本論文旨在研製以DSP控制之休旅車用變頻器，此電路由推挽式轉換器與單相全橋變頻器所構成，推挽式轉換器將鉛酸電池所提供之12V直流電壓提升至200V，而後單相全橋變頻器將此直流電源轉換為與市電相同之110V/60Hz交流電源，供給休旅車上之電器設備使用。本文首先探討車用變頻器之特性，其次將依序說明推挽式轉換器與單相全橋變頻器之操作原理、電路設計考量與控制器設計，最後將實作一輸出功率為1kW之車用變頻器。當變頻器負載為電感性負載時，若輸出電壓不平衡將會造成輸出電流嚴重不平衡，本文提出一數位補償之方法加以消除，實測結果驗證了本電路的正確性與可行性。

This thesis mainly studies and implements a DSP-based inverter for recreational vehicles. The inverter consists of a push-pull converter which converts 12VDC from lead-acid batteries to 200VDC, and a single-phase full-bridge inverter which converts the DC power to 110V/60Hz AC power to supply the electrical equipments in the car. First, the features of the inverter used in a recreational vehicle are discussed. Then the operation principles, circuit considerations and the controller design of the push-pull converter and the full-bridge inverter are studied. Finally, a 1kW inverter is implemented. If the output voltage contains a dc component due to an inductive load, the output current will also be seriously unbalanced. This thesis proposes a digital compensation method to eliminate the dc component. The experimental results verify the theoretical analysis and the feasibility of the inverter.

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