本論文旨在設計一套可彈性調整加熱深度之雙頻感應加熱系統，此設計係考量傳統單頻感應加熱系統之加熱深度固定，且工業表面熱處理之待加工物體多為幾何不規則形狀，若以傳統單頻感應加熱設計對幾何不規則負載表面進行加熱時，容易導致加熱不均勻，因此設計一套可應用於工業表面熱處理之雙頻感應加熱系統，並可依據使用者之加工需求，調整合適之加熱模式進行雙頻感應加熱。本論文詳盡推導雙頻感應加熱系統架構之等效電路，並分析其諧振特性，依據結果進行元件參數設計，同時研擬回授控制策略。接續依照設計規劃實現一套感應加熱系統，並針對系統電路進行實測，以驗證本研究之實用性及穩定性。經測試確認本研發系統確能均勻加熱幾何不規則負載表面，於工業表面熱處理具有實用性，研究成果可供工業及民生產業感應加熱技術開發參考。

This thesis proposes the design of a dual-frequency induction heating system with flexible adjustment of heating depth. Considering that the heating depth of single-frequency induction heating system is fixed and most geometrically irregular objects are difficult to be evenly heated, a dual-frequency induction heating system is, therefore, developed in this thesis that comes with the flexible capability of adjusting the heating mode according to various treatment requirements. In the thesis, the equivalent circuit of dual-frequency induction heating architecture is first comprehensively derived with the analysis of its resonant characteristics. It is followed by the parameter design of each component in the system, while the feedback control strategies are also made. Subsequently, the hardware realization of induction heating system is completed, in which electric circuits are prudently assessed so as to ensure the practicality and stability of the developed system. Test results confirm that the developed system is capable of providing uniform heat for geometrically irregular load surface, supporting its practical application for industrial heat treatment. The outcomes gained from this study serves as beneficial references for induction heating in industry and households.

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