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AC sampling device

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

Active Publication Date: 2021-11-12
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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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: an alternating current voltage sampling circuit for sampling the voltage of the alternating current to obtain a low-voltage alternating current sampling voltage; a rectification circuit for rectifying the alternating current to convert the alternating voltage into a voltage A constant DC voltage; a DC voltage sampling circuit used to sample the DC voltage converted from the AC voltage to obtain a DC sampling voltage; a comparator whose inverting input terminal is grounded, and whose non-inverting input terminal is connected to the AC voltage sampling circuit For the output AC sampling voltage, the power supply terminal is connected to the DC sampling voltage output by the DC voltage sampling circuit, and the output terminal is used to output the sampling signal including the AC voltage amplitude information and the zero-crossing signal. 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 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 Patents(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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