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An AC voltage instantaneous change device

An AC voltage and transient technology, applied in the direction of converting irreversible AC power input to DC power output, etc., can solve the problems of uncontrollable AC voltage transient phase angle and transient holding time, unable to meet test requirements, and expensive. , to achieve the effect of low price, high reliability and precise control of transient time

Inactive Publication Date: 2008-09-17
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0002] In the field of testing electronic equipment, AC voltage surges, voltage drops and short-term interruptions are commonly used reliability tests. Currently, the test equipment used for AC input voltage transient tests is a programmable AC source. Equipment, this type of test equipment has the disadvantages of high cost and complicated operation; another common method is to use two AC sources and a switch to supply power to electronic equipment, and achieve the transient effect of AC voltage through the switch. The device can not control the transient phase angle and transient holding time of AC voltage, and cannot meet the test requirements of IEC 61000-4-11 AC voltage drop and short-time interruption

Method used

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] Such as figure 1 Said is a functional block diagram of the present invention. In the picture:

[0025] A1: AC input 1, used for high voltage input when doing surge impact test, or normal voltage input when doing voltage drop and short-time interruption test, it is one of the AC voltage transients of the device’s AC voltage, its phase Same as A2;

[0026] A2: AC input 2, used for normal voltage input during surge impact test, or low voltage input during voltage drop and short-time interruption test, is one of the AC voltage transients of the device’s AC voltage, its phase Same as A1;

[0027] B1: Bridge type full-wave rectification, which plays the role of rectifying the full-wave A1 into a DC voltage waveform with a double frequency half-sine wave;

[0028] B2: bridge full-wave rectification, which plays the role of rectifying the full-wave A2 int...

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Abstract

The present invention provides an ac voltage transient device, including an ac input end of the voltage input for the wave shock test, or the voltage input for the voltage falling and shortening broken test; a bridge full wave rectifier for rectifying the signal full wave from the ac input end to the dc voltage signal of duplication frequency half-sine waveform; a change-over switch for transient switching signal from the bridge full wave rectifier; a phase detection, control circuit for detecting phase from the bridge full wave rectifier signal and controlling the on-off of the change-over switch, and a rectifier isolation output circuit. The device is easy to achieve, having lower cost, accurately controlling the voltage transient phase angle and the transient time, all electronic equipment adopting the ac input full wave rectifier, can make the device complete the credible test of the equivalent ac voltage wave impact, voltage fall and shortening break.

Description

technical field [0001] The invention relates to the field of electronic equipment, in particular to an AC voltage transient device. Background technique [0002] In the field of testing electronic equipment, AC voltage surges, voltage drops and short-term interruptions are commonly used reliability tests. Currently, the test equipment used for AC input voltage transient tests is a programmable AC source. equipment, this type of test equipment has the disadvantages of high cost and complicated operation; another common method is to use two AC sources and a switch to supply power to electronic equipment, and achieve the transient effect of AC voltage through the switch. The device is uncontrollable to the transient phase angle and transient holding time of the AC voltage, and cannot meet the test requirements of IEC 61000-4-11 AC voltage drop and short-time interruption. Contents of the invention [0003] The technical problem to be solved by the present invention is to pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/04
Inventor 吴清海郭宇
Owner ZTE CORP
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