反激式微弧氧化电源电流脉冲及其能量控制

Current pulse and its energy control of micro-arc oxidation flyback switching power supply

为了有效控制脉冲能量,提出了一种多电流脉冲单元并联的反激变换微弧氧化功率电源方案.简要分析了微弧氧化电源的负载特性,建立了在微弧氧化负载条件下,耦合电感原副边进行能量交换时的等效电路模型,结合模型分析了能量交换过程对电流脉冲波形和脉冲能量的影响,并进行了仿真和实验研究.结果表明,电流脉冲波形主要受微弧氧化负载参数、负载剩余电压、耦合电感原副边漏感和原边峰值电流的影响;过大的原边峰值电流会导致电流脉冲能量无法控制.

In order to regulate discharging energy of a single pulse availably,a MAO flyback switching power supply made of several current pulse units connected in parallel was proposed.The load characteristics of MAO power supply was analyzed briefly and the equivalent circuit model during energy exchanging between primary winding and secondary winding of coupled inductors was established.Based on the model,the effect of energy exchanging of coupled inductors on current pulse waveform and pulse energy was analyzed,and simulation and experiments were carried out.The results show that the current pulse waveform is mainly affected by parameters and residual voltage of the MAO load,the leakage inductors of primary/secondary winding and the peak current of primary winding,and the pulse energy could be out of control if peak current of primary winding is excessive.