基于CAN总线的电动机保护装置的设计  

Design of the protection device for motor control based on CAN bus

作　　者：张韬[1] 温阳东[1] 杨聪慧[2] 

机构地区：[1]合肥工业大学自动化研究所,安徽合肥230009 [2]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《微型机与应用》2011年第2期21-24,28,共5页Microcomputer & Its Applications

摘　　要：对三相异步电动机保护系统的硬件及软件实现进行了研究,以Freescale DSP 56F807微处理器为控制核心,配以CAN总线、液晶显示以及采样等其他功能模块。而现场总线技术把专用微处理器置于测量控制设备中,把单个分散的测量控制设备变成网络节点,将其连接成可以相互沟通信息、共同完成控制任务的网络系统。在算法上由于DSP有强大的数据处理能力,对瞬时电压、电流和负序电流的幅值进行精确的计算而不需考虑时间的问题,用软件计算的方法替代硬件逻辑,减少硬件资源的浪费。This paper mainly includes the hardware and software realization in three phase asynchronous motor protection system. It uses FreescaleDSP 56F807 as the conctrol core,and adds some functions as CAN,liquid-crystal display,sampling and so on to complete the motor protection together. The Field Bus technology which introduced in this paper puts micro controllor in the measuring control devices,and changes the single device to the network node which can comunicate with each other and complete the control function together. In the software,as the powerful capability of data processing,DSP can calculate the amplitude of the instantaneous voltage,current and negative-sequence current accurately and quickly. So this paper uses software calculating instead of hardware logic to save the hardware resource.

关 键 词：数字信号处理器 微处理器 电机控制 现场总线 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]