由于高层建筑的发展,塔式起重机的应用也越来越广泛。塔式起重机的回转机构是一个很重要的环节,塔机的质量在一定程度上受回转机构性能的影响。现在塔机回转机构选用的电机多数为有级调速电机、串联电阻调速绕线型电机、变频无级调速电机等,而电磁调速电机在塔机回转机构中也有 Due to the development of high-rise buildings, the application of tower cranes is also more and more widely. The slewing tower crane is a very important part of the tower crane’s quality to a certain extent by the slewing mechanism performance. Now tower crane rotary motor selection of the majority of the motor for the step-speed motor, the series resistance speed winding motor, variable frequency stepless speed motor, etc., and electromagnetic speed motor in the tower crane slewing mechanism