摘要
对适用于电动汽车的空调PTC加热器控制器方案进行设计,利用比较器进行闭环控制以此控制PTC发热器两端电压波动,采用PWM控制调温模式,CAN通讯控制方式,波特率500 K,通讯周期200 ms。首先单片机设定初始值,由硬件调整输出电压值,以达到PTC发热体温度平稳效果;随着温度变换,单片机采集实际温度和工作电流,通过比较器和寄存器,在过流或过温时关断单片机输出,保证安全;采用单片机控制,温度调节可以做到无级调节效果。
The control scheme of PTC heater for electric vehicle is designed.The closed-loop control is used to control the voltage fluctuation at both ends of the PTC heater.The PWM control mode,the CAN communication control mode,the baud rate 500K,the communication cycle 200ms.First of all,the initial value of the MCU is set,the output voltage is adjusted by the hardware to achieve the stable effect of the temperature of PTC fever.With the temperature change,the microcontroller collects the actual temperature and the working current,through the comparator and the register,switches off the output of the single chip microcomputer at over current or over temperature to ensure the safety;the temperature adjustment is controlled by single chip microcomputer.The section can achieve the stepless adjustment effect.
作者
冯雪丽
臧竞之
FENG Xue-li;ZANG Jing-zhi(Mechanical and Electrical Engineering College,Hangzhou Polytechnic,Hangzhou 311402,China;Hangzhou Guang'an Automotive Electrical Appliance Co.,Ltd.,Hangzhou 311407,China)
出处
《机电工程技术》
2018年第12期99-101,共3页
Mechanical & Electrical Engineering Technology
基金
2017级浙江省访问工程师校企合作基金资助项目(编号:FG2017191)
关键词
电动汽车
空调
PTC加热器
控制器
方案设计
electric vehicle
air conditioner
PTC heater
controller
conceptual design
