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Design and Research on Compound Magnetic Field Control System of Aluminum Alloy Electromagnetic Semi-continuous Casting

Author: SuLiang
Tutor: LiaoLiQing
School: Central South University
Course: Power Electronics and Power Drives
Keywords: Low frequency semi- continuous casting Complex magnetic field SOPC μC/OS- Ⅱ ADRC controller
CLC: TG27
Type: Master's thesis
Year: 2009
Downloads: 66
Quote: 1
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Abstract


Composite electromagnetic fields used in casting technology is a set of mechanical , electrical , casting and machining process of multi-disciplinary and new technology in one research topic . Aluminum alloy semi- continuous casting in the production process , the outside of the mold set the low - frequency electromagnetic fields , it is possible to improve the solidification of the crystallization conditions and the quality of the ingot surface , thereby improving the quality of the slab . Composite magnetic control system for the electromagnetic casting apparatus to provide controlled current, in order to achieve the magnetic field control . Therefore, the composite magnetic field control system for semi-continuous casting of aluminum low frequency applications is important. The paper analyzes the mechanism of action and complex magnetic field of low frequency electromagnetic field in a semi-continuous casting forming principle , the requirements of the specific design of the control system of the complex magnetic field ; matrix converter designed power circuit , to discuss the complex magnetic field power circuit output current between Contact ; design a closed - loop control scheme of dual level space vector modulation matrix transform current waveform , the output current to track the changes of a given function . System control circuit design based on PLC and touch screen technology the monitoring layer ; based SOPC ( System on a Programmable Chip ) technology , using FPGA hardware development the VerilogHDL hardware description language to design high frequency dual narrow pulse generator , CAN communication , LCD modules ; utilize ACTEL Cortex-M1 soft core on the FPGA to build an ARM Cortex architecture - based embedded control core . The design of the human-machine interface circuit , the watchdog circuit voltage and current detection circuit. Introduction of embedded real-time operating system μC/OS- Ⅱ build a software architecture to achieve real-time task switching and reasonable resource scheduling ; study and design of the current waveform generator , while the custom user IP design driver function interface . For the complex system process parameters complex and changeable , the power circuit and electromagnetic induction device model , the use of the ADRC controller to achieve control of the output current . Simulation and field operation debug results show that the algorithm can effectively improve the dynamic performance of the control system to obtain satisfactory control effect . The research and design of the entire complex magnetic field controller is reasonable and to be able to achieve the desired results .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Casting > Alloy casting
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