本文在分析無刷直流電機系統數學模型的基礎上，提出了無刷直流電機控制系統仿
真建模的新方法。在Matlab/Simulink 中，通過S-函數獨特的結構，建立獨立的功能模塊，如電動機本體模塊、反電動勢產生模塊、速度PI 控制模塊、電流PI 控制模塊等，再進行功能模塊的有機整合，搭建無刷直流電機控制系統快速高效的仿真模型。該方法成功地應用于電動車驅動系統的設計仿真。
關鍵詞：無刷直流電動機；S-函數；仿真建模
Abstract: Based on the mathematical model of the Brushless DC motor (BLDCM), a novel
method for modeling and simulation of BLDCM has been proposed. In Matlab/Simulink,
S-function is categorized into three special structures，then the isolated functional blocks，such as motor block，speed PI controller block, current PI controller block，EMF generated block etc have been modeled By the organic combination of these blocks，the model of BLDCM control system can be established efficiently. This novel method is succeed in designing and modeling actual BLDCM Drives for Electrical bicycle．
Key works: Brushless Direct Current Motor(BLDCM),S-function, Modeling and Simulation