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The Study of Intermediate Frequency Power Supply Control Circuit Base on FPGA

Author: LiYueWen
Tutor: ZhangLiuQiang
School: Chongqing University
Course: Microelectronics and Solid State Electronics
Keywords: IF power Field -programmable gate array (FPGA) Induction heating Digital PLL
CLC: TN86
Type: Master's thesis
Year: 2009
Downloads: 287
Quote: 1
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Abstract


As FPGA technology, with its superiority in design, making it much attention in the field of electronic design, the digital control system applications are increasingly widespread. The main research topics of FPGA technology in the medium frequency power supply control circuit applications, aimed at achieving a secure and stable environment and efficient induction heating. For the control system circuits studied in detail. First, refer to the relevant literature, based on the analysis of the induction heating induction heating principle and the development of technology and the control circuit of the deficiencies. Secondly, the analysis of the frequency power supply control circuit working principle and working conditions, the control circuit is designed to provide theoretical guidance. Finally, the paper proposes a new type of programmable logic devices based control strategy. This article describes the induction heating system involved in some of the concepts and the use to some of the techniques, while each module control principle and feasibility analysis and research. Describes the FPGA design flow, and the design of the control system for the individual hardware circuits. This article revolves around three key elaborate. First, elaborated FPGA-based rectifier control method, using double pulse output to trigger the thyristor, rectifier by controlling the size of the angle to control DC voltage output to control the size of the entire frequency electrical power. Secondly, elaborated FPGA-based all-digital phase-locked loop module, the analysis of its working principle, an improved method of phase-locked loop, increasing the digital locking range, to the maximum load changes follow to find its resonant frequency. Based on digital phase-locked loop, designed sweep module, it stimulated the startup programs transferred from shock. Sweep range can easily be adjusted by changing the design documents, to meet the needs of a variety of different frequencies. Finally, elaborated peripheral hardware circuit design and conduct of the hardware circuit design and simulation. Such as signal acquisition circuit, a feedback circuit, PI regulating circuit and protection circuit. Ultimately, the main control circuit integrated into an FPGA chip, thereby greatly reducing the size of the system and improve the stability of the system and makes the control of induction heating system more intelligent, but also makes its operational safety has been greatly improved, so as to achieve the purpose of the design. The results show that the use of FPGA technology to achieve frequency power supply control is feasible and highly practical.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio equipment,telecommunications equipment > Power supply
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