- 學位論文
柔切式升壓型蓄電池充電器之研製
Analysis and Implementation of Soft-Switching Boost Converter for Battery Chargers
摘要
傳統轉換器開關皆是硬式功率開關作切換，但功率開關在截止與導通切換時，會產生電壓/電流突波，造成開關切換損失，使效率下降及開關元件承受應力上升，且開關容易損壞。本論文以零電流轉移升壓式轉換器研製柔切式升壓型蓄電池充電器，具有零電流轉移之充電器，在電路設計上，將共振槽設計於非主要能量流經回路，降低電路傳導損失，並設計兩個開關，使電路具有定頻控制，能在共振時進行切換，降低開關須承受應力與切換損失及電磁干擾，提升充電效率。 本論文以兩個開關導通情形，分析電路作工原理及操作模式，建立等效電路，設計共振時最佳元件參數。由實驗結果驗證，本論文提出之蓄電池充電器具有柔性切換及定頻控制，其最大效率為98.5%。
並列摘要
Traditional converter switch is used of hard-switching power switch. However, there is a voltage and/or current surge while the power switch operated at the switching-on/cut-off situation. It will cause the switching loss to lower the efficiency, and the switch-component stress upper to be easily broken. This thesis adopts the zero-current-transition boost converter to implement the soft-switching boost converter for battery chargers. The resonance tank is designed in the non-essential energy loop to reduce the conduction losses, and two switches designed of the circuit to have a fixed frequency control. It will be switched in the circuit of resonance to lower the stress of the switch-component, the electromagnetic interference and enhance the charging efficiency. This thesis is to study the theory of circuit and operation modes in the two-switch conduction situation, construct the equivalent circuit and design the parameter value of switch-component. By experiment, battery chargers proposed with soft-switching and fixed-frequency control, the maximum efficiency reaches 98.5%。