基于双CPU的新型电动机保护装置

A new motor protection device based on double CPUs

介绍一种功能齐备的电动机微机保护装置 ,为解决保护种类增加导致的计算量的增加和为保证采样精度而必须保证一定的采样频率之间的矛盾 ,提出双 CPU的解决方案 ;一块 CPU负责采样控制和有效值的计算 ,另一块 CPU负责保护处理和人机对话。该方案实现简单灵活 ,提高了采样精度 ,使电动机的继电保护性能得到大大增强。

A powerful microcomputer based motor protection device is introduced. In order to resolve the contradiction between the increasing computation due to the increasing of protection types and keeping of sample frequency to guarantee the precision of sampling, a new scheme of using double CPUs is presented. One CPU is in charge of sampling control and computing the effective value of signals,and the other is in charge of protection processing and dialog between users and CPU. The scheme is simple and flexible,so the precision of sampling is improved and the relay property of motor is enhanced greatly.