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Three-phase low power consumption control intelligent electric energy meter based on zero line judging switching power supply

A technology of smart electric energy meter and switching power supply, which is applied in the direction of measuring electricity, electrical components, measuring electric variables, etc., can solve the problems of poor interference suppression ability of switching power supply, and the electric energy meter cannot work normally, so as to achieve high reliability and suppress conducted interference. capacity, energy saving effect

Inactive Publication Date: 2011-09-07
WUHAN SAN FRAN ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But on the one hand, due to the poor interference suppression ability of switching power supply, on the other hand, if there is no neutral line or wrong phase in the general three-phase switching power supply energy meter, the energy meter will not work normally. The power supply scheme of the electric energy meter still needs to be continuously improved

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  • Three-phase low power consumption control intelligent electric energy meter based on zero line judging switching power supply
  • Three-phase low power consumption control intelligent electric energy meter based on zero line judging switching power supply
  • Three-phase low power consumption control intelligent electric energy meter based on zero line judging switching power supply

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Such as figure 1 As shown, the three-phase low-power cost-controlled smart energy meter of the present invention based on zero-line judgment switching power supply includes a switching power supply module, a single-chip central processing unit, a communication module and basic functional modules of the smart energy meter. The switching power supply module supplies power to the central processing unit of the single-chip microcomputer, the communication module and the basic function module of the smart electric energy meter respectively, and the central processing unit of the single-chip computer is connected with the communication module and the basic functional module of the smart electric energy meter.

[0018] Such as figure 2 As shown, the switching power supply module includes a rectifying circuit, a neutral line detection circuit, a voltag...

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Abstract

The invention relates to the technical field of three-phase electric energy meters, in particular to a three-phase low power consumption control intelligent electric energy meter based on a zero line judging switching power supply. The electric energy meter comprises a switching power supply module which comprises a rectification circuit, a zero line detecting circuit, a voltage-stabilizing circuit with a line gating function, a zero line judging circuit, a high frequency filter anti-interference circuit and a switching voltage-stabilizing power supply circuit. In the invention, strong interference suppression capacity is obtained while the power is supplied by using the switching power supply, and the electric energy meter still can normally work under the situation that the zero line deficiency or misphase happens.

Description

technical field [0001] The invention relates to the technical field of a three-phase electric energy meter, in particular to a three-phase low-power cost-controlled intelligent electric energy meter based on a zero line judgment switch power supply. Background technique [0002] The existing three-phase cost-controlled smart energy meters generally use a transformer solution for power supply, which has good isolation and anti-interference effects, is stable and reliable, but consumes a lot of power and costs a lot. With the maturity of switching power supply technology, technology developers have begun to try to use a switching power supply solution with small size, light weight, high efficiency, and strong anti-interference ability in the three-phase cost-controlled smart energy meter to solve the problems in the transformer power supply solution. The problem. But on the one hand, due to the poor interference suppression ability of switching power supply, on the other hand...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R22/06G01R31/02H02H7/10
Inventor 李中泽
Owner WUHAN SAN FRAN ELECTRONICS CO LTD