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Alternating current sampling device

A sampling device, AC sampling technology, applied in the direction of measuring device, current/voltage measurement, AC/pulse peak measurement, etc., can solve the problem of occupying too many ports on the controller chip, and achieve the effect of saving ports

Active Publication Date: 2021-02-02
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the AC zero-crossing detection and voltage amplitude sampling in the prior art will occupy too many ports of the controller chip. sampling device

Method used

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Examples

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Embodiment Construction

[0026] Such as figure 1 As shown, in the embodiment of the present invention, an AC sampling device is provided, which includes a rectification circuit 1 , a DC voltage sampling circuit 2 , an AC voltage sampling circuit 3 and a comparator 4 . Each will be described below.

[0027] The rectification circuit 1 is used to rectify the alternating current and convert the alternating current voltage into a constant direct current voltage. The amplitude of the DC voltage output by the rectifier circuit 1 is the effective voltage value of the AC power, so the amplitude information of the AC power can be obtained by sampling the DC voltage.

[0028] The DC voltage sampling circuit 2 is configured to sample the DC voltage output by the rectification circuit 1 to obtain a DC sampling voltage. The DC voltage sampling circuit 2 includes a first voltage dividing circuit 21 and a first operational amplifier processing circuit 22 . The first voltage dividing circuit 21 is used to divide t...

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Abstract

The invention discloses an alternating current sampling device which comprises the components of: an alternating voltage sampling circuit which is used for sampling the voltage of the alternating current for obtaining a low-voltage alternating current sampling voltage; a rectifying circuit which is used for rectifying the alternating current and converting the alternating current voltage into direct current voltage with constant voltage; a direct-current voltage sampling circuit which is used for sampling the direct-current voltage converted from the alternating-current voltage to obtain direct-current sampling voltage; and a comparator, wherein the inverting input end of the comparator is grounded, the non-inverting input end of the comparator is connected with the alternating current sampling voltage output by the alternating current voltage sampling circuit, the power supply end of the comparator is connected with the direct current sampling voltage output by the direct current voltage sampling circuit, and the output end of the comparator is used for outputting sampling signals containing alternating current voltage amplitude information and zero-crossing signals. By adopting the technical scheme of the invention, the amplitude information of the alternating current and the zero-crossing signal can be integrated into one path of signal.

Description

technical field [0001] The invention relates to the field of AC signal sampling, in particular to a sampling device for sampling the zero-crossing point and voltage amplitude of alternating current. Background technique [0002] At present, the AC voltage zero-crossing detection and AC voltage amplitude sampling of inverters and inverters are detected by separate circuits. The controller chip acquires signals for the zero-crossing detection and voltage sampling respectively, so two detections of the controller chip are required. channel for signal detection. Both zero-crossing detection and voltage sampling will occupy the ports of the controller chip, resulting in too many ports of the controller chip being occupied, resulting in insufficient other ports of the controller chip. Contents of the invention [0003] The purpose of the present invention is to solve the technical problem that the AC zero-crossing detection and voltage amplitude sampling in the prior art will o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/22G01R19/175G01R19/04
CPCG01R19/04G01R19/175G01R19/22
Inventor 郭泳颖姜颖异黄猛黄颂儒刘小高
Owner GREE ELECTRIC APPLIANCES INC
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