本論文針對微渦輪發電系統設計一雙向電能轉換器，並且對其電流漣波進行抑制，在不加入濾波電容、不提高載波頻率與不增加開關次數的情形下，利用混合開關切換方式來達到漣波的抑制；此電能轉換器須具備能用直流電源驅動馬達並將渦輪機啟動，俟加速到特定轉速後將電機所發出之交流電能轉成直流，以利後續轉換使用。
本文對表面貼磁型同步馬達進行分析與應用，在空間向量調變的基礎下，透過理論計算得到開關切換方法的組合，以及使用磁場導向控制，將此開關法分別應用於直流轉交流的整流模式與交流轉直流的驅動模式，並藉由ANSYS Simplorer軟體進行電路模擬驗證電流漣波的抑制效果，再透過微控制器進行實作驗證。

This thesis develops a bidirectional power converter for micro-turbine generator system and focuses on current ripple reduction. For this purpose, a hybrid PWM is adopted, as it can be better than traditional switching method in the case where the filter capacitor is not added and the switching times and carrier frequency are not increased.
This power converter must be capable of converting DC to AC power in order to drive the generator as a motor and start the turbine. Then, after a certain speed, the AC electric power generated by the generator is converted into DC power for further conversion.
The analysis and application of the proposed Hybrid PWM switching method on an SPM (surface-mounted permanent magnet) machine are carried out. Based on the space vector modulation (SVM), the partition of the space vector is calculated. The switching method is applied to the generator for the driving and rectification task. The analysis and the circuit simulation are conducted by ANSYS Simplorer to verify the q-axis current ripple reduction. Then, the simulation results are verified by experiments using a microcontroller.

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