KR870004601A - Power transmission device - Google Patents

Abstract

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Description

Power transmission device

Since this is an open matter, no full text was included.

1 and 2 show a connection relationship of a communication system having a power transmission device according to the principles of the present invention.

3 shows the relationship between FIG. 1 and FIG.

＊ Explanation of symbols for main parts of drawing

105: presser line 106,107: wire

110: network termination interface unit 111, 112, 114, 131: transformer

115: DC band DC converter 117: low pass filter

118: transmission interface 120: subscriber equipment

Claims (8)

A power transmitter for use in a communication system for transmitting digital pulses and power from a central office to a remote customer interface unit, wherein the digital office and the interface are used for digital pulse transmission between the central office and the interface unit. A pair of transmission wires extending between units and terminating at the transformer of the central office and the transformer of the interface unit, wherein the transformer of the interface unit has a pair of terminal terminals and an intermediate step terminal connected to the pair of transmission wires; The pair of transmission wires having a mid-tapped coil, a grounded power supply connected to the pair of wires in the central office for supplying power to each wire, a terminal connected to the mid-tab terminal, and a ground terminal; Having the inter Power transfer apparatus comprising the power converter of the device unit. 2. A power transmitter according to claim 1, wherein said power source comprises a first power unit connected between one of the transmission lines and ground and a second power unit between the other of the transmission lines and ground. 3. The transformer of claim 2, wherein the transformer of the central office has a pair of terminal terminals and the power transmission device comprises a capacitor connected between one of the pair of wires and one of the terminal terminals of the transformer of the central office. And a pair of capacitors comprising another capacitor connected between the other one of the pair of wires and the other one of the terminal terminals of the transformer of the central office. 2. The power transmitter of claim 1, wherein the mid-tap coil has two balanced portions that are equal in the presence of equivalent current but are also designed to produce a flux. 5. The power transmitter of claim 4, further comprising a low pass filter connected between ground and a ground terminal of the power converter. A two-wire transmission line for the transmission of digital pulses between the central office and the customer interface unit supplies power from the central office to a remote customer interface connected between the central offices and equipped with an electronic circuit, the transmission line being the customer interface unit. A power transmitter terminated at a transformer of a transformer and a transformer of a central office, each of which has a grounded ground terminal, one of two power supplies connected to each wire of a two-wire transmission line, and two of the transmission lines A pair of capacitors connected in series between the two wires and the transformer of the central office, the transformer of the interface unit having a mid-tapped coil having an endpoint connected to the wire of the transmission line, and the interface unit having a grounded ground terminal With input terminal connected to and middle tap Power transmission apparatus comprising a power converter circuit for providing an interface circuit. A power transmission device for supplying power to a central office to a remote customer interface unit connected to the central office by an interface unit for digital pulse transmission between the central office and the remote interface unit and a pair of transmission wires terminated by a transformer of the central office. The power transmitter includes an output terminal connected to one of the transmission wires and a grounded ground terminal, and a pair of power supplies for supplying power to each of the pair of wires, and the interface unit includes an input terminal and a ground terminal. A transformer having at least one electrical circuit, the transformer terminating the transmission wire in an interface unit having a terminal terminal connected to the pair of wires and an intermediate terminal connected to the input terminal of the at least one electrical circuit. With a coil, The power is the power transfer unit, characterized in that provided by the return to the ground between the power supply and the electric circuit are transmitted to the interface unit, and from the central office in parallel with the pair of transmission by wire. Power from the central operator to the remote customer interface unit interconnected by a communication circuit with a pair of wires extending between the communication switching office and the remote customer interface unit and terminated in a transformer coil with an intermediate tap of the interface unit. A power transmitter for transmitting, the power transmitter comprising: a power source having an output terminal and a ground terminal connected to the wire in the switching office for supplying power to the wire; an input terminal connected to an intermediate step of the transformer coil; And power conversion means having a ground terminal, and filter means connected between the power converter and the ground terminal and ground to support a signal passage of a predetermined frequency. ※ Note: The disclosure is based on the initial application.