Abstract

The time-domain measurement method can reflect the pulse characteristics and the generation mechanism of the corona-generated audible noise. In this paper, the time-domain waveforms of audible noise (AN) generated by single corona discharge under AC voltage in a coaxial geometry are measured and the influence of background noise is removed on the base of time-domain test results. Different from previous analysis which just cared about the influence from root mean square (RMS) value of voltage, this paper focuses on the characteristics of sound pressure pulses varying with instantaneous voltage in negative and positive half cycle of AC voltage. The results contribute to acquire and reveal the mechanism and features of audible noise generated by AC corona discharge as well as effect of space charges on corona discharge.

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