给出了紧凑型Tesla变压器次级电容的近似解析表达式，计算结果表明，紧凑型Tesla变压器的次级电容主要由内外筒之间的电容和次级线圈引入的附加电容组成。附加电容的值约等于一段与次级线圈长度相同的同轴线电容，该同轴线的内外径与变压器内外筒直径相同。建立了一个分析Tesla变压器的电路模型，利用数值方法验证了解析计算方法的正确性。研制了一个小型Tesla变压器，进行了相关实验，实验结果与计算结果一致。

Analytic expression of secondary capacitance of a compact Tesla pulse transformer was put forward in this paper. Calculated result showed that, two part contributed to the secondary capacitance, namely the capacitance between inner and outer magnetic core and the attached caused by secondary winding. The attached capacitance equaled to the capacitance of a coaxial line which is as long as the secondary coil, and whose outer and inner diameters were as large as inner diameter of the outer magnetic core and out diameter of the inner magnetic core respectively. A circuital model for analyzing Tesla transformer was built to verify the correctness of calculation of the secondary capacitance, and numeric calculation showed that the expression of the secondary capacitance was correct. Besides, a compact Tesla transformer was developed, and related test was carried out. Test results confirm to results calculated result by expression derived.