Research on the Principle of Fast Amplitude Measurement Based on AC Surge Voltage Test

Le résumé fourni par la source

The airborne equipment of civil aviation airliner has high requirements for rapid measurement of voltage transient process, and accurate AC voltage test is required. The common AC voltage RMS measurement method is mainly realized by the voltage transformer cooperating with the true RMS chip. However, if the compensation capacitance of the true RMS chip is larger, the transient overshoot of the power supply output voltage will be too large due to the delay; The capacitance value is small, the collected signal ripple is large, and the accuracy will be affected. In this paper, a method is proposed to quickly measure the amplitude of the angle between the sinusoidal AC two-point voltage and the phase. By sampling different phase amplitudes, the variable speed integration method is used to realize the fast and accurate response of the output voltage. The feasibility and practicability of this innovative principle are verified by the prototype test of design principle.

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