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Voltage collection circuit of aviation alternating current power supply

A technology of AC power supply and voltage acquisition, which is applied in the direction of measuring current/voltage, power supply test, and only measuring voltage, so as to improve the circuit accuracy and eliminate the effect of voltage drop

Inactive Publication Date: 2019-08-23
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of acquisition accuracy and reliability in the traditional aviation AC power supply voltage acquisition circuit, an aviation AC power supply voltage acquisition circuit based on active rectification is proposed

Method used

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  • Voltage collection circuit of aviation alternating current power supply
  • Voltage collection circuit of aviation alternating current power supply
  • Voltage collection circuit of aviation alternating current power supply

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Embodiment 1

[0020] The technical problem to be solved by the present invention is to propose an aviation AC power supply voltage acquisition circuit, which realizes the function of accurately collecting the aviation AC power supply voltage, and has the characteristics of high voltage input resistance, high acquisition accuracy and wide acquisition range.

[0021] Technical solution of the present invention: an aviation AC power supply voltage acquisition circuit, characterized in that the circuit is composed of a step-down circuit, an active rectifier circuit, a filter circuit, and an A / D chip, such as figure 1 shown. A step-down circuit is used to convert the high-voltage AC signal on the aircraft to the range that can be collected by the acquisition circuit, and then the AC signal is converted to a DC signal by an active rectification circuit, and the ripple of the DC signal is filtered by a filter circuit, and finally A / D The chip realizes the digital conversion of the analog signal. ...

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Abstract

The invention provides a voltage collection circuit of an aviation alternating current power supply. The circuit comprises a voltage reduction circuit, an active rectification circuit, a filtering circuit and an A / D chip. The voltage collection circuit is adopted to convert a high-voltage alternating current signal on an airplane into the collectable range of the collection circuit, then, the alternating current signal is converted into a direct current signal through the active rectification circuit, the ripple wave of the direct current signal is filtered through the filtering circuit, and finally, the digital conversion of an analog signal is realized through the A / D chip. The circuit has the characteristics of high voltage resistance input, high collection accuracy and wide collectionrange.

Description

technical field [0001] The invention belongs to the interface acquisition technology of an airborne power supply system, and in particular relates to an aviation AC power supply voltage acquisition circuit. Background technique [0002] Various types of electrical equipment are used more and more in aviation airborne equipment. These equipment mostly use AC 115V power supply with a frequency of 400Hz. Therefore, it is necessary to detect and collect the working voltage status of AC 115V power supply, monitor whether the power supply system is running normally, and Respond in time to protect the safe operation of the power supply system. In traditional circuit design, passive full-bridge rectification is performed on the 115V power supply first. Due to the voltage drop of the diode used in the full-bridge rectification, it affects the acquisition accuracy. For high-voltage components, there is no current resistance at the front end of the circuit, and the damage caused by th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/42G01R19/00
CPCG01R19/0084G01R31/42
Inventor 王凌伟王永国陈奎席鹏秦冲何文静
Owner XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA