近幾年醫學治療發展朝向精準醫療，而電磁熱療為治療癌症疾病的新型療法，其治療方式是利用電磁感應加熱的原理來進行熱治療，透過高週波機台在感應線圈內放入導磁性金屬針具，輸出大電流至感應加熱線圈產生交變磁場，金屬針具會因交變磁場產生渦電流，進而使針具迅速升溫，藉此殺死腫瘤細胞達到熱燒灼效果。由於軟性感應加熱線圈可依需求快速改變其線圈形狀，對於熱燒灼治療應用有相當的便利性，故本研究主題在於設計改良其銅片線圈，因磁場強弱程度會直接影響金屬針具的加熱效果，所以藉由改變線圈線材以絞線取代銅片，增加磁場強度來提高其溫升效果。本文先利用有限元素分析法軟體模擬其絞線線圈與銅片線圈間的電磁場分布，並使用電路模擬軟體針對全橋串聯諧振電路系統進行等效模型之模擬，藉由模擬與量測結果做比對，最後繞製多條不同截面積線徑的絞線線圈進行感應加熱實驗，再與銅片線圈進行加熱效果比較，以驗證本文所提出之設計方法與可行性。經加熱實驗結果顯示，兩種感應線圈在直徑及深度大小皆相同件下，當金屬導磁針具進行感應加熱時越靠近線圈邊緣時，絞線線圈會比銅片線圈有更好的加熱效果，進而對其結果進行分析與探討。

In recent years, the development of medical treatment is toward precision medicine, and electromagnetic thermotherapy is a new type of treatment for cancer diseases. The treatment method is to use the principle of electromagnetic induction to carry out heating treatment, which is placed in the coil through a high-frequency induction heater. The magnetically conductive metal needle is heated by the eddy currents that induced from the magnetic field which generated by using an induction heating coil with large alternating currents. Because the flexible coil can quickly change its coil shape according to the needs. Hence, the subject of this research is to design and improve its soft copper coil, so by changing the coil wire to replace the copper sheet with stranded wire, increase the strength of the magnetic field to improve its temperature rise effect. In this paper, the finite element method is used to simulate the electromagnetic field distribution between the stranded wire coil and the copper sheet coil. The circuit simulation is used to simulate the equivalent model of the full-bridge series resonant circuit system. Finally, we wound some stranded coils with different section area diameters for induction heating experiments and then compared the heating effect with copper coils to verify the design method and feasibility proposed in this paper. Under the condition that the two induction coils' diameter and depth are the same, the heating experiment results show the closer to the coil edge, the stranded wire coil will have better heating effect than the copper sheet coil when the metal magnetic needle is heated by induction.

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