Switch power supply-based single-phase low power consumption intelligent electric energy meter

Abstract

The invention relates to a single-phase carrier electric energy meter, and provides a single-phase low power consumption intelligent electric energy meter using a switch power supply scheme. The electric energy meter comprises a power supply module, a singlechip central processing unit, a carrier communication module and a basic functional module of the intelligent electric energy meter; and the power supply module comprises a rectifying circuit, a high-frequency filter anti-interference circuit, a switch power supply circuit and a rectifying filter voltage stabilizing circuit, wherein the output end of the rectifying circuit is connected with the input end of the high-frequency filter anti-interference circuit, the output end of the high-frequency filter anti-interference circuit is connected with the input end of the switch power supply circuit, and the output end of the switch power supply circuit is connected with the input end of the rectifying filter voltage stabilizing circuit.Under the condition of ensuring the original performance of the electric energy meter, the power consumption of the electric energy meter can be effectively reduced, and the requirements of energy conservation and environmental friendliness are met.

Description

technical field [0001] The invention relates to a single-phase carrier electric energy meter, in particular to a single-phase low-power cost-controlled intelligent electric energy meter using a switching power supply scheme. Background technique [0002] In the existing carrier wave energy meter, the power supply generally uses a transformer power supply scheme. Although its isolation and anti-interference effect is good, stable and reliable, it is too large in size, high in cost, and the power consumption of the whole machine is relatively large. With the maturity of the switching power supply technology, the switching power supply scheme with the characteristics of small size, high efficiency, and strong load capacity is gradually used on the electric energy meter, but because the electric energy meter with the carrier communication function is resistant to voltage and anti-interference of the power supply The high requirements make the switching power supply scheme not ap...

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Problems solved by technology

[0002] In the existing carrier wave energy meter, the power supply generally uses a transformer power supply scheme. Although its isolation and anti-interference effect is good, stable and reliable, but the volume is too large, the cost is high, and the power consumption of the whole machine is relatively large.

With the maturity of the switching power supply technology, the switching power supply scheme with the characteristics of small size, high efficiency, and strong load capacity is gradually used on the electric energy meter, but because the electric energy meter with the carrier communication function is resistant to voltage and anti-interference of the power supply Due to the high requirements, the switching power supply scheme has not been applied to the carrier energy meter for a long time

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