上海交通大学学报

上海交通大学学报 ›› 2019, Vol. 53 ›› Issue (Sup.1): 88-92.doi: 10.16183/j.cnki.jsjtu.2019.S1.016

• 学报（中文） • 上一篇    下一篇

基于PWM隔离的热电阻温度调理模块设计

赵淄弘，刘明星，严浩，王松，丁捷   

  1. 中国核动力研究设计院设计所 核反应堆系统设计技术重点实验室， 成都 610213
  • 发布日期:2020-04-08
  • 通讯作者: 赵淄弘（1986-），男，四川省成都市人，助理工程师，现主要从事核安全级DCS系统温度采集相关设计与研究. E-mail: 851317849@qq.com.

Design of Temperature Conditioning Module of Thermal Resistance Based on PWM Isolation

ZHAO Zihong,LIU Mingxing,YAN Hao,WANG Song,DING Jie   

  1. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, China
  • Published:2020-04-08

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摘要： 隔离型热电阻温度调理模块适用于复杂的工业环境.传统的隔离型模块基于普通数字隔离技术，需要使用集成数模转换(DAC)芯片，原理复杂，且需要程序进行逻辑控制，存在成本高、体积大等问题.对此，设计了一种基于脉宽调制(PWM)隔离技术的热电阻温度调理模块，将采集的温度调理为4～20mA电流输出，供电电源、输入通道、输出通道相互隔离.该模块具有量程可配、精度高、成本低的特点，可将体积缩小40%，适用于核电厂数字化控制系统(DCS)对现场温度数据的采集与调理.

关键词: 热电阻； 温度调理； 脉宽调制； 隔离

Abstract: Isolated thermal resistance temperature conditioning module is suitable for complex industrial environment. The traditional isolation module is based on common digital isolation technology, and it needs to use integrated digital-to-analog conversion (DAC) chip, which is complex in principle and requires logic control by program. The module designed by this architecture has high cost, large volume and so on. An isolated thermal resistance temperature conditioning module based on pulse width modulation (PWM) technology was designed and adjusted the collected temperature into 4—20mA output current. The power supply, input channel and output channel of the module were isolated from each other. This module has the characteristics of configurable range, high precision and low cost, and can reduce the volume of the module by 40%. It is suitable for the temperature acquisition and adjustment of nuclear power digital control system (DCS).

Key words: thermal resistance; temperature conditioning; pulse width modulation (PWM); isolation

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