逆变式高频窄脉冲微弧氧化电源的设计
发布时间：2019-02-14 19:21
【摘要】：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 k Hz)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.
[Abstract]:In order to enhance the controllability of the arc in the process of micro-arc oxidation, an inverter high-frequency narrow pulse micro-arc oxidation power source was designed from the point of view of pulse energy control. Based on the traditional two-stage inverter structure, the impedance matching circuit is added to realize the fast energy release and storage in the loop and load in the variable polarity mode. The cooperative control strategy and the corresponding circuit working mode are described in detail. The load characteristics of the power supply are analyzed, and the validity of the equivalent load characteristic model is verified by simulation and experimental waveforms. The experimental results show that the pulse energy can be precisely controlled and the energy utilization rate of the system can be improved by increasing the output pulse frequency (up to 20 k Hz) and reducing the pulse width (the narrowest 20 渭 s),). The surface porosity and surface roughness of the film obtained by high frequency narrow pulse treatment are lower.
【作者单位】： 华南理工大学机械与汽车工程学院;广州市精源电子设备有限公司;
【基金】：广东省-教育部产学研结合项目(2012B091100347)
【分类号】：TN86
[Abstract]:In order to enhance the controllability of the arc in the process of micro-arc oxidation, an inverter high-frequency narrow pulse micro-arc oxidation power source was designed from the point of view of pulse energy control. Based on the traditional two-stage inverter structure, the impedance matching circuit is added to realize the fast energy release and storage in the loop and load in the variable polarity mode. The cooperative control strategy and the corresponding circuit working mode are described in detail. The load characteristics of the power supply are analyzed, and the validity of the equivalent load characteristic model is verified by simulation and experimental waveforms. The experimental results show that the pulse energy can be precisely controlled and the energy utilization rate of the system can be improved by increasing the output pulse frequency (up to 20 k Hz) and reducing the pulse width (the narrowest 20 渭 s),). The surface porosity and surface roughness of the film obtained by high frequency narrow pulse treatment are lower.
【作者单位】： 华南理工大学机械与汽车工程学院;广州市精源电子设备有限公司;
【基金】：广东省-教育部产学研结合项目(2012B091100347)
【分类号】：TN86
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