交直流叠加电源的研制

Design of AC and DC superposition power supply

为了运用电化学腐蚀法制备金属氧化物纳米颗粒,设计了一种有良好动态响应的可调频率的交直流叠加电源。该电源能够输出的最大峰值电压为30 V,允许流经的最大电流为10 A,方波频率为35~101 Hz。电源电路主要包括驱动电路、方波产生电路和直流叠加电路。此电源给出了主电路拓扑结构,分析了电路原理,并对其调频控制方法进行了阐述,给出了调频调压的结果。此电源应用于电化学腐蚀试验中,取得了很好的效果,得到了尺寸为30 nm的四氧化三铁颗粒。在用电化学腐蚀法制备金属氧化物纳米颗粒实验中表明了该电源具有较快的动态响应、频率可调节、稳定性高等优点。

It is proposed to design a good dynamic response and adjustable frequency AC and DC superposition power supply, in order to prepare metal oxide nanoparticles with electrochemical corrosion method. The maximum peak voltage output of the power supply is 30 V, the maximum current allowed to flow through is 10 A, and square wave frequency is 35-101 Hz. The circuit of power supply includes an auxiliary power supply circuit, a square wave generating circuit and the DC superposition circuit. In this paper, the author designs the main circuit topology, analyzes the circuit principle, elaborates its frequency control method and pro- duces the results of voltage and frequency modulation. This power supply is applied to electrodeposition and electrochemical corro- sion test which achieved effective results and obtained the size of 30 nm of Fe304 particles. It is proved that the power supply is possessed of the merits of fast dynamic response, adjustable frequency and high stability in electrochemical corrosion experiment of metal oxide nanoparticles preparation.