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Title:: Research of Capacitor Charging Technology of Repetitive Transcranial Magnetic Stimulation

作者:: 雷发胜1; 2 ; 张广浩1 ; 吴昌哲1; 张丞1; 霍小林 1; 2Δ; 1.中国科学院生物电磁学北京市重点实验室，中国科学院电工研究所，北京100190；2.中国科学院大学电子电气与通信工程学院，北京100049

Author(s):: LEI Fasheng1; 2; ZHANG Guanghao1; WU Changzhe1; ZHANG Cheng1; HUO Xiaolin1; 2; 1.Beijing Key Laboratory of Bioelectromagnetism, Institute of Electrical Engineering, Chinese Academy of Science, Beijing 100190, China;2.School of Electronics, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049

Keywords:: Repetitive transcranial magnetic stimulation; Capacitor charging technology; Series resonance; Constant current charging; Digital control technology; High frequency transformer

摘要:: 本研究将高频串联谐振恒流充电技术应用到重复经颅磁刺激（rTMS）供电系统，充电电压误差保持在5%以内，刺激频率由原先的几赫兹提高到十几赫兹，有效地提高了rTMS供电系统的充电精度和充电速度。本研究还设计了以STM32为核心的数字控制系统，提高了电源的可控性，解决了传统模拟控制方式不可编程、可控性差的不足。最后搭建了实验样机，连入rTMS系统进行测试，工作在500 V时，rTMS刺激频率最高可以达到31 Hz；工作在1 000 V时，刺激频率最高可以达到20 Hz。

Abstract:: The high frequency series resonance constant current charging technology was used to the power supply system of repetitive transcranial magnetic stimulation(rTMS)which effectively improved the efficiency and reliability of power system of rTMS. The charging voltage error was kept within 5% and the stimulated frequency increased from the original a few Hz to more than 10 Hz. We designed the digital control system choosing STM32 chip as the core, which improved the controllability of system, solved the problems of unable to program and poor controllability caused by traditional analog control modem. 〖JP2〗Finally, we built experimental prototype connecting the transcranial magnetic stimulator, the stimulated frequency reached up to 31 Hz at 500 V and reached up to 20 Hz at 1 000 V.