腫瘤電磁熱療是藉由高頻感應加熱器於體外產生一交變磁場，並對腫瘤細胞周圍的磁性物質進行加熱，使磁性物質升溫至42 ℃至45 ℃之間，藉此殺死腫瘤細胞並達到熱療之效果。本研究之主題在建立一數位電流回授控制算法於電磁熱療系統上，並偵測輸出電流來進行回授及穩定控制。透過高速運算之微控制器做為數位控制核心，藉由頻率調變技術及邊界計算來控制輸出信號並驅動全橋串聯諧振電路。同時輔以一人機介面來讓使用者設定系統相關參數及監控系統狀態，以達到即時控制之目的。經實驗結果證明，本數位回授電流控制系統可即時控制電流於電磁熱療系統上，並將輸出電流穩定控制於35 kHz至250 kHz之間六個頻段的特定頻率，其電流峰對峰值誤差可控制於正負10安培內。

Electromagnetic tumor hyperthermia is a therapeutic method providing an alternative magnetic field using a high-frequency induction heating machine that can heat magnetic substances around tumor cells. If the magnetic substance is heated up to between 42℃and 45℃, it can destroy the tumor cells. The main objective of this thesis is to design a real-time variable-powered heating system that can control the current on the applicator. In addition, this system will detect the current feedback signal and stability control. The core of the system is based on a high-speed microcontroller using variable frequency and calculate boundary to control a full-bridge series-resonant circuit. The system provided a GUI program for user that can set system parameters and real-time monitor the state of the system. The experimental results show that the system can generate fixed and accurate current on the output, and the working frequency within the preset frequency bands in the range between 35 kHz and 250 kHz. In addition, the current can be control in the preset-value with variant less than +/- 10 A (peak to peak).

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