摘要：從串聯諧振逆變器的特點出發，將串聯諧振逆變器供電的介質阻擋放電電路等效為由正弦波電流供電的介質阻擋放電電路；對正弦波電流供電的介質阻擋放電電路進行了分析，推導出了放電間隙電壓和放電間隙電流的數學表達式；對放電間隙電壓進行了傅立葉分解，并由此求出了放電間隙的等效阻抗。 敘詞：串聯諧振；介質阻擋放電(DBD)；正弦波電流 Abstract：The DBD circuit powered by series resonant invert can be considered DBD circuit powered by sinusoidal current source on the basis of characteristics of the series resonant invert; The equivalent circuit is analyzed and some equations about discharge gap are deduced in this paper; The discharge gap voltage is represented in terms of Fourier transform ,the equivalent impedance of DBD discharge gap is available. Keyword：series resonant; dielectric barrier discharge; sinusoidal current source