- 學位論文
混合動力車推進動力系統之設計與開發
Design and Development of Propulsion System for Hybrid Electric Vehicles
摘要
本研究目的為建構一符合混合動力車之驅動系統，並根據電動車輛的動力需求，規劃出一套最適合的控制策略，以提升車輛的整體動力性能。文中所研發的直驅式軸向磁通直流無刷馬達，由多目標函數最佳化軟體進行設計，再經有限元素分析加以驗證。為充份展現馬達性能，使用了三種策略，第一，以反電動勢作為驅動電流波形以得到最大的輸出力矩；第二，藉由馬達繞組串並聯的切換來滿足行車時低速與高速下不同的動力需求；最後，使用激磁相位超前角達到弱磁控制的效果，其定功率的操作使馬達的轉速範圍再一次得到延伸。此外，馬達驅動器的設計與硬體實現也是本研究的另一重要貢獻。為了考慮馬達在行車中高電壓、大電流及易控制的情形下，本研究採用絕緣閘雙極性電晶體作為驅動器之功率開關，完成四相獨立驅動電路設計。另外，藉由電子換檔模組使馬達在串並聯模式間的切換來滿足動力需求。本研究設計與製造的雙馬達雛形、驅動器和電子換檔模組已符合混合動力車要求之目標。
並列摘要
Energy conservation and environmental protection are growing concerns in recent years, which have encouraged the development of various electric vehicles (EVs) or hybrid electric vehicles (HEVs). Many types of EVs have been developed and practically operated but not been comparable with gasoline-powered vehicles. Therefore, it is imperative to develop more efficient and reliable propulsion system for EVs and HEVs. The axial-flux sandwich-type dc brushless motor, featuring compactness, low weight, and high efficiency, have become an alternative for the propulsion system of EVs. This wheel motor is optimally designed to achieve a maximum torque and power output at 28 kg-m and 4.67 kW, respectively, and the efficiency over 90% at rated speed. In order to promote this dedicated motor to its excellence, the electric drive with IGBT inverters is designed and manufactured. In addition, the electronic gearshift and field weakening method are employed to increase the constant power and speed ranges. The contribution of this thesis encompasses the optimal design and fabrication of two wheel motors, their drives, electronic gearshift and an extension of driving pattern. These two wheel motors have been installed on an experimental vehicle, and are going to be implemented on a solar-fuel cell-powered hybrid electric vehicle.