“安全、可靠、快速、灵活”是起重机设备理想的控制特性,为确保起重机安全、可靠运行,应尽量采用控制性能好的电气控制系统。随着交流变频调速控制技术的迅速发展和社会节能降耗理念的不断深入,应用绿色环保能源越来越成为企业的共识。由于港口起重机的特殊应用环境,对大能耗设备节能的高要求制约了港口起重机的发展和使用。近年来随着能源和自动化行业微型计算机控制技术和大规模的模块标准化的发展和应用,高效 “Safe, reliable, fast and flexible ” is the ideal control feature of crane equipment. To ensure safe and reliable operation of crane, electrical control system with good control performance should be used as much as possible. With the rapid development of AC variable frequency speed control technology and the deepening of the concept of energy conservation and consumption reduction in society, the application of green energy has increasingly become the consensus of enterprises. Due to the special application environment of port cranes, the high requirements for energy saving of large energy-consuming equipment have restricted the development and use of port cranes. In recent years, with the micro-computer control technology in the energy and automation industry and the development and application of large-scale module standardization, efficient