大型塔式起重机主钩变频调速系统(待续)

Variable-frequency Speed Regulating System for Main Hook of Heavy Tower Crane(To be continued)

介绍了国内第一台大型塔式起重机主钩变频调速系统的研制和试验实测数据的分析。采用该系统后解决了大型塔机普遍存在的三大问题（吊钩工作效率低、主拖动电机运行效率低和力矩保护装置可靠性较差），取得了相当可观的经济效益和社会效益，具有广泛的应用前景。

First home made variable - frequencyspeed regulating system for main hook ofheavy tower crane is depicted and test dataare analyzed. Higher efficiency could be ob-tained and reliability of load moment limiterwould be improved by applying the system.