馬達的散熱問題是影響馬達效率與壽命之一大原因，藉由馬達轉動在非工作軸向 加上風扇，引入氣流通過馬達之散熱鰭片達到降低工作溫度之效果。本文是利用 數值方法計算馬達風扇轉動時所產生之流量並與實驗互相比較驗證，其中簡化封 閉馬達誤差在5%以內、簡化開放馬達誤差在2%以內、簡化開放加入散熱鰭片的馬 達誤差在5%以內，而真實馬達之誤差亦在7%左右；透過一系列簡化封閉、簡化開 放、簡化開放加入散熱鰭片與真實馬達之實驗量測與數值模擬，如此循序漸進建 立一套完整之驗證程序，並在過程中解決數值與實驗不準確之因素，以建立良好 的驗證規範。 Verification and validation (V&V) of computational simulations are the primary method for building and quantifying this confidence. Briefly, verification is the assessment of the accuracy of the solution to a computational model. Validation is the assessment of the accuracy of a computational simulation by comparison with experimental data. Heat transfer was a big problem to influence the efficient and lifespan of a motor. Set a fan on the workless axis when induce flow that pass the sink of motor it will reduce the work temperature. This paper use the CFD software STAR-CD collocation with mesh generation software ICEM-CFD. Predict the volume flow rate induce by the rotation fan and compare with experiment. To go from the simple to the complex with simplification close motor, simplification open motor、simplification with fins motor and real motor then building a Phenomena Identification and Ranking Table (PIRT) for motor simulations and eliminate the uncertain factor.