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Power carrier communication circuit capable of overcome compensating capacitor

A technology of power carrier communication and capacitor compensation, which is applied in the field of communication circuits, can solve the problems of communication signal amplitude drop, complex sending circuit, and inability to communicate, and achieve the effects of low hardware implementation cost, easy production and debugging, and low power consumption

Inactive Publication Date: 2007-12-19
杭州瑞琦信息技术有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

But it has some insurmountable shortcomings, that is, if there is a capacitive load on the power line—typically a reactive power compensation capacitor directly connected in parallel on the power line, then the power carrier signal will be greatly absorbed by these capacitors, causing the communication signal amplitude plummeted without communication
At this time, if you want to increase the transmission distance, you need to increase the transmission power of the carrier, and its DC power supply must have greater transmission power, resulting in more complex transmission circuits

Method used

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  • Power carrier communication circuit capable of overcome compensating capacitor
  • Power carrier communication circuit capable of overcome compensating capacitor

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Embodiment Construction

[0016] As shown in Figure 1, there is a high current load in the transmitter connected to the cable through an electronic switch. When the electronic switch operates, the current in the cable will change, and the receiver can detect the current to obtain the action time of the transmitter switch. We use the digital pulse interval modulation method to realize the sending and receiving of data. In a practical implementation, the high current load in the terminal is realized by a capacitor.

[0017] As shown in Figure 2, the power carrier communication circuit that can overcome the compensation capacitance includes a sending part and a receiving part. The sending part includes load capacitor C1, rectifier bridge D2, switch tube Q2 and current limiting resistor R6. One end of the load capacitor C1 is connected to the cable, and the other end is connected to an AC input end of the rectifier bridge D2. The other AC input end of the rectifier bridge D2 is connected to the cable. ...

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Abstract

This invention relates to a power carrier communication circuit, in which, the transmission part includes a load capacitor, a rectifying bridge, a switch tube and a current-limit resistor, in which, one end of the load capacitor is connected to the cable, the other end is connected with an AC input end of the rectifying bridge and the other AC input end is connected to the cable, the drain of the switch tube is connected with the positive of the bridge and the source is connected to the negative, one end of the current-limit resistor is connected to the grid of the switch tube and the other is connected with transmitted signals, the emitter and the collector protecting a triode are connected to the source and drain of the switch tube, two dividing resistors are connected with the base protecting the triode to be parallel to the bridge and output.

Description

technical field [0001] The invention relates to a communication circuit, especially a power carrier communication circuit, which can overcome the compensation capacitance on the line. Background technique [0002] The use of power lines to transmit information is a subject of extensive research. The traditional method is to superimpose high-frequency voltage carrier signals on the power lines, which can achieve fast information transmission, and the installation is very simple and convenient. But it has some insurmountable shortcomings, that is, if there is a capacitive load on the power line—typically a reactive power compensation capacitor directly connected in parallel on the power line, then the power carrier signal will be greatly absorbed by these capacitors, causing the communication signal amplitude Precipitous decline without communication. At this time, if the transmission distance is to be increased, the transmission power of the carrier needs to be increased, an...

Claims

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Application Information

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IPC IPC(8): H04B3/54
Inventor 周永沈坚张震鹏
Owner 杭州瑞琦信息技术有限公司
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