- 學位論文
直驅式軸向磁通馬達之最佳性能控制
Optimal Performance Control of Axial-Flux Wheel Motor for Hybrid Electric Vehicles
摘要
本研究目的為改善馬達各項性能表現，提升輸出扭力、拓寬運轉範圍並增進效率。並根據電動車輛的動力需求，嘗試規劃出一套最適合的控制策略，以提升車輛的整體性能。 文中針對實驗室研發的直驅式軸向磁通直流無刷馬達，主要提出三種方式來改善馬達性能。第一，使用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。 本文中的實驗數據是經過實驗設計得來的結果，實驗導入統計中隨機化與重複的觀念，目的是為了消除外來因子造成的影響並得到實驗誤差之估計值，而賦有統計意義的實驗結果將更為精確與可靠。
並列摘要
The objective of this research is to improve the performance of axial-flux wheel motor. We attempt to scheme out a set of control strategy to maximize the driving torque, rated speed and efficiency. This optimal performance control strategy composes of three parts. First, the driving current waveform is proven to be the same as the back EMF to produce maximum torque. Second, the series and parallel connections of motor windings constitute various gears. The low speed or accelerating operation consumes larger current while the high speed or crusing mode needs higher voltage but less current. With appropriate electric gearshift on motor windings, one can fulfill these driving conditions. Last, the back EMF can be reduced by adjusting advanced conduction angle. Thus the motor operating region extends once again and leads to achieve constant-power operation. In this paper, the experimental data are obtained carefully as the result of design of experiments. Randomization and replication are adopted to average out the effects of extraneous factors and obtain an estimate of the experimental error. With the concept of statistics, the experimental results will be more accurate and reliable.