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Micro-arc oxidation special power device selection and experimental analysis

Author: HeYongSheng
Tutor: ZhaoZhiLong
School: Northwestern Polytechnical University
Course: Mechanical Manufacturing and Automation
Keywords: Micro-arc oxidation Pulse Chopper circuit Inverter circuit Drive signal
CLC: TG179
Type: Master's thesis
Year: 2006
Downloads: 184
Quote: 2
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Abstract


Micro-arc oxidation technology is a kind of Al, Mg , Ti valve metal ceramic membrane surface in situ generation of new technologies. As situ ceramic coating having a solid substrate , high hardness, good abrasion resistance attracted widespread attention , and gave birth to a huge market prospects. Power equipment is the key equipment of the technology , micro -arc oxidation has experienced AC power , DC power , and pulse power . Generally agreed that the pulse power can improve the performance of micro-arc oxidation film , so the design of a pulsed power supply used in the experiment to explore micro-arc oxidation process parameters is very important. This paper describes the micro-arc oxidation power supply design process. The design of the main circuit power supply , a chopper circuit and the inverter circuit using a combination of the way through the chopper circuit regulates the duty cycle to regulate the output voltage of the use of the inverter output waveform control circuit , this structure greatly simplifying the structure of the power and control strategy to reduce the size of the power supply . In the control, Intel80C196KC microcontroller based hardware design , the control system hardware comprises a keyboard display circuit , A / D conversion circuit and the power device interface circuit. By the microcontroller to the chopper circuit and the inverter circuit outputs a drive signal to control the IGBT off , to control the output waveform purposes. Completed using the Hall sensor voltage, current collection, and sent LED display. This paper introduces the design of circuit parameters , and debug problems that occur elaborated , introduced anti-jamming design and PCB board production issues should be noted , also made ??some suggestions to further improve the future . Power is completed, we use this power in the aluminum alloy surface micro-arc oxidation experiments carried out and analyzed , lay the foundation for further work .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metallurgy and Heat Treatment > Metal corrosion protection,metal surface treatment > A variety of industrial corrosion and anticorrosive new method
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