- 學位論文
新型負載共振式蓄電池充電器
A Novel Loaded-Resonant Converter for Battery Chargers
摘要
共振式電源轉換技術與傳統PWM相比較提供許多優點。具有低電磁干擾、低切換損失、體積小和輕巧的構成要素，由於高切換頻率、高充電效率和在二極體裡的低反向恢復損失，因為在開關立即關閉時有低di/dt。在本論文裡提出一個新型負載共振式轉換器應用於蓄電池能量儲存。這新的電路是由一個半橋LCL共振式反向器和一個橋式整流器所組成，且新型負載共振式轉換器的輸出端是經由共振槽整流。 新型負載共振式轉換器操作有兩種導通模式，連續導通模式(CC M)和不連續導通模式(DCM)，操作在CCM下，切換頻率是包括大於1/2的共振頻率，在DCM情況下，發生於新型負載共振式轉換器操作在小於1/2共振頻率。最後針對新型負載共振式轉換器操作在CCM或DCM時加以分析。一個標準充電器電路結合新型負載共振式轉換器設計應用於一顆12V-12Ah蓄電池來製造和測試證明分析，實驗結果證明顯示充電電流可以藉由調整新型負載共振式轉換器的切換頻率成功地控制。從實驗測試結果得到令人滿意的成果。
並列摘要
Resonant power conversion technology offers many advantages in comparison with traditional PWM one. Among them are low electromagnetic interference, low switching losses, small volume and light weight of components due to high switching frequency, high efficiency, and low reverse-recovery losses in diodes because of low di/dt at turn-off instant. In this thesis, a novel loaded resonant converter for battery energy storage applications is presented. This new topology consists of a half-bridge LCL resonant inverter and a bridge rectifier. The output stage of the novel loaded resonant converter is rectified by the resonant tank. There are two conduction modes of operation for the novel loaded resonant converter, continuous conduction mode (CCM) and discontinuous conduction mode (DCM). In CCM operation, the switching frequency is greater than half of the resonant frequency. In DCM condition, it occurs when the operation of the novel loaded resonant converter below half of the resonant frequency. The novel loaded resonant converter operating at either CCM or DCM is analyzed in detail. A prototype charger circuit with the novel loaded resonant converter designed for a 12V-12Ah battery is built and tested to verify the analytical predictions. Experimental results demonstrate that the charging current can be controlled well by regulating the switching frequency of the novel loaded resonant converter. Satisfactory performance is obtained from the experimental test results.