为适应不同的电解酸洗工艺需求，设计了一种基于两级逆变的变极性脉冲酸洗电源及其实时控制方式，该电源具有直流、直流脉冲、交流对称脉冲和交流不对称脉冲等输出形式; 通过电特性曲线测试分析和酸洗表面的微观形貌观察研究了交流对称脉冲电流模式下脉冲频率和电流密度对电解酸洗的作用． 结果表明: 存在与电流密度相对应的最佳脉冲频率，在最佳脉冲频率下进行酸洗，氧化皮去除效率高，工件表面光洁; 最佳脉冲频率随电流密度的升高单调增加，脉冲频率对酸洗效果有明显的影响; 可以通过实时控制频率的方法来提高酸洗效率和改善酸洗效果．

In order to meet the requirements of various electrolytic pickling processes，this paper designs a bipolar
pulse pickling power supply based on a two-stage inverter structure and puts forward its real-time control method．This power supply outputs DC，DC pulse，AC symmetry pulse and AC asymmetry pulse． Through the electrical characteristic analysis and the micro-morphology observation of pickling surface，the effects of pulse frequency and current density on the electrolytic pickling process under the AC symmetry pulse mode are investigated． Experimental results demonstrate that there is an optimal value of pulse frequency corresponding to current density，and the pickling process with the optimal pulse frequency achieves a high removal efficiency of oxide skin with a smooth workpiece surface，and that the pulse frequency of AC symmetry pulse has a significant effect on the pickling result，and the optimal pulse frequency increases with the current density． Therefore，the pickling efficiency and result can be improved by means of the real-time control of pulse frequency．