起重机变频电动机的选择

变频器专用电动机是近年才出现的变频器新型配套电动机，我国已批量生产。对该电动机在交流调速及长期稳定运行等不同工况时的特殊性进行理论探讨，并结合实际应用中的问题进行分析，提出利用变频电动机转矩频率关系曲线进行优化设计选型的方法，使变频电动机设计选型容量合理，节约初投资，避免电动机过载而造成事故。

Selection of Frequency Control Motors in Crane

The special motor used for frequency converter is new type one which forms a complete set of FC recently,and has been mass-produced at home. Analyzing its speciality of theoretical and practical questions during AC speedadjusting and long-tern stable runing, proposal optimal model selection method by using the torque-frequency curve of converter motor to make the rationality of the motor design's model selection, save initial investment, and avoid accidence of motor's overload.