三臂雙向交錯式直流直流轉換器具單電流感測之解耦合主僕式電流平衡控制

Abstract

本論文以單電流感測控制實現三臂雙向交錯式直流電路，並提出單電流取樣策略，利用取樣機制對單電流感測器所回授的數值作適當的選取以及運算後，可以得到各別電感電流的平均值。本文也利用狀態空間平均的技術推導出控制訊號與輸出電壓以及控制訊號與電感電流差值的轉移函數，藉由轉移函數的推導結果，可以得知電壓調節迴路控制訊號與電流平衡迴路控制訊號彼此互相獨立。最後，本文以FPGA(Field Programmable Gate Array)晶片實現所提出之單電流感測控制，透過模擬軟體以及電路實作，驗證所提之單電流取樣策略能夠得到各電感電流平均值，並經由適當控制後達到各電感電流平衡。

The decoupled master-slave current-sharing control for three-phase bidirectional interleaved DC-DC converter with single current sensor is presented in this thesis. Single-sensor sampling strategy is proposed to obtain all of average inductor currents. In addition, the small-signal transfer functions between three control signals, output voltage and current imbalances are derived by using state-space average method. Based on the theoretical analysis, the voltage regulation loop and both current balancing loops are decoupled. Eventually, all the algorithms are implemented in a Field Programmable Gate Array (FPGA) chip. The simulation and experimental results are provided to validate the proposed single-sensor sampling strategy and current sharing control method.