一种基于耦合电感的非对称脉冲电路

摘要

In the plasma electrolysis process, the use of asymmetric bipolar pulses can effectively avoid the uniaxial polarization effect caused by unipolar pulses, and has the function of optimizing the film structure and improving the film performance. The existing asymmetric bipolar pulse circuit often requires two DC sources, which has complex structure, high cost and circulation problems. Therefore, an asymmetric pulse circuit topology based on coupled inductance is presented in this paper, which just needs one DC power supply and has simple structure. It can make use of coupling inductance of the energy storage and voltage conversion characteristics to achieve positive pulse output and reverse polarity of the negative pulse output. The working principle of the circuit topology is introduced, working waveforms of each mode are analyzed, and the corresponding expressions are deduced. Simulation and experimental results show the feasibility of the circuit. On this basis, the performance of the plasma electrolytic oxidation film is analyzed, indicating the effectiveness of the circuit in improving the performance of the plasma electrolytic oxide film.%在等离子电解氧化过程中采用非对称双极性脉冲可有效避免单极性脉冲所导致的单向极化效应,具有优化膜层结构和改善膜层性能的作用.现有非对称双极性脉冲电路往往需要两台直流源,结构复杂、成本高,并且存在环流问题,为此,提出一种基于耦合电感的非对称脉冲电路拓扑,采用单直流源供电,结构简单,利用耦合电感的储能和电压变换特点实现正脉冲输出和反极性的负脉冲输出.介绍该电路拓扑的工作原理,分析各个模态的工作波形,并推导相应的表达式.仿真和实验结果证明了该电路的可行性,在此基础上进一步进行等离子电解氧化的膜层性能分析,表明该电路对等离子电解氧化膜层性能改善有效.