本論文乃設計非浮接開關之零電流零電壓轉移(Zero-Current-Zero-Voltage-Transition)柔切式升壓型電力轉換器，並推導出其小訊號數學模式，利用電路實作及IsSpice模擬以驗證其正確性，並設計使閉迴路系統具有穩壓功能的控制器，使輸出電壓不受線電壓變動及負載變動的影響。
ZCZVT升壓型轉換器係結合了ZVT與ZCT的優點，輔助開關在一個切換週期內切換至on兩次，產生兩次瞬態共振，使電路元件達到零電壓及零電流切換(ZVS/ZCS)的要求，解決了傳統PWM電力轉換器之高切換損失及共振式電力轉換器之高電壓/大電流的傳導損失及變頻控制等缺點，提昇了切換效率。本文中所設計之非浮接開關之ZCZVT柔切式升壓型電力轉換器，其主開關與輔助開關皆為非浮接式，因此，改善了實作上的困難，而電路所含的元件較少，更可降低成本。
本文利用雙時間尺度平均化法(AM-TTS)，推導出ZCZVT升壓型電力轉換器之小訊號數學模式，以研究其動態行為，並量測電子電路實作之轉移函數以驗證數學模式之正確性。ZCZVT升壓型電力轉換器的阻尼比大於1，比傳統PWM電力轉換器有較好的動態響應。為了達到輸出穩壓的目的，吾人根據此數學模式，分別設計古典控制器與修正型積分可變結構(MIVSC)控制器。經由模擬與實作結果相互比較可知，所設計之MIVSC控制器，在負載變化或線電壓變動下均有較佳之穩壓效果。

In this thesis, a novel non-floating switches, zero-current-zero-voltage-transition (ZCZVT) soft-switching boost power converter is designed. The ac small signal mathematical mode for the ZCZVT boost converter is then derived. The accuracy of theoretical results is verified by experiment and simulation of IsSpice. In addition, two controllers are designed to achieve output voltage regulation. They are used to eliminate the effect of the variations of line voltage and load on the output voltage.
The ZCZVT soft-switching converter exhibits the advantages of both ZVT and ZCT converters. To achieve both zero voltage and zero current switching (ZVS and ZCS), the auxiliary switch of the ZCZVT converter turns on twice and two resonances occur during one switching period. This converter overcomes the existing problems of high switching losses of the conventional PWM converters and the conduction losses due to high voltage and current stresses. As a result, both of the main switch and the auxiliary switch in ZCZVT soft-switching converters are non-floating so that the driving circuit is easier to be designed. Moreover, fewer components in the converter also reduce the cost efficiently.
In this thesis, the two-time-scale averaging method (AM-TTS) is used to derive the small signal mathematical model for a ZCZVT soft-switching converter. Based on this model, the system dynamic behaviors can be investigated. Then the theoretical results are experimentally verified. It is interesting to note that the damping ratio of the ZCZVT converter is greater than one so that the dynamic response of the ZCZVT converter is better than the traditional PWM converter. According to the small signal mathematical model a classical controller and a modified integral variable structure controller (MIVSC) are designed to achieve output voltage regulation. The simulation results and experimental responses show that the MIVSC controller has better regulation capacity under the variations of load and line voltage variations than classical controller.

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