我国目前相当一部分矿井绞车仍采用交流拖动方式,因而牵涉到交流电动机转子外接电阻的计算问题。计算方法一般有两种(详见《煤矿电工手册》第6册):一是按工作图、矿井参数和电机参数进行计算,较为精确,但是计算量大,较繁琐;二是采用经验公式,方法简单,但准确性差。作为现场工程施工,既要求速度快,又要求精确度高,因而找出一种较精确的经验公式是很有必要的。 At present, a considerable part of China’s mine winch is still using AC drag mode, which involves AC motor rotor external resistance calculation. There are generally two calculation methods (see “Coal Mine Electrician Manual,” Volume 6): First, work drawings, mine parameters and motor parameters to calculate, more accurate, but the calculation of large, more complicated; Second, the use of empirical formula, The method is simple, but the accuracy is poor. As the on-site construction, it not only requires high speed, but also requires high accuracy, so it is necessary to find a more accurate empirical formula.