在過去的幾年裡，電動輔助自行車已經成為一種潮流，電動助力自行車是一種比內燃機機動車輛更環保、更可永續發展的交通方式。本文整體目標是將本實驗室電助車原有的傳動系統進行升級優化，其中馬達設計尤其重要，對傳動系統有著非常大的影響，也是優化的主要目標。
本文將探討及研發電助車之傳動系統的優化，把傳動系統區分為電機部分與機械部分分別優化。電機部分則包含了馬達轉定子與驅動程式，利用模擬軟體去觀察和整理數據，找出轉定子的各種尺寸對馬達的性能表現之影響，再利用整理後之數據，設計出新的轉定子，再去進行實測比對；實測時驅動程式的參數調整也是影響著馬達的整體性能。機械部分則優化了外殼內部固定矽鋼片的方式，也針對起步時的騎乘感做輔助邏輯上之優化。

Over the past few years, electric-assisted bicycles have become a trend, offering a greener and more sustainable form of transportation than internal combustion engine vehicles. The overall goal of this article is to upgrade and optimize the original drivetrain system for the e-bike of this laboratory. Motor design is particularly important, which has a great impact on the transmission system and is also the main goal of improving the whole system.
This article will discuss and develop the drivetrain system of electric bicycles, dividing the transmission system into the motor part and the mechanical part for enhancement. The motor part includes the stator, rotor, and driver program. Use simulation software to observe and organize the data to find out the impact of various factors of the rotor and stator on the performance of the motor. Then use the compiled data to design a new rotor and stator combination, then conduct an actual measurement for validation. The parameter adjustment of the driver program during dyno testing also affects the overall performance of the motor. For the mechanical part, improving the way of fixing the stator inside the casing, and also optimizing the motor assisting logic for the riding feeling at the start.

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