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Two-channel high voltage DC double-isolation measurement sampling circuit

A high-voltage direct current, sampling circuit technology, applied in the direction of voltage/current isolation, measurement of electrical variables, measurement of current/voltage, etc., can solve problems such as cumbersome installation, high engineering cost, and risk of electric shock, so as to improve safety and work reliability , easy installation and use, and the effect of expanding the measurement range

Inactive Publication Date: 2018-04-13
GUANGDONG YADA ELECTRONICS
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Problems solved by technology

[0003] At present, the scheme adopted to achieve the two-way measurement in the above occasions is generally to use two DC meters or only measure one system voltage. The existing problems are: (1) The voltage and current sampling are not isolated, that is, the voltage system and the Hall The sensors are not isolated, which may cause electric shock hazards when they are installed, used or replaced without power; (2) Using two meters is not only cumbersome to install, takes up a lot of space, but also has high engineering costs

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  • Two-channel high voltage DC double-isolation measurement sampling circuit

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Embodiment Construction

[0012] In order to facilitate the understanding of those skilled in the art, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] In the present invention, the two-way high-voltage DC double-isolation measurement and sampling circuit is applied to a meter to realize the measurement and metering of the two-circuit high voltage. as attached figure 1 As shown, a two-way high-voltage DC double-isolation measurement sampling circuit includes an MCU main control circuit, a first-way current sampling input terminal, a second-way current sampling input terminal, a first-way voltage sampling input terminal, and a second-way The voltage sampling input terminal, the first current sampling input terminal, and the second current sampling input terminal are respectively connected to the current sampling input terminal of the MCU main control circuit through a current isolation sensor; the first volta...

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Abstract

The invention discloses a two-channel high voltage DC double-isolation measurement sampling circuit including an MCU main control circuit, a first and a second current sampling input terminal and a first and a second voltage sampling input terminal. The first and the second current sampling input terminal are connected with a current sampling input terminal of the MCU main control circuit throughcurrent isolation sensors respectively. The first and the second voltage sampling input terminal are connected with a voltage sampling input terminal of the MCU main control circuit through dedicatedmetering chip modules and isolation communication modules in sequence. The first dedicated metering chip and the second dedicated metering chip are connected with a power supply module through power source isolation modules. According to the invention, the circuit has advantages of good safety and reliability, large measurement range, high measurement precision, high mounting and use convenience.

Description

technical field [0001] The invention relates to a sampling circuit, in particular to a two-way high-voltage direct current double-isolation measurement sampling circuit. Background technique [0002] At present, in the field of DC measurement and metering technology, a DC high-voltage power supply system gradually appears. The power supply unit in the IDC room is usually two-way isolated DC power supply. The existing DC double-gun charging pile uses high-voltage DC charging technology, which needs to be measured separately. And measure the two-circuit electricity. [0003] At present, the scheme adopted to achieve the two-way measurement in the above occasions is generally to use two DC meters or only measure one system voltage. The existing problems are: (1) The voltage and current sampling are not isolated, that is, the voltage system and the Hall The sensors are not isolated, which may cause electric shock hazards when they are installed, used or replaced without power; ...

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Application Information

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IPC IPC(8): G01R15/22G01R19/00
Inventor 张梅曾新武雷刚黄喜亮
Owner GUANGDONG YADA ELECTRONICS
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