直流电器 讲座 第三讲 直流接触器节电驱动电路设计  

Design of Energy-Saving Driving Circuit for DC Contactor

作　　者：李环宇 卢奔 周学[1] 翟国富[1] LI Huanyu LU Ben ZHOU Xue ZHAI Guofu(Military Apparatus Research Institute, Harbin Institute of Technology, Harbin 150001, China)

机构地区：[1]哈尔滨工业大学军用电器研究所,黑龙江哈尔滨150001

出　　处：《电器与能效管理技术》2017年第17期78-84,共7页Electrical & Energy Management Technology

基　　金：黑龙江省博士后资助经费(LBH-Z13100)

摘　　要：围绕直流驱动型接触器线圈的耗电问题,比较4种不同的节能方式。为了减小节电驱动电路体积,提高节电驱动电路的可靠性,选择TI公司推出的节能驱动芯片DRV110A进行电路设计。该驱动电路通过PWM闭环控制方式对线圈电流进行调控,实现对接触器线圈电流的有效控制。为了提高接触器开断速度,设计了快速掉电电路。针对定型后的节电驱动电路在不同的环境温度条件下进行10 000次连续通断试验,在常温条件下进行1 h持续通电试验,观察节能驱动电路板温度变化规律,验证其可靠性。结果表明,该电路工作稳定,能有效控制线圈电流,达到节能降耗的目的。According to the power consumption of coils of DC-driven contactor, we compared four different ways to save energy. In order to reduce volume of the power-saving drive circuit and improve the reliability of it. We chose DRV110A which is TI＇s energy-saving driving chip for circuit design. The coil current was controlled by PWM closed-loop control mode to realize the effective control of coil current of contactor. For improving breaking speed of contaetor,we designed fast power off circuit. Under the different temperature conditions, 10 000 consecutive on-off experiment was carried out for the power-saving driving circuit, and one-hour continuous power test was carried out under normal temperature conditions. By these experiments, we observed the temperature variation law of energy- saving drive circuit board to verify its reliability. The results showed that the circuit could effectively control the coil current and achieve the goal of energy-saving and consumption reduction.

关 键 词：接触器 节电驱动电路 PWM闭环控制 快速掉电电路 温度变化 

分 类 号：TM993[电气工程—电力电子与电力传动]