Open AccessDesign of Central Controller for EAST ECRH System Based on FPGA
Author(s) -
Yifeng Yang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1549/5/052084
Subject(s) - field programmable gate array , gyrotron , controller (irrigation) , tokamak , control system , computer science , signal (programming language) , power (physics) , electrical engineering , embedded system , control theory (sociology) , engineering , physics , control (management) , programming language , plasma , quantum mechanics , artificial intelligence , agronomy , biology
Electron cyclotron resonance heating is one of the important heating methods for controlled nuclear fusion reactions, which can make up for the shortcomings of the traditional heating methods. To this end, a 4MW long pulse electron cyclotron heating system was designed on the Experimental Advanced Superconducting Tokamak device. This paper mainly introduces the design of the gyrotron controller of ECRH system based on FPGA chip. The control logic of the central controller is based on state machine. Throughout the entire control process, each signal in the system is monitored in real time. Once an abnormality occurs, the main control logic will cut off the high voltage power of the gyrotron as required to protect the gyrotron from damage. In addition to the normal control logic, the FPGA also embeds abnormality diagnosis logic, which monitors the control state transitions of the main control logic and various input signals in real time to determine whether an abnormality has occurred in the system and can diagnose the cause of the abnormality. Timing simulation was done to the FPGA program. The result shows that the controller can respond to the total control trigger signal in real time, accurately control the switching of the cathode and anode high voltage power supply, diagnose and handle various abnormal conditions, and meet the control requirements of the ECRH system.