变频器输入缺相保护回路设计

The Design of a Input Phase Lack Protection Circuit for Frequency Converter

变频器作为一个新兴产业正处于蓬勃发展之中,其保护功能也越来越完善。本文介绍一种实用的变频器输入缺相保护回路,在常规输入缺相保护回路基础上串联电容进行隔直;分析了其数学模型,并利用Simtrix仿真软件对线路进行仿真。此保护回路已经在最新开发的系列产品中得到了应用,具有成本低、可靠性高、保护及时等特点。

Frequency Converter as an emerging industry is booming, and its protecting function is becoming more and more perfect. In this paper, a practical input phase lack protection circuit for inverter is designed, which add capacitor for blocking DC current on the basis of general input phase lack protection loop;analyzing the mathematical model, and then simulating the circuit with the Simtrix. The protection circuit has been applied in the latest production with its characteristics of low cost, high reliability, and the timely manner in protection.