Power supply filter circuit and filter for broadband power line carrier communication test system

A broadband power line and power filter technology, applied in electrical components, impedance networks, multi-terminal-to-network, etc., can solve problems that are not suitable, can not well achieve signal isolation and coupling, and are inconvenient for carrier signal testing and analysis. The effect of improving usability

Active Publication Date: 2018-07-17
YUNNAN POWER GRID CO LTD KUNMING POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the filter disclosed in the above-mentioned patent application is not designed with a coupler circuit, which is not convenient for the test and analysis of the carrier signal, especially in the point-to-point test, the isolation and coupling of the signal cannot be well realized, and the existing filter has no basis The working frequency band of broadband power line carrier is 1-30MHz, so it is not suitable for broadband power line carrier communication test system

Method used

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  • Power supply filter circuit and filter for broadband power line carrier communication test system
  • Power supply filter circuit and filter for broadband power line carrier communication test system
  • Power supply filter circuit and filter for broadband power line carrier communication test system

Examples

Experimental program
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Effect test

Embodiment 1

[0022] like figure 1 As shown, this embodiment provides a power supply filter circuit for a broadband power line carrier communication test system with a built-in coupler, including an AC input terminal, a first-stage LC filter network, a common-mode signal suppression circuit, a discharge resistor, a second-stage LC filter network, Carrier signal coupler, AC output end and signal output end.

[0023] combine figure 2 As shown, the AC input terminal is the connector J3, the AC output terminal is the connector J4, and the signal output terminal is the connector J2. The first-level LC filter network is composed of a ring inductor L1, a ring inductor L3 and an X capacitor C1; the second-level LC filter network is composed of a ring inductor L2, a ring inductor L4 and two X capacitors C4 and C5. The first-level LC filter network and the second-level LC filter network are realized by a plug-in inductor with a ferrite core and an X capacitor that can suppress differential mode si...

Embodiment 2

[0026] This embodiment provides a power filter for a broadband power line carrier communication test system with a built-in coupler, including an aluminum casing, a circuit board, a front baffle, a rear baffle, a power plug, a power socket, an anti-magnetic wave metal connector, and a feeder metal connector .

[0027] like image 3 As shown, there is a card slot in the aluminum casing, green oil windows are opened on both sides of the circuit board, solder is applied, and the circuit board is inserted into the card slot of the aluminum casing. The ground is in multi-faceted and multi-point contact with the aluminum casing to ensure a good shielding effect. The front baffle and the rear baffle are installed at the front opening and the rear opening of the aluminum casing, respectively.

[0028] combine figure 2As shown, the power line composed of L line and N line in the power filter circuit on the circuit board is a shielded radio frequency cable, and the copper wire cladd...

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PUM

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Abstract

The invention discloses a power filter circuit and a power filter for a broadband power line carrier communication test system. The power filter circuit comprises an AC input end, a primary LC filter network, a discharge resistor, a common-mode signal inhibition circuit, a secondary LC filter network, a carrier wave signal coupler, a signal output end and an AC output end, wherein the discharge resistor and the common-mode signal inhibition circuit are arranged between L and N lines which are arranged between the primary LC filter network and the secondary LC filter network, the carrier wave signal coupler is arranged between L and N liens at the front end of the primary LC filter network, and the signal output end is connected to output of the carrier wave signal coupler. According to the power filter circuit and the power filter, noises of the power lines can be isolated, a reliable test environment is provided for broadband power line carrier products, the arranged carrier wave signal coupler can convert carrier waves signals from differential-mode signals into common-mode signals, and thus, the carrier wave signals can be transmitted via shielding RF lines.

Description

technical field [0001] The invention belongs to the technical field of broadband power carrier communication, and in particular relates to a power supply filter circuit and a filter for a broadband power line carrier communication test system. Background technique [0002] In recent years, broadband power line carrier technology has developed rapidly, gradually replacing narrowband power line carrier technology with the advantages of more stability and higher speed, and entering the fields of automatic meter reading system of electric energy meter, street lamp control and smart home. [0003] The invention patent application with the Chinese publication number CN103701427A discloses an external front-end filter for household appliances for improving the power spectral density of a power cat, including a bleeder resistor R, a common mode choke coil L f1 and L f2 , X capacitor C 1 , C 2 , C 3 and C 4 , the differential mode inductance L 1 and L 2 , and the high voltage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H7/01
Inventor 邹航吕俊王雷陈华灿姜莹张合强赵俊红王轶何觅
Owner YUNNAN POWER GRID CO LTD KUNMING POWER SUPPLY BUREAU
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