本論文提出並研製一套應用於伺服系統之能量回存系統，此系統以Back to Back換流器的架構為基礎，藉由兩個三相全橋換流器達成雙向的功率潮流，當伺服馬達加速或等速度運轉時，功率潮流為三相市電往電動機方向；進行減速時，功率潮流為反方向。本系統有別於傳統將再生能量消耗於回生電阻上之形式，而是進行市電電網的並聯，將能量回存於市電。控制電路方面以微控制器實現，大幅提升系統可靠度並減少電路體積，更提供系統未來擴充彈性。本研究於伺服馬達進行加減速時，可自動監測直流匯流排電壓，而進行功率潮流方向的判斷，同時加入系統保護機制，以確保電能轉換器正常運作。本論文已針對伺服系統剎車模式做分析，並經由電腦模擬與雛形系統實際測試，驗證本論文所提架構確具能量回存市電之功能。

This thesis proposes and develops an energy recycler applied to servo systems. The architecture is based on a back-to-back inverter. Two three-phase full-bridge inverters are employed to achieve bi-directional power flow. The conventional architecture uses resistors to consume the energy while motors are decelerating. In contrast, the developed grid connected system can restore the energy back to the mains. The control is realized by a microcontroller, which significantly improves the system reliability, reduces the circuit size and provides the flexibility for future expansion. In this study, the control circuit automatically monitors the DC bus voltage to decide the power flow direction when the servo motors accelerate or decelerate. The system protection mechanisms ensure the safe operation of power converters. The developed system is validated by both simulation and experiment.

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