乘用车引擎冷却风扇控制器热保护设计与试验  

Thermal Protection Design and Test for Cooling Fan Controller of Passenger Vehicle Engine

作　　者：杨平[1] 

机构地区：[1]沙洲职业工学院科研处,江苏张家港215600

出　　处：《自动化仪表》2013年第11期9-12,共4页Process Automation Instrumentation

基　　金：2012年度江苏省高校基金资助项目(编号:JHB2012-77)

摘　　要：在乘用车引擎冷却风扇控制系统设计中,如果没有充分考虑直流电机在堵转、低电压、长时间启动等情况下的电机发热量,就会导致电机和控制器损坏,从而给行驶中的乘用车带来极大危害。为此,研究了直流电机在非正常工作状况下的热积累与热发散系统数学模型,并提出了电机过载保护以及电机启动、电机堵转和电机短路等热保护方案,具体给出了温度保护环节的设计和设定方法。相关试验表明,该热保护系统设计合理、运行可靠。该设计方法也为类似系统保护设计提供了一种有益参考。In design of control system for cooling fan of passenger vehicle engine,large heat generating of DC motor under conditions of stalling,low voltage,or long period startup,etc.,must be taken into account,otherwise motor and controller might be damaged,and great harm maybe brought to the runing vehicle.The mathematical models for heat accumulation and heat emission for DC motor working under abnormal conditions are studied; and the thermal protection strategies for overload,startup process,stalling and short circuit,etc.,of the motor; and temperature protection section WphR design and setting method are proposed.The related and experiment verify that this thermal protection system is designed reasonably and running reliably; the design method also provides beneficial reference for similar design of systematic protection.

关 键 词：热平衡保护 PWM A D转换 可靠性 控制系统 

分 类 号：TP215[自动化与计算机技术—检测技术与自动化装置]