宝钢四期CDQ吊车变频器制动单元的改造

Renovation of brake unit of crane converter in Baosteel phase Ⅳ CDQ

介绍了宝钢4期CDQ吊车使用的变频控制系统,以及运行过程中发生的制动单元的故障。描述了故障发生的原理,采用的改进措施和实施后的效果。

The paper introduced the frequency conversion control system used by crane in Baosteel's phaseⅣCDQ,as well as the failure of the brake unit during operation,and describes the principle of the failure,the improvement measures adopted and the effect after implementation.