基于CAN总线的低压智能断路器的设计

Design of the low-voltage intelligent circuit breaker based on CAN fieldbus

低压断路器是供配电系统中一种重要的开关电器。本文介绍以M68HC908GP32单片机为核心的智能断路器的软件设计与硬件实现。该断路器通过拨码开关完成整定电流、脱扣时间、瞬动倍数等参数的设定。通过CAN总线与上位机相连实现通信功能,可由上位机设定断路器的参数,并使上位机获得断路器的各种参数信息,控制断路器的工作状态。

The low-voltage circuit breaker is an important kind of switch used in power system.This thesis introduces the hardware design and the software realization for the： intelligent circuit breaker on the central of microprocessor M68HC908GP32.Through dial switches the circuit breaker can set rated current, tripping time, instantaneous multiple and so on.Moreover, The CAN fieldbus is used to communicate the circuit breaker with the upper computer, then the upper computer can set and get the parameters of the circuit, control the working state of the circuit breaker.