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以某聚乙烯生产装置熔融泵变频器的更新及应用为例,阐述了熔融泵变频器的技术参数和性能要求,结合更新所选变频器的控制方式和技术特点,介绍了熔融泵变频器更新调试的操作步骤和要点。“,”Through the example of the updates and application of the gear pump frequency transformer in a polyethy-lene production plant, to describe the technieal parameters and performance requirements of the frequency transform-er. Combined with the control mode and technical characteristics of the new one selected,to introduce the operation and key points in its preliminary test.