异步电动机的最大允许额定起动容量

Largest rated starting capacity permitted for asynchronous motor

在工程实际中,电动机起动时引起的母线电压下降不能超过规定值.通过建立等值电路和公式推导,得出最大允许的额定起动容量的计算公式,进而确定在各种条件下允许起动的电动机的最大额定功率.分析了影响计算结果的各个因素及近似处理产生的误差.

In practical projects, while an asynchronous motor starting, the drop of voltage on the bus bar must be within the limits which is stipulated by the national standard. By establishing a equivalent circuit and mathematics deduction, a formula, by which we can calculate the largest rated starting capacity that permitted, was obtained. And on the basis of the result, the largest rated power of a motor that permitted on a variety of conditions can be determined. Meanwhile, several factors that change the final result were discussed, as well as the error due to the approximation.