隨著電力電子的發展，直流系統日益興盛，然而傳統的機械式斷路器動作時間過長，直流電網上的半導體元件將會在短路故障發生時承受過多的能量而燒毀，因此有人提出了固態斷路器。本論文旨在以基本電路學和控制學建立電子式斷路器的模型，推導出較精確的數學式，並運用數學運算軟體Math Cad繪製3D圖以求得較佳的電路參數。
最後，根據本文之設計流程，以IGBT和空氣芯電感研製一個輸入電壓為500 VDC、額定電流為200 A的直流電子式斷路器，此電路將利用去飽和發法實現過載電流抑制，無外加元件的方式偵測電流並利用諧振原理以零電流切換排除過載故障，並分別以2.2歐姆、1歐姆和0歐姆負載驗證該電路之可行性。

As the progress of power electronics, DC systems have become more and more popular in recent years. However, the overload protection is a huge challenge for the conventional mechanical circuit breakers because DC current interruption takes too long that the semiconductor devices can’t endure. Therefore, the solid-state breaker is proposed. Based on basic circuit and control theory, the equivalent circuit model is built. Moreover, the parameters are sub-optimized by the 3D-plot.
For verifying the feasibility of proposed method, a solid state breaker with 500 V supplying voltage and 200 A rating current is designed. The implemented is going with three values of resistive load. The breaker implemented with IGBTs and coreless inductor features current detection without auxiliary components, current limiting by IGBT de-saturation, and interrupt fault current by resonant.

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