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A method and system for separating electrical signals based on power line carrier

A power line carrier and separation system technology, applied in the direction of modulation carrier system, distribution line transmission system, transmission system, etc., to achieve the effect of improving the attenuation value

Active Publication Date: 2016-05-04
SHENZHEN GONGJIN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production of this modem requires EMC testing. During the EMC testing process, it is necessary to detect all electromagnetic wave signals generated during the working process of the PLC modem, but it cannot be mixed with other environmental noises. In the work of the PLC modem, it is necessary to receive Into the mains, so through the mains wires will bring noise to the PLC modem, and the output / input of the PLC modem is through the power cable, since the mains power cable itself is in a huge power grid, it has a very complex electromagnetic wave environment , if you directly detect the output signal of the working PLC modem when doing EMC detection, it will not get better results. Pure PLC modem output signals are isolated from the complex electromagnetic environment of the grid, no such attempt has been made

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  • A method and system for separating electrical signals based on power line carrier
  • A method and system for separating electrical signals based on power line carrier

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Embodiment Construction

[0027] EMC (Electromagnetic Compatibility) testing is required for the produced PLC modem. During the EMC test, in order to ensure the reliability of the test results, it is only necessary to filter out the noise generated in other places such as the circuit when the PLC modem is working. Therefore, the present invention employs three main steps:

[0028] First, provide pure power frequency power for the PLC modem. The power frequency power used in this embodiment is a 110V~250VAC50Hz / 60Hz mains signal provided by the power grid (mains power grid). Electromagnetic signal isolation, only provide pure 110V~250VAC50Hz / 60Hz power frequency power signal for PLC modem. The pure 110V~250VAC50Hz / 60Hz power frequency power signal is input to the PLC modem through a pair of wires.

[0029] In this step, the live wire and the neutral wire of the power frequency mains are isolated (filtered) by the equipment of this embodiment except all signals except the power frequency mains, and the ...

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Abstract

The invention provides a method and system for separating an electric signal based on a power line carrier. According to the method, a pure power frequency power source is provided for a PLC modem, a PLC is powered on to work, a power line carrier signal is produced, and then a power frequency signal is filtered to produce a pure power line carrier signal. A low-pass isolating circuit is adopted to input the pure power frequency power source in a power grid to the PLC modem, and then a high-pass coupling circuit is adopted to output the power line carrier signal. The method is simple and practical, and the circuit is small in size.

Description

technical field [0001] The present invention relates to the field of power line carrier communication, in particular to a power line carrier signal separation method and system for separating pure power line carrier communication modem signals generated during the working process from the power grid when performing EMC detection on the power line carrier communication modem . Background technique [0002] PLC (PowerLineCarrier) power line carrier. Power line carrier PLC is a unique communication method for power systems. Power line carrier communication refers to the technology of using existing power lines to transmit analog or digital signals at high speed through carrier waves. The biggest feature is that there is no need to re-establish the network, as long as there are wires, data transmission can be carried out. Power line communication (PLC) provides a cost-effective method for introducing intelligent monitoring and control in many industrial applications, utilizing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B3/54H04L27/00
Inventor 谢卓
Owner SHENZHEN GONGJIN ELECTRONICS CO LTD
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