問題詳情
四、如果有一台三相八極，380 V，50 Hz 之同步電動機的定子電阻可以忽略，而其每相等效同步電抗為 0.75 Ω。若此電動機的鐵芯及旋轉機械損失均可以忽略，當輸入額定電壓並連接一大小為 3.0 kW 之機械負載至此電動機之轉軸時，其操作功因為 0.9滯後。試問在不改變此同步電動機激磁的前提下，此同步電動機在理論上可以提供的最大功率為多少 W？而此時對應的電動機轉子機械轉速為多少 rpm？輸出轉矩又為多少牛頓-米（N-m）？（25 分）
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