桥式起重机变频调速及PLC控制的设计

The design of frequency control and PLC control in the bridge crane

介绍了VVVF变频调速和PLC控制技术在桥式起重机电气控制系统中的应用。对各驱动电机采用了步进式调速的控制设计,使起重机运行更平稳安全。同时,对PLC控制程序的保护、报警、故障处理等功能进行了阐述。

An application of frequency control and PLC control technique in the electricity control system of bridge crane was introduced. In order to operate more stably and more safely, the crane adopt to control design of step speed regulation to every drive electric engine. The function of protection,alarm and recovery processing to PLC control program was also represented.