The taken AC100V commercial power is converted (stepped down) to AC30V by the transformer 3 and output to the secondary side, and is superimposed on the high-frequency signal transmission line 1 through the closed superposition changeover switch SW3 (switch SW2 is open) and upstream. Is transmitted to the side. Superposition is performed in the same way as existing superposition.

  The superimposed AC30V voltage is input to the transformer 3 through the choke coil L2 of the upstream power conversion superposition system 2, and is converted (boosted) to AC100V by the transformer 3, and from the secondary side to the outlet (power supply tool) 6 Supplied. If the AVR plug 9 is inserted into the power supply 6, AC100V is taken into the AVR and converted into a predetermined DC voltage (for example, DC15V, DC24V) and supplied to the amplifying unit 11 of the electric device 10 in the high-frequency signal transmission path 1. The In this case, the high-frequency signal (TV signal) transmitted through the high-frequency signal transmission path 1 is amplified by the electrical device 10 on the upstream side (left side in FIG. 1), passes through the capacitor C, and is downstream of the high-frequency signal transmission path 1. Is transmitted, passed through the capacitor C of the power conversion superposition system 2 on the downstream side (right side in FIG. 1), transmitted downstream, amplified by the amplification unit 11 of the electrical device 10 connected to the output end, and further downstream Is transmitted. At this time, since the power switch SW1 of the power conversion superposition system 2 on the upstream side (left side in FIG. 1) is open, the secondary output (AC100V) of the transformer 3 flows to the AC plug (commercial power connector) 5. Absent.

  When both the superposition changeover switches SW3 of the two power conversion superposition systems in FIG. 1 are opened and the other superposition changeover switch SW2 is closed, the voltage of AC30V stepped down by the transformer 3 of the right power conversion superposition system 2 in FIG. The signal is superimposed on the downstream side of the high-frequency signal transmission path 1 through the superposition changeover switch SW2 and transmitted downstream.

  If there is a commercial power supply in the environment where the power conversion superposition system 2 on the left side of FIG. 1 is installed, the power supply connector (plug) 5 of the power conversion superposition system 2 is inserted into a commercial power outlet and the commercial power supply is used. can do. In this case, the interlock switch SW1 of the left power conversion superposition system 2 is closed, the superposition changeover switch SW3 of both power conversion superposition systems 2 is closed, SW2 is opened, and the power supply connector of the right power conversion superposition system 2 in FIG. (Plug) 5 is removed from the commercial power outlet, and the interlock switch SW1 of the power conversion superposition system 2 is opened. In this way, the commercial power taken in by the power connector 5 of the power conversion superposition system 2 on the left side of FIG. 1 is stepped down to AC30V by the transformer 3 and superimposed on the high-frequency transmission line 1 through the superposition changeover switch SW3 and downstream. The voltage is transmitted and enters the transformer 3 through the superposition changeover switch SW3 of the power conversion superposition system 2 on the right side, and is boosted to AC100V by the transformer 3 and supplied to the power supply 6. The TV signal is also transmitted downstream through the capacitor C of the power conversion superposition system 2 on the left side and the capacitor C of the power conversion superposition system 2 on the right side of FIG.

  Although the electric device 10 in FIG. 1 is an amplifier, the electric device 10 may be a frequency converter or another device.

Explanatory drawing which shows an example of the ridge transmission system of this invention. Explanatory drawing which shows an example of the conventional ridge transmission system. (A)-(c) is explanatory drawing of AVR from which a standard differs.

DESCRIPTION OF SYMBOLS 1 High frequency transmission path 2 Power supply superimposition system 3 Transformer 4 Superposition electric circuit 5 Commercial power supply connection tool 6 Power supply tool 7, 8 Transmission path 9 Plug 10 Electric equipment 11 Amplification part L1, L2 Choke coil C Capacitor SW1 Power switch SW2, SW3 selector switch OUT1, OUT2 External connection terminal

Claims (2)

In the power conversion superposition system that steps down the AC commercial power supply voltage with a transformer and superimposes it on the high-frequency signal transmission line,
The power conversion superimposing system includes a transformer, a power connector that can connect the high voltage side of the transformer to a commercial power source, a superimposing circuit that superimposes the converted power converted by the transformer on a high-frequency signal transmission line, and a power source on the high voltage side of the transformer. A power supply that can be taken out and supplied to the AVR for electrical equipment in the high-frequency signal transmission path,
The superposition circuit includes two transmission lines connected to the low voltage side of the transformer,
Each transmission line includes a connection terminal capable of superimposing the conversion voltage on a high-frequency signal transmission line,
Each of the transmission lines of the superimposing circuit includes a changeover switch capable of switching supply / stop of the conversion voltage to the connection terminal,
Each of the two transmission lines of the superimposing circuit includes a coil, and a capacitor is connected between the two transmission lines,
Each of both ends of the capacitor is connected to each of the connection terminals,
A power supply tool for supplying input power to the AVR is provided on the high voltage side of the transformer.
A power conversion superposition system characterized by that. In a high-frequency signal transmission system in which power is superimposed on a high-frequency signal transmission line by a power conversion superposition system,
The power conversion superposition system is the power conversion superposition system according to claim 1,
The power conversion superposition system is connected to two or more locations of the high-frequency signal transmission path;
One of the connection terminals of the two transmission lines of the superposition circuit in each power conversion superposition system is on the low voltage side of the transformer of the other power conversion superposition system connected to the upstream side or the downstream side of the high-frequency signal transmission path, and the other is Connected to the upstream side or downstream side of the high-frequency signal transmission line,
One of the two or more power conversion superimposing systems is a power conversion superimposing system that connects a power connector on the high voltage side of the transformer to a commercial power supply, takes the commercial power supply voltage into the transformer, and is stepped down by the transformer. Can be superimposed on the high-frequency signal transmission line from the transmission line of the superposition circuit ,
The other power supply conversion superimposing system boosts captures superimposed power supply voltage coming superimposed from the power conversion superimposed system to the high-frequency signal transmission line to the low pressure side of the transformer, and supplies the boosted voltage to a power supply device, a high-frequency A high-frequency signal transmission system characterized in that it can be fed as an input power source of an AVR for an electric device in a signal transmission path, and the electric device can be operated .

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