CAJ | 학술논문

为增强微弧氧化过程中电弧的可控性，从脉冲能量控制角度，设计了一种逆变式高频窄脉冲微弧氧化电源。该电源在传统的两级逆变电路结构基础上，增加了阻抗匹配电路，实现了变极性模式下回路及负载中能量的快速释放与存储。文中还详述了实现多种模式输出的协同控制策略及对应的电路工作模式，分析了电源的负载特性，并通过仿真和实验波形验证了该负载特性等效模型的有效性。实验结果表明，通过提高电源输出脉冲频率（最高20 kHz）及减小脉冲宽度（最窄20μs），可实现对脉冲能量的精密控制和提高系统的能量利用率；高频窄脉冲处理模式获得的膜层表面孔隙率和表面粗糙度更低。
위증강미호양화과정중전호적가공성，종맥충능량공제각도，설계료일충역변식고빈착맥충미호양화전원。해전원재전통적량급역변전로결구기출상，증가료조항필배전로，실현료변겁성모식하회로급부재중능량적쾌속석방여존저。문중환상술료실현다충모식수출적협동공제책략급대응적전로공작모식，분석료전원적부재특성，병통과방진화실험파형험증료해부재특성등효모형적유효성。실험결과표명，통과제고전원수출맥충빈솔（최고20 kHz）급감소맥충관도（최착20μs），가실현대맥충능량적정밀공제화제고계통적능량이용솔；고빈착맥충처리모식획득적막층표면공극솔화표면조조도경저。
In order to enhance the arc controllability during the MAO (Micro-Arc Oxidation)process,a high-fre-quency narrow-pulse inverter power supply for micro-arc oxidation is designed in the perspective of pulse energy control.This power supply adds an impedance matching circuit to the main circuit of the source on the basis of a tra-ditional two-stage inverter structure.Thus,rapidly releasing and storing of energy in the circuit and load is realized under the variable polarity mode.Then,a cooperative control strategy is presented to carry out DC /pulsed /variable polarity pulsed modes,and the corresponding operation patterns for the main circuit are also described.Finally,the load characteristic of the proposed power supply is analyzed and the availability of the equivalent model of the load characteristic is verified by comparing simulation and experimental waveforms.Experimental results demonstrate that, for the proposed power supply,both increasing the pulse frequency (up to 20 kHz)and decreasing the pulse width (low to 20μs)help to realize the precise control of pulse energy and enhance the energy utilization of the system,and both the porosity and surface roughness of the coating obtained in the high-frequency narrow-pulse mode are lower.