Power interruption test system for precision power supplies and test method thereof

Abstract

The invention discloses a power interruption test system for precision power supplies and a test method thereof. The power interruption test system for precision power supplies includes an interruption performance test device connected with a tested device, and a power supply. The power interruption test system is characterized in that a power interruption module is arranged between the power supply and the tested device, and the interruption performance test device is in feedback control connection with the power interruption module. The method comprises the following steps: the power supplyoutputs power normally; and the interruption performance test device makes the power interruption module output a normal precise supply voltage through feedback control. The control flow of the powerinterrupt test system is simple. The performance of a power interruption protection circuit can be accurately tested. The power interruption width test is highly precise and accurate. The influence ofon-off and load on the voltage is avoided. The method is simple and fast in test.

Description

technical field [0001] The invention relates to a power interruption protection circuit, in particular to a precision power supply interruption test system and a test method thereof. Background technique [0002] With the development of electronic technology, a large number of DC power supply electronic devices are used in modern complex systems such as airplanes and automobiles. Since these electronic devices often have to withstand external stresses such as strong vibrations, shocks, and environmental changes during work, their power supply is prone to damage. Fluctuations or even interruptions. Therefore, protection circuits against power interruptions are designed for such non-fixed-use electronic equipment, that is, the internal normal operation of electronic equipment should not be affected when there is an instantaneous external power interruption. [0003] In order to verify the functional performance of the power interruption protection circuit, it is necessary for ...

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Problems solved by technology

[0004] 1) Intelligently test whether the power supply protection circuit works under a certain interruption width, but the interruption width cannot be accurately set (the switching time of the relay is at the ms level), and it is impossible to accurately test the limit performance of the power interruption protection circuit, such as the limit interruption width Wait;

[0005] 2) Using an analog switch can make the interrupt width setting reach 10us level, but connecting an analog switch in series in the power supply line will cause a significant drop in the voltage on the power side (the internal resistance of the power analog switch is as high as 1Ω or more), and the reduced voltage increases with the load current Changes, cannot meet the high-precision voltage supply and test for electronic equipment that requires precision power supply

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