- 學位論文
具有均流控制之全數位諧振轉換器並聯系統的研製
Design and Implementation of Digital-Controlled Parallel Resonant Converter with Current Sharing Control
摘要
本論文主要研製一數位化多模組並聯之直流/直流諧振轉換器，其在控制方法上，藉由改變的開關頻率實現輸出穩壓的需求，利用諧振電感、諧振電容及激磁電感等諧振槽元件所產生諧振現象，使一次側開關達到零電壓切換，降低開關切換時所造成的損失；二次側加入同步整流，減少二次側的導通損失，有效提升電路整體的效率。其次，本文採用並聯控制為主僕式架構，其使用頻率補償技術，以達到均流控制。 本文利用德州儀器公司所生產的數位信號處理TMS320F28035為控制平台 ，驗證數位式諧振轉換器在實作或設計分析上是否正確。本文所研製之轉換器的規格為輸入直流電壓400V ，輸出電壓12V ，兩級轉換器總額定功率1000W ，開關切換頻率範圍85 kHz ~ 100 kHz。由模擬與實驗結果證實，半載下，最高效率可達95.97% 以上，且可達到均流控制。由以上結果驗證設計與實驗的正確性。
並列摘要
The objective of this thesis is to design and implement a paralleled DC/DC resonant converter controlled by digital signal processor. The control method varies switching frequency to regulate the output voltage. The resonant inductance, resonant capacitor and magnetizing inductance are used to achieve the resonance, which on the primary side of switches to achieve zero voltage switching and reduce switching loss. Furthermore, a synchronous rectification technique is added in the secondary side to reduce conduction loss and increase the efficiency of the circuit. The paralleled DC/DC resonant converter structure is master-slave structure, the use of frequency compensation technique, is used to achieve current sharing control. The signal processor, TMS320F28035, is used as the control platform for the verification of design and implementation. The design specifications include: input DC voltage of 400 V, output voltage of 12 V, total power rating of 1000 W, switching frequency of 60 kHz ~ 100 kHz. Simulation and e experimental results show that under half load condition the maximum efficiency is up to 95.97% and current sharing control of each converter can be achieved. These results confirm the design and implementation.