[[alternative]]Design and Implementation of a Controller for High Frequency Parallel Resonant Inverter in a Contactless Power Transfer System

碩士電機工程學系[[abstract]]本研究建立了一個軌道型非接觸式電源轉換供電系統，應用於無塵室搬運系統中，以改善傳統金屬接觸所產生的粉塵、火花及漏電等問題。耦合變壓器電力傳輸是利用電磁耦合的原理，將電流注入初級側繞組透過鐵芯感應到次級側繞組，不必使用金屬連接，經電磁感應耦合的方式就可以得到電源。因為非接觸式的能量傳遞結構有氣隙存在，為了改善非接觸式供電效率，除了在線圈側加電容補償外，系統的控制迴路中運用追蹤共振頻率的回授控制方法，以提高整體轉換效能。以及為了改善共振電路電壓受負載變動的影響，設計補償電路來達到穩壓控制之目的。在非接觸式軌道上，同時有兩個拾取器，其輸出經SEPIC轉換電路輸出直流電流總共為4.2A，輸出電壓為17.4V，拾取器與軌道的氣隙為20mm，量測得到的系統轉換效率為42.71%，兩個拾取器可以於軌道上相對移動，完成非接觸式供電系統的雛型實驗系統，供後續研究。[[abstract]]In this thesis, a contactless power transfer system with linear rail is designed. The proposed system is applied as an autonomous conveyer system in a clean room. Metal-to-metal connections produce sparks or dust and the risk for electrical shocks. The contactless power system is a solution. The coupling transformer power transfer utilizes the magnetic inductive principle. Current is injected into the primary coils to produce a magnetic field that is linked to the secondary coils via ferromagnetic cores. The power is transferred via the magnetic coupling without a metal-to-metal connection. The contactless power transfer structure exists within a large air gap. The power transmission efficiency is poor. A variable frequency controller is used to track the resonant frequency and compensate for coils connected with capacitors to improve the transmission efficiency. The system resonant voltage is regulated by a controller when the voltage is changed by the load. Two E shaped pickup coils are set up in the contactless linear rail. They are the movable loads over relatively large air gaps. The transmission efficiency between the input power and two SEPIC converter output powers is 42.71% in the case when the total output current is 4.2A, output voltage is 17.4V, and air gap is 20mm. The implemented prototype and its test results are demonstrated for further study