Primary power supply scrambler

Abstract

The invention discloses a primary power supply scrambler of which the circuit structure comprises a power supply module A, a power supply module B, a power supply module C, a diode D1, a diode D2, a diode D3, an MOS tube Q1, an MOS tube Q2, an MOS tube Q3, a singlechip control module, a driving module, a potentiometer, an LCD liquid crystal display module and a keyboard. In the primary power supply scrambler, the diodes and electronic switches are respectively connected in series on the output of the power supply modules (A / B / C) to provide power output for an electronic system, the voltage of A / B / C as well as the on / off time of K1 / K2 / K3 are respectively set, so that a voltage jump of which the duration can be set is obtained at the common output end of the two electronic switches, thereby simulating the functions of overvoltage surging, undervoltage surging and micro power-down. The technology has the advantages of skillful consideration, simple circuit and reliable control. At present, the technology is used to produce multiple surge voltage generators meeting the requirements of aerospace military standard and can simulate the functions of overvoltage surging, undervoltage surging, micro power-down and the like.

Description

Technical field: [0001] The invention belongs to the technical field of electromagnetic compatibility pre-testing, and relates to a circuit structure for superimposing an interference voltage on a primary power supply, in particular to a primary power supply scrambler. Background technique: [0002] Superimposing a certain interference voltage on the primary power supply and supplying power to the device under test to test and verify the anti-interference ability of the device under test is an important part of the EMC pre-test. The primary power supply scrambler involved in the present invention can complete the primary power surge voltage test items required by "Aerospace System Electromagnetic Compatibility Requirements GJB3590-99" and "Aircraft Power Supply Characteristics GJB181A-2003". [0003] There are generally two ways to conduct such tests: [0004] One is to use a digital programmable power supply to conduct a simulation test of power superimposed interference. ...

AI Technical Summary

Problems solved by technology

[0009] 1) The rise and fall times of the output voltage of the digital programmable power supply are too slow to fully meet the test requirements;

[0010] 2) The use of special equipment in the electromagnetic compatibility laboratory has limitations, and it is difficult to pre-test the anti-interference ability of semi-finished products in the production process or products in the process of production and debugging;

[0011] 3) The special equipment for the electromagnetic compatibility laboratory is expensive and the test cost is high. Generally, it is only suitable for the identification test of the product, and it is not suitable for multiple testing and pre-testing of semi-finished products or products in the process of production and debugging.

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